风电场并网方式对地区电网电压的影响

随着风电装机容量的增加，在风电场规划设计阶段，选择合适的并网方式对地区电网的安全稳定运行非常重要。在介绍风电场运行特性、接入电网结构特点和分析影响风电场接入电网容量因素的基础上，以某地区实际电网为算例，对风电场以不同的并网方式进行了仿真，结果表明：在风电场出力稳定的情况下，分布式接入比集中方式接入具有较强的电压支撑能力；在风电场并网线路参数一致的情况下，分布式接入与集中方式相比，线损较小；在风电场受到渐变风、阵风、切除风影响时，风电场集中接入方式电压波动较小，分布式接入方式电压波动较大，集中接入方式有较强的电压抗扰动能力。

Wind Farm Synchronization Modes Effect on Regional Power Voltage

With gradual increase of wind farm capacity,it’s important to choose the best way to connect wind farm to regional power network.This paper introduces the operation characteristics of wind farm,structural features of connecting wind farm to regional power network and analyzes the factors which influence the maximum power injection of wind farm to power network.In addition,Regional power system is simulated by PSASP when wind farms are connected to power network in distributed and centralized ways.The results show that: when the output of wind farm is stable,wind farms in distributed way to interconnect to power network is better to voltage stability comparing in centralized way;when wind farms interconnect to power network with the same line parameters,line loss is smaller in distributed way;when wind farms are influenced by the gust wind,ramp wind and removal wind,wind farms in centralized way to interconnect to power network has smaller voltage fluctuations comparing in distributed way.