The mining of mining is inseparable from the investment of large-scale electrical equipment, and the degree of qualification of electrical energy directly affects the normal operation of the equipment.

Typical load of the mining industry:

Hoist: The hoist is equipped with a large single-machine power, which accounts for a large proportion of the total power supply load of the mine. As a high-power, frequent start, periodic impact load and the use of silicon rectifiers, the hoist causes great reactive power and high-order harmonic pollution to the power grid. Therefore, the high-power hoist puts higher demands on the capacity and stability of the power supply grid.

Long-distance transmission lines: During the coal mining process, a large number of roadway excavation equipment, ventilation equipment, and driving light electrical equipment are applied underground. In the mining process of non-open coal mines, long transmission lines are required to provide underground equipment. Power, long-distance power transmission brings high energy consumption, resulting in low terminal voltage.

Inverter and soft starter: The inverter or soft starter is configured to meet the requirements of improved starting shock and energy saving. Due to the use of the frequency converter, 6k±1 harmonics are generally generated.

1. Centralized management: DBL-AP7/ATP7 series reactive power compensation device + DBL-APF series active filter

Terminal local management: DBL-PQ terminal power quality device

2. Centralized management: DBL-AP7/ATP7 series reactive power compensation device + DBL-SVG static var generator + DBL-APF series active filter (DBL-AP7/ATP7 mixed with SVG)

Terminal local management: DBL-PQ terminal power quality device

3. (Recommended) centralized management: DBL-SVG static var generator + DBL-APF series active filter

Terminal local management: DBL-PQ terminal power quality device