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对于含大规模风电的电力系统,风电有功出力的易变性会引起并网点电压波动。针对传统方法为满足电压要求而导致无功补偿设备动作过于频繁的问题,应用电力系统综合分析程序(PSASP),对某省2015年含大规模风电电网进行稳态仿真计算,分析夏大负荷条件下不同风电出力断面,以网损作为评价指标,以无功补偿装置等设备的投切次数作为优化目标,提出一种能够适应风电大范围波动的无功设备投切策略。仿真算例表明,在风电出力大范围波动的情况下,该策略显著减少了无功补偿装置的投切次数。所得结论可为电力系统的运行调度及规划提供依据及参考,具有工程实用性。
For power systems with large-scale wind power, variability in wind power output may cause voltage fluctuations at the grid connection points. Aiming at the problem that the traditional method to meet the voltage requirements causes the reactive power compensation equipment to operate too frequently, the PSASP (Power System Comprehensive Analysis Program) is used to carry out the steady state simulation calculation of a large-scale wind power grid in a province in 2015, Under different wind power output sections, the network loss is taken as the evaluation index and the switching times of equipments such as reactive power compensation devices are taken as the optimization objectives. A switching strategy of reactive power equipment that can adapt to the large-scale fluctuation of wind power is proposed. The simulation results show that this strategy can significantly reduce the switching times of reactive power compensation devices in the case of large fluctuations in wind power output. The conclusions can provide the basis and reference for the operation scheduling and planning of power system, and have engineering practicability.