auto_volt
2
132 KV BUS 1 132KV BUS 2 11 KV BUS SECTION TYPICAL AVC SCHEME FOR 132/11 KV TRANSFORMER BAY E02 E06 METERING E02 BCU O L T C WORK STATIONS LDC E02Q1 BUS DISCONNECT E02Q0 CIRCUIT BREAKER E02Q9 DISCONNECT E02Q8 EARTH SWITCH K09Q0 CIRCUIT BREAKER K09Q1 DISCONNECT K09Q8 EARTH SWITCH R,Y,B,N CURRENTS BUS1 BUS2 R,Y,B VOLTAGES R-Y Ph-Ph 11 KV Ref. Voltage TO EO2 BCU DNP3/UDP/IP REDUND. LAN E02Q2 BUS DISCONNECT 132/11 KV T1 A V C N O D E 2 C O M M U N I C A T I O N P R O C E S S O R D 2 0 0 STATUS & ALARMS TAP RAISE / LOWER TAP POSITION INDICATION 0-10 mA CONTROLS STATUS & ANALOG VALUES A Aut toma a t t i ic V Vol l t tag ge C Cont t r r ol l Automatic voltage control heightens system efficiency and power quality by automatically monitoring and controlling busbars, transformers, and tertia ry reactors. On a power dist ribution system e xperiencing varying loading conditions, this sophisticated substation automation application can effectively maintain a steady transformer secondary voltage (LV) within preset limits . This highly intelligent tap change control mechanism regulates LV voltage by: Automatically balancing load across connected transformers Continuously monitoring busbar and tertiary reactor connections Dynamically reacting to changes in switching arrangements Providing line drop voltage compensation due to load current Predicting the effect of a LV transformer tap on the voltage level Dy yna ami c c V Vo ol t t a ag ge e R Reg gulat ti o on This voltage regulation scheme is flexible and scalable to accommodate a range of transmission and distribution system topographies – up to 16 transformers across four busbars. The autom atic voltage control (AVC) software operates on a D200 substation control system, typically located in the substation control building. The D200 polls distributed input/output panels (or GE D25 multifunction IEDs) located at designated transformer on-load tap changers for status informati on. The AVC application computes a regulated transformer output voltage based on the transformers’ current measured voltage and loading conditions. It then issues controls to the distributed panels to raise or lower the transformers’ tap positions as necessary to obtain a voltage that is closest to the programmed voltage targets. Ideal in unmanned substations, the AVC scheme runs independently to provide safe parallel operation of transformers. The AVC application recognizes all switchgear connected to reactors, busbars and transformers. It polls the switchgear connected to the secondary windings to select logical groups for the transformers. Transformer groups are controlled through monitoring the voltage and MVARs associated with each transformer. The available tapping methods (voltage control, tap stagger and tap patterning) depends on the number of transformers in the group. Fault and alarm details, site information, transformer and switchgear displays are available to the system operator through a local user interface and/or the remote master station. I Int t e egr r a al l P Par r t t of f a a S Sub bst t a at t i ion A Aut t o oma at t i ion P Pr r ogr r a am As a component of a GE substation control system, the automatic voltage control application offers the security, reliability and flexibility inherent to GE substation automation platforms. Implementing automatic voltage control also brings the following benefits: Decreased system losses by minimizing voltage fluctuation and out-of-limit operation Extended life of older primary equipment by optimizing functionality Reduced space requirements by eliminating the automatic tap changer control panel.
-
Upload
agolbabaei -
Category
Documents
-
view
217 -
download
0
Transcript of auto_volt
7/27/2019 auto_volt
http://slidepdf.com/reader/full/autovolt 1/2
132 KV BUS 1
132KV BUS 2
11 KV BUS SECTION
TYPICAL AVC SCHEME FOR 132/11 KV TRANSFORMER BAY E02
E06
METERING
E02 BCU
O
L
T
C
WORK
STATIONSLDC
E02Q1
BUS
DISCONNECT
E02Q0
CIRCUIT
BREAKER
E02Q9
DISCONNECT
E02Q8
EARTH
SWITCH
K09Q0
CIRCUIT
BREAKER
K09Q1
DISCONNECT
K09Q8
EARTH
SWITCH
R,Y,B,N
CURRENTS
BUS1 BUS2R,Y,B VOLTAGES
R-Y Ph-Ph
11 KV Ref. Voltage
TO EO2BCU
DNP3/UDP/IP
REDUND. LAN
E02Q2
BUS
DISCONNECT
132/11 KV
T1
A V C
N O D E 2
C O M M U N I C A T I O N
P R O C E S S O R
D 2 0 0
STATUS & ALARMS
TAP RAISE / LOWER
TAP POSITION INDICATION
0-10 mA
CONTROLS
STATUS &
ANALOG VALUES
AAuuttoommaattiicc VVoollttaaggee CCoonnttr r ooll
Automatic voltage control heightens system efficiency and power quality by automatically monitoring and controlling
busbars, transformers, and tertiary reactors. On a power distribution system experiencing varying loading conditions, this
sophisticated substation automation application can effectively maintain a steady transformer secondary voltage (LV) within preset limits.
