WAMS in China - EPCC Workshop
Transcript of WAMS in China - EPCC Workshop
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WAMS in China
Jingtao [email protected]
Beijing Sifang Automation Co. Ltd12 June 2007
Ullensvagen hotel, Norway
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Northeast
North
GuangdongGuizhou
Yunnan
Guanxi
Northwest
East
Hainan
Center
300GWgeneration
80GWgeneration
3000km
1000km
2000km
4000km
Power System in China
HVDC
HVDCHVDC
HK
Taiwan
Tibet
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2003
2003
2002
2004
2005
2003
20052006
2006
2007
2007
2006
2006
2007
2006
2006
DC under construction(9)
DC realized(16)
PMU
2006
20062007
2007
2004
2007
2007
2007
2007
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PMU increment / year
35
50
80
180
2003 2004 2005 2006
year
More than400 PMU will be installed in the end of 2007
More than 12 million $ investment
2007(Feb-March)
PMU locationSubstaion:All 750kV All 500kVPart 330kVPart 220kV
Generator:All 600MWPart 300MW
50
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Distributed measurement in substation
CSS-200/1PCSS-200/1G
CSFU-107 CSFU-107CSS-200/1ACSS-200/1ACSS-200/1A
Ethernet 100M
GPS Communication System
Data center
AC voltagesAC currents
Rotationpulse
PPS & Clock
25-100 Frames/s
Rotor AnglePhasor
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Data center in dispatching center
WAMSData center
EMSWarning
Special designed Real time DB to handle PMU data with timestamp refreshing 10-20ms
Special designed History DBto handle Huge data more than 1000GB
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Event analysisFind the root cause of system events.
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Simulation model analysis by artificial tests
In 2004 and 2005, northeast grid 500kV transmission line three phase to ground to investigate the load model.In 2007 , northwest grid 330kV transmission single line phase toground ,trip generators to testify new generation models and PSSperformance.
PSS off, Damp 5%
PSS on,Damp 9%
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Low frequency oscillation managementThere were lots of oscillation in past 3 years, WAMS become imperative to deal with the dangerous oscillation.
Assess osc. freq.and damping
Intelligent warning
Wide area control
Normal state
Under osc.
Under osc.
Power ocsillation
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Assessment of oscillationScan all transmitting power under normal state. If oscillation power > 10MW and duration > 5 oscillating cycles, the event is registered. Statistics shows: oscillation with poor damping will have more events.The assessment successfully predicts dangerous oscillation event before its real occurrence.
Osc.events distrubition
Real power -- Event
Freq. -- Event
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Intelligent warning during oscillation
Group coherent bus and
identify the oscillation
interface.
Sort contribution factors
of bus injeciton power to
indicate the dangerous
bus or generator.
Visualization of
oscillation distribution.
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WAMS based damping control
CSS-200/5M DC
CSS-200/5C
CSS-200/1CSS-200/1CSS-200/1PMU
CSS-200/5CController
RTDS center of China southern grid co.
HDVC
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Simulation of HDVC supplement control
Adaptive control:Online recognize the oscillationAnd change controller parameters
Adaptive function OFF
Adaptive function ON
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In futureIn data center: – WAMS and EMS will be combine with each other,
full dynamic EPCC will be realized – More response based application will be developed.
(others are model based analysis).In substation: – PMU and RTU will be replaced by new IED with
synchrophasor measurement function and supporting IEC 61850
1960s
EMS
2000s
EMS/WAMS
2020s
WAMS
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ReferenceWAMS Implementation in China and the Challenges for Bulk Power
System Protection. IEEE General Meeting June 24-28, 2007 , Tampa,
Florida, USA
Design and experiment of heuristic adaptive HVDC supplementary
damping controller based on online Prony analysis, IEEE General
Meeting June 24-28, 2007 , Tampa, Florida, USA
Advanced Low Frequency Oscillation Analysis Based on WAMS in a
Provincial Dispatching Centre. International Conference and
Exhibition Relay Protection and Substation Automation of Modern
EHV Power Systems, September 9-12, 2007, Moscow Russia