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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

China Southern Grid

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

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

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

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.

Model Merging >> Procedure

~

~

~

Upload

YN GX GD

~

GZ

Merging

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.

Visualization Example 1

Generators’ loadings, and the transmission line flows.

Visualization Example 2

Relative voltages of different buses by contour lines.

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.

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.

Thanks !

Hao WANG Automation Division, Dispatching Center, CSG

wanghao@csg.cn

Wenfeng ZHANGDeputy Director, Dispatching Center, CSG

zhangwf@csg.cn