高压电网大气腐蚀在线监测技术进展

针对高压电网输变电设备的大气腐蚀问题,研究了几种典型的大气腐蚀监测技术。基于文献分析,探讨了电偶腐蚀电池、电化学阻抗谱、薄膜电阻传感器、石英晶体微天平以及交流导纳等腐蚀在线监测技术的研究进展,并对比分析了各种监测技术在电力设备中应用的优缺点。采用薄膜电阻探针和交流导纳技术可以实现高压输变电塔、架空地线以及变压设备大气腐蚀的在线监测。对输变电设备的大气腐蚀实施自动化在线监测,可以为设备安全诊断提供重要依据,与大数据分析结合,还可以为故障诊断与寿命评估提供参考。

Advances of Atmospheric Corrosion On-line Monitoring Techniques for Electric Power Grid

The work aims to study several typical several atmospheric corrosion monitoring techniques for the atmospheric corrosion of transmission equipment in high-voltage power grid. Based on literature analysis, the advances in on-line monitoring techniques were discussed, such as galvanic corrosion cell (GCC), electrochemical impedance spectroscopy (EIS), thin electric resistance probe (TER), quartz crystal microbalance (QCM) and AC inductance. Moreover, the advantages and disadvantages of various monitoring equipment for electrical equipment were compared and analyzed.Thin ER and AC inductance can realize the promising on-line corrosion monitoring of high-voltage power transmission towers and overhead lines as well as transformers. The automatic on-line atmospheric corrosion monitoring for power transmission equipment can provide important basis for equipment safety and can also provide reference for fault diagnosis and life assessment combined with big data analysis.