A thermal load control method for micro gas turbine cogeneration system based on robust fuzzy predictive control

Abstract

The invention discloses a heat load control method of a micro gas turbine combined heat and power system based on robust fuzzy predictive control, comprising the following steps: collecting input fuel quantity and hot water temperature data of the micro gas turbine combined heat and power system, and establishing a heat load control process The T‑S fuzzy affine model of the heat load control process is established; the global amplification state T‑S fuzzy model is established; the offline fuzzy observer is established based on the global amplification state T‑S fuzzy model; the global amplification state T‑S fuzzy model is established Model and Offline Fuzzy Observer to Build a Robust Fuzzy Predictive Controller. The method of the present invention utilizes the T-S fuzzy model to weaken the influence of the nonlinearity of the system on the controller, adopts the observer to overcome the problem of unmeasurable state, uses the state amplification to overcome the steady-state error, and strengthens the degree of freedom of the controller. A high-quality stable model predictive control method for practical complex industrial processes.

Description

technical field [0001] The invention relates to an automatic control method, in particular to a method for controlling heat load of a micro gas turbine combined heat and power system based on robust fuzzy predictive control. Background technique [0002] The massive consumption of fossil fuels, global warming and environmental degradation have attracted many researchers to find more efficient ways to save energy and reduce greenhouse gas emissions as well as pollutants. Micro gas turbine combined heat and power system is a thriving new technology for efficient and clean energy production. Its overall energy efficiency can exceed 90% due to the cascading utilization of energy, while the thermal efficiency of centralized power plants is between 18% and 47%. Therefore, in recent years, the micro gas turbine combined heat and power system has received extensive attention and has become one of the main directions of energy development. However, due to the dynamics of micro gas ...

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Problems solved by technology

However, because the dynamics of micro gas turbine cogeneration systems have complex characteristics such as large thermal inertia, strong multivariable coupling, input constraints, nonlinearity, and unknown disturbances, the PID method has been unable to meet the performance requirements.

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