摘要
对某公司18台35 kV静止无功发生器(SVG)设备运行数据的分析表明,设备故障主要包括功率模块散热不良、电缆绝缘击穿、控制保护装置异常和电网波动4类问题。其中,功率模块故障占41%,电缆故障占23%,沙柳变电站SVG闭锁次数超过50次。对SVG功率模块实施N+2冗余配置方案,通过将谐波保护定值从5%上调至5.8%来优化运行参数,并制定设备季度检修维护制度,使设备故障率下降59%,系统可用率增长12个百分点,SVG闭锁次数减少80%。这些运维经验对提升SVG设备运行可靠性具有重要参考价值。
An analysis of the operational data from 18 sets of 35 kV Static Var Generator(SVG)at a certain company reveals that equipment failures mainly involve four categories of issues:inadequate heat dissipation in power modules,cable insulation breakdown,abnormalities in control and protection devices,and grid fluctuations.Among these,power module failures account for 41%,cable failures account for 23%,and the SVG at Shaliu Substation experienced more than 50 lockout incidents.By implementing an N+2 redundancy configuration scheme for SVG power modules,optimizing operational parameters through raising the harmonic protection setting from 5%to 5.8%,and establishing a quarterly equipment maintenance system,the equipment failure rate is decreased by 59%,the system availability is increased by 12 percentage points,and the number of SVG lockout incidents is reduced by 80%.These operation and maintenance experiences hold significant reference value for enhancing the operational reliability of SVG equipment.
作者
张举志
ZHANG Juzhi(Ultra High Voltage Company,State Grid Qinghai Electric Power Company,Xining,Qinghai 810000,China)
出处
《自动化应用》
2025年第22期161-163,167,共4页
Automation Application
