摘要
阐述了并联型电能质量调节装置启动时变流器直流侧电容电压由稳态值突然上升到设定值的瞬时变化引起的电容上电流冲击过大的问题及其危害。比较了在充电瞬间为了避免上述情况,采用附加限流电阻充电和利用辅助电路充电两种解决方案的优劣,并且对这两种方案进行了仿真验证。通过比较分析,得出两种方案各有优点,都能有效地保证电能质量装置安全的投入运行的结论。
This paper expounds the problems and dangers of excessive current impulse through the capacitor which caused by the instantaneous changes when the parallel power quality conditioner starts charging. This instantaneous change appeared when capacitor voltage of converter DC side changes from steady value to set value. In order to prevent such a situation, two control strategies are discussed and compared. One method uses a current limiting resistor at the charging circuit and the other uses an auxiliary charging circuit, both of which are verified by simulation. By comparing and analyzing, this paper concludes that two control strategies have its own advantages, and both of the methods can effectively guarantee the safety of the device when they are put into operation.
出处
《电力系统保护与控制》
EI
CSCD
北大核心
2009年第22期87-90,共4页
Power System Protection and Control
基金
十一五'国家科技支撑计划项目资助(2007BAA12B03)
关键词
并联型电能质量调节装置
启动充电
限流电阻
轮换充电
shunt power quality conditioner
start-up charge
current limiting resistor
alternative charge
