1. POWER GRID INTERCONNECTIONS IN CHINA 2001-2002
Xiaoxin Zhou
China Electric Power Research Institute
May 6, 2002
Shenzhen, China

2. 中国电网的现状-1 Power Industry in China -1
到2001年底: 发电装机容量达3.38亿千瓦
发电量完成14780亿千瓦时
By the end of 2001:
installed capacity: 338GW
Electricity generation: 1478 TWh
Comparing with 2000:
319GW (5.9%)， TWh (8.2%)
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3. 中国电网的现状-2 Power Industry in China-2
35kV及以上线路总长度达762000公里
其中500kV线路31394公里
330kV线路8669公里
220kV线路134875公里
The total length above 35kV :762,000km
500kV : 31,394 km
330kV : 8,669 km
220kV : 134,875 km
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4. 中国电网的现状-3 Power Industry in China -3
已形成: 7个跨省(区)电网;东北、华北、华东、华中、 西北、南方和川渝, 5个独立省级电网:山东、福建、新疆、海南、西藏 (未包括台湾和港澳地区)
7 Regional power networks:
Northeast China,
North West China
North China
East China
Central China
South China
Chuanyu
5 provincial power
networks:
Shandong,
Fujian,
Xinjiang,
Hainan,
Tibet
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5. Power network in China 500kV 330kV 220kV Power network coverage 96.4%
Northeast
Xinjiang
North
500kV
220kV
330kV
Thermal
Plant
Hydro
Nuclear
North west
Tibet
East
Central
Sichyu
South
Power network coverage 96.4%
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6. 中国电网发展战略规划 Strategic planning for Network
我国的发电一次能源主要分布西部地区，而电力消费主要集中在中、东部和南部地区。西电东送、南北互供，发展全国联网是解决我国能源分布与电力消费矛盾的重要措施。并将形成北、中、南三个输电通道。
In China, energy resource is mainly scattered in the west, consumption is concentrated in Central, East and South china.
“Transmitting power from west to east, exchange between south and north and enhance nationwide interconnection”
Three corridors will be constructed in North, Central and South China.
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7. Power transmission from The West to the East: Three transmission corridors
North corridor
Central Corridor
The capacity of each corridor will reach about 20GW in 2020.
South Corridor
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8. 北通道 The North corridor Northeast, North, Shandong, Northwest
北通道送电距离大多在1000公里以内，输电方式以交流输电为主；要关注的主要技术问题是系统稳定问题和采取提高电网输电能力的技术措施。
Northeast, North, Shandong, Northwest
Distance:﹤1000km ;
Mainly by AC transmission;
Faced:
System stability
Improving Capability
Right of way
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9. 中通道 The Central corridor
中通道送电距离在1000~2200公里，将以直流输电为主，要关注的主要技术问题有：直流多落点、电压稳定和动态稳定以及输电走廊紧张等问题。
East china, Central China, Chuanyu, Fujian
Distance:1000~2200km ;
Mainly by DC transmission;
Faced:
Multi HVDC feeder Problem(6 inverters in ECPN)
Dynamic and Voltage stability
Right of way
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10. 南通道 The South corridor Guangdong, Guangxi, Guizhou, Yunnan,Hainan
南通道送电距离在1000~1500公里，采用交直流混合输电方式；要关注的主要技术问题有：暂态稳定问题、直流多落点问题以及提高输电能力等。
Guangdong, Guangxi, Guizhou, Yunnan,Hainan
Distance:1000~1500km ;
AC+DC transmission;
Faced: Multi feeder Problem
System stability
Improving Capability
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11. Interconnection projects (2001-2002)
North China – Northeast China
one circuit of 500kV AC line, 600MW-800MW,
May, 2001
Fujian – East China
one circuit of 500kV AC Line, 600MW
October,2001
Chuanyu – Central China
October, 2001
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12. Interconnection Fujian-East China
Interconnection North-Northeact
May,2001
Interconnection Chuanyu-Central China
April,2002
Interconnection Fujian-East China
October,2001
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13. Transmission projects (2001-2002)
Three Gorges transmission projects: AC and DC under construction
10,000MW Transmission project from the West to Guangdong: AC and DC
750kV transmission project in Northwest passed the feasibility study assessment
Others
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14. Regional Grids Interconnection in 2005
Thermal Base
3000MW
2500MW
1800MW
7200MW
Hydro Power Base
10000MW
9000MW
This is a sketch map for nationwide interconnection in 2010.
