Siemens MV Drives

1

a presentation by

Trends in MV Drive systems

SIMOVERT DRIVE SYSTEMS

PRODUCT OVERVIEW

MASTERMASTER--DRIVESDRIVES

45 - 1500 kW(4000 kW)

Air/water cooled

MVMV

550 - 3400 kW(7200 kW)

Low voltageinverters

230 - 690 V

Mediumvoltage

inverters2.3 kV / 3.3 kV / 4.16 kV / 6 kV /

6.6 kVAir/watercooled

SS

2500 - 100000 kW

DD

1500 - 100000 kW

Mediumvoltage

inverters1.0 - 23.0 kV

Air/water cooled

Mediumvoltage

inverters1.35 - 23.0 kV

Air /watercooled

2

Drive Systems - Basic Principles

• The Control System

Drive Systems 1

Drive Systems 2

The Driving Force

Examples

The Drive System

• Components

• The Power Section

• The Excitation System

Product Overview

• The Cooling System

Details / Drive Components

Conclusion

SIMOVERTMasterDrives SIMOVERT SSIMOVERT MV

Load CommutatedInverter (LCI)

Voltage SourceInverter (VSI)

SYMASM

IG ASM SYM

Circuit-breaker

Line-side rectifier

capacitors

Motor-side inverter

Squirrel-cage induction motor

Inverter transformer

Combined motor-side CT / PT

2.3...36 kV 3~ 50/60 Hz

IMwith medium-voltage winding

linkwith

DC

Sinusoidal EMCoutput filter (option)

Drive system components – voltage source

We take careof all drive components

3

Drive Systems Components – Current source

or

SM



Drive Systems 1

Drive Systems 2

Examples

The Drive System

• Components



Product Overview



Conclusion

Development Of The Power Components

sym.GTO

IGCT

Diode

LV-IGBT

Fit for the future: HV-IGBTs

Mercury-vapor rectifier

HV-IGBT

MOS-FETTransistor

TransistorBipolarTransistor

Thyristor

fast-

switching

Diode

asym.GTO

4

Progress of Power Semi-Conductors

technology andits propagation

60s 70s 80s 90s 00s

time

mercuryarc rectifier

silicondiode

fast switching diode

GTOIGCT

SGCT

LV-IGBT

HV-IGBT

bipolar transistors

thyristor

Index

Drive System Design

Principle of the 3-Level Inverter

Comparison 2-Level and 3-Level Inverter

SIMOVERT MV for6 / 6.6 kV

HV-IGBT

Comparison of Power Semiconductors

HV-IGBT Fit For The Future And Reliable

•• No No snubber snubber circuitrycircuitry! compact! modular! service-friendly

•• Intrinsically current limitingIntrinsically current limiting! no output filter! high reliability! short-circuit proof inverter

•• Can be simply gatedCan be simply gated! few power components! high reliability

IGBT HV-IGBTs - the optimum power semiconductor - the componentfor the future

We are technological pacemaker and market leader worldwide in the development

and production of HV – IGBTs (SIEMENS / EUPEC)

HV-IGBTs - the optimum power semiconductor - the componentfor the future

We are technological pacemaker and market leader worldwide in the development

and production of HV – IGBTs (SIEMENS / EUPEC)

5

Comparison Of Power Semiconductors

HV-IGBT GTO Hard-switching GTO(IGCT)

Low gating powerCan be simply gated,few power components

Current-limitingShort-circuit proofinverter without any additional circuitry

High gating powerComplex gating, many power components

Not current-limitingShort-circuit proofinverter only withadditional circuit (an output filter is required)

Absolutely no snubbercircuitry required

Snubber circuitryrequired

di/dt snubber circuitryrequired

High gating powerComplex gating, many power components

Not current-limitingShort-circuit proofinverter only withadditional circuitry (an output filter is required)

Leading-edge HV-IGBT - tested and well-proven

Control Characteristics of HV-IGBT and IGCT

HV-IGBTapprox.5A

approx.6000A/"s

Iload

IDG 4A

approx. 800 A

approx. 1000A/"s

gatecurrent

t ("s)

IGCT

• low turn-on and turn-off current• no on-state current in the

respective conditionsimple and reliable control!

approx.5A

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3-Level Medium-Voltage Inverter

M3~

+

-

DC linkLine-siderectifier

0

3-levelinverter

DC100 Hz

1 Hz

50/60 Hz

3-ph. 2.3 - 36 kV AC50/60 Hz

(+)

(0)

(0)

(–)(+)

Comparison, 2-Level / 3-Level Voltage-Source DC Link Converter

Ud

Phase-phase voltage U1

2-level inverter

3-level inverter

A

B

C

D

E

Ud

Load current0 5 10 15 20

load current

time[msec]

