【摘要】 为了研究交叉互联电缆系统的在线故障定位方法，建立交叉互联电缆的暂态仿真模型，研究不同模式波在交叉互联电缆系统中的传播特性，并结合该特性设计基于改进Hilbert-Huang变换的故障定位策略。结果表明：同轴模式波群具有最快的传播速度，且其在交叉互联电缆系统中的传播不受交叉连接方式的影响，可以利用双端法识别同轴模式波的到达时刻对故障进行定位；基于改进Hilbert-Huang变换及权信号强度判据对故障进行自动定位，克服了小波变换不具有自适应性的弊端，且定位精度良好。结合理论及仿真研究，在对交叉互联电缆进行在线故障定位时，建议采用双端法记录故障引起的暂态波的到达时刻，并采用改进Hilbert-Huang变换对采样信号进行分析，从而实现故障的在线定位。更多还原

【Abstract】 In order to study the online fault location method of cross-bonding cable system, the transient simulation model of cross-bonding cable was established, the propagation characteristics of different mode waves in cross-bonding cable system were studied, and a fault location strategy based on improved Hilbert-Huang transform was designed. The results show that the coaxial mode wave group has the fastest propagation speed, and its propagation in the cross-bonding cable system is not affected by the cross-bonding manner. The two-terminal method can be used to identify the arrival instances of coaxial mode waves to locate faults. Based on the improved Hilbert-Huang transform and the weighted signal strength criterion, the fault is located automatically, which overcomes the disadvantage of wavelet transform that is not adaptive, and the location accuracy is good. Combined with the theory and simulation research, it is suggested that the two-terminal method can be used to record the arrival instances of transient waves caused by faults, and the improved Hilbert-Huang transform can be used to analyze the sampled signals, so as to realize the online fault location.更多还原