摘要
在研究了三相不可控整流桥的功率因数及波形校正原理和控制策略的基础上，提出了单开关三相高功率因数／低谐波校正器的两种新的变频率控制方法，即改进的间断时间控制法和改进的等面积控制法。分析了校正器的控制原理，给出了这两种控制方法的数字仿真结果，并对它们的优缺点进行了比较，所获结论对校正器装置的实现具有重要的指导意义。
In recent years. several accidents happened in 110 kV substations. Many power transformers are damagedseriously in the accidents when short-circuit faults occur at lower voltage sides of transformers due to failure of DC supplysystems. After analyzing the fault at secondary side of power transformer, this paper presents a technical scheme to trip outpower supply of the substation from the supplying 11o kv substation. A new protective relay, based on the techniqueproposed in this paper. is installed in the remote substation. So the relay is called the remote backup protection forsubstation.
出处
《电力系统自动化》
EI
CSCD
北大核心
1999年第20期33-37,共5页
Automation of Electric Power Systems
关键词
功率因数
谐波
整流器
校正器
电力系统
power factor power harmonics rectifier corrector control method
