一种新型的输电线路双端行波故障定位方法

发布时间：2018-07-31 10:14

【摘要】：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。
[Abstract]:Aiming at the influence of traveling wave detection accuracy and traveling wave velocity on location accuracy in traveling wave fault location technology, a new dual-terminal traveling wave fault location method is proposed. Firstly, the characteristics of variational mode decomposition (Variational Mode DecompositionVMD) and Teager energy operator (Teager Energy operator (TEO) are introduced, and the combination of VMD and TEO is applied to the detection of fault wave heads. Secondly, on the basis of the principle of two-terminal traveling wave fault location, a new traveling wave fault location algorithm is derived based on the propagation path of the fault traveling wave, which is independent of the variation of the traveling wave velocity and the actual length of the line. This algorithm does not need to detect the wave head of traveling wave reflection wave, and the principle of ranging is simple. Finally, the correctness and accuracy of the method are verified by EMTDC simulation. A large number of simulation results show that this method has good detection effect and high ranging accuracy.
【作者单位】：新能源电力系统国家重点实验室(华北电力大学);河北工程大学水电学院;
【基金】：中央高校基本科研业务费专项资金资助项目(2014xs74)~~
【分类号】：TM75

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