本文分析了一起220 kV变电站110 kV正母线跳闸异常事件,通过巡视和分析,定性此次异常事件为鸟类引起的异常放电事件.以此结合现有的防范鸟类事故的方法进行总结归纳,提出处理措施和改善建议.

The paper analyzes a main transformer short circuit fault event in a 220 kV substation.After the site conditions of the incident, the main transformer test, and the dismantling inspection, the cause of the main transformer short-circuit fault damage event was determined, and the whole process of the main transformer short-circuit fault damage event was analyzed.In the daily operation of the transformer, the medium voltage side of the main transformer has insufficient short-circuit resistance.When the cable terminal is broken down, the transformer will be short-circuited and damaged.This incident has exposed the design process defects of the equipment and the insufficient patrol vision of the equipment.The problems exposed in this incident remind us that we should be rigorous and meticulous in all aspects of equipment management and daily operation and maintenance, and we can detect and discover in time when we encounter such situations to avoid losses.

本文针对某220kV变电站对开关开展机械特性试验时断路器合闸时间超标的异常事件进行分析与总结.介绍异常事件发生经过,通过现场试验分析,结合变电站3AQ型断路器的合闸数据及三相极柱解体情况,初步确定此次异常事件是由灭弧室内分闸位置弧触指与分闸位置静触头导电杆摩擦力过大引起的.为保证变电站运行的稳定性,避免此类事件的再次发生,本文对220kV变电站开关合闸异常事件的处理相关措施进行了相应总结.

本文分析了一起500kV电容式电压互感器(CVT)二次电压异常的事件.文中介绍了CVT二次电压异常的事件概况和设备情况,并分别对设备进行了现场检查、监控后台检查、停电后现场检查以及返厂解体检查,找出CVT二次电压异常的原因为CVT的密封圈未装配到位使得下节电容器绝缘油渗漏导致电容单元露空,绝缘强度下降而被击穿.最后结合设备的选择、设备验收、设备的日常巡视以及高压试验给出了防范措施建议.

本文分析了一起某500?kv变电站主变上的电容器串联限流电抗器匝间短路的损坏事件.通过现场分析,结合一次、二次设备的历史检查数据、设备历史巡视记录和红外测温记录,根据前期该类型设备发生类似异常的原因进行事故分析总结.此次事件发生的原因不仅与设备本身老化有关还与设备在电网中的布置方式有关.本文针对此类事件分析并提出了处理和改进的措施,避免此类事件的再次发生,提高了变电站的稳定安全运行的能力.

A bus trip accident is analyzed in the course of operation for the spacing equipment after maintenance in some 1000 kV substatim.By field inspection, get the field feedback data of primary and secondary equipment and opening cover inspection record of the switch equipment.For the inspection contrast of totally-enclosed combined electrical apparatus switchgear A、B and C three-phase opening cover of the gas insulation and combining the basic diagram of the resistance switch structure and the field disintegration condition to carry out analysis and summary to the auident cause.According to the canse of the disintegration condition analysis is that the B phase side resistance contact fastening bolt of the switch is not fastened.For the accielent, put forward some measures, which ensures safe running ability of EHV substation.