一种适合大型风电场的无功补偿方案

A Reactive Power Compensation Method Suitable for Large-scale Wind Farm

针对风电场实际情况,建立了异步风电机组稳态潮流计算模型,充分考虑了大型风电场内部箱式变压器的损耗,并给出了简化计算方法,在此基础上确定了一种适合大型风电场的无功补偿方案,即使用并联电容器组在发电机机端就地补偿和在风场变电站处集中补偿相结合的方式。在电力系统分析仿真软件PowerFactory13.1环境里搭建出风场模型,并在一32节点的配电网中进行仿真计算。结果表明在确定大型风场的无功补偿方案时考虑箱变损耗是必要且有一定实际意义的,且所给出的无功补偿方案能达到预期目的。

According to the actual situation of wind farm, the steady state power flow calculation model of asynchronous wind generator is established. The power loss of transformers is fully taken into account, and a simplified method of loss calculation is also presented. Based on these, a reactive power compensation method which is fit for large-scale wind farm is proposed. The method using shunt capacitor banks adopts combined measures, which are the distributed compensation on the spot of generator and the centralized compensation in wind farm substation. A wind farm model is built in the power system analysis simulation software PowerFactoryl3.1, and the power flow calculation of a 32-bus distribution network including the wind farm is performed. Calculation results show that the consideration of power loss of transformers is necessary and practically significant while determining the reactive power compensation method and the compensation method proposed in the paper also serves the purpose well.