Research And Design Of Energy Storage Induction Heating Control System

At present,most areas in north China still choose the form of burning coal for heating,but there are many problems in this way: burning coal will produce a lot of toxic gas,pollution to the environment,affecting people’s life;Coal is also non-renewable energy,the use of clean energy has become a top priority.At the same time,there is the problem of wind power abandonment in northern China,which has an impact on people’s life.At present,the electric heating conversion efficiency of energy exchanger in electric regenerative heating control system is low and the control effect of the control system is not good.To solve these problems,this paper proposes the wind power direct absorption energy storage technology that uses surplus wind power for heating system.In the period when wind power does not meet the cut in,according to the optimal control strategy of step electricity price,the power grid is directly used for energy storage and heating.It provides a new idea for heating control system.This design first introduces the relevant electromagnetic induction heating principle and induction heating power supply circuit design,select series resonance and three-phase bridge type non-control rectifier circuit,power regulation mode by triggering the slave station S7-1200 PWM function block pulse width interface to achieve output power regulation.The whole device is designed to realize the induction heating control process of the energy storage tank through four systems: wind power and electricity switch control system,energy storage tank heating system,constant liquid level water refill system and heating system.In the cyclic heating process of the energy storage tank,a compound control strategy is adopted,which is the fuzzy controller of the front stage attached with given temperature and the fuzzy PID controller of the rear stage induction heating,so that the given temperature of the closed-loop heating system can be adjusted with the change of outdoor temperature.At the same time,in order to save energy and reduce consumption,the heating circulation flow coordination control strategy adopts the closed-loop ratio servo control system with the output of the rear fuzzy PID controller.The software part is completed by Matlab.The control strategy,actual process and fuzzy PID control of the heating system of the energy storage tank are combined to create a simulation block diagram in the built-in Simulink of Matlab software,and PID control is selected as a comparison model for simulation experiments.The results show that fuzzy PID control has better effect,faster adjustment speed and less overshoot.The hardware part adopts S7-1500 PLC as the control network center,S7-1200 PLC as the slave station,ET200 M distributed I/O slave station and frequency converter G120.The heating system of energy storage tank is realized by S7-1200 PLC from the station,and the signal of constant liquid level water refill system and heating system is collected from the station by ET200 M distributed I/O.In addition,the Win CC upper computer screen including user management system and main process monitoring screen is designed to carry out real-time monitoring and control the start and stop of the field equipment,you can view the trend curve of equipment operation at any time,alarm system in order to prevent the occurrence of accidents.The networked implementation of intelligent control and its composite and coordination control strategy improves the real-time performance and reliability of system control,and greatly improves the performance of system control.