摘要
当前针对谐波电能计量技术开展了大量研究,而含有电压波动与闪变畸变信号影响下的电能计量技术研究较少。文章构建了电压波动与闪变影响下的功率数学模型,推导功率的简化计算式,提出了基于小波包分解与重构的电压波动与闪变下的电能计量方法;利用Db45小波函数,采用5层小波包变换,进行电压波动与闪变影响下稳态、非稳态信号的有功与无功电能计量的仿真分析,实验结果证明了算法的可行性与准确性。
At present,a lot of researches on harmonic energy metering technology have been carried out,but less researches on the power metering technology which are influenced by voltage fluctuation and flicker distortion signal. In this paper,a power mathematical model under the influence of voltage fluctuation and flicker is constructed,and a simplified calculation formula is deduced. Also,a method of electric energy measurement is proposed based on wavelet packet decomposition and reconstruction influenced by voltage fluctuation and flicker. The simulation results demonstrate the feasibility and accuracy of the algorithm by taking advantage of the Db45 wavelet function and using the transformation of 5-layer wavelet packet. What’s more,a simulated analysis of active energy and reactive energy measurement of steady-state and non-steady-state signals is proceeded which is under the influence of voltage fluctuation and flicker.
作者
赵恒一
高云鹏
申丽曼
吴聪
陈石东
陈向群
Zhao Hengyi;Gao Yunpeng;Shen Liman;Wu Cong;Chen Shidong;Chen Xiangqun(School of Electrical and Information Engineering,Hunan University,Changsha 410082,China;Power Supply Service Center(Metric Center)of State Grid Hunan Electric Power Co.,Ltd.,Changsha 410004,China;Hunan Key Laboratory of Intelligent Electrical Measurement and Application Technology,Changsha 410004,China)
出处
《电测与仪表》
北大核心
2020年第1期121-130,共10页
Electrical Measurement & Instrumentation
基金
国家自然科学基金(51777061)
中国博士后科学基金(2016M602405)
湖南省自然科学基金(2016JJ2022)
贵州电网科技项目(GZKJXM20171048)
关键词
电压波动与闪变
电能计量
功率计算模型
小波包
分解与重构
voltage fluctuations and flicker
energy metering
power measurement model
wavelet packet
decomposition and reconstruction
