摘要
传统的无故障跳闸判据只检测线路上潮流的突然变化,在潮流转移后线路轻载时容易导致稳定控制装置的误动。文中分析了不同情况下线路首端测量阻抗的特性,揭示了装置安装处的测量阻抗值在线路无故障跳闸时和潮流转移时具有明显差异的机理,提出了基于本地电气量计算出的测量阻抗的无故障跳闸新判据,并用数字仿真验证其有效性。
The traditional method of identifying non-fault line tripping is based on the detection of only the sudden variation of line power flow and is likely to cause unintended operation of stability control devices under such conditions as light loading after a system swing. This paper presents an analysis of the measured impedance characteristics at one end of the transmission line under different conditions, reveals the mechanism of the measured impedance having distinct different Values for non-fault line tripping out and power Swing, and then proposes a new method of identifying non-fault line tripping based on local impedance measurement. Digital simulation results are given to validate the new method.
出处
《电力系统自动化》
EI
CSCD
北大核心
2008年第3期33-35,65,共4页
Automation of Electric Power Systems
基金
国家电网公司重大科技创新专项任务合同(SGKJ[2007]98
SGKJ[2007]99)
国家电网公司电力系统安全稳定分析与控制重点实验室资助项目~~
关键词
稳定控制
无故障跳闸
潮流转移
测量阻抗
开路阻抗
本地电气量
stability control
non-fatilt tripping
power swing
impedance measurement
open-circuit impedance
local electrical quantities
