Micro gas turbine combined cooling and power control system and method based on generalized predictive control

Abstract

The invention discloses a micro gas turbine combined cooling and power control system and method based on generalized predictive control. A prediction error calculation module based on an ARX model performs prediction error calculation according to the fuel amount and the rotational speed, and then a generalized predictive control module is switched on; a second module calculates the optimal fuelamount according to the deviation between the set value of the rotational speed and the actual rotational speed and the input of a third module; a prediction error calculation module based on a Hammerstein model performs the prediction error calculation according to the fuel amount, a valve opening degree of a smoke by-pass valve and the cold water temperature, and then a nonlinear generalized predictive decoupling control module based on the Hammerstein model is switched on; and a fourth module calculates the optimal valve opening degree of the smoke by-pass valve according to the deviation between the set value of the cold water temperature and the actual value, the control sequence of the fuel amount calculated by the second module and the input of a fifth module. The micro gas turbinecombined cooling and power control system and method based on the generalized predictive control effectively overcome the complex characteristics of a system and improve the flexibility and security of the system.

Description

technical field [0001] The invention relates to the field of thermal automatic control, in particular to a micro gas turbine combined cooling and power supply control system and control method based on generalized predictive control. Background technique [0002] As economies continue to develop, many countries face serious challenges in mitigating climate change and reducing energy supplies. A central solution to reducing greenhouse gas emissions and increasing energy efficiency is the use of distributed energy systems. Distributed energy systems are usually composed of a variety of modular and small-scale technologies, located close to end users, and can be considered as an important complement to traditional centralized grids. They offer many advantages such as low transmission losses, low emissions, and flexibility with multiple energy sources, including fossil fuels and renewables. [0003] As a key form of distributed energy systems, micro gas turbines combined with ...

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Problems solved by technology

However, due to the complex dynamic characteristics of the MGT-CCP ​​system, such as nonlinearity, multi-variable strong coupling, unknown disturbance, etc., the PID method based on single-input and single-output loop separation is no longer suitable for meeting performance requirements, even if the PID parameters are obtained good tuning

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