基于本地量的振荡解列装置原理研究

该文对基于本地量的振荡解列装置进行了研究，通过对电力系统异步运行状态的分析，提出了利用阻抗角的变化时序及功率变化过零点时的电压为最低值为检测失步状态，通过最小测量阻抗判别振荡中心是否在本线路上，通过检测失步周期数实现振荡解列装置的配合。同时给出了装置的实现框图，并通过算例验证了判据的正确性。

STUDY ON PRINCIPLE OF POWER SYSTEM SEPARATION DEVICE BASED ON LOCAL ELECTRICAL PARAMETER

A power system separation device based on local electrical parameter hasbeen introduced in this article.Through the analyses to out of step status of power system,one system separation criterion is proposed. When the impedance angle goes through a preset area,at the same time,if the magnitude of the voltage falls down to the lowest value when the line real power changes direction,out of step is detected. If the minimum magnitude of impedance measured less than the predetermined threshold,separation will start, the cooperation of different devices are also proposed according to the number of swing.The simplified flow chart of separation device is given out .At the end of the article,an actual case is described to show the validity and correction of this method.