王振浩,熊毅,龙超,庞丹,李国庆.基于伪信号起始时刻法代数求解的变电站局放定位[J].电测与仪表,2017,54(8):. WANG Zhenhao,XIONG Yi,LONG Chao,PANG Dan,LI Guoqing.Partial Discharge Location in Substation Based on Algebraic Solution to Pseudo-time of Signal[J].Electrical Measurement & Instrumentation,2017,54(8):.
基于伪信号起始时刻法代数求解的变电站局放定位
Partial Discharge Location in Substation Based on Algebraic Solution to Pseudo-time of Signal
The measurement of partial discharges(PD) is a non-destructive and sensitive diagnostic tool for the condition assessment of insulating systems, and an effective method to detect the defects and avoid the breakdown failure of insulating systems. Type determination and location of the PD are amongst others tremendously important for scheduling and starting maintenance/repair actions cost and time efficiently or to perform a risk analysis. In this paper, the high frequency electromagnetic wave signal(UHF signal), radiation emitted when PD happened, was used to locate the PD: the pseudo-time of signal arrival was determined by the UHF signal after the improved energy accumulation function; algebraic solution method for static pseudo-range equation was used to solve the nonlinear equations of PD coordinates established with pseudo-time of signal arrival method, avoiding the iterative algorithm dependence on the initial value, ensure the accuracy of calculation and improved the calculation speed. Finally, the rationality and effectiveness of the proposed method were verified by site tests.
