15
WAMS in China Jingtao Wu [email protected] Beijing Sifang Automation Co. Ltd 12 June 2007 Ullensvagen hotel, Norway
WAMS in China
Jingtao [email protected]
Beijing Sifang Automation Co. Ltd12 June 2007
Ullensvagen hotel, Norway
Northeast
North
GuangdongGuizhou
Yunnan
Guanxi
Northwest
East
Hainan
Center
300GWgeneration
80GWgeneration
3000km
1000km
2000km
4000km
Power System in China
HVDC
HVDCHVDC
HK
Taiwan
Tibet
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
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
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
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
Event analysisFind the root cause of system events.
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％
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
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
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.
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
Simulation of HDVC supplement control
Adaptive control:Online recognize the oscillationAnd change controller parameters
Adaptive function OFF
Adaptive function ON
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
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