+

0

-

+

-

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3-Level Output Inverter

+

-

DC link

0

3-level inverter

L1 L2

L3L1

L2

L3

t1U1

V1

V2

V5

V6

Air or Water Cooling for all Ratings

air cooling

water cooling

HV-IGBT Power CardsIndex

Customer Benefits

Requirements

Product Overview

The Standard

All Branches

All Applications

Air or Water Cooling

Power Range

Supply Voltage

For all Motors

Basic Technical Figures

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Voltage Range in kW

2.3 kV 640 to 2040

3.3 kV 810 to 2560

4.16 kV 1070 to 7500

6.0 kV 550 to 1640

6.6 kV 550 to 1640

Simovert SCurrent source Converter


Conclusion

9

Drive Systems Components – Current source

or

SM



Drive Systems 1

Drive Systems 2

Examples

The Drive System

• Components



Product Overview



Conclusion

SIMOVERT S – Current source

Basic Power Circuitry

• simple design• only few components• extremely reliable and robust

maintenance-free, fuseless• isolated (ungrounded)• short-circuit proof • integrated dc link reactor• water or air-cooled• compact, complete• inherent 4-quadrant operation• world-wide tele-service via modem

SM


The Driving Force

Examples

The Drive System

• Components


Product Overview



Conclusion

10

SIMOVERT S

transformer

rectifier

electroniccommutator

SIMOVERT S

transformer

rectifier

electroniccommutator

DC Drive

transformer

rectifier

mechanicalcommutator

DC Drive

transformer

rectifier

mechanicalcommutator

Comparison SIMOVERT S - DC Drive


Drive Systems 1

Drive Systems 2

The Driving Force

Examples

The Drive System

• Components


Product Overview



Conclusion

Simovert S : Main Characteristics

• lowest number of components• most robust switching elements (thyristors)• highest efficiency• simple power section circuitry• fault tolerant (due to special dc link reactor arrangement®)• unlimited output power can be realized (above 100 MW)• easy to handle• no dV/dt stress on motor windings• inherent 4–quadrant operation• inherent ride-through capability of up to 3 sec blackouts• inherent immediate restart after power failure• safe and simple synchronization of large synchronous motors

(starting converter) last but not least:

longest experience - proven technique


Examples

• Components




Conclusion

11

Starting Sequence of a Starting Converter

SIMOVERT S STARTING CONVERTER

SE

parallelingunitPSG

Simadyn Dfor

soft-starterSD AUR

Simadyn Dfor

processcontrol

communi-cationSD AK

SErr

SNSA

SErr

SNSA

SM 2SM 1

12

parallelingunitPSG

excitationcontroller

SM 1

Simadyn Dfor

soft-starterSD AUR

Simadyn Dfor

processcontrol

communi-cationSD AK

CLOSE command to breaker

Drive Systems 1

SIMOVERT S STARTING CONVERTER - Starting Sequence

START command from PCS

CLOSE command to motor line breaker

Simadyn Dfor

soft-starterSD AUR

Simadyn Dfor

processcontrol

communi-cationSD AK

START command to soft starter

n

t

SM

motor is on line

OPEN command to breaker

SIMOVERT S


Drive Systems 1

Drive Systems 2

The Driving Force

Examples

The Drive System

• Components


Product Overview



Conclusion

High–Speed Gas Compressor Drive 65 MW

8 m

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• In waterworks and water treatment plants.- Pumps for drinking water recovery and water distribution plantsSlurry Pumps.

• In Oil and natural gas Industry.- Pumps and compressors.

• In Foodstuff Industry.- Centrifugal drives, Pumps, mixers, mills, Extruders.

• In Marine engineering.- Propeller drives, bow thrusters.

• In cement Industry.- Conveyor belt systems, blowers and crushers.

• In open pit mining- Conveyor belt systems, Vibrators, excavators, crushers

• In Power Utilities:- Pumps, blowers, coal crushers

Application Areas

Applications for Major Industry Sectors

Power Generation

•Induced Draft / Forced Draft Fan, Primary Air Fan•Boiler Feed Pump•Circulating Water Pump•Condensate ExtractionPump•Air Compressors•Coal Handling Plant•Ash Handling Plant

• Raw Mill Fan• Raw Electrostatic

Precipitator Fan• Preheater Fan• Calcinar Fan• Cement Mill Fan• Coal Mill Fan

Cement Steel

•Descaling Pump•Waste Gas Fan•Ladle Furnace Fan•Induced Draft Fanat LD Furnace•Crusher

• Pumps, Compressorsfor Cooling Tower, Heat Exchanger

• Induced Draft /Forced Draft Fan used in Distillation and Furnace area

• Pumps for pipelines

Petrochemicals/Fertilizers

Captive Power plants (CPP) for core sectors (mainly for CPPs >30MW )

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An optimum solution for

low rating MV motors

(<1 MW)

# There exists large installed base of motors of ratings 200KW & above in MV range in major industries

# Majority of these motors are utilised for fan & pump applications having good energy savings potential

# Big requirement of retrofitting these applications with VFD to achieve energy savings

# Offering MV drives for such low ratings is very uneconomical

Need for HLH Soultion

# H-L-H is ideal cost effective solution for such retrofit cases

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Υ

12-PulseRectifier

Inverter

OutputSine Filter

MMV/HV Motor

Step-DownTransformerkV/V

Step-UpTransformerV/kV Y

Schematic for HLH configuration

Υ

M

Step-Down Transformer11kV/1.7kV-1.7KV

Step-Up Transformer3.3kV/11kV

Y

VCB1

VCB2

3 Phase, 11kV, 50Hz

VCB3 (Bypass Breaker)

VCB0 (Existing)

3-Level Inverter with HV-IGBT’s

Incoming Rectifier DFEDiode Front End

3.3kV SIMOVERT MV Drive System

Single Line Schematic of Installed System

Siemens MV Drives

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