Broadband impedance spectroscopy (BIS) provides a new method for cable fault location, however, this method has not been properly used in locating cable fault of cross-bonded (CB) cables due to the geometric discontinuity of impedance spectroscopy measurement loop. This study addresses the possibility of fault location by BIS in CB cables. First, this paper proposes a fault location method by transforming BIS in frequency domain into the location function in space domain with the aid of integral transformation (IT). The kernel function ej2βx is used to obtain fault location function. Second, this paper demonstrates an impedance spectroscopy measurement loop in CB cables. BIS in CB cables is observed having a generalized orthogonality with the kernel function ej2βx. Given this, the IT method is applicable for fault location of CB cables. Finally, this study carries out the location experiment of cable joints on a 110 kV CB cable in cable trench. The experiment shows that BIS in CB cables could be obtained by the loop proposed in this paper. Besides, the results verify the possibility of fault location in CB cables by IT method using BIS.

中文翻译：

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利用宽带阻抗谱进行交叉连接电缆故障定位的可能性


宽带阻抗谱(BIS)为电缆故障定位提供了一种新的方法，但由于阻抗谱测量回路的几何不连续性，该方法尚未正确应用于交叉连接(CB)电缆的电缆故障定位。本研究探讨了通过 BIS 对 CB 电缆进行故障定位的可能性。首先，本文提出一种借助积分变换（IT）将频域BIS变换为空间域定位函数的故障定位方法。核函数ej2βx用于获取故障定位函数。其次，本文演示了 CB 电缆中的阻抗谱测量回路。观察到 CB 电缆中的 BIS 与核函数 ej2βx 具有广义正交性。鉴于此，IT方法适用于CB电缆的故障定位。最后，本研究对电缆沟内110 kV CB电缆进行了电缆接头定位实验。实验表明，CB电缆中的BIS可以通过本文提出的环路获得。此外，结果验证了利用BIS的IT方法对CB电缆进行故障定位的可能性。