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Thermal load control method for combined heat and power supply system of micro gas turbine based on robust fuzzy prediction control

A micro gas turbine, fuzzy prediction technology, applied in general control systems, control/regulation systems, adaptive control, etc., can solve problems such as inability to meet performance requirements

Active Publication Date: 2019-11-22
SOUTHEAST UNIV
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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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  • Thermal load control method for combined heat and power supply system of micro gas turbine based on robust fuzzy prediction control
  • Thermal load control method for combined heat and power supply system of micro gas turbine based on robust fuzzy prediction control
  • Thermal load control method for combined heat and power supply system of micro gas turbine based on robust fuzzy prediction control

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Embodiment Construction

[0064] The technical solution of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0065] The method of the invention first approaches the dynamic characteristics of the process by establishing the T-S fuzzy affine model of the heat load control process, then promotes the design of the predictive controller through the state space transformation, and then eliminates the control deviation through the state amplification to improve the degree of freedom of the controller , and then because the state is unmeasurable, a fuzzy observer is established based on the fuzzy Lyapunov function to estimate the unmeasurable state, and finally a robust fuzzy predictive controller is established based on the augmented fuzzy model and the derivation of the fuzzy observer.

[0066] Such as figure 1 As shown, the present invention is based on a robust fuzzy predictive control micro-turbine heat and power cogeneration s...

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Abstract

The invention discloses a thermal load control method for a combined heat and power supply system of a micro gas turbine based on robust fuzzy prediction control, which comprises the steps of acquiring input fuel quantity and hot water temperature data of the combined heat and power supply system of the micro gas turbine, and establishing a T-S fuzzy affine model of the thermal load control process; establishing a global amplification state T-S fuzzy model of the thermal load control process; establishing an off-line fuzzy observer based on the global amplification state T-S fuzzy model; and establishing a robust fuzzy prediction controller based on the global amplification state T-S fuzzy model and the off-line fuzzy observer. According to the method, the influence of system nonlinearityon the controller is weakened by using the T-S fuzzy model, the problem that the state cannot be measured is solved by using the observer, steady-state errors are overcome by using state amplification, the degree of freedom of the controller is enhanced, and the method is a high-quality stable model prediction control method suitable for an actual complex industrial process.

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 complex characteristic...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B13/04
CPCG05B13/042
Inventor 潘蕾陈琛沈炯张俊礼
Owner SOUTHEAST UNIV
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