| 基于HHT变换的微网电压闪变与谐波检测新技术 |
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| 引用本文： | 费丽强,李鹏,李晓春,赵娜,叶飞. 基于HHT变换的微网电压闪变与谐波检测新技术[J]. 电网与水力发电进展, 2011, 27(11): 9-12 |
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| 作者姓名： | 费丽强 李鹏 李晓春 赵娜 叶飞 |
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| 作者单位： | 1. 华北电力大学新能源电力系统国家重点实验室,河北保定,071003
2. 大连理工大学,辽宁大连,116024 |
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| 基金项目： | 国家自然科学基金资助项目（50977029） |
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| 摘 要： | 微网中大规模的分布式电源由于其自身特点及大量电力电子设备的使用,容易引起电网电压波动、电压闪变及谐波等电能质量问题,影响电力用户的供电要求。利用HHT(Hilbert-Huang transform)变换方法对微网中的电压闪变、谐波等电能质量扰动信号进行了EMD分解,得到各IMF分量,通过对IMF分量进行Hilbert谱分析和边际谱分析。仿真结果表明,该方法能快速有效地检测出微网中电压闪变信号的频率和幅值及谐波信号产生及终止的时刻。
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| 关 键 词： | 微网 HHT 电压闪变 谐波检测 |
A New Detection Technology of Voltage Flicker and Harmonics in Microgrid Based on HHT Transformation |
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| FEI Li-qiang,LI Peng,LI Xiao-chun,ZHAO Na and YE Fei. A New Detection Technology of Voltage Flicker and Harmonics in Microgrid Based on HHT Transformation[J]. Advance of Power System & Hydroelectric Engineering, 2011, 27(11): 9-12 |
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| Authors: | FEI Li-qiang LI Peng LI Xiao-chun ZHAO Na YE Fei |
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| Affiliation: | State Key Laboratory of New Energy Power System, North China Electric Power University, Baoding 071003, Hebei Province, China;State Key Laboratory of New Energy Power System, North China Electric Power University, Baoding 071003, Hebei Province, China;State Key Laboratory of New Energy Power System, North China Electric Power University, Baoding 071003, Hebei Province, China;Dalian University of Technology, Dalian 116024, Liaoning Province, China.;State Key Laboratory of New Energy Power System, North China Electric Power University, Baoding 071003, Hebei Province, China |
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| Abstract: | Due to thei own characteristics of distributed resources and a large number of power electronic devices used in microgrid, voltage fluctuations, voltage flicker and harmonics and other power quality problems often occur, causing negative impacts on power users. In this paper, voltage flicker, harmonics and other disturbance signals are decomposed into IMF components by EMD of HHT transformation to obtain the corresponding IMF component and the Hilbert spectrum and marginal spectrum of the IMF component is analyzed. Simulation results show that by this method, the frequency and amplitude of voltage flicker and the generation and termination moment of harmonic signal in microgrid can be detected efficiently. |
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| Keywords: | microgrid HHT voltage flicker harmonics detection |
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