The person in charge of the State Grid Corporation of China recently stated that in order to solve the current difficulties encountered in the development of new energy such as wind power, the State Grid will adopt multiple measures to ensure the efficient use of new energy and grid integration. Many construction and planning designs are underway. Cross-regional power grid project investment will exceed 100 billion yuan.
According to Zhang Zhengling, deputy director of the Development and Planning Department of the State Grid Corporation of China, the Energy Bureau has already obtained the Ximeng-Nanjing exchange route for the preparatory work of the State Energy Bureau, with an investment of 32.2 billion yuan; it is applying for the preparatory work of Jiuquan Hunan and Hami to the north of the road section. The investment in Chongqing DC lines was 27.6 billion yuan and 24.5 billion yuan respectively; in addition, a feasibility study was underway for the investment of 28 billion yuan in Zhangbei-Wuhan AC line.
As of June this year, China's grid-connected wind power capacity reached 52.58 million kilowatts, which has replaced the United States as the world's largest wind power country. Among them, the grid-connected wind power of the national grid has reached 50.26 million kilowatts, and the average annual growth rate has reached 87% in the past six years. At the same time, however, the difficulties in integrating wind power into the grid are becoming increasingly prominent. According to the "Supervision and Supervision Report on Wind Power Dissipation in Key Regions" published by the State Electricity Regulatory Commission recently, the average utilization hours of wind farms in the Northeast, North China, and Northwest China (hereafter referred to as "Three North" regions) was 1,907 hours in 2011, a year-on-year decrease. In 266 hours, the wind power of the abandoned wind reached 12.3 billion kwh, the wind rejection rate was about 16%, and the wind power loss was about 6.6 billion yuan, of which the wind abandonment rate in Gansu and Inner Mongolia exceeded 25%.
It is worth noting that the next step will be the rapid development of wind power installed capacity. According to the national wind power development plan, the scale of wind power in 2015 will reach 100 million kilowatts, 200 million kilowatts in 2020, and more than 80% will be concentrated in the “Three North†region. Shu Yinji, deputy general manager of State Grid, stressed that from a national perspective, peaking resources in the eastern and central regions are relatively abundant, and the market potential of eliminating wind power is not fully realized. The key issue at the moment is that the links between the regions are still weak and there is no unified national large market and networking capacity that is compatible with them.
In addition, the China Electricity Regulatory Commission also suggested that the market should play a flexible role in optimizing the allocation of resources and promote wind and fire complementary generation rights trading. The mechanism requires all provinces to establish a compensation mechanism for wind power plants in-depth for peak-to-peak thermal power plants in the region to encourage thermal power companies to perform deep peak load adjustments for wind power consumption, and to address the rigid constraints of planned electricity and system flexibility requirements for wind power development. Contradictions, as well as conflicts of interest between various types of power generation resources within the power system.
"Under the current grid technology level and conditions, it is an economic issue rather than a technical problem to accept more wind power in the power grid. The key is how to coordinate the interests of all parties and increase the capacity of regional wind power consumption." China Wind Energy Professional, Renewable Energy Society An analyst from the committee said that the final solution to the coordination of interests of all parties and the improvement of regional wind power absorption capacity must be the market-oriented reform of the power system, the cancellation of unreasonable planned electricity, the implementation of energy-saving dispatch management methods, and the implementation of renewable resources. Energy power generation full purchase system.
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