基于超短期负荷预测的变电站综合调压方法研究

Study on integrated voltage adjustment based on super short time load forecast in substation

针对变电站电压和无功控制中补偿电容器和变压器分接头的“投切振荡”问题,为了避免不必要的延时等待,提高无功补偿控制的针对性,提出将超短期负荷预测引入变电站电压无功实时控制,通过超短期负荷预测,掌握负荷变化和波动情况,在满足电压和功率因数合格的前提下,充分利用变压器的过载能力,尽量减少电容器投切次数和不必要的调整,从而提升变电站电压无功控制的性能,并可延长主变分接头和电容器开关的寿命。仿真算例验证了该方法的可行性和优越性。

In order to solve the problem of ＂power oscillation＂ occurred in reactive and voltage control while switching compensating capacitors or adjusting tap joint, the real-time control method of reactive and voltage in substation based on super short time load forecast is proposed, which can be used to avoid the surge and time delay of adjustment for capacitor and transformer in substation, By mastering the change and fluctuation of load, the overload capacity of the transformer can be fully utilized to reduce the adjusting times of the compensating capacitors on the premise of the qualified voltage and power factor, By this way, the capability of reactive and voltage control can be promoted and the life of the transformer tap changer and the capacitor switch can also be prolonged. The simulation results show the feasibility and advantage of the method mentioned in the paper.