Application of Energy-Saving Optimization Technology for Coal Mine Power Supply Systems

Shan Huang （ Ningxia Dongchang Industrial Group Co., Ltd, Yinchuan, Ningxia, 750408, China ）

Abstract

The coal mine power supply system serves as the "lifeblood" of mine production, accounting for 60% to 80% of the mine's total energy consumption. Issues such as equipment oversizing, low power factor, severe harmonic pollution, and irrational peak-valley electricity usage indicate significant energy-saving potential. This paper systematically analyzes the main energy consumption points and their causes in coal mine power supply systems, proposing an integrated energy-saving optimization framework based on reactive power compensation, harmonic mitigation, transformer economic operation, variable-frequency speed regulation, and peak-valley electricity management. Dynamic reactive power compensation can increase the power factor to above 0.95, while variable-frequency speed regulation achieves energy savings of 20% to 35% for fan and pump loads. Comprehensive energy-saving measures can yield an overall energy reduction of 15% to 25% in mine power supply systems.

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