并网风电出力平稳控制方法综述

风电以其清洁无污染、环境友好、技术成熟等优势,成为电力系统发展的热点。为有效利用风能,大规模风电场必须实现并网运行,但风电输出功率具有波动性和随机性,会对接入电网的稳定性和电能质量等方面造成不利影响,制约了风电的快速发展。针对如何改善风电出力波动对接入电网影响问题,分析了风电接入对电网的影响,对现有风电场出力的平稳控制方法进行了总结,提出了有待进一步研究的方向。研究结果表明;风电场装设无功补偿装置、采用储能技术或者和其他分布式电源组成微电网,可有效平稳风电出力的波动,改善对接入电网的影响。

Survey on approaches to smooth output of shunt-connected wind farm

Wind power has been the hot spot in the development of power systems, because it has following advantages： clean, kind to the environment, technique-matured and so on. In order to utilize the wind power effectively, the large wind farms must he connected with the power system. But the output of wind farm is fluctuant and random, so it can do harm to the stability and power quality of the power system, which becomes a bottleneck of developing the wind power quickly. Aiming at the impacts on the power system brought by the fluctuation of wind power output, the effects on power system of shunt-connected wind farm were analyzed. The existing control methods of smoothing the wind power output were summarized and the future research was pointed out. The resuh indicates that installing reactive power compensation devices or adopting energy storage devices in wind farms or making up microgrid with other distributed generations are effective approaches to smooth the output of wind farm and reduce the impacts on power system integration.