基于油压监测的电力少油设备状态检修技术探讨及应用

Discuss on Condition-based Maintenance Technology of Oil Less Equipment Based on Oil Pressure Monitoring and Its Application

摘要:

少油设备的检修以周期性停电检修为主，该方式很难及早发现设备异常，易错过发现设备故障的最佳时机，酿成爆炸事故。现有的泄漏电流、介质损耗、局部放电等在线监测方法，也难于实时监测设备故障信息。为此建立了油浸式套管和电流互感器的油压分析模型，提出油压实时监测、异常预警、带电取油、色谱验证以及缺陷处置的少油设备状态检修技术路线，研制出油压在线监测、带电校验、带电取补油等成套设备，并进行现场应用。通过典型案例分析，进一步验证技术方案的可行性。

Abstract:

Traditional overhaul of oil less equipment is mainly based on periodic power outage inspection, but it is difficult to find out the abnormalities at the first time, which easily misses the best time to overhaul and ultimately leads to an explosion accident. The current on-line monitoring methods such as leakage current, dielectric loss and partial discharge are also difficult to monitor the fault information of equipment in real time. To solve these problems, firstly the oil pressure analysis model for oil-immersed bushing and current transformer is established. And then, a technical route of condition-based maintenance is proposed for oil less equipment based on oil pressure online monitoring, fault early warning, oil sampling with load, chromatography analysis and defect handling. Further, a complete set of oil pressure online monitoring equipment, live calibration equipment and live oil sampling and refueling equipment are developed. Finally, with typical on-site cases, the feasibility of condition-based maintenance technology based on oil pressure monitoring is verified.