Control Strategy Of Hardware-in-the-loop Simulation Hybrid System Of High Temperature Fuel Cell And Micro Gas Turbine

Today,with the increasing shortage of fossil energy and the increasingly serious environmental problems,it is urgent to research and develop efficient and clean power generation technology.High temperature fuel cell is a kind of clean power generation technology that directly converts chemical energy into electric energy efficiently,and its high temperature exhaust gas has high utilization value.A hybrid power generation system comprising a high temperature fuel cell and a gas turbine can achieve higher power generation efficiency than a single high temperature fuel cell system.In the field of distributed generation,hybrid power system of high temperature fuel cell and gas turbine has received increasing attention.However,due to the strong coupling and strong nonlinearity of the system,the research of hybrid power generation system is full of challenges.This paper has done some studies on the control strategy of Solid Oxide Fuel Cell(SOFC)and Micro Gas Turbine(MGT)hybrid power system(one of the representatives of high temperature fuel cell and gas turbine hybrid power system).Based on Capstone's C30 micro gas turbine,we have found a suitable SOFC system that can match the C30 MGT in the previously designed SOFC system.We coupled them to design the SOFC-MGT hybrid power system.The dynamic simulation model of SOFC-MGT hybrid power system is constructed by APROS simulation platform.The hardware-in-the-loop simulation platform of SOFC-MGT hybrid power system is built by OPC communication technology,HollySys DCS control system,KingSCADA software and APROS simulation platform.It avoids shortcomings such as low precision and unclear dynamic characteristics brought by full numerical simulation.At the same time,high cost of all physical experiments is avoided.The detailed control strategy of the startup process and variable load operation of SOFC-MGT hybrid power system is designed.The parameters of the controllers are determined.The feasibility of the control strategy is verified by simulation test.The simulation model of SOFC-MGT hybrid power generation system established in this paper has high precision and convenient application.The hardware-in-loop simulation platform built by the OPC communication technology is topological,which lays a solid foundation for the research of dynamic characteristics and control strategies of the hybrid power system.The control strategy of start-up process and variable load operation process designed in this paper have very good control effect on the simulation model,and have guiding significance for the control of the SOFC-MGT hybrid power generation physical system.