自动电压控制中考虑降压减载的协调控制方法

Application of Voltage-decreasing and Load Shedding based on Load-voltage Characteristics in Automatic Voltage Control

处理电网中设备过载或错峰的传统方法是通过自动负荷控制的方法,切除优先级较低的负荷,其缺点是最终会导致部分用户停电。本文在传统的自动电压控制及考虑负荷电压特性的基础上,通过建立负荷的ZIP模型及计算变电站有功负荷和负荷母线电压之间的灵敏度,从而实现通过投切电容或调节变压器档位的方法来调节电压,最终达到通过AVC来减载的目的,从而达到了AVC与降压减载的协调控制。现场运行情况表明,本文提出的方法是有效的,可以通过调节电压的方法达到减载的目的从而保证了供电质量。

It often happens that the power grid runs beyond its schedule or the power device works beyond its safety restriction. The traditional method is to shed some loads by real-time automatic load controlling system. In this paper, a method of soft load shedding is given by the studying the relation of load real active power and its corresponding voltage in the AVC system. The field running results show that this method can meet the real-time demand and supply power to users as much as possible on the basis of power grid safety.