基于PLC的煤矿空压机变频调速系统优化设计

System Optimization of Frequency Control Design for Coal Mine Air Compressor Based on PLC

针对煤矿空压机组运行存在耗电量大、运行效率与可靠性低、机电设备维护和管理难度大等问题,利用S7系列PLC设计空压机变频调速控制系统。系统采用上、下位机监控框架,分别开发支持空压机组优化的软、硬件系统。以风包压力为实际控制对象,上位机S7-300利用模糊算法确认各空压机组的功率输出,在线整定PID参数,下位机S7-200对空压机组进行变频调速,适应井下风动负荷的动态变化。该系统实现了对空压机组运行状态的在线监控,系统运行平稳可靠,提高了空压机组的自动化控制水平。

For the operation of coal mine air compressor unit, there are problems such as large power consumption,low operating efficiency and reliability,and difficulty in maintenance and management of electromechanical equipment. The S7 PLC was used to design the air compressor frequency control system. The system adopts the upper and lower position machine monitoring frameworks to develop software and hardware systems that support the optimization of air compressor units. Taking the windpackage pressure as the actual control object,the upper computer S7-300 has used fuzzy algorithm to confirm the power output of each air compressor unit,and adjusted the PID parameters online, and the lower-level machine S7-200 has performed frequency control for air compressor units to adapt to dynamic change of underground wind load. The system has realized on-line monitoring of the operating status of air compressor unit,and the system has run smoothly and reliably, and improved the automatic control level of the air compressor unit.