Research of cascade averaging control in hydraulic equilibrium regulation of heating pipe network

• Autores: Chunlei Liu, Peili Wang, Zhijun Yang, Lijiao Guo, Yi-Tian Gao, Chen Wang, Yong Sun
• Localización: Applied Mathematics and Nonlinear Sciences, ISSN-e 2444-8656, Vol. 7, Nº. 2, 2022, págs. 685-702
• Idioma: inglés
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• Resumen

  • The heating pipe network system with such dynamic characteristics as nonlinearity and large time lag may cause hydraulicdisorder. To solve this problem, this paper proposes a unit control-based hydraulic equilibrium control strategy, whichconstructs an equilibrium regulation system for heating pipe networks by optimising the inlet device of each unit and usinga novel control theory. By developing a cascade control system to control the return water temperature and the pressuredifference between supply and return water of the branches at each unit of the pipe network, we were able to stabilisethe pressure and control the temperature. Then, we used the averaging control theory to set the parameters of regulationsystems between each unit. The research results indicate that, compared to the traditional single-loop negative-feedbackreturn water temperature control system, the cascade averaging controller has a better control effect than the single-loopPID controller. This is because it has a smaller overshoot and can cope with system interference factors quickly. Therefore,the temperature of return water between each unit can be coordinated and fluctuation is within a smaller range. Thiseffectively eliminates the influence of static and dynamic hydraulic disorder on entire system stabilit