基于状态检测技术的干式电压互感器故障诊断

Fault Diagnosis for the Dry Potential Transformer Based on Status Test Technology

单一方法难以准确判断配网中干式电压互感器故障原因。基于状态检测技术对故障及同批次同型号正常的电压互感器进行停电、带电检测与运行状态仿真,综合分析其绝缘与电气性能,准确判断出故障原因,从而有针对性地提出制造工艺或系统运行方式的改进等预控措施。通过对10 kV干式电压互感器故障分析实例,验证了采用状态检测技术诊断干式电压互感器的有效性及必要性。

It is difficult to use a single method to make an accurate judgment about fault causes of the dry potential transformer in the distribution network. Based on status test technology, power-off test, live test and simulation of operational state were carried out on the faults as well as normal potential transformers of the same type and same batch, a comprehensive analysis of their insulation and electrical performance was made, and fault causes were determined accurately, so that specific precaution measures might be proposed with regards to improvement of manufacturing process or system operation mode. The effectiveness and necessity of adoption of status test technology for the diagnosis of the dry potential transformer was verified in a fault analysis case of a 10 kV dry potential transformer.