Shandong Province Tian'an Mining Industry Group Co., Ltd.

针对宏阳煤矿主井提升系统存在重载启动时对电网和机械冲击大、功率因数低、调速困难及电能浪费的问题,基于矢量控制理论,设计了一种适用于大功率防爆提升机变频电控装置。该变频电控装置通过采用双三电平变频器拓扑结构,结合软启动技术、优化热设计和功率无感母线技术,有效降低启动电流冲击和机械冲击,提高系统功率因数和调速精度。实际应用运行结果表明,该变频电控装置在提升速度自动控制、重载启动、能量节约等方面具有显著优势,提升机制动闸磨损量降低80%以上,功率因数达到0.98,电网谐波含量得到明显抑制,工作量不变的情况下总耗电量降低约15%,满足现代煤矿生产对于主井提升系统高效、稳定和安全的需求。

Aiming at the existing problems of large impact on the power grid and machinery, low power factor, difficult speed regulation, and electric energy waste during heavy load start-up of the main shaft hoisting system in Hongyang Coal Mine, a variable frequency electric control device suitable for high-power explosion-proof hoist is designed based on vector control theory. This variable frequency electric control device by adopting dual three-level frequency converter topology structure, combining with soft start-up technology, optimized thermal design, and power non inductive generatrix technology, effectively reducing starting current shock and mechanical shock, and improving system power factor and speed regulation accuracy. The actual application operation results show that this variable frequency electric control device has significant advantages in aspects such as speed automatic control, heavy load start-up, energy saving, etc. The wear amount of the hoist damper brake is reduced by more than 80%, the power factor reaches 0.98, the harmonic content of the power grid is significantly suppressed, and the total power consumption is reduced by about 15% without changing the workload. It meets the requirements of modern coal mine production for efficient, stable, and safe main shaft lifting systems.