摘要
文中的工作为开关柜局放源的精确定位提供了理论基础,弥补了TEV法受测试位置影响较大的不足。研究了采用四通道传感器对开关柜局部放电进行精确定位的方法。研究表明利用双曲面法和空间网格搜索法能够实现对放电源的精确定位。基于精确定位结果,文中采用模拟退火算法及FDTD组合算法研究了放电源脉冲等效电流峰值I_0和局部放电脉宽τ的优化评估问题,从而为准确反映放电源的实际强度和有效评估开关柜绝缘状态提供了理论依据和新思路。
The results of this paper provide the theoretic foundation for locating partial discharge source precisely and makes up for the shortage of TEV. Finite-difference time-domain method （FDTD） is used to simulate the TEV signal on switchgear and precise location method is studied with four channel detection system. Research shows that using hyperboloid method and spatial grid search method can locate the PD source precisely. Furthermore, an optimization method which is used to estimate the equivalent pulse width and amplitude of Gaussian pulse source for simulating PD of switchgear is presented by combining the simulated annealing algorithm with the FDTD method. It can provide theoretical basis for calculating the real intensity of PD signal and switchgear insulation condition assess accurately with a new perspective.
出处
《高压电器》
CAS
CSCD
北大核心
2016年第4期139-144,151,共7页
High Voltage Apparatus
