特高压换流变压器阀侧套管TA故障分析及检修

Analysis and Maintenance of Valve Side Bushing TA Faults on UHV Converter Transformer

为提高特高压换流变压器阀侧套管TA故障分析及检修水平,讨论两起换流变压器阀侧套管TA故障诊断、检查、检修案例,并分别对两起故障诱因进行细致分析,对阀侧套管TA故障采取的检修措施和步骤进行细致论述。经相关电气试验验证,两台换流变压器阀侧套管TA故障均得到有效解决,实践证明本文所论述的换流变压器阀侧套管TA故障检修策略和措施切实有效,为换流变压器阀侧套管TA故障预防提供运维检修经验和借鉴,为变电站实施反事故技术措施提供相关依据。

In order to improve the level of valve side TA fault analysis and maintenance on converter transformer in UHV substation,two cases about fault diagnosis,inspection and overhaul on valve side bushing converter transformer are discussed.Causes,maintenance measures and steps are analyzed in detail.Relevant electrical tests show that the faults on valve side TA have been effectively solved.Practice show that the maintenance strategies and measures for TA faults of converter transformer valve side bushing discussed in this paper are effective.Valuable experiences and references are provided to similar overhaul,and relevant basis is provided for anti-accident measures in UHV substations.