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电网技术  2015 

多功能固态限流器自故障诊断与恢复

DOI: 10.13335/j.1000-3673.pst.2015.07.028, PP. 1948-1955

Keywords: 多功能固态限流器,三相四桥臂,故障诊断,故障恢复

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Abstract:

为实现对多功能固态限流逆变侧三相四桥臂故障进行有效诊断,提出了一种不需经过帕克变换的半周期单桥臂平均电流检测法,同时对整流侧三桥臂故障也适用。在实现快速准确诊断多功能限流器自身绝缘栅双极型晶体管(insulated-gatebipolartransistor,IGBT)开路故障的基础上,提出一种能在双管IGBT同时故障状态下,通过组选开关控制备用桥臂来实现系统故障桥臂物理替换,同时将故障相控制信号赋给备用桥臂,实现多功能限流器自故障快速恢复的方法。仿真和试验验证了检测和故障快速恢复方法的可行性与正确性。

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