Intelligent Transformer Substation En

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www.siemens.com/transformersubstations

Intelligent Transformer Substations

for Future-Proof Power DistributionThe Modular Concept Based on 8DJH Medium-Voltage Switchgear

Totally Integrated Power


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The requirements on power distribution and therefore on medium-

and low-voltage grids are increasing continuously.

Changing directions of power flow, load and voltage fluctuations,

which are caused especially by the strongly growing number ofpower supplies from volatile power sources, e.g. photovoltaic/

biogas plants and wind farms, make the distribution grids of today

go to their capacity limits.

Why smart grids?

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Benefits of intelligent

transformer substations

• Monitoring and assurance of

power quality

• Controlling of overloadsituations

• Minimization of loss ofpower grid revenue by notablyreduced interruption times

• Optimization of grid expansion

• Object monitoring of thetransformer substation

Always well supplied –

no chance for blackouts

Many of today‘s transformer substations,originally designed for a merely unidirec-

tional energy flow and equipped withconventional transformers, are no longercapable of coping with the effects of vol-atile power sources. The consequencesare more and more frequent supplybreakdowns in the classical distributiongrid, with ever increasing downtimes.In order to reduce such downtimes nota-bly and to limit the associated blackoutcosts, quick adjustments to the changedload conditions must be possible.

Active distribution grid with intelligent

transformer substations for a smooth

infeed of renewable energies

While the additional load capacity required due to the expansion of renewable energies can be provided by means of grid expan-sion, the effects resulting from the alter-nating direction of power flow, load fluc-tuations, and voltage range limitation canonly be handled with intelligent solutions.The answer is an active distribution gridwith intelligent transformer substations askey components. These contribute to anactive load management in the distribu-tion grid and enable an automatic and fastfault clearance in case of blackouts.In this way, you are always well supplied.

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Conventional grid with unidirectional power flow

Active distribution grid with intelligent transformer substations

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Distribution grids must meet the require-ments resulting from the increasing inte-gration of decentralized power sources.Counterbalancing the effects caused bychanging directions of power flow aswell as load and voltage fluctuationsbecomes the key task in the distributiongrid.

Siemens offers distribution grid opera-

tors a consistent concept for intelligenttransformer substations and the suitablecomponent for every task. The conceptincludes compact medium-voltageswitchgear with communication capabil-ity, regulated distribution transformers,as well as integrated telecontrol andautomation solutions which monitor andcontrol the medium- and low-voltagegrid. In this way, overloads of opera-tional equipment are detected earlierand voltage stability is ensured, e.g. bystipulation of setpoint values for the

decentralized generators.

A stable grid without extension of the

grid capacity

The benefits of this concept are that, inmany cases, decentralized power sourcescan easily be integrated into the existingdistribution grid without expensiveinvestments in grid expansion. Thus, astable grid offering reduced downtimesis guaranteed.

Modular design

The centerpiece of a substation is theassociated medium-voltage switchgear.The switchgear can be integrated modu-larly into a smart grid together with thefollowing components:• Remote terminal units

SICAM MIC/ EMIC/ CMIC• Uninterruptible power supplies SITOP• Communication solutions with TCP-IP,

GPRS, GSM, WiMAX, BPL, UMTS, etc.• Short-circuit/ ground fault direction

indicators SICAM FCM• Current and voltage sensors• Regulated distribution transformers

FITformer® REG• Power quality recorder

SICAM P850 /855• Medium-voltage switchgear from the

8DJH family• Decentralized energy management

DEMS• Control center system for utility

companies SICAM 230• Switchgear visualization SICAM SCC• Connection to: Network control system

SINAUT PowerCC• Substation automation SICAM PAS /AK• Electronic meters AMIS.

Solutions out of one hand make thedistribution grids ready for the challengescreated by the growing integration ofrenewable energies. In addition, theyallow utilities a more efficient operationof their infrastructure, thus offering

important competitive advantages.

A consistent concept:

The suitable componentfor every task


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Conceptual design of anintelligent transformer substation

The above illustration shows the concep-tual design of an intelligent transformersubstation

Medium-voltage switchgear

with motor operating mechanisms toactuate the switch-disconnectors or cir-cuit-breakers from external switchingpoints (e.g. network control center),sensors to measure currents and voltages,and intelligent short-circuit /ground faultdirection indicators

Transformer

Standard transformer or regulateddistribution transformer

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2

3

4

1 24 3

Low voltage

Acquisition of load conditions,power quality measurement,position indicators

Telecontrol unit

RTU*, modem, uninterruptiblepower supply

Typical room planningof a transformer substation

MV s wi t c h g e a r

L V d i s t r i b u t i on

Telecontrol room

T r a n s f or m e r

* Remote Terminal Unit


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Planning, design and maintenance of asmart distribution grid are complextasks for municipalities and distributiongrid operators. The ability to seamlesslyintegrate sensors, actuators, communi-cation and IT systems into the existinginfrastructure significantly reducesthese challenges. Intelligent trans-former substations – with switchgear,transformers, protection devices, aswell as telecontrol and automationsolutions – allow applications for higherreliability of supply.

