风电变流器系统中共模与差模电压的抑制研究  

Researches on Suppression of Common Mode and Differential Mode Voltage in Wind Power Converter

作　　者：孙祖勇[1] 翟炜[2] 石磊[1] 

机构地区：[1]国电南瑞科技股份有限公司,江苏南京210003 [2]国网电力科学研究院,江苏南京210003

出　　处：《电力电子技术》2014年第11期51-53,共3页Power Electronics

摘　　要：这里通过分析风电变流器中共模和差模电压的产生机理,设计了一种机、网侧均采用LRC结构的低通滤波器拓扑结构,同时机侧配备共模电感器。利用共模电流在共模电感器内产生同向磁场从而增大线圈阻尼特性,有效衰减了系统对地的杂散电流。在全功率风电变流器机组中的实验结果表明:这里提出的无源滤波器结构,在兼顾成本、体积的条件下,有效抑制了风电变流器的共模与差模电压。This paper analyzes the wind power converter common and differential mode voltage generation mechanism,a new type of both the converter side and grid side using LRC structure low-pass filter topology and common mode inductors are designed.According to the bus common mode inductor common mode currents to ground principle the same direction,the use of common mode current to a coil produces a magnetic field which increases with the damping characteristics of the coil,the effective attenuation of the system to the ground noise currents,with strong common mode rejection effect.The experimental results show that;the proposed filter structure,the cost,volume can effectively suppress wind power converter common and differential mode voltage.

关 键 词：变流器 共模电压 差模电压 

分 类 号：TM46[电气工程—电器]