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首页> 外文期刊>Electric power systems research >Online fault location on AC cables in underground transmission systems using sheath currents
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Online fault location on AC cables in underground transmission systems using sheath currents

机译：使用护套电流的地下传输系统中交流电缆的在线故障定位

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This paper studies online travelling wave methods for fault location on a crossbonded cable system using sheath currents. During the construction of the electrical connection to the 400 MW off shore wind farm Anholt, it was possible to perform measurements on a 38.4 km crossbonded cable system. At 31.4 km, all cables were accessible which made it possible to apply a fault using an arc free breaker and measure the travelling waves at each end of the cable. On a crossbonded cable system, the sheaths are short circuited and grounded at both ends. This makes possible the use of low voltage Rogowski coils if the sheath currents contain the necessary information for accurate fault location. In this paper, this is examined by analysis of field measurements and through a study of simulations. The wavelet transform and a visual inspection method are used and the accuracy is compared. Field measurements and simulations are compared for testing the reliability of using simulations for studying fault location methods.
机译：本文研究了使用护套电流的在线行波方法在交叉键合电缆系统上的故障定位。在与400 MW海上风电场Anholt进行电气连接的过程中，可以对38.4 km的交叉粘结电缆系统进行测量。在31.4 km处，所有电缆均可以访问，这使得使用无弧断路器进行故障并测量电缆两端的行波成为可能。在交叉连接的电缆系统上，护套两端短路并接地。如果护套电流包含准确定位故障所需的信息，则可以使用低压Rogowski线圈。在本文中，将通过现场测量分析和对模拟的研究来对此进行检查。使用小波变换和视觉检查方法，并比较精度。比较了现场测量和仿真，以测试使用仿真研究故障定位方法的可靠性。

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