高压失电时斩波串级调速系统逆变侧电子保护电路的设计  

Design of Inverter Side Electronic-protection Circuit of Chopper Cascade Speed System with High-voltage Power Failure

作　　者：张照彦[1,2] 王兵树[1,2] 马永光[1] 王兴武[1,2] 

机构地区：[1]华北电力大学自动化系,保定071003 [2]华北电力大学仿真与控制技术研究所,保定071051

出　　处：《高电压技术》2016年第7期2235-2242,共8页High Voltage Engineering

摘　　要：针对斩波串级调速系统高压失电时接触器保护和快切保护不能有效保护设备内电力电子器件的问题,设计了带电子保护电路的主回路拓扑结构,分析了高压失电时斩波串级调速系统的暂态过程;在模拟带载试验平台上对电子保护电路的调速系统进行测试。测试结果表明,高压失电时调速系统不投电子保护和投入电子保护的故障冲击电流分别为额定值的10~12倍和2~3倍;电子保护电路中限流阻值越大,故障冲击电流越小;故障电流的理论计算值与实测值基本相符,相对误差＆lt;3%;验证了电子保护电路能有效解决有源逆变结构下的高压失电或者逆变颠覆的问题。Contactors and fast-cut protection can not effectively protect power electronics in device when high-voltage power failure of chopper cascade speed control system. To this end, we designed the main circuit topology with electronic protection circuit, and analyzed the transient process of chopper cascade speed control system. Conventional chopper cascade speed control system with electronic protection circuits for high-voltage power failure conditions were tested on the simulated load test platforms. The experimental results show that the fault surge current of the chopper cascade speed control system is about 10 to 12 times of rated current, and the current of the chopper cascade speed control system with electronic protection circuits fault surge currents is about 2 to 3 times of rated current. The higher the limiting-resistance is, the lower the fault current will be. Theoretical value and actual measured values are basically the same and the relative error is less than 3%, It is verified that electronic protection circuits can effectively solve the problem of high-voltage power failure under active inverter structure and inverter subversion.

关 键 词：快切保护 电子保护电路 高压失电 有源逆变 逆变颠覆 

分 类 号：TM572[电气工程—电器]