Intelligent transformer substations

as key components of the modern

distribution grid

In the future, transformer substationswill become a key component in thedistribution grid.

Intelligent transformer substationsallow for:• Management of the low-voltage dis-

tribution grid with handling of meterdata, compensation of reactive powerand harmonics, regulation of thedistribution transformer, as well asthe coordination of supply and load

• Supervision and control of the trans-former substation on the medium-voltage side regarding fault locationand automatic recovery of supply.

• Provision and transmission ofmeasured values and indications fromthe medium- and low-voltage system.

The key components in the grid


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A smart grid communicates

A basic precondition for the operation ofsmart grids is the monitoring and controlof as many grid components as possible.The basis for this is a reliable telecommu-nication infrastructure.

This telecommunication infrastructureon the medium- and low-voltage levelis usually heterogeneous. The mostsuitable technologies for this are sub-stantially determined by the local struc-ture (big city, rural region, distances),the regulatory marginal conditions(transmission power, availability of fre-

quency bands and associated licenses),as well as the applications used.They must therefore be adjusted individ-ually to every customer and every case ofapplication.

The following telecommunicationtechnologies can usually be selected:• Fiber optic or copper cables• Broadband/high-speed powerline

systems• Private wireless networks (e.g. WiMAX)• Public wireless networks.

Essential prerequisites for successfuloperation are both the contractualassurance of a stable communication,also in case of blackouts, and perma-nently attractive data tariffs formachine-to-machine-connections

(M2M).

Siemens offers solutions for all men-tioned telecommunication technologies,including especially hardened, standard-compliant routers and switches, in orderto enable your grid to communicateintelligently.

Your benefits

• Comprehensive customer-specific communication solutionoptimized for the conditionson site

• Profit from our outstandingexpertise both in the energyand the telecommunicationfields


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SICAM CMIC: Portrait

Communication interfacesand protocols• Ethernet: IEC 61850,

IEC 60870-5-104, DNP(i)• Serial: IEC 60870-5-101/-103,

Modbus RTU

Operation and display• Display (128 x 96 pixels) incl.

operation via 4 function keys• LEDs for status indications and

status of the communicationinterfaces

• Integrated web server forconfiguration and diagnostics

Inputs/outputs• 12 digital inputs (24-60 V DC)• 8 digital outputs• Extension modules from the

TM series

Auxiliary voltage• 18-72 V DC

Temperature range • From –40 °C to +70 °C

Safety• Security requests from

tomorrow (BDEW white paperconformity and integratedcrypto chip)

SICAM CMIC

Universal remote terminal unit

SICAM CMIC is a universal automation and

remote terminal unit. With a temperature

range from –40 °C to +70 °C, a high EMC

resistance and the small, compact dimen-

sions, SICAM CMIC can be used in a rough

environment also under smallest space

conditions. With its technical and mechani-

cal benefits, SICAM CMIC is suitable for

electrical distribution substations, gas

distribution stations, hydropower plants,

pipelines, railway power supplies, object

protection, or as an alarm device.

Versatility of SICAM CMIC:

• Nodal functionality for use as sub-ordinate remote terminal unit withserial and Ethernet connection

• Coupling of additional devices overModbus RTU

• Freely programmable user programsfor local control, interlocking or regula-tion tasks, according to IEC 61131-3

• Remote maintenance, remote diagnos-tics, and remote parameterizing

• Configuration, diagnostics and testthrough a web browser, alternativelyvia SICAM TOOLBOX II.

Intelligence of SICAM CMIC:

If all possibilities offered by SICAM CMICare retrieved, the unit can be integratedinto an intelligent transformer substationin three steps:1. Supervision/monitoring2. Telecontrol3. Automation and load flow control.

Universal automation andremote terminal unit SICAM CMIC


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SITOP: Portrait

• Reliable power supply unitsfor almost all system voltages,ratings and demands onregulated 24 V DC, as well ason other output voltages

• SITOP power supply unitPSU200M 24 V DC/5 A and 10A with ultra wide-range input85-264/176-550 V AC andhigh overload capacity

• Additional modules to increasethe availability, e.g. foruninterruptible 24 V DC power

supply, for further operationon hour level (UPS1600) orminute level (UPS500)

• DC-UPS SITOP UPS160024 V DC/10 A and 20 A withdigital inputs/outputs,optionally with USB or twoEthernet/PROFINET interfaces

• Remote monitoring withintegrated web server(UPS1600)

SITOP

Reliable 24 V DC – also in case of power failure

SITOP power supply unit

A reliable, constant power supply isimperative for safe system operation.Depending on the requirements, theSITOP power supply units can beindividually upgraded with extensionmodules as well as with uninterruptiblepower supply units.

The SITOP product range offers high-quality power supply units for almostevery requirement. The technologyproduct line SITOP modular includes thesingle-phase power supply units SITOPPSU200M for maximum demands.

