风力发电引起的电压波动和闪变

并网风电机组在持续运行和切换操作过程中都会产生电压波动和闪变，对当地电网的电能质量有不良影响。从并网风电机组输出的功率波动出发，分析了风力发电引起电压波动和闪变的主要原因。介绍了关于并网风电机组电能质量的国际电工标准IEC 61400-21，给出了风电机组在持续运行与切换操作期间引起的闪变值和相对电压变动的计算公式。然后综述了有关风力发电引起的电压波动和闪变的计算方法和影响因素等方面的研究成果，最后展望了未来的研究方向和研究重点。

VOLTAGE FLUCTUATION AND FLICKER CAUSED BY WIND POWER GENERATION

During the continuous operation and the switching-option of wind turbines connected to the power grid, the voltage fluctuation and flicker occur and affect the power quality in the local power network. Starting from the fluctuation of the power output of wind turbines, the main reasons causing the voltage fluctuation and flicker by wind power generation are analyzed, then the IEC Standard 61400-21 for the power quality of grid-connected wind turbines is introduced. The calculation formulae for flicker and relative voltage change which occurs during the continuous operation and the switching-option of wind turbines are given. The research achievements in the calculation methods and the influencing factors of the voltage fluctuation and flicker caused by wind power generation is summarized. Finally, the research area and the key problems to be researched in the future are viewed.