Discussion on the Voltage Drop Problem of Long-distance Power Supply for Coal Winning Machines
ZHU Hongqiang
LÜ Xiao
WANG Yan
Abstract：With the continuous increase of power supply distance for underground coal winning machines,the problem of voltage drop affecting the normal operation of coal winning machines is becoming increasingly prominent.The problems caused by long-distance power supply to coal winning machines were analyzed,the calculation method of voltage drop for long-distance power supply of coal winning machines was studied,and solutions were proposed such as reasonably increasing the cross-sectional area of the main cable of the coal winning machine and adding a contactor to start the backup power supply,which can provide reference for ensuring the reliable operation of coal winning machines with long-distance power supply.
Keywords：underground coal winning machinelong-distance power supplypressure drop calculationcablebackup power supply
Publication Date：2025-04-30
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 41-44 )