基于优化的时滞叠加法提取谐波电压下MOA阻性泄漏电流

MOA Resistive Leakage Current Extraction under Harmonic Voltage Based on Optimized Time-Delay Superposition Method

目前金属氧化物避雷器(MOA)的主要监测技术是基于阻性泄漏电流谐波分析,因此从总泄漏电流中提取阻性电流成分至关重要。针对时滞叠加法只能在纯正弦波电压下提取阻性电流成分的缺陷,本文对时滞叠加法进行了优化,使其能够在谐波电压下准确提取MOA阻性泄漏电流成分。为了研究优化算法的性能,使用ATP-EMTP对MOA进行仿真,然后分别用两种算法在谐波电压下提取阻性泄漏电流并与实验结果进行对比。结果表明,提出的优化算法能够更准确地在谐波电压下提取阻性泄漏电流成分。

Up to now, the main monitoring techniques of metal oxide arrester are based on harmon-ics analysis of resistive leakage current component. Therefore, it＇ s crucial to extract resistive componentfrom total leakage current. In this paper, an optimized time-delay superposition method is proposedwhich is able to extract resistive component of metal oxide arrester under harmonic voltage. In order to in-vestigate the ability of proposed algorithm, a MOA has been simulated in ATP-EMTP software and the re-sistive component extracted under harmonic voltage by both algorithms has been compared with the exper-imental results in this paper. Results show that the proposed method is perfect to extract resistive compo-nent under harmonic voltage than previous one.