中国电机工程学报2016，Vol.36Issue(4)：986-992,1181,8.DOI:10.13334/j.0258-8013.pcsee.2016.04.012
失步振荡下瞬时频率特性及振荡中心定位方法
Instantaneous Frequency Characteristics and Oscillation Center Location Method for Out of Step Oscillation
摘要
Abstract
Instantaneous frequency should be used to reflect power system characterization in the process of out-of-step oscillation. A two-machine oscillator model based on instantaneous frequency was set up to study voltage and current frequency response in the process of out-of-step oscillation. Voltage instantaneous frequency of out-of-step oscillation center is equal to the unit frequency combined. The bus voltage instantaneous frequency move in opposite direction and have no intersection in two sides of the out of step oscillation center. Voltage instantaneous frequency reaches its extreme value when power system angle is 180°. The current instantaneous frequency between the two unit frequency if the oscillation center falls within the system, and only when both units have the same voltage amplitude , the instantaneous frequency is equal to the instantaneous voltage of out of step oscillation center. A method to pinpoint oscillation center based on instantaneous frequency was put forward. Oscillation splitting device installed in substation can not only judge that whether the oscillation center is on line but also can accurately pinpoint the oscillation center position, by simply introducing voltage instantaneous frequency information of the other substation. Simulation results verify the correctness of oscillation center location method.关键词
失步振荡/瞬时频率/振荡中心/定位/解列Key words
out-of-step oscillation/instantaneous frequency/oscillation center/accurate positioning/splitting分类
信息技术与安全科学引用本文复制引用
刘福锁,方勇杰,吴雪莲,李威..失步振荡下瞬时频率特性及振荡中心定位方法[J].中国电机工程学报,2016,36(4):986-992,1181,8.基金项目
国家电网公司大电网重大专项资助项目(SGCC-MPLG003-2012).Major Projects on Planning and Operation Control of Large Scale Grid (SGCC-MPLG003-2012). （SGCC-MPLG003-2012）
