Improvement of control scheme of peak load shafting of coal mine drainage system

For problem that pumps start and stop frequently in existing control scheme of peak load shafting of coal mine drainage system, the paper proposed a improved scheme by adding water levels, raising number of activated pumps, increasing a trough adjustment period and the last adjustment period. It introduced principles of peak load shafting and implementation of the improved scheme, compared and analyzed control effects of the original scheme and the improved scheme. The testing results show that pumping time reduces to 33% in peak period and 42% in rush period of the improved scheme, which improves pump efficiency.