电源学报2025，Vol.23Issue(2)：283-289,7.DOI:10.13234/j.issn.2095-2805.2025.2.283
主动限流在电力系统换流器故障诊断中的应用
Application of Active Current Limiting in Fault Diagnosis of Converter in Power System
摘要
Abstract
To improve the accuracy and efficiency of diagnosis when a converter fails,an active current limiting method is applied to realize the converter fault diagnosis in a power system.Active current limiting control is used to limit the output DC current from the converter to 1.2 times of rated current and limit the fault current,thus improving the stability of fault diagnosis.Based on a prediction model,the fault current distribution characteristics of the converter in the power system are diagnosed,and the bridge arm current is taken as the diagnosis parameter.The difference between the measured bridge arm current and predicted value is compared.If the difference is greater than the threshold value,it is judged that the converter has a fault.Experimental results show that the proposed method had a high accuracy and a high diagnosis efficiency in diagnosing the converter faults in an experimental power system,and the rates of false diagnosis and missed diagnosis were low,indicating that the converter diagnosis effect was satisfying.关键词
主动限流/电力系统/换流器/故障诊断/预测模型/桥臂电流Key words
Active current limiting/power system/converter/fault diagnosis/prediction model/bridge arm current分类
信息技术与安全科学引用本文复制引用
胡江..主动限流在电力系统换流器故障诊断中的应用[J].电源学报,2025,23(2):283-289,7.基金项目
上海市科学技术委员会科研项目(17DZ1201200)This work is supported by Scientific Research Project of Shanghai Municipality Science and Technology Commission under the grant 17DZ1201200 （17DZ1201200）