Thanks to their ultra wide-range inputthey guarantee constantly regulated24 V DC even in case of large voltagefluctuations, and are as well suitable fortwo-phase operation. The power boostdelivers up to three times the ratedcurrent for a short time in order toswitch high loads also without problems.

DC-UPS for 24 volts nonstop In case of a power failure, guaranteeduninterrupted operation of protectionand control units is decisive. The motoroperating mechanism of the switch-disconnector or circuit-breaker must alsostill operate safely in case of a powerfailure. To ensure this, the SITOP powersupply units can be upgraded to an unin-terruptible 24 V DC power supply system.Depending on the energy demand,maintenance-free battery modules withlead-gel batteries enable further opera-tion in the range of hours. The intelligent

battery management of the DC-UPSmodule SITOP UPS1600 monitors allrelevant operating data.

Extremely communicative

The grid and battery status can even betransmitted to PC or PLC systems viaEthernet / PROFINET. The integrated webserver also enables remote diagnostics.


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SCALANCE M874 coupled with SICAM CMIC

Mobile communication routerSCALANCE M874

The SCALANCE M874 are mobile commu-nication routers for the cost-effectiveand safe connection of Ethernet-basedsubnetworks and automation devices viathe mobile communication network.SCALANCE M874-3 uses mobile commu-nications of the 3rd generation (UMTS)and supports HSPA+ (High Speed PacketAccess). In this way it allows high trans-mission rates of up to 14.4 Mbit/sdownlink, and up to 5.76 Mbit/s uplink(depending on the infrastructure of themobile communication provider).SCALANCE M874-2 uses the mobile

communication network of the 2nd generation (GSM) and supports GPRS(General Packet Radio Service) andEDGE (Enhanced Data Rates for GSMEvolution). Access and communicationsecurity is guaranteed by the safety func-tions of the integrated firewall, and bythe VPN tunnel (end-to-end encryptionof the communication connection by theestablishment of IPsec tunnels).

Applications:

The SCALANCE M874 routers are univer-sally applicable. Due to their design andelectrical properties, the routers areespecially suitable for industrial applica-tions:

• World-wide flexible system access formaintenance and diagnostics purposes

• Connection of static and mobile partici-pants for control and monitoring of e.g.– Sewage and water treatment plants– Oil and gas supply– District heating networks

– Power distribution– Pumping stations– Traffic engineering

• Applicable world-wide* by– UMTS (penta-band technology)– GSM (quad-band technology).

SCALANCE M874: Portrait

• Robust plastic enclosure

• Automatic dial-up and holdingof the IP-based online connec-tion to the Internet

• Integrated IPsec

• VPN tunnel encryption

• Management and configurationvia comfortable WBM

• Diagnostics via SNMP

• Comprehensive logging infor-

mation available via SysLog• Extended event management

via e-mail, SMS and digitalinput

• Fast mobile diagnostics withsmartphone/tablet thanks toWebApp

* Note: Country-specific approvals must be observed!


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SICAM FCM

On the pulse of your distribution grid

SICAM FCM is a short-circuit and groundfault indicator with direction indication,operating with protection algorithmsand the latest low-power sensortechnology according to IEC 60044.This provides best results, especially inisolated or compensated distributiongrids. For workload monitoring of distri-bution grid components, SICAM FCMoffers comprehensive measured values.The evaluation of this data can be usedfor a specific network planning regard-ing grid expansion and the application of

investment funds. Through a ModbusRTU interface, SICAM FCM delivers allrelevant information, thus allowing toevaluate and display the status of thedistribution grid correctly and precisely.

Benefits at a glance: • The first short-circuit indicator to

employ sensors conforming to thestandard IEC 60044-7/-8

• High-precision measurement withoutcalibration and adjustment to theprimary values

• Usable in all grid types• Precise and fast fault localization

for minimum expenses regardingpersonnel and traveling costs

• Selective fault information withdirection indication as a basis for“self-healing” applications

• Resupply times possible in the rangeof minutes or seconds (depending onthe primary equipment)

• Minimum loss of power grid and endcustomer revenue

• Reliable measured values for opera-tional management and planning.

Digital SC indicator with measuring function

SICAM FCM feeder condition monitor

SICAM FCM: Portrait

Communication• Interface RS485 Modbus RTU

Operation and display• 4 function keys, 3 LEDs and

display

Inputs/outputs• 3 inputs for alternating voltage

100 V/√3 or low-power sensors3.25 V/√3

• 3 inputs for alternatingcurrent low-power sensors225 mV@300 A

• Alternative current input L2 forlow-power sensor 225 mV@60 Afor sensitive ground faultdetection

Auxiliary voltage• 24-60 V DC, 230 V AC• Battery for 2,000 hours,

service life approx. 20 years

Temperature range• From –30 °C to +70 °C

Measurands• TRMS (True RMS) measured

values• Phase voltage and currents;

ground current; powerfrequency and cosφ; active,reactive and apparent power


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Low-power sensors: Portrait

• Current and voltage sensorsaccording to the internationalinstrument transformerstandards IEC 60044-7 or -8

• Accuracy class 0.5, 1 or 3

• No calibration or adjustmentto the primary values

• Small size for retrofitting andfor new systems

• Tested for severe ambientconditions (temperature/condensation/EMC)

• Installation Switchgearminimally interfered withduring installation

Low-power sensors

Our low-power sensors conform to thestandards IEC 60044-7 and -8.They offer measured values for currentand voltage which are e.g. acquired andprocessed in SICAM FCM. This enableshigh-precision measurements withoutcalibration or adjustment to the primaryvalues.

