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CSR
Safety Power Supply
Safety Power Supply
Heavy Pressure on Supplying Safe & Reliable Electricity
With fast growth of China’s economy and society, demand of electricity increased dramatically, and peak
power load repeatedly setting new highs. The maximum peak power load of North China Power Grid and East
China Power Grid of SGCC both recorded more than 100 GW in 2006.
The power grid development is comparatively lagging behind economic development, the power grid
network structure is weak, and the investment in power grid construction is insufficient. Total investment
of electric power grid in China only accounted for 30% of the total investment of electric power sector, which
was far behind developed countries in which the ratio was 50% and above.
Large numbers of new generation units were put into operation while the task of power grid construction
was under severe strain. In 2006, the total newly installed capacity in China was over 100 GW which was
more than the total installed capacity of UK at present. It is a difficult task to perfect power transmission and
accomplish the grid construction in a short period of time.
Ratio Chart of Investments in
Power Generation and Power Grid
US
UK
Japan
France
China
47
45
46
31
70
Generation
53
55
54
69
30
Grid
Newly Installed Capacity in SGCC Service Area
10000
8000
6000
4000
2000
Unit: 10 MW
3683.7
5912.9
8264.9
2004 2005 2006
Risks Existing in Power Grid Safety
In recent years, large-scale blackouts occurred consecutively in the US, Canada and Europe, severely affecting
local economies and societies. These blackouts fully showed the importance of Safe and stable operation of
power grids. Under instructions of the State Council, SGCC would learn lessons from blackouts in other countries
and take effective measures in time to prevent accidents.
Frequent natural disasters affect grid safety. In 2006,
successive landings of Typhoon Pearl, Typhoon Bilisi, Typhoon
Kaemi and the 17 degree Typhoon Saomai challenged the
Stable and Safe operation of power grids.
Equipment damages caused by external factors affect
grid safety. Power equipment accidents caused by external
factors accounted for 20% of the total in 2006.
Grid-plant coordination was of great importance
to system safety. The generation and consumption of
electricity should achieve real-time balance. The power safety
management is facing new challenges after the separation of
power grids and power plants.
Ratio Chart of Grid Faults
Caused by Bad Weathers
Wind
Flashover
Ice Coating
Lightening
Flashover
Others
Pollution Flashover
Maximum Peak Power Load of
Major Power Grids of SGCC(2006)
12000
10000
10061
10661
Unit: 10MW
8000
6000
6375
4000
2000
3333
2290
0
North
China
East
China
Central
China
Northeast
China
Northwest
China
Ensure Safe and Reliable Power Supply for the “Two National
Conferences”(the National People’s Congress and the Chinese
People’s Political Consultative Conference)
Ensure Safe and Reliable Power Supply for the Newly Built
Qinghai-Tibet Railway
Ensure Safe and Reliable Power Supply for the Beijing Summit
of the Forum on China-Africa Cooperation
26
2006 Corporate Social Responsibility Report of SGCC www.sgcc.com.cn 27