State Grid Innovation Technology Promotes Sustainable Development of Wind Power

Over the years, the State Grid Corporation actively supported the development of new energy and renewable energy sources such as wind power and hydropower. The national grid company's mid-year work conference recently held further emphasized that support for the orderly development of new energy norms.

The rapid development of wind power in China In recent years, China's wind power has developed rapidly. According to the data released by the Global Wind Energy Council, the cumulative installed capacity of wind power in China reached 62 million kilowatts in 2011, accounting for 26.3% of the world's total capacity. Among them, 18 million kilowatts were newly installed in 2011, accounting for 44% of the global new installed capacity.

As of the end of 2011, the grid-connected capacity of the State Grid Corporation of China reached 43.9 million kilowatts, a year-on-year increase of 55.5%, of which the “Three North” (North China, Northeast China, and Northwest China) accounted for 92% of the total grid-connected capacity. . According to the plan, in the future, China will build 8 million kilowatts of wind power bases in Hami, Jiuquan, Mengxi, Mengdong, Jilin, Hebei, etc., including 6 bases in the “Three North” region, with large-scale construction and high degree of concentration. Most of the electricity needs to be sent out over long distances.

Wind power is characterized by volatility and randomness. Large-scale wind power access affects the safety and stability of power systems. Wind power development faces issues such as inadequate power grid support, difficulties in market absorption, and complex scheduling operations. Access technology research presents a series of new challenges. Accelerating the development of wind power and grid-connected technologies will be of great significance in promoting the rapid and sound development of wind power in China, realizing China's energy strategic adjustment, accelerating the transition from clean energy to complementary energy, reducing environmental pollution, and protecting the ecological environment.

Actively studying wind power grid connection problems Faced with the rapid development of China's wind power business and wind power grid connection problems, the State Grid Corporation of China attaches great importance to scientific and technological innovation, increases investment in scientific research projects, and conducts in-depth studies at multiple levels, from multiple perspectives and in multiple dimensions. At present, the company focuses on wind power grid analysis and evaluation technology, wind power forecasting and resource evaluation technology, wind power dispatching and operation control technology, wind power detection technology and other research work, in order to solve the security of wind power after large-scale access to the power system The bottleneck such as stability, peaking and frequency regulation has promoted the healthy and sustainable development of wind power.

Under the leadership and support of the State Grid Corporation of China, the China Electric Power Research Institute has significantly improved scientific research capabilities, experimental capabilities, technical consulting capabilities, and standards building capabilities in wind power generation and access technology through technological innovation. At present, China Electric Power Research Institute has completed 2 national wind power projects (National Science and Technology Support Project "Key Technologies for Wind Farm Access to Power Systems" and "863 Program" "Development of Low-voltage Traverse Test System for Wind Turbines"). More than 20 science and technology projects. At the same time, it is undertaking 22 national wind power projects (projects), 20 national grid company technology projects, 5 provincial science and technology projects, and 4 international cooperation projects.

Through the research of the above major issues and a series of scientific and technological innovations, the Chinese Academy of Electric Power has made significant technological progress in wind power generation and grid-connected technologies. At present, it has established an accurate description of the stability of the power system in mainstream wind turbines at home and abroad. The mathematic model in the calculation has completed research on wind power acceptance capacity in dozens of provinces (regions) such as Northeast China, Jilin, Liaoning, Northwest China, Gansu, and Xinjiang, and a special study on nearly 300 wind farm access systems.

The implementation of science and technology projects has provided strong technical support for the integration of wind power in China and has yielded fruitful results. As of June, the Chinese Academy of Electric Power has won six science and technology progress awards at the provincial and ministerial level and 10 scientific and technological progress awards from the State Grid Corporation of China.

Significant Achievements in Technological Innovation CEA promotes the sustainable and sustainable development of wind power through technological innovation, which is mainly reflected in several aspects.

The first is to conduct wind power forecasting and monitoring. The Chinese Academy of Electric Power relies on the national large-scale wind power grid-connected system R&D (experiment) center to establish a numerical weather forecast production base with an operation capacity of 53 trillion times per second; wind power forecasting system has been applied to 14 provinces such as Jilin and Jiangsu. The power company has established more than 350 forecast models for wind farms with a corresponding installed capacity of more than 35 million kilowatts. The first wind power dispatching support system in China has been operating in Jilin power grid for nearly two years. At present, the system has been extended to the northwestern and Xinjiang power grids.

In addition, the State Grid Corporation smart grid pilot project "a large-scale wind power forecasting and operation control" system has been completed, and a wind power operation and control technology platform has been built on the dispatch side to realize on-line operation monitoring of wind farms, daily and short-term power forecasts, and active power. , reactive power and voltage control application functions have been completed in Northwest China, Jilin, Gansu, and Xinjiang provinces. The deployment of large-scale wind power grids has greatly improved the efficiency of wind energy utilization and reduces overall system operating costs. Technical Support.

Second, the experimental supporting capacity has been gradually strengthened. The national energy large-scale wind power grid-connected system R&D (experimental) center has a complete wind turbine type test, wind turbine/wind farm grid detection capability, and can carry out power characteristics, noise, power quality, low voltage ride through, grid adaptability, etc. 7 The testing of a total of 45 sub-categories of major categories has become the most authoritative wind power testing agency in China. At present, the center has completed a total of 72 models of low-voltage ride-through type test of wind turbines, 19 models of wind turbines consistent assessment of low-voltage ride-through capability, 37 models of wind turbine power quality testing, 13 models of Wind turbine power regulation capability test, 8 models of wind turbine power performance test.

The third is to actively participate in standard setting. As of June of this year, China Electric Power Research Institute took the lead in the formulation and revision of 38 wind power standards, including 4 national standards, 16 industrial standards, and 14 corporate standards; participated in the formulation of 6 wind power standards, including 1 national standard and 5 industry standards. item. The above standards provide strong support for the orderly integration of China's wind power sciences and ensuring the safe and stable operation of the entire power system.

In the future, the scale of wind power integration in China will increase, and eight wind power bases will gradually be built. The research of wind power grid-connected technologies is a long way to go. The Chinese Academy of Electric Power will give full play to the scientific and technological support and leading role of the research institutes directly under the company, combine the needs of the socio-economic and power system development strategy, further strengthen the basic, strategic, and forward-looking research of wind power integration, actively explore and innovate, and improve wind power in China. The on-grid technology level will lay a solid foundation for the sustainable development of wind power in the future.