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Implementing a New Energy Management System
for the China Southern GridPresented at
10th International Workshop on Electric Power Control Centers
Hao WANGDispatching Center, CSG
June 2009
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China Southern Grid
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Overall System Control Hierarchy of CSG
Guangdong Province
Guangxi Province
YunnanProvince
GuizhouProvince
Hainan Province
ChinaSouthern
Grid
Areas Areas Areas Areas
Counties/Cities
Areas
Counties/Cities
Counties/Cities
Counties/Cities
Counties/Cities
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Configuration of CSG-EMS
Backup
System
人机交互网交换机#3#4
Three screens Dispatcher x4
B/WPrinters
Networked RTUs & PMUs
Development & Maintenance
Workstation x6
Historical Data Server
Operations Planning
Workstation x3
Network Switches
ReportsWorkstation x2
Wall Display Protection Workstation
SCADA/AGC Server
EMS Application Server
DSA Servers
Dispatching Data Network
5 Provincial EMS
Metering System& other LocalAutomation
Systems
Comms& ICCPServer
Front End & Data Gathering
Server
Serial RTUs
Dedicated Channel
CSG DTS
System
ColorPrinter
MgmtUsers
Web Hosting,Historical Mirror,
Reports
Web Server System
IndependentSystem Monitor
Disk Storage
5 Prov. DTS
System
Model MergingServer
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Modules of CSG-EMS
Data Bus
DB PI
SCADA EMS Analy.WAMS
DSA Visualization
Safe Area I
CSG Joint DTS
DB PI
WEB
Safe Area III
Safe Area II
Local DTS
R T U
P M U
I
C
C
P
Prov. EMS
Model Merging
L
F
O
D
S
E
D
P
F
C
A
N
S
O
P
F
AGC AVC
S
C
A
P
S
C Report
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Model Merging >> Concept
Major Challenge: database-updating requirement imposed by the fast growth of the CSG grid.
Capability of supporting frequent on-line database changes and power-system model updates.
Each of the provincial control center is responsible to update the data of its own EMS on a daily basis.
Conceptually, the full power system model for the entire CSG grid, used in the CSG-EMS, is a merged model of the five individual province-EMS’s models, with the boundary areas among the provinces properly represented and adjusted.
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Model Merging >> Procedure
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~
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Upload
YN GX GD
~
GZ
Merging
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Model Merging >> Result
Models exported from Province-EMS in CIM-XML format, together with exports of related display files in SVG format, as well as SCADA measurement-point definitions in ICCPdescription file.
Real-time data and displays from Province-EMS are kept up-to-date through ICCP link and SVG re-link.
The merged full model covers all the 500kV and 220kV devices in CSG grid. And it can be updated whenever there is a change in one or more Province-EMSs.
EMS analytical results become much more accurate. Besides, the full model could be shared with the province.
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Visualization Example 1
Generators’ loadings, and the transmission line flows.
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Visualization Example 2
Relative voltages of different buses by contour lines.
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Historical Data Recording and Recalling
Using a PI system, all 500kV and 220kV data, as well as PMU data are being recorded continuously.
Instead of event-drive or PDR, but a holographic storage of the historical data.
The historical data can be recalled through displays at any later time.
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Conclusion
The new Energy Management System for the China Southern Grid is a state-of-art system.
Several of its functional capabilities are pace-setting in China, and are comparable in the world.
Successful experience of applying CIM and SVG standards to exchange models and displays for a large power system.
CSG-EMS has been installed and put into operation in the CSG control center in Guangzhou, China.
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Thanks !
Hao WANG Automation Division, Dispatching Center, CSG
Wenfeng ZHANGDeputy Director, Dispatching Center, CSG