金属氧化物避雷器在线监测的谐波校正及研究

发布时间：2018-05-14 05:09

  本文选题：金属氧化物避雷器 + 谐波电压　； 参考：《电子测量与仪器学报》2017年10期

【摘要】：泄漏电流阻性分量是金属氧化物避雷器(MOA)在线监测的重要指标,传统的容性电流补偿算法并未考虑谐波电压的作用,对监测结果产生很大的误差。为解决该问题,利用电压过零时避雷器阻性电流与容性电流的关系求解避雷器晶介电容C,并推导了谐波电压下的容性电流补偿系数G,提出了一种金属氧化物避雷器在线监测的谐波电压校正方法,有效降低谐波电压对阻性电流提取的影响,提高避雷器阻性电流的提取精度。MATLAB仿真结果表明,通过MOA在线监测谐波校正方法,避雷器晶介电容C、基波阻性电流分量i_(R1)、3次谐波阻性电流分量i_(R3)误差均≤10%,有效地减小谐波电压给监测结果带来的影响,降低了阻性电流提取的误差,提高了避雷器在线监测结果的准确性。
[Abstract]:Leakage current resistive component is an important index for on-line monitoring of metal oxide arresters (MOA). The traditional capacitive current compensation algorithm does not consider the effect of harmonic voltage and has great error to the monitoring results. To address the problem, Based on the relationship between the resistive current and capacitive current of the arrester over 00:00 voltage, the dielectric capacitance of the arrester crystal is solved, and the compensation coefficient G of capacitive current under harmonic voltage is derived, and a kind of harmonics for on-line monitoring of metal oxide arrester is proposed. Wave voltage correction method, Effectively reduce the influence of harmonic voltage on resistance current extraction, improve the precision of arrester resistance current extraction. MATLAB simulation results show that the harmonic correction method is monitored by MOA on-line. The crystal dielectric capacitance (C) of the arrester and the fundamental wave resistive current component I _ (1) / I _ (1) are all less than 10 ~ (th), which can effectively reduce the influence of harmonic voltage on the monitoring results and reduce the error of the current extraction. The accuracy of the on-line monitoring results of the arrester is improved.
【作者单位】： 南京信息工程大学气象灾害预报预警与评估协同创新中心;南京信息工程大学中国气象局气溶胶与云降水重点开发实验室;
【基金】：国家自然科学基金(61671248,41605121) 江苏省高校自然科学研究重大项目(15KJA460008) 江苏省“六大人才高峰”计划 江苏省“信息与通信工程”优势学科资助
【分类号】：TM862
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本文编号：1886473