In response to the dilemma of high and low wind power and low voltage requirements for grid transmission, China has developed a “large-scale cluster wind power active intelligent control systemâ€, which has been used in Jiuquan wind power base to fill the gap in China's wind power access technology.
Gansu Electric Power Company undertook the development and research of the “large-scale cluster wind power active intelligent control system†project of the State Grid Corporation of China, and combined with the actual technical problems of wind power transmission faced by China in the construction of the first tens of kilowatt-class wind power base Jiuquan wind power base. And proceed.
“The region with abundant wind energy resources in China is basically located in the vast northern and western regions, where the power load is small and the power grid is weak,†said Zhou Fengqi, a professor at the National Development and Reform Commission. "This determines that China's wind power can not be developed in accordance with the European model of 'distributed Internet, on-site consumption', and can only be a mode of 'large-scale-high concentration-high voltage-long-distance transport'. And wind power intermittent power generation features on the grid The ability to absorb capacity raises challenges. In order to maintain stable operation of the power grid, it is urgent to conduct research on technology and scheduling management."
"For the contradiction between large-scale wind power large-capacity transmission and safe operation of power grids, we first proposed two control strategies for large-scale cluster wind power output and output tracking, and developed a large-scale cluster wind power active intelligent control system." Gansu Provincial Electric Power Company Dispatch Center Engineer Yao Xu said. “In this system, the real-time assessment of the wind power capacity of the grid is realized for the first time. Then, according to the evaluation results, the maximum power generation output of the wind power is determined, and the power generation plan of each wind farm is allocated and displayed, and the coordination of wind power intelligent dispatching, active intelligent control, and wind-fire bundling is achieved. control."
The reporter learned that at present, nine wind farms and two thermal power plants in China's first 10 million-kilowatt wind power base have been connected to the system and officially put into operation, realizing the interactive closed-loop control of the cluster wind power and the power grid. The commissioning of the project not only ensures the safe and stable operation of the power grid, but also ensures the maximum and optimization of wind power transmission.
China is currently the fastest growing wind power country in the world. In 2009, China's wind power installed capacity growth rate ranked first in the world, accumulative wind power installed capacity has reached 26.01 million kilowatts, achieving 100% growth for four consecutive years, by the end of 2010, China's wind power installed capacity exceeded 35 million kilowatts.
The reporter learned that although China's installed capacity has grown rapidly, it is not always possible to achieve grid-connected power generation. “The main reason is that it is difficult to achieve large-scale transportation,†said Wang Ningyu, director of the Wind Power Technology Center of Gansu Electric Power Company.
The large-scale cluster wind power active intelligent control system provides technical support for China to solve the wind power access problem and fills the domestic gap. At the appraisal meeting organized by the China Electrical Engineering Society at the end of last year, nine experts including Dai Huizhu, a professor at the New Energy Research Institute of the China Electric Power Research Institute, spoke highly of the results. The appraisal believes that the system is the first, and its research results fill the domestic gap. At the same time, the breakthrough of large-scale cluster wind power active control technology provides valuable experience for comprehensively solving the new energy access and sending out key technical problems under the model of “scale development, centralized grid connection and long-distance transportation†of China's new energy.
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