论文标题
基于电磁瞬态卷积的故障位置方法考虑频率依赖性参数和有损地面
A Fault Location Method Based on Electromagnetic Transient Convolution Considering Frequency-Dependent Parameters and Lossy Ground
论文作者
论文摘要
随着电源系统的增长，对快速，精确的短路故障位置的需求对于确保安全和持续的电源供应越来越重要。在本文中，我们提出了一种使用电磁瞬时卷积（EMTC）的故障位置方法。我们通过在实际故障模拟中使用频率依赖性参数来评估多相功率线中幼稚的EMTC实现的性能，同时在预计数中使用常数参数。我们的结果表明，位置误差随着故障位置与测量位置之间的距离增加而增加。因此，我们采用相模化后采用空中模式瞬变来执行卷积，从而降低了频率依赖性和地面损失的影响。我们在不同的断层条件下的3相100公里传输线，径向分布网络和IEEE 9-BUS系统中进行数值实验。我们的结果表明，所提出的方法通过直接卷积的实际断层生成的瞬态信号和预存储的预算瞬态信号来实现可耐受的位置误差并有效地操作。
As the capacity of power systems grows, the need for quick and precise short-circuit fault location becomes increasingly vital for ensuring the safe and continuous supply of power. In this paper, we propose a fault location method that utilizes electromagnetic transient convolution (EMTC). We assess the performance of a naive EMTC implementation in multi-phase power lines by using frequency-dependent parameters in real fault simulation, while using constant parameters in pre-calculation. Our results show that the location error increases as the distance between the fault location and the measurement location increases. Therefore, we adopt the aerial mode transients after phase-mode transformation to perform the convolution, which reduces the influence of frequency-dependence and ground loss. We conduct numerical experiments in a 3-phase 100-km transmission line, a radial distribution network and IEEE 9-bus system under different fault conditions. Our results show that the proposed method achieves tolerable location errors and operates efficiently through direct convolution of the real fault-generated transient signals and the pre-stored calculated transient signals.
