Design of Anti-override Trip in Coal Mine Underground Power Supply System
Actively improving the power supply network and ensuring electrical safety underground in coal mining has a positive impact.Based on the high voltage power grid trip protection system of some coal mines,it is necessary to optimize the design of the protection system while the protection function needs to be improved.To this end,based on the underground mining operation of A Coal Mine,the factors that cause override trip were first proposed.Then,starting from the protection system,the overall anti-override trip scheme was analyzed based on digital fiber optic current longitudinal differential technology,and optimized design was carried out from the aspects of main hardware structure,software operation,and operation and maintenance management.Finally,through testing of the protection system,it was found that the power supply system's ability to prevent override trip has significantly improved.
coal miningpower supply systemanti-override tripprotection system
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