Current sensors

The current sensors are inductive currenttransformers whose secondary windingdelivers a voltage signal through a preci-

sion shunt. At the rated primary current,this is 225 mV. The current sensors areavailable in two versions: Divisible cable-type current transformers – used espe-cially for retrofitting existing switchgear,and closed ring cores – mounted on theoutside-cone bushing of the 8DJHswitchgear in a single- or three-phaseversion.

In this context, the three-phase versioncan also be equipped with two phasecurrent sensors and a zero-sequencecurrent sensor for sensitive ground faultdetection.

Voltage sensors

The voltage sensors are resistor dividerswhich provide an output signal of3.25 V/ √3 at the rated primary voltage.The voltage sensors are available as cast-resin plugs, which are inserted into thecable T-plugs instead of the blind plugs.Here, the cone conforms to the type C

standardized in EN 50180/50181.

Intelligent current and

voltage sensors

Low-power sensors


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Regulated distribution transformerFITformer® REG

As one of the main components in distri-bution stations, transformers fulfill animportant task: They are responsible forthe final customers being supplied withthe correct voltage. Grid operators musttherefore guarantee a low voltage supplywithin the allowed voltage band forevery household. However, the risinginfeed of renewable energies overstrainmany transformer substations. Consider-able voltage fluctuations are the conse-quence and can even lead to aninfringement of the permissible voltageband.

Increasing trend towards regulated

distribution transformers

In case of non-compliance with the vol-tage quality criteria due to the decentra-lized supply from renewable energies,grid operators are forced to a costlyexpansion of the distribution grid.In this context, regulated distributiontransformers, such as FITformer® REG,represent a cost-efficient alternative.

FITformer® REG

Their application helps to decouple themedium- and low-voltage grid as regardsvoltage stability. Thus, ranges of +/- 10%are available in both grids for regulationpurposes.

Regulated distribution transformers haveestablished themselves as an integralcomponent of smart grids, as real-timemonitoring and control of the low-voltagegrid is absolutely necessary for a stablepower supply as the proportion ofrenewable energies increases.

FITformer® REG – the adaptabledistribution transformer

The ratio of the regulated distributiontransformer FITformer® REG can bechanged under load. These adjustmentsare possible due to the three-steplow-voltage load regulation range of thetransformer. With this transformer,energy suppliers can guarantee the sup-ply voltage within the tolerance limits,and comply with the standard EN 50160.

FITformer® REG: Portrait

• Power range up to 630 kVA,max. operating voltage: 36 kV

• Low-voltage load regulationrange in three steps

• Operating properties anddimensions correspond tothose of common distributiontransformers

• Design example21 kV/420 V

Example for possible loadregulation range:

+/- 3.57% @ 400 kVA

+/- 4.34% @ 630 kVA

• Additional setting range on thehigh-voltage side for optimumoperation:+/- 2.5% and +/- 5%(adjustable in de-energizedcondition)


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SICAM P850/ 855

Power meter and power quality recorder SICAM P850/ 855

Device description

The multifunction measuring deviceSICAM P85x serves for acquisition, visual-ization, and transmission of measuredelectrical values such as alternatingcurrent, alternating voltage, frequency,power, harmonics, etc. Acquisition andprocessing of measurands and eventsare performed according to the powerquality standard IEC 61000-4-30.Through the communication interfaces,the measurands can be transmitted to aPC and to the control and protectionsystem, or shown on a display.

As an all-in-one device, SICAM P855offers a combined recording andevaluation function in addition to themonitoring function: Measured valuescan be recorded at programmable timeintervals with various recorders, e.g.power quality and fault recorders.Long-time data and events are evaluateddirectly in the device according to thepower quality standards (e.g. EN 50160),and issued as a report.

Benefits at a glance:

• Universal for single-phase, three- andfour-wire grids (with neutral conductor)

• Large current measuring range(up to 10 A max.)

• High accuracy due to small measuringerror

• Easy parameterizing by integratedweb server

• Safe data storage by battery buffering• High interference immunity.

