一种新型的输电线路双端行波故障定位方法

A new fault location method of transmission lines based on double-terminal traveling wave

针对行波故障测距技术中行波检测准确性和行波波速对测距精度的影响,提出一种新的双端行波故障定位方法。首先,介绍了变分模态分解(Variational Mode Decomposition,VMD)和Teager能量算子(Teager Energy Operator,TEO)的特点,并将VMD与TEO相结合应用于故障行波波头的检测。其次,在双端行波故障测距原理的基础上,根据故障行波的传播路径,推导出一种不受行波波速和线路实际长度变化影响的行波故障测距新算法。该算法不需要检测行波反射波的波头,测距原理简单。最后,通过EMTDC仿真验证方法的正确性和准确性。大量的仿真结果表明该方法行波波头检测效果较好,测距准确度较高。

For the influence of traveling-wave detection accuracy and wave velocity on the location accuracy in traveling wave fault location technology, a new double-terminal traveling wave fault location method is proposed. First, the characteristics of Variational Mode Decomposition（VMD） and Teager Energy Operator（TEO） is introduced and applied to traveling wave detection. Second, by analyzing the propagation path of fault traveling wave, a new fault location algorithm that avoiding traveling wave velocity influence is deduced based on the principle of double-terminal traveling wave fault location, the wave head of traveling wave reflection does not need to detect using this algorithm, and its fault location principle is simple. Finally, EMTDC simulations prove that the method is correct and accurate. A lot of simulations results show that this method has better effect on traveling wave detection, and location accuracy is higher.