Abstract The system heat thermal oil to 300℃ through electric heater, then oil transfer heater to the waste water, waste water is cracked under high temperature and high pressure. The electric heating system consists of regulator, actuator and the controlled object. And the regulator is S7-200 PLC of Siemens. Two groups of SCR make up of the actuator. The controlled object consists of ten fixed heating groups and two adjustable heating groups. Temperature control mode is PID regulation. By modeling the electric heating system and analyzing the PID adjustment and control program, find problems existing in the system and put forward suggestions.
Geng Dongyong,Zhao Guijuan. Based on the Fault Information of Different Ground Fault Identification and Analysis[J]. Electrical Engineering, 2014, 15(10): 89-92.
2014, Vol. 15 
