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宜君输油站进行一台变频器驱动二台电机的电气改造以后,如何从站控计算机实现自动控制保证管道密闭输油成为新的课题,笔者从改造前的节流控制入手,结合变频器接口电路,重新设计控制逻辑,重新修改站控PLC控制程序,计算机通过自动调节转速跟踪压力值达到进站压力闭环调节,操作员可实时监控泵的运行状态和工作模式。
Yijun gas station for a inverter drive motor after the electrical transformation of two, how to achieve automatic control from the station control computer to ensure that airtight pipeline oil has become a new topic, the author start with the throttling control before the transformation, combined with the inverter Interface circuit, re-design control logic, re-modify the station-controlled PLC control program, the computer automatically adjusts the speed to track the pressure value to achieve pitching pressure closed-loop adjustment, the operator can monitor the pump running status and working mode in real time.