SICAM P850/ 855: Portrait

Communication interfacesand protocols• Ethernet: MODBUS TCP,

IEC 61850 Edition 2• Serial: Modbus RTU,

IEC 60870-5-103

Operation and display• Full graphic display incl.

operation via 4 function keys• 4 LEDs for status and fault

indications• Integrated web server for

interaction with PC via HTMLpages

Input measuring circuits• 4 x alternating voltage,

3 x alternating currentup to max. 10 A

Auxiliary voltage• 24 - 250 V DC• 110 - 230 V AC, 50/60 Hz

Housing specification• Plastic enclosure for

top-hat-rail mounting,optionally flush mounting

• Dimensions:96 x 96 x 100 mm (W / H / D)

• Degree of protection: max. IP51


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The 8DJH family for themedium-voltage distribution grid

Medium-voltage switchgear

8DJH and 8DJH 36

The gas-insulated medium-voltageswitchgear types 8DJH and 8DJH 36 arethe basis for applications in intelligenttransformer substations. These modularswitchgear assemblies allow the variablearrangement of the functions – bothwithin a panel block and in more com-plex switchgear layouts. All individualpanels and panel blocks can optionallybe extended. Thus, almost all schemearrangements can be implemented with8DJH switchgear.

The compact 8DJH Compact

8DJH Compact has been especiallydeveloped for transformer substationsin which space requirements are animportant issue. This switchgear pro-vides maximum functionality on mini-mum space. With its smaller standingsurface in comparison to other block-type or extendable switchgear types,8DJH Compact leaves more space foradditional low-voltage feeders, moremedium-voltage cable feeders, or intelli-gent functions. Shorter transformercables and reduced expenses for laying

these cables inside the transformersubstation provide further advantages,reducing the investment costs.

8DJH switchgear

Space saving:The 8DJH Compact

The illustration shows the spacegained for four low-voltagein-line feeders, or an additionalmedium-voltage cable feeder,by installing 8DJH Compactwith a width of 700 mm incomparison with a conventionalring-main unit with a width of1,050 mm


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Characteristics of the 8DJH family:

Environmentally independent

Hermetically welded switchgear vesselsmade of stainless steel as well as single-pole solid insulation make the partsunder high voltage of 8DJH switchgear• Insensitive to aggressive ambient

conditions, such as:‒ Saline air‒ Air humidity‒ Dust‒ Condensation

• Tight to ingress of foreign objects,

such as:‒ Dust, pollution‒ Liquids‒ Small animals‒ Humidity.

Compact

Thanks to the use of SF6 insulation,compact dimensions are possible.Thus:• Existing switchgear rooms and sub-

station rooms can be used effectively• New constructions cost little• Costly city-area space is saved.

Safe for operation and cost-efficient

Switchgear vessels designed as sealedpressure systems, maintenance-freeswitching devices and enclosed cableplugs ensure:

• Maximum supply reliability• Personnel safety• Sealed-for-life design according to

IEC 62271-200 (sealed pressuresystem)

• Installation, operation, extension andreplacement without SF6 gas work

• No maintenance cycles• Reduced operating costs• Cost-efficient investment.

8DJH Compact switchgear 8DJH 36 switchgear

8DJH family: Portrait

• Comprehensive supply ofgas-insulated switchgear forsecondary distribution grids

• High cost-efficiency byclimate-independent,durable and maintenance-freeswitchgear

• High switchgear availabilityand personal safety

• Minimized space requirementsby compact dimensions

• High product quality fromSiemens, one of the pioneersof gas-insulated switchgear

• Protection of investment bypossible integration in smartdistribution grids

• Reliable and competentsupport on site – fromplanning to operation


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The integration of componentsinto the medium-voltage switchgear


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Component Function

Uninterruptible power supply (UPS)

Depending on the requested bridging timein case of power failures, an uninterruptiblepower supply based on battery or capacitormodules is used.

The task of the UPS is to continue to ensurethe communication and/or the possibilityto telecontrol the transformer substation incase of power failure.

Remote terminal unit

The remote terminal unit (RTU) is equippedwith binary inputs and outputs, variouscommunication interfaces, and freely pro-grammable user programs.

Inside the intelligent transformer substation,

the RTU serves as a connecting element tothe network control center. It collects all rele-

vant signals and receives control commands,

or works autonomously according to prede-

termined control or regulation algorithms.

Communication modem

The selection of the communicationmodem to be used is determined by theselected or available telecommunicationtechnology.

Communication modems are employedfor safe data transmission from the remoteterminal unit to the network control centerusing the selected telecommunicationtechnology.

Intelligent SC indicators

Intelligent short-circuit and ground fault indi-cators with or without direction indicationcan be used in all grid types. For communica-tion with the RTU, a Modbus RTU interface isavailable.

Intelligent short-circuit /ground fault direc-

tion indicators report short-circuits or groundfaults in the medium-voltage distribution

grid. Relevant measured values are acquired,

allowing for an active load management in

the distribution grid.

Remotely controllable operating

mechanisms

Motor operating mechanisms inside thering-main unit are available in originalequipment manufacturer quality. Ifrequired, retrofitting is easily possible.

In order to reduce the reclosing times incase of fault, the switch-disconnectors orcircuit-breakers are equipped with motoroperating mechanisms for remote control.

Current sensorsCurrent sensors with low-power trans-former technology are available as closed ordivisible ring cores.

The current signal serves to detectshort-circuits and ground faults, and can beused as a measured value for load flowcontrol or for optimal utilization of the gridcapacity.

