微电网谐波谐振的模态检测法研究  

Study on Modal Survey Method of the Harmonic Resonance in Micro-grid

作　　者：艾欣[1] 雷之力[1] 崔明勇[1] 

机构地区：[1]华北电力大学电气与电子工程学院,北京市昌平区102206

出　　处：《中国电机工程学报》2009年第S1期55-60,共6页Proceedings of the CSEE

基　　金：国家重点基础研究发展计划项目(973项目)(2009CB219706);高等学校学科创新引智计划项目(B08013)~~

摘　　要：微电网技术正受到越来越广泛的关注,为保证微电网的安全稳定运行,采用恰当的谐波谐振检测方法十分重要。由于自身的技术特点,微电网谐波谐振问题呈现谐振构成原因复杂、谐振频率分布广、元件参数变化快的特点。传统电力系统谐波谐振检测方法存在分析速度慢、检测范围有限的缺点,难以适应微电网环境下的谐波谐振检测。模态分析法是一种新的谐振分析方法,提出将模态分析法应用于微电网谐波谐振检测中,新方法可快速检测出微电网中存在的所有谐波谐振频率及其出现位置,并能够适应微电网元件参数快速变化的特点。根据模态分析法的检测结果可有针对性地采取措施以改善谐波谐振危害。基于PSCAD的仿真结果表明所提出的方法是合理有效的。Micro-grid technology has drawn more and more attention in recent years.It is very important that choosing an appropriate survey method of harmonic resonance to guarantee the stabilizing and compatible operation of the micro-grid.because unique features of micro-grid technology, harmonic resonance in micro-grid reveals some new characteristics,such as complication of sources consisting in the resonance,width of resonance frequency spread in frequency spectrum,and parameter of elements participating the resonance changing rapidly.The traditional harmonic resonance analysis methods have some disadvantages,such as long time of analyzing progress and limited measure area. Traditional resonance analysis method cannot be applied to the harmonic resonance survey properly because of those shortcomings.In this paper a new resonance analysis method, modal analysis,is introduced into harmonic resonance survey in micro-grid.All of the harmonic resonance of the micro-grid could be found by the proposed method in very short time. Even with rapid changing of elements' parameters,the survey would be concluded with effective results by the proposed method in time.According to the survey results,proper measures can be taken place to improve the harmonic resonance in micro-grid.the method proposed in this paper can be approved to be rational and effective by the simulations results based on PSCAD.

关 键 词：微电网 谐波谐振 模态检测 可再生能源 

分 类 号：TM711[电气工程—电力系统及自动化]