摘要
海底电缆因复杂安置环境及运行时的不确定与干扰因素,易发生局部放电。放电产生的特高频信号本身幅值很小,极易被海底环境的背景噪声所淹没,且在长距离传输中显著衰减,进一步增加了检测的难度。针对海底电缆局部放电特高频提出一种时差定位法。利用时差定位法计算得到局部放电特高频信号到达不同传感器的时间差,并将此和距离函数作为寻优函数代入到粒子群优化算法中展开寻优计算,得到局部放电源到达各个空间的距离函数。经过等价交换后进一步收敛,当函数值始终保持最小值时,输出精准的局部放电源位置。实验结果表明,所提方法可在保证较高精度的前提下,实现对电缆局部放电特高频的定位。
Submarine cables are prone to partial discharges due to the complex placement environment and the uncertainty and interference factors during operation.The ultra-high frequency(UHF)signals generated by electrical discharge inherently possess a very small amplitude,which is easily submerged by the background noise of the submarine environment and significantly attenuated in long-distance transmission,further increasing the difficulty of detection.A time-difference localization method is proposed for submarine cable partial discharge UHF.Using the timedifference localization method to calculate the time difference between the UHF signal of partial discharge arriving at different sensors,and substituting this and the distance function as the optimization function into the particle swarm optimization algorithm to unfold the optimization computation,and obtain the distance function of the partial discharge power source arriving at each space.After further convergence after the equivalence exchange,when the function value always maintains the minimum value,the accurate position of the local discharging power source is output.The experimental results show that the proposed method can realize the localization of UHF cable partial discharge under the premise of ensuring high accuracy.
作者
孟令军
周鲁川
王柏森
翟迎新
MENG Ling-jun;ZHOU Lu-chuan;WANG Bo-sen;ZHAI Ying-xin(China Petroleum and Chemical Corporation Shengli Oilfield Branch Offshore Oil Production Plant,Dongying Shandong 257237,China)
出处
《计算机仿真》
2025年第4期88-92,共5页
Computer Simulation
基金
中石化胜利海上高效酸化解堵及安全在线返排处理项目(P21093)。
关键词
局部放电
时差定位
寻优计算
粒子群优化算法
距离函数
Partial discharge
Time difference localization
Optimization computation
Particle swarm optimization algorithm
Distance function