Voltage sensors

Voltage sensors as resistor dividers areavailable as cast-resin plugs for insertioninto the cable T-plug.

The voltage signal serves to detect thedirection of the short-circuit or groundfault, and can be used as a measured valuefor load flow control or voltage regulation.

The switchgear of the 8DJH series isoptionally equipped with motor operatingmechanisms, short-circuit indicators,voltage detecting systems, as well as withfurther sensors.

RTUs can be optionally integrated insidethe switchgear, in additional low-voltagecompartments or in a separate wallcubicle via a plug connection. In this way,the switchgear fulfills all preconditionsfor integration in an intelligent networkinfrastructure.

Depending on the purpose, differentcomponents for monitoring andcontrol are used: These componentscan also be easily and quickly retro-fitted at a later time.

Overview and explanation of the components:


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1. Monitoring 2. Telecontrol

• Increase of availability

• Fast fault localization

+• Remote terminal unit with communication

connection

• Short-circuit/ ground fault direction indicators

• Current sensors

• Voltage sensors

• Auxiliary switch contacts

• Uninterruptible power supply

• Remote terminal unit with communicationconnection


• Current sensors

• Voltage sensors



• Minimization of downtimes (“h“ => “min“)

• Motor operating mechanisms of theswitch-disconnectors or circuit-breakers

Step by step to more intelligence

The illustration shows the stepwise expansion levels:Monitoring, telecontrol and load flow control


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3. Load flow control

+ =

The modular

concept for thesmart grid

of the future

• Remote terminal unit with communicationconnection


• Current sensors

• Voltage sensors



• Power meter and power quality recorder

• Regulated distribution transformer

• Regulation algorithms, software componentsfor flow control

• Regulation algorithms for the regulated distributiontransformer

• Motor operating mechanisms of theswitch-disconnectors or circuit-breakers

• Minimization of losses

• Management of decentralized power supplies

The 3-level concept

In order to conform to the increasedrequirements also in the future,three levels of intelligence can beimplemented.In the first level, the focus is onsubstation monitoring, in order toincrease the availability and to allowfor a fast fault localization.

The second level contains, besidesmonitoring, also the possibility totelecontrol the switchgear, thusallowing the minimization of down-times.In the third level, the effects ofdecentralized power supplies aremanaged via automation. Gridlosses can thus be notably reduced.

By installation of intelligent control,measurement and regulationsystems, conventional transformersubstations can be upgraded stepby step. In this way they are per-fectly prepared for their integrationinto smart grids. Depending onthe desired expansion level, thenecessary components must be

configured.


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Benefits

• Higher availability

• Faster fault localization


• Current and voltage valuesfrom the medium-voltage side

The expansion levels for the modular concept

1st level: Monitoring

Target:

In the first level, the focus is on trans-former substation monitoring, in orderto allow for a fast fault localization andto reach a higher availabilit y. However,travel time to the transformer substa-tions is still necessary to eliminate thefault, preventing a substantial reductionof the downtimes.

To do this, the following components

are used:

• Remote terminal unit with communi-cation connection

• Short-circuit/ ground fault directionindicators

• Current sensors• Voltage sensors• Auxiliary switch contacts• Uninterruptible power supply.

1. Monitoring


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Benefits





• Minimization of downtimes

• Reduction of the reclosingtimes

2nd level: Telecontrol

2. Telecontrol

Target:

Today, typical downtimes of transformersubstations are in the range of hours, asthe maintenance teams must identify thefault location in the affected ring on site,drive to the individual transformer sub-station, and isolate the fault. The appli-cation of short-circuit or ground faultdirection indicators only represents animprovement for a fast fault localization.

A further reduction of time is possibletoday by using remote terminal units,with characteristics especially tailored

for this task. Downtimes can thus bereduced from hours to just a fewminutes.


are used:



• Current sensors• Voltage sensors• Auxiliary switch contacts• Uninterruptible power supply• Motor operating mechanisms of the

switch-disconnectors or circuit-breakers.


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3rd level: Load flow control

Target:

Changing directions of the energy flowas well as load and voltage fluctuations,caused by a continuously rising numberof renewable energy producers, makethe distribution grids of today go moreand more to their limits, and partiallyalso exceed the allowed voltage limits.The aim of the third level is to counteractthese effects by means of control andregulation algorithms, to adhere to theallowed limits of the distribution gridagain, and to postpone or even avoid anexpensive grid expansion.


are used:



• Current sensors• Voltage sensors• Auxiliary switch contacts• Uninterruptible power supply• Motor operating mechanisms of the

switch-disconnectors or circuit-breakers

• Power meter and power quality

recorder• Regulated distribution transformer• Regulation algorithms, software

components for flow control• Regulation algorithms for the regulated

distribution transformer.

