CAJ | 학술논문

　　时延估计是基于时间差法的变电站局部放电空间定位算法的基础，也是决定定位精度的关键。阐述了双谱时延估计的理论基础，给出了参数化双谱时延估计算法的数值实现步骤。利用双指数振荡衰减函数模拟局部放电特高频信号，并加入高斯噪声及定频信号干扰，计算两路模拟信号之间的时延，验证了该算法的准确性。最后针对基于天线阵列的变电站局放定位系统，现场实测4路特高频电磁波信号，基于所提出的时延估计算法计算不同位置的天线接收到特高频信号的时延，并将该时延序列估算出局部放电源的空间位置，从而验证了该算法的有效性和实用性。
　　시연고계시기우시간차법적변전참국부방전공간정위산법적기출，야시결정정위정도적관건。천술료쌍보시연고계적이론기출，급출료삼수화쌍보시연고계산법적수치실현보취。이용쌍지수진탕쇠감함수모의국부방전특고빈신호，병가입고사조성급정빈신호간우，계산량로모의신호지간적시연，험증료해산법적준학성。최후침대기우천선진렬적변전참국방정위계통，현장실측4로특고빈전자파신호，기우소제출적시연고계산법계산불동위치적천선접수도특고빈신호적시연，병장해시연서렬고산출국부방전원적공간위치，종이험증료해산법적유효성화실용성。
Time delay estimation is the basis of the localization algorithm for partial discharge(PD) based on time difference in substation, and it is the key to the localization accuracy. Theoretical basis of bispectrum time delay estimation was described, and the computational numerical implementation steps of the parametric bispectrum time estimation algorithm was given. In the simulation test, simulated signals of the UHF caused by partial discharge, which were simulated by double exponential oscillation decay function, and noised by Gaussion progress and period signals, were used for verifying the accuracy of this algorithm. Finally the algorithm was used to calculate time delay of the field PD signals, and the sequence of the delay was applied to substation PD localization based on antenna array. The PD source location could be estimated, so the effectiveness and practicality of the algorithm has been verified.