过电压监测技术与设备绝缘状态研究分析

Research of Overvoltage On-line Monitoring and Analysis of Power Equipment's Insulation Conditions

针对电力系统的暂态过电压产生的危害问题,提出了开展暂态过电压监测的重要性,在此基础上设计了一种暂态过电压监测装置,长期挂网运行证明,该装置工作稳定、可靠。通过暂态过电压的在线监测,基于绝缘配合与设备绝缘状态的关系,综合分析变电设备的绝缘工作状况,预测变电设备的绝缘状态,提出对变电设备进行预防性检修与预知性维护工作的依据。

Transient overvoltage may cause damages on power systems, so it is important to carry out overvoltage on-line monitoring. An on-line monitoring system for transient overvoltages was designed and proved to be stable and reliable. Based on the on-line monitoring system and com- prehensive analysis on the relationship of insulation coordination and equipment insulation condition, the working state of transformer equipment insulation was studied and the insulation conditions of substation equipments were forecasted, so as to propose a basis for the preventive and predictive maintenance of power equipments.