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Calculation Method of Theoretical Line Loss in Low-Voltage Grids Based on Improved Random Forest Algorithm

Author

Listed:
  • Li Huang

    (School of Electrical Engineering, Southeast University, Nanjing 211189, China)

  • Gan Zhou

    (School of Electrical Engineering, Southeast University, Nanjing 211189, China)

  • Jian Zhang

    (Guangdong Power Grid Co., Guangzhou 510600, China)

  • Ying Zeng

    (Guangdong Power Grid Co., Guangzhou 510600, China)

  • Lei Li

    (School of Electrical Engineering, Southeast University, Nanjing 211189, China)

Abstract

Theoretical line loss rate is the basic reference value of the line loss management of low-voltage grids, but it is difficult to calculate accurately because of the incomplete or abnormal line impedance and measurement parameters. The traditional algorithm will greatly reduce the number of samples that can be used for model training by discarding problematic samples, which will restrict the accuracy of model training. Therefore, an improved random forest method is proposed to calculate and analyze the theoretical line loss of low-voltage grids. According to the Influence mechanism and data samples analysis, the electrical characteristic indicator system of the theoretical line loss can be constructed, and the concept of power supply torque was proposed for the first time. Based on this, the attribute division process of decision tree model is optimized, which can improve the limitation of the high requirement of random forest on the integrity of feature data. Finally, the improved effect of the proposed method is verified by 23,754 low-voltage grids, and it has a better accuracy under the condition of missing a large number of samples.

Suggested Citation

  • Li Huang & Gan Zhou & Jian Zhang & Ying Zeng & Lei Li, 2023. "Calculation Method of Theoretical Line Loss in Low-Voltage Grids Based on Improved Random Forest Algorithm," Energies, MDPI, vol. 16(7), pages 1-16, March.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:7:p:2971-:d:1106415
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    References listed on IDEAS

    as
    1. Hu, Wei & Guo, Qiuting & Wang, Wei & Wang, Weiheng & Song, Shuhong, 2022. "Loss reduction strategy and evaluation system based on reasonable line loss interval of transformer area," Applied Energy, Elsevier, vol. 306(PB).
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