This highly intelligent tap change control mechanism regulates LV voltage by: Automatically balancing load across connected transformers
Continuously monitoring busbar and tertiary reactor connections Dynamically reacting to changes in switching
arrangements
Providing line drop voltage compensation due to load
current
Predicting the effect of a LV transformer tap on the
voltage level
DDyynnaammiicc VVoollttaaggee RReegguullaattiioonn
This voltage regulation scheme is flexible and scalable toaccommodate a range of transmission and distribution
system topographies – up to 16 transformers across four
busbars. The automatic voltage control (AVC) software
operates on a D200 substation control system, typicallylocated in the substation control building. The D200 polls
distributed input/output panels (or GE D25 multifunction
IEDs) located at designated transformer on-load tapchangers for status information. The AVC application
computes a regulated transformer output voltage based on
the transformers’ current measured voltage and loadingconditions.It then issues controls to the distributed panels to raise or
lower the transformers’ tap positions as necessary to
obtain a voltage that is closest to the programmed
voltage targets.
Ideal in unmanned substations, the AVC scheme runs independently to provide safe parallel operation of transformers.
The AVC application recognizes all switchgear connected to reactors, busbars and transformers. It polls the switchgear connected to the secondary windings to select logical groups for the transformers. Transformer groups are controlled
through monitoring the voltage and MVARs associated with each transformer. The available tapping methods
(voltage control, tap stagger and tap patterning) depends on the number of transformers in the group.
Fault and alarm details, site information, transformer and switchgear displays are available to the system operator through a local user interface and/or the remote master station.
IInntteeggr r aall PPaar r tt oof f aa SSuubbssttaattiioonn AAuuttoommaattiioonn PPr r ooggr r aamm
As a component of a GE substation control system, the automatic voltage control application offers the
security, reliability and flexibility inherent to GE substation automation platforms. Implementing automaticvoltage control also brings the following benefits:
Decreased system losses by minimizing voltage fluctuation and out-of-limit operation
Extended life of older primary equipment by optimizing functionality Reduced space requirements by eliminating the automatic tap changer control panel.
7/27/2019 auto_volt
http://slidepdf.com/reader/full/autovolt 2/2
gGE Energy Services
General Electric Canada Inc.
2728 Hopewell Place N.E.
Calgary, Alberta T1Y 7J7
Canada
Tel: 403.214.4400
Fax: 403.243.1815
© 2002, General Electric Canada Inc. All rights reserved. The contents of this document are the property of General Electric Canada Inc. No part of this work may be reproduced or
transmitted in any form or by any means, except as permitted in written license agreement with General Electric Canada Inc. General Electric Canada Inc. has made every reasonable
attempt to ensure the completeness and accuracy of this document. However, the information contained in this document is subject to change without notice, and does not represent
a commitment on the part of General Electric Canada Inc.
GEA-13287 Printed in Canada
AAuuttoommaattiicc VVoollttaaggee CCoonnttr r ooll FFeeaattuur r eess
Platforms
D200 substation control system
Implementations/attributes supported
Maximum four busbars
Maximum 16 transformers (four per busbar)
Positive resistance compounding factors (per busbar) Negative/positive reactance compounding factors (per busbar)
Busbar priorities
Switchgear connectionsExistence of ARS system
Homing enable/disable
Voltage target increase gradient (expressed as kV per minute)
Functions
Dynamically determine site topographyControl transformers in parallel, tap stagger or tap pattern
operation
Control transformers connected to remote LV busbars
Maintain voltage of LV busbars at preset values
Automatically select and control transformer groupsCoordinate tap changes
Compensate for resistive and reactive elements
Detect faults and report alarms.
Maintain voltage limits for single fault conditionsSupervise control commands
Detect and respond to hunting or unexpected taps
Features
Configurable substation topographyConfigurable transformer attributes
Selectable voltage targets
Busbar in/out control switch
Switchable automatic or manual controlFault list display
AVC/ transfomer status display
Standing fault display
Alarm display (PowerLink)Clear fault list button (PowerLink)
Interfaces Supported
On-load tap changer
Remote master stationLocal/remote workstation
Bay control units/peripheral control boardsWesmaint
Delayed auto-reclosers
Options
Local/remote PowerLink GUI
Tap stagger on/off switch
