基于起振特性的强迫振荡扰动源定位及解列方案

强迫振荡已成为目前低频振荡事故的主要形式,快速定位并解列扰动源是抑制强迫振荡的有效手段。在起振阶段,由于惯性环节的存在,离扰动源较远的节点测量量振荡相位较之离扰动点较近的节点滞后,此特性可作为扰动源定位能量函数法的辅助判据,用于从多个疑似扰动源所在区域中正确定位扰动源。通过对南方电网某方式的仿真验证了该方法的有效性。结合强迫振荡扰动源解列的特点,提出两种解列方案,分别为:基于电网实际分区,解列扰动源所在的区域;基于图论提出适用于扰动源解列的断面调整规则,确定解列断面。

A locating and splitting scheme for disturbance source of forced power oscillation based on the propagation characteristic

Locating and splitting the disturbance source is the most efficient way to deal with forced power oscillation. In the initial stage, comparing with the oscillating measurement data of the bus that is close to the disturbance source, the one that is further away is phase lag because of the inertia units. The oscillation starting characteristic is considered to identify the disturbance source from suspected subareas. The scheme is validated by simulations. By combining the characteristic of disturbance source of forced power oscillation islanding control, two separation control schemes are designed. One is splitting the subarea which disturbance source is located in based on actual subarea division of the power systems. The other is determining the splitting surfaces according to the proposed adjustment rules which are applicable to disturbance source islanding control.