Talking about the Present Situation and Development Prospect of China’s Electric Power Industry

Talking about the Present Situation and Development Prospect of China's Electric Power Industry
  1. The current situation of China’s power industry

The current situation of China’s power industry can be roughly explained by the following points.

  1. Rapid development of installed capacity
    By the end of 2004, China’s installed power generation capacity reached 440GW, ranking second in the world. The Three Gorges Hydropower Station has a total installed capacity of 22.4GW (32×700MW), which is the largest power station in the world. Since 2003, the units have been put into power generation one after another, and they will all be put into operation before the end of 2008.
    As the power gap is still large, according to the policy of developing both water and fire, China’s installed power generation capacity still maintains a high-speed development force.
  2. Power transmission from west to east, mutual supply from north to south, and gradual realization of national networking
    The distribution of resources and economic development in various regions of China are very unbalanced: from the perspective of primary energy distribution, hydropower resources are mainly concentrated in the western and southwestern regions, accounting for 83% of the country’s developable capacity, while coal resources are concentrated in the northern and northwestern regions, accounting for 83% of the national total. 80%; from the perspective of regional economic development and power consumption levels, the central and eastern coastal regions account for 82% of the country’s total economic output, and power consumption accounts for 78%. Based on this unbalanced situation of resources and economic development, the pattern of China’s planned power system development is “transmitting electricity from the west to the east, supplying electricity from the north to the south, and gradually realizing the nationwide interconnection”.

West-to-East power transmission includes three main lines: North, Central and South.
1) The northern passage mainly consists of two parts:
①The coal power from Inner Mongolia and Shanxi in the North China Power Grid is transported to Beijing, Tianjin, Hebei and Shandong.
② Coal power from Shaanxi and Ningxia, water and thermal power from Gansu and Qinghai are transported to Beijing, Tianjin and Hebei.
The planned power transmission scale of the northern channel was about 7GW in 2005, increased to 18GW in 2010, and increased to 40GW in 2020. Xinjiang Hami Coal Power Base will be connected to Gansu Hexi Corridor through 750kV AC transmission line to realize the close connection between Xinjiang power grid and the main grid in Northwest China.

2) The central passage is mainly to build large hydropower stations such as Xiangjiaba, Xiluodu, Baihetan and Wudongde in the lower reaches of Jinsha River and large hydropower stations on the Yalong River and Dadu River in Sichuan to transmit electricity to East China, Central China and South China. In 2005, the power transmission scale of the central channel of West-East Power Transmission was about 7GW, increased to 21.8GW in 2010, and increased to 40-45GW in 2020.

3) The southern channel is mainly to develop hydropower and coal-fired power in Yunnan and Guizhou, and transmit power to Guangdong and Guangxi by means of AC and DC combined power transmission. The power transmission scale of the West-East Power Transmission South Channel was about 10.88GW in 2005, increased to 15GW in 2010, and increased to 20-25GW in 2020. The scale of the national power transmission from west to east was about 25GW in 2005, increased to 55GW in 2010, and increased to more than 100GW in 2020.

In terms of north-south mutual supply and cross-regional power grid interconnection, through the construction of the Three Gorges, Guangdong DC transmission project and the Central China-North China interconnection DC transmission project, the main channel between the north and the south with the Three Gorges as the support point is formed. In addition, the interconnection project between the Northwest Power Grid and the Sichuan-Chongqing Power Grid, and the Sichuan-Chongqing Power Grid and the Southern Power Grid will be constructed to strengthen the mutual supply capacity of the North and the South. A 1000kV UHV AC transmission line will also be built in the national network.

  1. The development prospect of China’s power industry

At present, China’s per capita electricity consumption is still quite low, and the power supply and power grid need to be vigorously developed. Therefore, there is a huge potential for the development of China’s power industry. According to China’s resource situation, the government has determined the basic policy for power construction: “Optimize the structure of thermal power, vigorously develop hydropower, properly develop nuclear power, and develop multiple new energy power generation according to local conditions.

China is the largest coal producer and consumer in the world. Coal accounts for about 76% of commercial energy consumption and has become the main source of air pollution in China. At present, China’s large SO2 emissions are a very prominent problem. Vigorously developing new and renewable energy such as solar energy, wind energy, biomass energy, geothermal energy and ocean energy will become one of the important measures to reduce environmental pollution.

The wind energy reserves that can be developed and utilized in China are about 1,000GW, of which, the onshore wind energy reserves are about 253GW (calculated based on the 10m height data on land), and the offshore wind energy reserves that can be developed and utilized are about 750GW, totaling 1,000GW. The wind energy resources are very rich. . The “Three Norths” area includes the three northeastern provinces, Hebei, Inner Mongolia, Gansu, Qinghai, Tibet and Xinjiang. There is a nearly 200km wide area with a wind power density of 200~300W/m? Above, some up to 500 W/m? Above, the wind energy reserves that can be developed and utilized are about 200GW, accounting for about 79% of the national land usable reserves.

Wind farms in these areas are flat, with convenient transportation and no destructive wind speed. They are the largest wind energy resource areas in China, which are conducive to large-scale development of wind farms. With the promulgation and implementation of the National Renewable Energy Law and the Trial Measures for the Management of Renewable Energy Power Generation Prices and Expense Sharing, it provides legal and economic guarantees for the development of renewable energy in China. In May 2005, the National Development and Reform Commission held the second National Wind Power Construction Preliminary Work Conference in Urumqi, Xinjiang, and issued the “National 2020 Wind Power Installed Capacity Planning Target Implementation Plan”. The implementation plan of the planning objectives puts forward the guiding ideology, basic principles and development goals of the national wind farm engineering planning, and arranges the planning objectives, organization and management, work progress and working methods of wind farm projects in various provinces and regions across the country.

At present, China has built a 750kV power transmission and transformation demonstration project in the northwest, and plans to first build an AC 1000kV UHV transmission line in the central part to strengthen the north-south interconnection. With the realization of the national interconnection, in order to ensure the safety of operation, it is necessary to adopt modern technology to improve the controllability (also known as flexibility or flexibility) of the power generation and transmission system to meet the above-mentioned basic requirements for the operation of the power system, especially To prevent power system collapse accidents.
China’s electricity market is gradually taking shape, and the management system is changing. In line with this, it is necessary to improve the level of automation in operation management.

To sum up, the development prospect of China’s electric power industry is very bright, and the tasks facing electric power workers are also very arduous.

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