AC-DC interconnected mine power grid power supply system and power supply recovery control method
A grid power supply and power supply recovery technology, applied in the direction of AC network circuit, AC network load balancing, single AC network with different frequencies, etc. The effect of increasing capacity, improving redundancy and security, and ensuring reliability
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[0030] The control method of the AC-DC interconnected mine grid power supply system is as follows: when the system is in normal operation, for the ground substation part of the AC bus A, the main and auxiliary shaft hoists, air compressors and ventilators and other loads work normally; the underground central substation In the power substation, the 10kV voltage received is reduced to 660V and 380V through mine transformers, which are supplied to the low-voltage power equipment near the underground parking lot, including cart machines and small water pumps, and are supplied to high-voltage equipment, rectifier equipment and mining equipment. The mining area substation is located in the center of the mining area's electrical load, which converts high voltage into low voltage and distributes this voltage to all mining working faces and other electrical equipment in the mining area. For the DC bus B, connect the photovoltaic power generation system through a bidirectional DC / DC con...
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