| Currently,an energy consumes the coal to have 70%in our country structure,this kind of energy structure makes energy utilization low on the hand.It will bring pollution to environment on the other hand,but the managing environment needs to pay a high price. The electric power is a kind of two energies for sweeping,delivering convenience, large-scale concentration produce.In recent years it develops more and quickly.Its development is advantageous to easing increasingly heavy environmental protection pressure,also advantageous to our country energy structure of excellent turn adjustment. Moreover,when the store hot type electric stove circulates,it can also avert from charged barbed wire net to use electricity high peak,to the apices valley of charged barbed wire net regulate a function effectively,be advantageous to charged barbed wire net of safety and economy circulate.This introduces characteristics and development of programmable controller first,. Analyzing a store hot electric stove the production principle and characteristics.Mainly introducing the control system of electric stove.The control system takes programmable controller as core and makes the change a rate of inverter machine,calculator and intelligence to control a technique to combine together.It complete the hot water stove of input water,output water,and electricity heat device the automatic control,make stove of input water current quantity,output water current quantity,the water temperature,water level keep in the best appearance.Carry out hot water boiler system a safety,credibility, stabilize to circulate and attain economy energy to decline to consume of purpose.In this design,the network structure of electric stove controls system is a top and bottom two layers of network.The communication speed of the upper level adoption can reach to the 100 M industrial Ethernet.It uses for the communication supervises and controls calculator and each of station with main PLC.The communication speed of the first floor adoption can reach to the PROFIBUS the spot total line with 12 M.It uses for a conjunction to the inverter machine,man-machine interface,intelligence gauge and weaving a distance machine.The whole control system includes supervision class and the spot class,supervise and control class to make the PC as place of honor machine,pass an Ethernet net connect with each other.The place of honor machine makes use of Siemens WinCC software to write the application procedure of the experiment supervision.The PLC chooses to use the programmable controller of the Siemens S7-300,the control procedure is made use of STEP7 software by the place of honor machine to write.This text also gave PLC structure diagram and main back track hardware diagram in the meantime.The system control of store hot type include the temperature inside the boiler,water level supply water system pressure,discharge control etc..In the process control of actual system,these controls have big and inertial,pure lag after etc.characteristics,the calculate way of singleness and traditional PID control can hardly carry out the accurate control of system.This system makes use of misty control technique,establishment mathematics model carries on a control,and pass actual spot applied,make it attain a product to turn.Moreover it gives the work principle of PID control and misty control. |
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