In view of problems of large installed capacity, high power consumption and characteristics of stage in freezing construction method, a frequency-conversion energy-saving system based on PLC was designed based on analyzing mechanical properties of screw brine units of freezing system under different working conditions and power consumption in various frozen phases. The system takes PLC as control core, makes information feedback of system condition by use of pressure sensor and liquid level gauge , and uses PID algorithm to control frequency output of frequency converter so as to regulate flow of salt water pump and control amount of cooling. The feasibility and high efficiency of application of the system in shaft construction was proved by experimental data.%针对冻结施工法装机容量大、电能消耗高以及施工过程的阶段性特点,在分析了冻结系统螺杆盐水机组不同工况下的机械特性和在各个冻结阶段电能消耗情况下,设计了一种基于PLC的变频节能系统.该系统以PLC为控制核心,通过压力传感器、液位计等对系统工况信息进行反馈,利用PID算法控制变频器的输出频率,从而达到了调节盐水泵流量、控制供冷量的目的.实验数据论证了该系统在井筒施工中应用的可行性与高效性.
展开▼
