Mining load characteristics
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Cement enterprises are a kind of high-power-consuming enterprises. The cost of electricity accounts for about one-third of the total cost of cement. Motor energy consumption accounts for more than 90% of the total load. Motor energy conservation is crucial. At present, low-power universal inverter has been widely used in domestic cement plants, high-power high-pressure pumps and fan loads have begun to adopt high-power high-voltage inverter. In the meantime, the heavy use of inverters also poses serious harmonic problems. Harness the problem of harmonic, help to improve the safety and reliability of the power supply system, help to reduce the power loss of the entire distribution system.
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solution
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For all low-voltage systems, configure low-voltage dynamic reactive power compensation device to absorb the main harmonic components in the system; In the serious pollution of low-voltage system, configure the parallel active power filter device; In the key load, intelligent hybrid filter compensation device to Achieve the best governance effect.
Mining load characteristics
■ Hoist load characteristics: The industry, the widespread use of mine hoist, all kinds of grinder, crusher, ball mill, electric shovel class load.
◆ A typical time-varying load, active and reactive power fluctuations, easily lead to voltage fluctuations and flicker;
◆ drive inverter generates a large number of harmonics; low power factor;
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solution
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Selection of high-voltage dynamic reactive power compensation device, the filter channel generally configured 3 times, 5 times, 7 times and 11 times.
In general, in the system of large power grid, using high voltage passive filter compensation device can filter out its characteristic harmonics, to meet the governance goals. If the grid system is small, the goal of harmonic control is high. In addition to installing large-capacity passive filter devices, small-capacity active filters can be mixed to achieve the higher requirements of power quality management. For different rectifier rectifier system wiring system, our professional filter compensation device has a different targeted design, after field testing, users can "tailor-made" to take the most practical on-site management programs.
