Design And Application Of Supervisory Control System Of Marine Power Station Based On PLC And Serial Communication

With the rapidly development of shipping industy, the large scale and the high tech of Ships' are day by day remarkable. There come forth many new ideas, the new technology, the new equipment in the marine power plant and the electrical power system. The control, the surveillance and the management of power equipment's plays an important role in the marine power plant. In order to realize the reliability for the movement, control and management of the marine power plant, and enhance the automation degree of unmanned engine room, the thesis has designed a marine power automation system base on PLC and Serial communication , which can increase the reliability and economic effect, using advanced industrial control technology, computer technology.The monitoring system is composed of one operating station computers and one control computer. The control computer, which is cored by Siemens S7-300 PLC and two PPU, The S7-300 PLC controls the two PPU respectively, the PPU control a generator independently. In order to transmit monitoring data of PPU to PC, the system develop a Switch device. Via this equipment, we can carry out Serial communication with PPU and PC. The masters communicate with the slave by the way of Ethernet network and serial communication. This may also cause the marine power plant very good to hang on the entire ship network system, to realize the unmanned engine room automation to provide the foundation.I designed the program of PLC with using the programme software of the company of Siemens, to realize the supervisory control and data acquisition. On the basis of generator parameter, Using PC utility software, realizes to the PPU operational parameter establishment. We premuse upon very good function in marine power plant. Using the configuration software Fameview, this paper has designed the monitoring software of PC, and the human machine interface has also been designed combined with the control function and operation habit of automation power station. The friendly and visualized human machine interface can make the operator know the running state of the whole power station monitoring system, and then gives the control command according to the different local circumstance.The supervisory system of the marine power plant which based on PLC and the serial communication has been debugged in the factory. All function is ok, which has achieved our anticipated effect basically, soonly installed and applied.