The power deficits in NEPN will be mainly filled up by the Humeng’s thermal base. NEPN is to be connected with NCPN to obtain interconnection benefits. NCPN and NWPN will be probably interconnected along with the development of "Sanxi" thermal power base. In the same time, it will strengthen interconnection between NCPN, NWPN NEPN and Shangdong as well as ECPN and CCPN. Also, it will be possible that Northeast China power system will be imported electricity from Russia.
The TGPG will make CCPN, ECPN, CYPG as well as NCPN interconnect. In future, TGPG will be interconnected with Southern China Interconnected Network to obtain trans valley compensation benefit.
A ±500kV HVDC line is planned to be built in order to transmit thermal power from Shanxi to Sichuan. FJPN will be interconnected with ECPN to save reserve of generation. Shaanxi in NCPN will supply thermal power to SDPG.
When all planned interconnection projects are completed, most of regional and provincial power grids will be interconnected and a nationwide interconnected grid will be basically established.
2000MW
3000MW AC DC
Regional Grids Interconnection in 2005
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15. China experiences on grid interconnection operation-1
Benefits by grid interconnection, from technical and economical point of view
Low frequency oscillations
Reduce transient stability limit
DC and AC/DC interconnection
Central China – East China by DC
South China: AC/DC
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16. China experiences on grid interconnection operation-2
Comparative large generation unit in power system causes operation problems:
Trip 1000MW nuclear unit in early 1990’s Gondong power grid caused loss of stability of South China interconnected power system
600MW thermal units in Fujian power grid requires interconnection with East China Power Grid in order to avoid frequency and voltage instability
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17. Regional Grids Interconnection in 2010
Thermal Base
3000MW
2500MW
1800MW
7200MW
Hydro Power Base
10000MW
9000MW
This is a sketch map for nationwide interconnection in 2010.
The power deficits in NEPN will be mainly filled up by the Humeng’s thermal base. NEPN is to be connected with NCPN to obtain interconnection benefits. NCPN and NWPN will be probably interconnected along with the development of "Sanxi" thermal power base. In the same time, it will strengthen interconnection between NCPN, NWPN NEPN and Shangdong as well as ECPN and CCPN. Also, it will be possible that Northeast China power system will be imported electricity from Russia.
The TGPG will make CCPN, ECPN, CYPG as well as NCPN interconnect. In future, TGPG will be interconnected with Southern China Interconnected Network to obtain trans valley compensation benefit.
A ±500kV HVDC line is planned to be built in order to transmit thermal power from Shanxi to Sichuan. FJPN will be interconnected with ECPN to save reserve of generation. Shaanxi in NCPN will supply thermal power to SDPG.
When all planned interconnection projects are completed, most of regional and provincial power grids will be interconnected and a nationwide interconnected grid will be basically established.
2000MW
3000MW
Possible International
connection AC AC DC
Regional Grids Interconnection in 2010
2018/12/7
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18. Regional Grids Interconnection in 2015-2020
Thermal Base
3000MW
2500MW
1800MW
7200MW
Hydro Power Base
10000MW
9000MW
This is a sketch map for nationwide interconnection in 2010.
The power deficits in NEPN will be mainly filled up by the Humeng’s thermal base. NEPN is to be connected with NCPN to obtain interconnection benefits. NCPN and NWPN will be probably interconnected along with the development of "Sanxi" thermal power base. In the same time, it will strengthen interconnection between NCPN, NWPN NEPN and Shangdong as well as ECPN and CCPN. Also, it will be possible that Northeast China power system will be imported electricity from Russia.
The TGPG will make CCPN, ECPN, CYPG as well as NCPN interconnect. In future, TGPG will be interconnected with Southern China Interconnected Network to obtain trans valley compensation benefit.
A ±500kV HVDC line is planned to be built in order to transmit thermal power from Shanxi to Sichuan. FJPN will be interconnected with ECPN to save reserve of generation. Shaanxi in NCPN will supply thermal power to SDPG.
When all planned interconnection projects are completed, most of regional and provincial power grids will be interconnected and a nationwide interconnected grid will be basically established.
2000MW
3000MW
Possible International
connection AC DC
Regional Grids Interconnection in
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19. Reform of China power industry
A market- oriented reform program of China power industry has been approved by State Council
Separating traditional monopolized power company into power generation company and power grid company
Pool style regional power market with competition of power generation companies
State Power Grid Company and South China Power Grid Company
4-5 power generation group companies
One year procedure of the first stage reform
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20. State Power Grid Company
South China Power Grid Company
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21. Thank you!
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