Development of Molten Salt Electric Heating Control System Based on Monitor and Control Generated System and Programmable Logic Controller

Chunxu DU; Yancheng MA; Yanquan WANG; Jihao XIE; Jinkai LIU; Yuanwei LU

doi:10.12096/j.2096-4528.pgt.21004

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Development of Molten Salt Electric Heating Control System Based on Monitor and Control Generated System and Programmable Logic Controller

Solar Thermal Power Generation Technology | 更新时间：2025-07-04

- Development of Molten Salt Electric Heating Control System Based on Monitor and Control Generated System and Programmable Logic Controller
- Power Generation Technology Vol. 42, Issue 6, Pages: 727-733(2021)
- 作者机构：
  
  1.传热强化与过程节能教育部重点实验室(北京工业大学), 北京市朝阳区 100124
  2.传热与能源利用北京市重点实验室(北京工业大学), 北京市朝阳区 100124
- 作者简介：
- 基金信息：
  
  General Program of National Natural Science Foundation of China(52076006)
- DOI：10.12096/j.2096-4528.pgt.21004
  CLC： TK519
- Received：01 March 2021，
  
  Published：31 December 2021
- 稿件说明：
移动端阅览
Chunxu DU, Yancheng MA, Yanquan WANG, et al. Development of Molten Salt Electric Heating Control System Based on Monitor and Control Generated System and Programmable Logic Controller[J]. Power Generation Technology, 2021, 42(6): 727-733.
DOI：

Chunxu DU, Yancheng MA, Yanquan WANG, et al. Development of Molten Salt Electric Heating Control System Based on Monitor and Control Generated System and Programmable Logic Controller[J]. Power Generation Technology, 2021, 42(6): 727-733. DOI： 10.12096/j.2096-4528.pgt.21004.

摘要

熔盐作为传热蓄热工质，在可再生能源发电及谷电蓄热供热系统中具有重要应用。由于恒功率加热容易导致电加热器烧毁、熔盐分解等问题，因此熔盐的熔化、防凝都需要恒温电加热系统。利用监视与控制通用系统（monitor and control generated system，MCGS）组态软件和西门子S7-200PLC，将固态继电器、热电阻和电加热器结合，设计了一套电加热器闭环温度PI控制系统。按不同PI整定方法进行实验对比，并加入抗积分饱和与两自由度控制，解决了PI控制器超调与抗干扰矛盾的问题。在超调量大幅减小的同时，实现在干扰条件下熔盐储热系统温度的快速调节且相对稳定的抗干扰功能。

Abstract

Molten salt has important applications in renewable energy power generation and energy storage heating system as the heat transfer and storage working fluid. As the constant power heating can easily lead to the burning of electric heater and the decomposition of molten salt

a constant temperature electric heating system is needed for melting and anti-freezing of molten salt system. We used monitor and control generated system (MCGS) configuration software and SIEMENS S7-200PLC

combined with solid-state relay (SSR)

thermal resistance and electric heater

to design a closed-loop electric heater temperature PI control system. According to different PI tuning methods for experimental comparison

the contradiction problems of the PI controller over-tuning and anti-interference were solved by adding anti-integral saturation and two-degrees-of-freedom control. While the over-tuning was greatly reduced

the anti-interference function of the temperature of molten salt heat storage system under the interference condition was realized

and the temperature control of molten salt heat storage electric heater was carried out.

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references

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