摘要
直接耦合式串联补偿装置常用来解决配电网中电压暂降、暂升以及瞬时间断等多种电能质量问题。串联补偿装置投入补偿时,具有磁饱和特性的负载由于承受电压的变化会导致磁饱和或偏磁现象。为解决串联补偿装置运行初期磁饱和带来的电流冲击,通过分析磁饱和及偏磁现象产生的过程,基于磁通平衡的原理提出磁饱和抑制策略,恰当应用串联补偿装置的输出来控制负载承受电压,消除磁饱和问题,避免冲击电流带来的破坏性影响,并实现迅速及时、安全有效的补偿。仿真与实验结果表明,冲击电流得以控制,验证了所提控制策略的有效性与可行性。
Direct coupling series compensation equipments are usually used to solve many kinds of power quality problems such as voltage sag,voltage swell,voltage instantaneous interruption and so on.It will incur magnetic saturation or magnetic biasing due to the voltage change of loads with magnetic saturation characteristic when series compensation equipments are compensating.In order to solve the current inrush caused by magnetic saturation when the series compensation equipment is at the initial stage of operation,this paper analyzed the forming process of magnetic saturation and magnetic biasing,and provided the control strategy of suppressing magnetic saturation based on the magnetic balance theory.It properly uses the output of series compensation equipments to control load voltage to eliminate the magnetic saturation problem and avoid the destructive influence caused by inrush current,and realizes rapid,safe and effective compensation.The simulation and experiments results show that the inrush current is under control,and testify the effectiveness and feasibility of the proposing control strategy.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2012年第4期70-76,16,共7页
Proceedings of the CSEE
基金
国家自然科学基金项目(50807052
51107134)~~
关键词
串联补偿装置
磁饱和
偏磁
动态电压恢复器
磁通平衡
直接耦合
series compensation equipment
magnetic saturation
magnetic biasing
dynamic voltage restorer
magnetic balance
direct coupling
