摘要
水电厂最优维护系统(HOMS)集成环境实时获取电压、频率、负荷、电流等变压器局放相关状态量,可为局放集成监测和关联分析提供优越的平台。为解决孤立的局放监测没有考虑相关状态量对局放的影响而降低局放分析结果的准确性的问题,在HOMS集成环境下,建立了变压器局放超高频在线监测系统;开展了局放与相关状态量的关联分析,包括①瞬态工况下由冲击电压引起的随机性放电分析,②稳定工况下由工频电压引起的周期性放电分析;总结了瞬态过程中局放的变化特征。目前该系统已应用于葛洲坝电厂4台变压器,监测数据分析验证了其局放分析结果的准确性。
As the operating states relevant to partial discharges （PDs） are not considered by isolated PD monitoring, the reliability of PD measuring results is reduced. The PD relevant states, such as operating voltage, frequency, load and current, etc , can be captured by the integrated condition monitoring and diagnostics framework of HOMS （Hydropower plant Optimal Maintenance System）, which provides an excellent platform for integrated monitoring and association analysis of transformer PDs. Under the integrated framework of HOMS, an online ultra high frequency （UHF） PD monitoring system for transformer is developed. The association analysis of PDs is performed as follows： （a） periodical PDs caused by power frequency voltage under stable operating conditions; （b） stochastic PDs caused by transient over-voltages under unstable operating conditions. The characteristics of PD activities with respect to relevant states are studied with the aid of the integrated framework of HOMS. At present, the system has been applied to 4 power transformers, and the reliability of PD analyzing results is verified by the analysis of large mount of onsite data.
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2010年第8期1975-1980,共6页
High Voltage Engineering
关键词
变压器
局部放电(局放)
超高频
在线监测
集成监测
关联分析
transformer
partial discharge （PD）
ultra high frequency （UHF）
online monitoring
integrated moni toring
association analysis
