混合风电场的无功功率协调控制策略与仿真

摘要

为了改善定速异步风电机组(FSIG)风电场的故障穿越能力,利用少量的直驱永磁风电机组(D-PMSG)与FSIG建立混合型风电场,通过对D-PMSG网侧变流器采用无功功率协调控制策略,利用它快速调节有功、无功的能力,来满足故障状态下FSIG的无功需求,以实现整个风电场的无功优化.利用Matlab/Simulink对混合风电场进行了建模和仿真,仿真结果表明,采用D-PMSG不仅可以提高风电场的故障穿越能力,还可以使风电场的有功输出更加平滑,满足风电并网规范的要求.%In order to improve the fault ride-through capability of wind farms based on fixed speed induction generator (FSIG) , A few of permanent-magnet synchronous generators (PMSG) are used to build hybrid wind farms. A coordinated reactive power control scheme for PMSG grid-side converter is introduced, which has the ability to quickly adjust active and reactive power, compensate the reactive power demanded by the FSIG in fault conditions. The studied system models are set up by Matlab/Simulink. Simulation results show that this scheme not only improves the fault ride-through capability of wind farms, but also makes active power output smoothing, which can satisfy the requirement of grid-connection regulation of wind farm.