A decoupling control method for a micro gas turbine

Abstract

The invention provides a micro gas turbine decoupling control method according to the characteristic that a micro gas turbine cool-heat-electricity cogeneration system can be divided into two subsystems. The pairing mode of the input quantity and the output quantity is accurately judged through an efficacy relative gain matrix, and controller design is carried out on a controlled object though a singular value decomposition decoupling method. The simulation result of coordinated control of a unit plant indicates that based on the efficacy relative gain matrix and comparing the singular value decomposition decoupling control method with a traditional PID control method, the adjustment time can be shortened, coupling is weakened, the overshoot is reduced, and accordingly the system has good dynamic and static characteristics. Compared with general decoupling control methods, the coupling elimination effect is good, calculation is easy, and the method is easy to realize in projects.

Description

technical field [0001] The invention belongs to the field of distributed energy systems, and in particular relates to a decoupling control method for a micro gas turbine. Background technique [0002] Micro Gas Turbine Based Combined Cooling Heating and Power system (hereinafter referred to as MGT-CCHP system) is a representative form of distributed energy. The system is mainly composed of a micro gas turbine and an absorption refrigerator, which simultaneously produce electricity, cold water, and hot water. Among them, the micro gas turbine is used for power supply, and its exhaust gas enters the absorption refrigerator to produce cold water and hot water. [0003] The control research of MGT-CCHP system starts from three aspects: micro gas turbine, double-effect absorption chiller and integrated system, and studies the dynamic characteristics of micro gas turbine side, heating and cooling system side and the whole respectively. The control of gas turbines is relatively m...

AI Technical Summary

Problems solved by technology

[0004] The MGT-CCHP system is a complex three-input and three-output system. There are complex correlations between multiple variables. The traditional PID control method takes a long time to adjust the process, the overshoot is large, and the coupling between variables is serious. It is commonly used. The decoupling method of the method has a large amount of calculation, and at the same time, the structure is complex, and it is not easy to implement in engineering

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