摘要
为了解决电流源型变频器中存在共模电压的问题,提出了一种采用一体化直流电抗器的方法。该方法在传统电流型变频器的直流环节加入共模电感,以减小系统的共模电流和共模电压。对采用一体化电抗器的3种电流源型变频器的共模电压进行了系统分析,并对一体化直流电抗器的共模电感值进行选择。其中将整流器侧电容中性点与逆变器侧电容中性点连接在一起时,共模电压和共模电流都得到了明显抑制,降低了共模噪声对电机的影响。由于省去了用于抑制共模电压的隔离变压器,这种结构使得变频调速系统结构简单,运输方便,成本降低。仿真结果说明了分析的正确性。
It is proposed to add an integrated DC link reactor into the DC sect oi traditional current source converter to reduce its common-mode voltage. The common-mode voltage of current source converter with integrated DC link reactor is analyzed for three topologies and the appropriate value of common-mode inductance is chosen. When the neutral point of capacitor at rectifier side and that at inverter side are connected together,the common-mode voltage and current are well restrained. As the isolation transformer is cancelled,the proposed current source converter is simple and cheap. Simulative results verify the correctness of the theoretical analysis.
出处
《电力自动化设备》
EI
CSCD
北大核心
2011年第10期85-88,共4页
Electric Power Automation Equipment
关键词
变频器
电流源型变频器
共模电压
电抗器
一体化直流电抗器
电路拓扑
electric converters
current source converter
common-mode voltage
electric reactors
integrated DC link reactor
electric network topology