Benefits





• Minimization of downtimes

• Reduction of the reclosingtimes

• Minimization of losses

• Management of effects fromdecentralized power supplies

• Reduction of grid losses

• Regulation of RDT



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Able to cope with all requirements:The communication for anintelligent secondary distribution

Communication concept: Transformer substation – RTU – network control center including time synchronization

SICAMCMIC

Control system

NTP *

EthernetIEC 60870-5-104

Intelligentshort-circuit/ ground faultdirection indicator, e.g.SICAM FCM

MV switchgear withmotor operatingmechanisms, e.g.8DJH with Modbus MCU

Regulateddistribution trans-former (RDT), e.g.FITformer® REG

Power meter andpower qualityrecorder, e.g.SICAMP850/P855

RS485Modbus RTU

* NTP (Network Time Protocol)


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Technical features

Rated values up to 17.5 kV, 25 kA, 1 s 24 kV, 20 kA, 3 s

Rated frequency 50/ 60 Hz 50 /60 Hz

Busbar current up to 630 A 630 A

Feeder current up to 630 A 630 A

Busbars Single busbar

Insulation Gas-insulated

Switchgear vessel Hermetically enclosed

Type of switchgear Factory-assembled, type-tested, metal-enclosed switchgearaccording to IEC 62271-200, modular and extendable (option),panel blocks consisting of 2, 3 and 4 panels

Internal arc classification (option) IAC A FL/FLR 21 kA, 1 s

Dimensions

Block width

depending on number and type of panels

620 mm to 1720 mm

Block height Optionally 1200 mm, 1400 mm or 1700 mm(each without low-voltage compartment)

Height of LV compartment Optionally 200 mm, 400 mm, 600 mm, 900 mm

Block depth tiefe 775 mm, 890 mm (with pressure relief duct at the rear)

8DJH

Technical features

Rated values up to 17.5 kV, 25 kA, 1 s 24 kV, 20 kA, 3 s

Rated frequency 50/ 60 Hz 50 /60 Hz

Busbar current up to 630 A 630 A

Feeder current up to 630 A 630 A




Type of switchgear Factory-assembled, type-tested, metal-enclosed switchgear accordingto IEC 62271-200, panel blocks consisting of 3, 4 and 6 panels

Internal arc classification (option) IAC A F/FLR 21 kA, 1 sDimensions

Block width

depending on number and type of panels

620 mm, 700 mm, 930 mm, 1010 mm, 1240 mm, 1400 mm

Panel height Optionally 1400 mm or 1700 mm

Panel depth 775 mm

8DJH Compact

Technical features

Rated values up to 36 kV, 20 kA, 3 s

Rated frequency 50/ 60 Hz

Busbar current up to 630 A

Feeder current up to 630 A




Type of switchgear Factory-assembled, type-tested, metal-enclosed switchgearaccording to IEC 62271-200, modular and extendable,individual panels and panel blocks

Internal arc classification (option) IAC A FL/FLR 21 kA, 1 s

Dimensions

Panel width according to panel type 430 mm, 500 mm

Panel height 1600 mm (without low-voltage compartment)

Panel depth 920 mm

8DJH 36

Configuration examples

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Cable feeder - Auxiliary switch at the three-position switch

- Intelligent short-circuit/ ground fault direction indicatorwith associated current and voltage sensorsSiemens SICAM FCM

Transformer feederwith switch-disconnector/

fuse combination

- Auxiliary switch at the three-position switch

- Signaling switch “HV HRC fuse tripped“

Transformer feederwith circuit-breaker

- Auxiliary switch at the circuit-breaker


- Definite-time overcurrent protection Siemens SIPROTEC

Remote terminal unit - Remote terminal unit as compact unitSiemens SICAM CMIC

- Remote terminal unit with extension modulesfor binary inputs/outputs Siemens SICAM CMIC,optionally SICAM EMIC

Communication modem - Mobile communication (GPRS, UMTS),e.g. Siemens SCALANCE M

- WiMax, e.g. RUGGEDCOM WIN

- Broadband/ high-speed powerline, e.g. MV200

- Fiber optic, e.g. Siemens SCALANCE X

- xDSL (ADSL, SHDSL), e.g. Siemens SCALANCE M

Uninterruptiblepower supply

- Siemens SITOP power supply units

- Siemens DC-UPS SITOP UPS1600 with battery modules

- Siemens DC-UPS SITOP UPS500S with capacitors

1. Monitoring

Configuration

2. Telecontro

Configuration

for intelligent transformer substations

M V s w i t c h g e a r

Cable feeder


fuse combination


Remote terminal unit

Communication modem


Cable feeder


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Configuration

iliary switch at the three-position switch

lligent short-circuit/ ground fault direction indicatorh associated current and voltage sensorsmens SICAM FCM


naling switch “HV HRC fuse tripped“

iliary switch at the circuit-breaker


nite-time overcurrent protection Siemens SIPROTEC

mote terminal unit as compact unitmens SICAM CMIC

mote terminal unit with extension modulesbinary inputs/outputs Siemens SICAM CMIC,onally SICAM EMIC

bile communication (GPRS, UMTS),Siemens SCALANCE M

Max, e.g. RUGGEDCOM WIN

adband/ high-speed powerline, e.g. MV200

er optic, e.g. Siemens SCALANCE X

L (ADSL, SHDSL), e.g. Siemens SCALANCE M

mens SITOP power supply units

mens DC-UPS SITOP UPS1600 with battery modules

mens DC-UPS SITOP UPS500S with capacitors

or control unit for easy activation of theconnecting“ function of the three-position switch,

mens MCU RI

or control unit for two-pole switching of theconnecting“ function of the three-position switch/or switching of the “earthing“ function,mens MCU-MH

or control unit for activation of the three-positiontch via Modbus-RTU, Siemens MCU-MH-MOD

