According to the “Twelfth Five-Year†development plan of the State Grid Corporation of China, during the “Twelfth Five-Year Plan†period, the State Grid Corporation of China will vigorously develop the UHV power grid. As the major load center in North China, Beijing will benefit from UHV power grids. By then, an extra-high voltage substation will be completed in the eastern part of Beijing to further optimize the passage of external power into Beijing, enhance the transmission capacity of foreign power into Beijing, increase the power supply voltage level, and meet the load requirements in Beijing.
Beijing Power Grid is the main load center of the North China Power Grid and is responsible for the important task of supplying power to the capital. In recent years, with the rapid and steady growth of Beijing's economy and the continuous improvement of residents' living standards, demand for electricity in Beijing has also grown rapidly. During the “Eleventh Five-Year Plan†period, the average annual growth rate of the capital grid load is about 9%, and the maximum load increased from 10.65 million kilowatts in 2005 to 16.66 million kilowatts in 2010. The total social electricity consumption in Beijing was from 570.54 in 2005. The increase from 100 million kWh to 71.584 billion kWh in 2010 is expected to increase the average annual growth rate of Beijing power grid to 10.14% during the 12th Five-Year Plan period, and the final maximum load will reach 27 million kW.
Due to the constraints of regional political economy and geographical environment, during the “11th Five-Year Plan†period, the local power supply of Beijing Power Grid is relatively low, and it still depends on the external power supply support in Shanxi, Mengxi, and Zhangjiakou, and is a typical receiver-side power grid, and the ratio of external power reception. It will remain around 70% for a long time. The traditional single power-receiving method is not conducive to the stable and reliable operation of the power grid, and cannot meet the increasing power load demand in Beijing. It is necessary to speed up the construction of UHV power grids and greatly increase the power capacity of the Beijing power grid so as to achieve sufficient and reliable power supply in Beijing. To maintain regional electricity balance.
The “12th Five-Year Plan†will be an important stage for the development of UHV power grids in China. Based on UHV AC pilot demonstration projects, the State Grid will accelerate the construction of the “Three Chinas†UHV AC synchronous power grid in North China, Central China, and East China. According to the plan, in 2015, the "Three Chinas" UHV power grid formed a "three vertical and three horizontal and one ring network", and Ximeng, Mengxi, Zhangbei and Northern Shaanxi energy bases passed three vertical UHV AC channels to "Three Chinas". Transmission, northern coal-fired power, southwest hydropower through three horizontal UHV AC channel to North China, Central China and Yangtze River Delta UHV ring transmission.
At that time, a 1000-kV high-voltage station will be located in the eastern area outside Beijing as part of the link between the “Eastern†channel of the UHV power grid and the Ximeng-Nanjing exchange channel. The abundant coal power resources of the Ximeng coal-fired power station will pass. The station transports about 2 million kilowatts of power for Beijing, greatly increasing the load carrying capacity of the Beijing power grid and meeting the demand for rapid regional load growth.
At present, Beijing has 9 500-kilovolt substations. The 500-kilovolt power grid has sufficient capacity to carry external power. However, subject to the external energy transmission level, it is unable to give full play to the large-capacity advantages of the 500-kilovolt power grid; An important part of the delivery is that the power supply is connected centrally to the 500 kV power grid in the west, and the unbalanced power capacity of the 500 kV power grid between east and west is also a real problem that affects the development of the Beijing power grid. The access of UHV grid power supply will effectively ease the imbalance in the development of electricity in Beijing.
Beijing Power Grid is the main load center of the North China Power Grid and is responsible for the important task of supplying power to the capital. In recent years, with the rapid and steady growth of Beijing's economy and the continuous improvement of residents' living standards, demand for electricity in Beijing has also grown rapidly. During the “Eleventh Five-Year Plan†period, the average annual growth rate of the capital grid load is about 9%, and the maximum load increased from 10.65 million kilowatts in 2005 to 16.66 million kilowatts in 2010. The total social electricity consumption in Beijing was from 570.54 in 2005. The increase from 100 million kWh to 71.584 billion kWh in 2010 is expected to increase the average annual growth rate of Beijing power grid to 10.14% during the 12th Five-Year Plan period, and the final maximum load will reach 27 million kW.
Due to the constraints of regional political economy and geographical environment, during the “11th Five-Year Plan†period, the local power supply of Beijing Power Grid is relatively low, and it still depends on the external power supply support in Shanxi, Mengxi, and Zhangjiakou, and is a typical receiver-side power grid, and the ratio of external power reception. It will remain around 70% for a long time. The traditional single power-receiving method is not conducive to the stable and reliable operation of the power grid, and cannot meet the increasing power load demand in Beijing. It is necessary to speed up the construction of UHV power grids and greatly increase the power capacity of the Beijing power grid so as to achieve sufficient and reliable power supply in Beijing. To maintain regional electricity balance.
The “12th Five-Year Plan†will be an important stage for the development of UHV power grids in China. Based on UHV AC pilot demonstration projects, the State Grid will accelerate the construction of the “Three Chinas†UHV AC synchronous power grid in North China, Central China, and East China. According to the plan, in 2015, the "Three Chinas" UHV power grid formed a "three vertical and three horizontal and one ring network", and Ximeng, Mengxi, Zhangbei and Northern Shaanxi energy bases passed three vertical UHV AC channels to "Three Chinas". Transmission, northern coal-fired power, southwest hydropower through three horizontal UHV AC channel to North China, Central China and Yangtze River Delta UHV ring transmission.
At that time, a 1000-kV high-voltage station will be located in the eastern area outside Beijing as part of the link between the “Eastern†channel of the UHV power grid and the Ximeng-Nanjing exchange channel. The abundant coal power resources of the Ximeng coal-fired power station will pass. The station transports about 2 million kilowatts of power for Beijing, greatly increasing the load carrying capacity of the Beijing power grid and meeting the demand for rapid regional load growth.
At present, Beijing has 9 500-kilovolt substations. The 500-kilovolt power grid has sufficient capacity to carry external power. However, subject to the external energy transmission level, it is unable to give full play to the large-capacity advantages of the 500-kilovolt power grid; An important part of the delivery is that the power supply is connected centrally to the 500 kV power grid in the west, and the unbalanced power capacity of the 500 kV power grid between east and west is also a real problem that affects the development of the Beijing power grid. The access of UHV grid power supply will effectively ease the imbalance in the development of electricity in Beijing.
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