Xinhua Power Channel, Feb. 25, Feb. 18. The scientific and technological project "Research and Application of Reactive Power and Voltage Control Technology for 10 MW Wind Power Convergence System" led by Jibei Electric Power Co., Ltd. of China Networks passed the appraisal of achievements organized by China Electrical Machinery Engineering Society. Experts agree that the research results of this project have solved the key problems of reactive power and voltage control in the current tens of millions of kilowatt wind power gathering system, including the detection of dynamic reactive power compensation device under full operation conditions and overall equipment performance, and the development and application of the lean analysis and evaluation system of reactive power and voltage in the wind power gathering system. It fills the gaps in technology at home and abroad, and the research results of the project reach the international leading level.

　　

　　With the rapid development of wind power and large-scale centralized access in China, reactive power and voltage stability has increasingly become a key factor restricting wind power absorption capacity. Hebei Wind Power Base is one of the "tens of millions of kilowatt wind power bases" planned by the state. The fluctuation of reactive power and voltage has an increasingly prominent impact on the safe and stable operation of the power grid. Cui Zhengmei, New Energy Department of Hebei Electric Power Dispatch and Control Center, told reporters that the inadequate reactive power and voltage control capability was one of the main causes of the accidents through the analysis of the previous fan disconnection accidents in Hebei North Power Grid.

　　

　　According to the plan, the total installed capacity of Hebei Wind Power Base in 2015 is 10.78 million kilowatt, of which 10.13 million kilowatt is connected to the North Hebei Power Grid; in 2020, the total installed capacity is 16.43 million kilowatt, of which 15.53 million kilowatt is connected to the North Hebei Power Grid. The level of reactive power and voltage control in wind power Grid-connected affects the safe operation of power grid, but also restricts the development of new energy sources. In view of the current situation and future of wind power development, the North Hebei Electric Power Company of the State Grid has carried out a series of key technical research and tackling.

　　

　　The project "Research and Application of Reactive Power and Voltage Control Technology for 10 MW Wind Power Collection System" has realized the closed-loop control for the whole process of wind power collection system for the first time. Luo Wei, Ministry of State Grid and Northern Hebei Electric Power Development Planning, who participated in the development of the project, said that in the early planning aspect, the project proposed for the first time the reactive power allocation principle of the 10-million-kilowatt wind power collection system worldwide, which has guiding significance for the reactive power allocation of large wind power bases. In the mid-term grid-connected detection, a comprehensive testing technology of wind farm dynamic reactive power compensation device is proposed, which fills the gap of domestic and foreign technology and can ensure the optimal performance of reactive power compensation equipment. In the latter stage of operation monitoring, the lean analysis and evaluation system of reactive power and voltage of wind power gathering system can directly evaluate the operation status of wind power through data extraction.

　　

　　This project has completely independent intellectual property rights. Through scientific pre-planning, high-performance equipment and real-time monitoring and analysis of operation status, it can effectively guarantee the safe and reliable operation of the 10-million-kilowatt wind power collection system, enhance the capacity of new energy grid-connected absorption, and improve the safe operation level of power grid. It has remarkable social and economic benefits. Economic performance.

　　

　　It is understood that reactive power and voltage control and low voltage traversing capability in wind power convergence area are considered to be two major problems that perplex wind power Grid-connected absorption. State Grid Hebei North Electric Power has been actively exploring and tackling key problems in ensuring wind power Grid-connected absorption. In addition to carrying out research on reactive power and voltage control technology, in 2013, the company also focused on promoting low-wear rectification and on-site detection of wind turbines, organizing wind farms to carry out low-wear rectification work as planned, and completed all field detection of wind farms in the region throughout the year. The number of disconnection accidents caused by the lack of low-wear capacity of wind turbines has been greatly reduced.