Modelling And Fault Tolerance Control Of Microturbine System

The Combined Heat and Power(CHP)system is an important part of distributed energy.The microturbine is the core component of the cogeneration system and it provides the power and the heat.The CHP system needs to operate stably for a long time without people monitor.Therefore,research on microturbine control systems is particularly important.To address the problem of sensor fault,in addition to adding hardware redundancy,the method of implementing fault-tolerant control by designing the control algorithm does not increase the hardware cost.This has become the mainstream direction of current research.This paper focuses on the development of the micro turbine fault tolearant control(FTC)algorithm and hardware-in-the-loop(HIL)platform verification.Firstly,the Model Based Design(MBD)method was used to develop the T100 microturbine component level model in the Matlab/Simulink environment.The structure of the micro turbine is analyzed to determine the rotor dynamic inertia of the regenerative microturbine and the thermal inertia of the regenerator.Considering the thermodynamic modeling and component balance equation of the system,the thermodynamics of the main components of the microturbine are determined.And the dynamics principle,the component level model of the microturbine is established;and the model is modified to improve the accuracy of the model at non-design points.The model simulates has high precision.Next,the controller design and FTC research were carried out.A Piecewise Linear Model(PLM)for performance degradation of micro turbines under 70%-100% load conditions is designed.The theseis developed a constant exhaust temperature controller for the need of CHP system;and proposes a bankof-Kalman-filter based fault diagnosis method to address the problem of sensor fault diagnosis of microturbine,and model-based-fault-tolerance-control method is studied.Then,the code generation method is used to the integrated T100 micro turbine model into the FWorks platform.First introduce the main functions and architecture of the platform,then introduce how to use the code generation method to generate Simulink model as C++ code.At the same time,the consistency of code generation is verified.Finally,the digital simulation model and control algorithm are prototyped and verified by the hardware-in-the-loop simulation platform.This paper introduces the basic architecture and main functions of the HIL platform,analyzes the interface requirements from digital simulation to hardware-in-the-loop simulation,and integrates the requirements of FTC algorithms in industrial controllers,and finally implements HIL simulation of FTC.And compared the results with digital simulation.