末端送出电网风电大规模脱网对主电网安全稳定控制策略分析

Analysis on Security and Stability Control Strategy after Off － grid of Large － scale Wind Turbine Uints in End of Grid

摘要:

针对含大量风电场的末端地区电网外送通道由 220 kV 上升为 750 kV 网架后，研究风电机组大规模脱网时， 地区电网和主电网电压、频率的动态过程，运用 PSASP 程序仿真分析，提出稳定控制策略。计算结果表明，变电站母 线电压波动的幅度与一次性脱网的风电区域容量成线性关系。在电压振幅较大的变电站加装动态无功补偿设备，该 变电站母线电压的攀升得到了有效控制。

Abstract:

Aiming at a large amount of wind farms increased from 220 kV to 750 kV grid，the dynamic process of voltage and frequency problems in regional power grid and main power grid is studied after off － grid of large － scale wind turbine units， and the stability control strategy is put forward after simulation analysis with PSASP program． The calculation results show that the voltage fluctuation of substation bus is proportional to the capacity of wind power area． Dynamic reactive power compensation equipment is installed in substation with large voltage amplitude，and the voltage increase of the variable bus is effectively controlled．