Electrical Harmonic Energy Measurement Based on Wavelet Packet Decomposition and Reconstruction Algorithm

  • Mengshuang Liu Electric Power Research Institute of State Grid Xinjiang Electric Power Co., Ltd., Xinjiang, Urumqi 830000, China
  • Xudong Shi Electric Power Research Institute of State Grid Xinjiang Electric Power Co., Ltd., Xinjiang, Urumqi 830000, China
  • Chen Yang Electric Power Research Institute of State Grid Xinjiang Electric Power Co., Ltd., Xinjiang, Urumqi 830000, China
Keywords: Harmonic energy, Wavelet packet decomposition and reconstruction, Electric harmonic

Abstract

In order to study the accurate measurement of electric energy in complex industrial field, a method of harmonic electric energy measurement based on wavelet packet decomposition and reconstruction algorithm, as well as the calculation formula of harmonic power and the principle of harmonic electric energy measurement are proposed. Using db42 wavelet function to carry out harmonic energy metering simulation analysis, the results show that: The fundamental frequency of the simulation signal is 50 Hz, two-layer wavelet packet transform is adopted, the simulation input signals within 40 fundamental wave cycles are taken, and the sampling frequency fs is 800 Hz. Conclusion: The three-phase harmonic energy metering device based on virtual instrument technology has realized the measurement of each harmonic active power and reactive power, and the accuracy reaches 0.2 s.

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Author Biographies

Mengshuang Liu, Electric Power Research Institute of State Grid Xinjiang Electric Power Co., Ltd., Xinjiang, Urumqi 830000, China

Mengshuang Liu, male, undergraduate, he now is an engineer working in Electric Power Research Institute of State Grid Xinjiang Electric Power Co., Ltd. His research direction is power metering and collection and operation.

Xudong Shi, Electric Power Research Institute of State Grid Xinjiang Electric Power Co., Ltd., Xinjiang, Urumqi 830000, China

Xudong Shi, male, undergraduate, he now is an senior engineer working in Electric Power Research Institute of State Grid Xinjiang Electric Power Co., Ltd. His research direction is measurement management, line loss management and power marketing.

Chen Yang, Electric Power Research Institute of State Grid Xinjiang Electric Power Co., Ltd., Xinjiang, Urumqi 830000, China

Chen Yang, male, his degree is bachelor, he now is an assistant engineer working in Electric Power Research Institute of State Grid Xinjiang Electric Power Co., Ltd. His research direction is power marketing and information management.

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Published
2021-11-18
Section
Renewable Power and Energy Systems