摘要
提出了先确定变压器两测量端信号能量比值与放电位置的关系曲线,用放电后测算得的信号能量比值确定放电位置的方法。仿真和试验表明,<1 MHZ放电信号的能量比值具有良好的位置特性,其定位特征量的误差<10%。
To locate partial discharge （PD） source in power transformer by electrical way, a method based on the energy ratio at different terminals is proposed. The relationship curve between energy ratio of signals and PD location is determined. After PD happens and signals are measured, the ratio is calculated for locating PD through the curve. Simulation analysis with a numerical model and imitating experiment on transformer winding are carried out. It is found that the ratio of PD energy under 1 MHz possesses a good characteristic to the position. The relationship can be predigested to a simplified representation for a convenient use in the field. Results indicate that the locating accuracy of these methods, with the error less than 10%, is satisfied for engineering practice use.
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2006年第1期38-39,53,共3页
High Voltage Engineering
关键词
局部放电
变压器
定位
信号能量
partial discharge
transformer
locating
signal energy
