基于最小网损的风电场无功优化分配策略

Optimization of reactive power distribution strategy for wind farm base on reduced network loss

针对含双馈式风电机组的风电场接入系统维持接入点电压稳定性问题,通过分析通辽某风电场的实测数据,分析其无功补偿特点,提出了基于有功最小的无功优化分配策略;构建了以风力发电机、箱式变压器和集电线路有功损耗最小的无功优化分配目标函数,利用等微增率法对其求解;在考虑风电场有功损耗的前提下,充分利用双馈式风电机组无功调节能力,制定了该风电场无功分配方案。仿真结果表明该策略的可行性,对风电系统的经济运行具有一定的参考价值。

To solve the voltage instability issue caused by wind farm of doubly-fed wind turbine connected to the power system, a reactive power optimization distribution strategy is proposed for wind farm based on reduced active loss after analyzing a wind farm measured data in Tongliao. A reactive power optimization distribution objective function for minimum active loss is constructed, which consists of wind turbines, transformers, collector buses and so on, the micro rate method is used for the solution of objective function; Under the premise of considering wind power active loss, a wind farm reactive power allocation scheme is carried out to fully utilize the reactive power adjustment ability of doubly-fed wind turbine; The simulation of a practical example shows that the proposed strategy is feasible, which provides a reference for the economic operation of wind generation system.