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<p>Substation line losses vary with the number of connected PV units due to power flow changes. To ensure the accurate line-loss rate calculations, this study investigates a novel computation method for grid-connected PV systems that accounts for power flow variations. The proposed method employs an improved K-medoids clustering algorithm for substation area classification, optimized by an enhanced Cuckoo algorithm to minimize classification errors. Based on PV integration data, the power flow calculation model (using MPPT control) categorizes substations into single-PV-integrated and multi-PV-integrated types to analyze post-connection power flow changes. Through simulation tests, the maximum MAPE of this method is only 0.5% for both cases. The method achieves high-accuracy line-loss rate calculations while considering power flow variations after PV integration.</p>

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Calculation method of line loss rate of substation areas considering tidal current variation with photovoltaic power generation access

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年4月30日

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  • Shengbo Sun,
  • Chao Cheng,
  • Shujun Ji,
  • Wei Cui,
  • Wei Ge,
  • Shifang Hao

摘要

Substation line losses vary with the number of connected PV units due to power flow changes. To ensure the accurate line-loss rate calculations, this study investigates a novel computation method for grid-connected PV systems that accounts for power flow variations. The proposed method employs an improved K-medoids clustering algorithm for substation area classification, optimized by an enhanced Cuckoo algorithm to minimize classification errors. Based on PV integration data, the power flow calculation model (using MPPT control) categorizes substations into single-PV-integrated and multi-PV-integrated types to analyze post-connection power flow changes. Through simulation tests, the maximum MAPE of this method is only 0.5% for both cases. The method achieves high-accuracy line-loss rate calculations while considering power flow variations after PV integration.