Cable feeder - Auxiliary switch at the three-position switch

- Intelligent short-circuit/ ground fault direction indicatowith associated current and voltage sensorsSiemens SICAM FCM


fuse combination


- Signaling switch “HV HRC fuse tripped“


- Auxiliary switch at the circuit-breaker


- Definite-time overcurrent protection Siemens SIPROTEC

Remote terminal unit - Remote terminal unit as compact unitSiemens SICAM CMIC

- Remote terminal unit with extension modulesfor binary inputs/outputs Siemens SICAM CMIC,optionally SICAM EMIC

Communication modem - Mobile communication (GPRS, UMTS),e.g. Siemens SCALANCE M

- WiMax, e.g. RUGGEDCOM WIN

- Broadband/ high-speed powerline, e.g. MV200

- Fiber optic, e.g. Siemens SCALANCE X

- xDSL (ADSL, SHDSL), e.g. Siemens SCALANCE M


- Siemens SITOP power supply units

- Siemens DC-UPS SITOP UPS1600 with battery modules

- Siemens DC-UPS SITOP UPS500S with capacitors

Cable feeder - Motor control unit for easy activation of the“disconnecting“ function of the three-position switch,Siemens MCU RI

- Motor control unit for two-pole switching of the“disconnecting“ function of the three-position switchand/or switching of the “earthing“ function,Siemens MCU-MH

- Motor control unit for activation of the three-positionswitch via Modbus-RTU, Siemens MCU-MH-MOD

Power meter andpower quality recorder

- Multifunctional measuring device for acquisitionof power quality measurands in the low-voltagedistribution grid, together with the associatedcurrent transformers, SICAM P850/855

Regulateddistribution transformer

- Regulated distribution transformer accordingto the existing high and low voltage or power,Siemens FITformer® REG

Regulation algorithmsand software components

- Control and regulation software


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Intelligent transformer substation version

with the RTU in the low-voltage

compartment of the switchgear

SICAM EMIC installed in thelow-voltage compartment on topof the 8DJH switchgear

The solution

In order to install the RTU in a space-saving wayinside the existing substation building withouthaving to change to a bigger substation type,there is the following possibility:The 8DJH is planned with a switchgear height of1200 mm instead of the normal 1400 mm,and the RTU is integrated in the 200 mm highlow-voltage compartments mounted on the top.

In this way, the overall switchgear height of1400 mm remains.


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with the RTU in a separate RTU cubicle

SICAM MIC installed in a separateRTU cubicle inside the transformersubstation

The solution

For retrofitting or to clearly divide competenciesbetween the grid operation and the telecontrol depart-ments, the version with the RTU in a separate RTUcubicle is particularly suitable. For this purpose, theRTU cubicle is placed in a separate telecontrol area ofthe transformer substation, and connected to themedium-voltage switchgear via a plug-in connection.This solution also allows an easy replacement of thewhole RTU cubicle at the end of the service life.

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with the RTU integrated in the switchgear

SICAM CMIC integratedin the front operatingmechanism of the trans-former feeder of the 8DJH

The solution

In order to design intelligent transformersubstations in an especially compact andspace-saving way, the version with the RTUintegrated in the front operating mechanism ofthe 8DJH is particularly suitable.


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Published by and copyright © 2013:Siemens AGWittelsbacherplatz 280333 Munich, Germany

Siemens AGInfrastructure & Cities Sector

Low and Medium Voltage DivisionMedium Voltage & SystemsMozartstr. 31 C91052 ErlangenGermanywww.siemens.de/mediumvoltage

For more information,please contact ourCustomer Support Center.Tel.: +49 180 524 84 37Fax: +49 180 524 24 71(Charges depending on provider)E-mail: [email protected]

Low and Medium Voltage DivisionOrder No. IC1000-G320-A177-X-7600Printed in GermanyWS 1013 WU 5.0 74/48637

Printed on elementary chlorine-free bleached paper.

All rights reserved.Trademarks mentioned in this document are theproperty of Siemens AG, its affiliates, or theirrespective owners.

For all products containing OpenSSLIT safety functions, the following applies:This product includes software developed by theOpenSSL Project for use in the OpenSSL Toolkit(www.openssl.org).This product includes cryptographic softwarewritten by Eric Young ([email protected]).

Subject to change without prior notice.The information in this document contains generaldescriptions of the technical options available,which may not apply in all cases.The required technical options should thereforebe specified in the contract for the individual case.

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