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杨莹,张兴,李明.不平衡及谐波电网下基于多模块复数滤波器的电网阻抗检测方法[J].电源学报,2018,16(2):69-75
不平衡及谐波电网下基于多模块复数滤波器的电网阻抗检测方法
Grid Impedance Detection Method under Unbalanced and Harmonic Grid Voltage Based on Multiple Complex Coefficient Filters
投稿时间:2017-11-29  修订日期:2018-02-26
DOI:10.13234/j.issn.2095-2805.2018.2.69
中文关键词:  电网阻抗  多模块复数滤波器  非特征次谐波注入
英文关键词:grid impedance  multiple complex coefficient filters  uncharacteristic harmonic injection
基金项目:国家重点研发计划资助项目(2016YFB0900300);国家自然科学基金资助项目(51677049)
作者单位E-mail
杨莹 合肥工业大学电气与自动化工程学院, 合肥 230009 1014334465@qq.com 
张兴 合肥工业大学电气与自动化工程学院, 合肥 230009  
李明 合肥工业大学电气与自动化工程学院, 合肥 230009  
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中文摘要:
      为保证电网不平衡及电网背景谐波情况下快速获取准确的电网阻抗信息,提出了一种基于多模块复数滤波器MCCF(multiple complex coefficient filters)和非特征次谐波注入的电网阻抗检测方法。所提电网阻抗检测方法使用MCCF实现对公共耦合点电压非特征次谐波分量和电流非特征次谐波分量的准确提取,从而计算得出电网阻抗的阻性分量和感性分量。研究了在电网不平衡及电网背景谐波情况下MCCF提取非特征次谐波的基本原理及设计方法,并从提取精度和动态性能等方面对MCCF的参数进行了优化设计,最后仿真验证了所提电网阻抗检测方法的可行性和有效性。
英文摘要:
      For the purpose of acquiring the accurate value of grid impedance rapidly under unbalanced grid voltage and background harmonics, a grid impedance detection method is proposed based on multiple complex coefficient filters(MCCF) and uncharacteristic harmonic injection. MCCF is applied to accurately extract the uncharacteristic harmonic components of the voltage and current at the point of common coupling, and further calculate the resistive and inductance components of grid impedance. The basic principle and design method for extracting uncharacteristic harmonics through MCCF are studied, and the optimization design of MCCF parameters is performed from aspects of extraction accuracy and dynamic performance. Finally, simulation results verify the feasibility and effectiveness of the proposed grid impedance detection method.
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