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| 谐波存在时的改进电能计量方法及应用 | |
| 引用本文： | 温和,滕召胜,胡晓光,王永,曾博.谐波存在时的改进电能计量方法及应用[J].仪器仪表学报,2011,32(1). |
| 作者姓名： | 温和 滕召胜 胡晓光 王永 曾博 |
| 作者单位： | 1. 湖南大学电气与信息工程学院,长沙,410082;北京航空航天大学自动化科学与电气工程学院,北京,100191 2. 湖南大学电气与信息工程学院,长沙,410082 3. 北京航空航天大学自动化科学与电气工程学院,北京,100191 |
| 基金项目： | 国家自然科学基金，中国博士后科学基金，高等学校博士学科点专项科研基金(新教师类) |
| 摘 要： | 为减少谐波存在时的电能计量误差,本文提出一种基于三角自卷积窗的改进谐波电能频域计量算法.首先,采用三角自卷积窗对电压、电流信号进行加权处理,以抑制频谱泄漏和谐波间相互干扰;其次,运用插值FFT算法从频域实现电压、电流信号参数(频率、幅值和相位)的高精度估计值;最后,根据Budeanu给出的谐波电能定义,结合电压、电流信号参数实现谐波电能计量.非同步采样情况下,分别采用典型余弦组合窗(Hanning窗、Blackman-Harris窗与Rife-Vincent窗)和4阶三角自卷积窗进行谐波电能计量的仿真实验结果表明:采用三角自卷积窗函数可克服白噪声和基波频率波动影响,提高了谐波电能计量准确度.本文算法在三相多功能谐波电能表中的应用证明了其有效性和准确性. |
| 关 键 词： | 电能计量 谐波 窗函数 频谱泄漏 |
Improved electric power measurement method and its application while harmonic exists |
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| Wen He,Teng Zhaosheng,Hu Xiaoguang,Wang Yong,Zeng Bo.Improved electric power measurement method and its application while harmonic exists[J].Chinese Journal of Scientific Instrument,2011,32(1). | |
| Authors: | Wen He Teng Zhaosheng Hu Xiaoguang Wang Yong Zeng Bo |
| Affiliation: | Wen He1,2,Teng Zhaosheng1,Hu Xiaoguang2,Wang Yong1,Zeng Bo1(1 College of Electrical and Information Engineering,Hunan University,Changsha 10082,China,2 School of Automation Science and Electrical Engineering,Beijing University of Aeronautics & Astronautics,Beijing 100191,China) |
| Abstract: | To reduce the electric power measurement error caused by harmonics,an improved electric power measurement method based on triangular self-convolution window is presented in this paper.First,the sampled voltage and current signals are weighted by triangular self-convolution window.Then,the harmonic parameters of voltage and current signals are estimated with windowed interpolated FFT algorithm.Last,the electric power of harmonics can be measured using Budeanu's definition.Simulation experiments were carried ... |
| Keywords: | FFT |
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