Study On Hardware-in-the-loop Simulation Of Distributed Energy System And Scaling Method

Energy is the basis for the development of human society. With the socio-economicdevelopment，there is growing demand for energy. Energy and environmental issues hasgradually become an important factor restricting the sustainable development of economyof our country. In order to realize the sustainable development of energy, people pay moreand more attention to the distributed energy system that have many advantages such asenergy saving, environmental protection,economy and it can make full use of therenewable energy.Distributed energy system has a complex nonlinear relationship with othersubsystems which makes it have the characteristics of intermittent, systematicness anduncertainty. To do a mere mathematical simulation on the system will have the problemthat some subsystem model is not accurate or hard to establish. Meanwhile, it will requirehigh research cost and need long development cycle if do the research with pure physicalmodel. Hardware-in-the-loop simulation (HILS) technology is the highest confidence levelof simulation method. HILS is a kind of very effective method to study the distributedenergy system. It can solve the difficulty of the model is not precise or hard to build modelin pure mathematics simulation, and it don’t have to purchase all hardware of the system.Research of system performance under different structure configuration is often needed inHILS. Using scaling method to process the input/output signal of the fixed can reflect theinput/output signal of actual research object. Using scaling method can also save researchcosts and shorten the development cycle.In this thesis, wind/solar/fuel cell hybrid power generation of distributed energysystems is used as objects, the model of fuel cell system, water electrolysis hydrogenproduction system, hydrogen storage system and so on was established. The distributedenergy system use the excess power generated by solar energy and windenergy to produceand storage hydrogen, and it use the storaged hydrogen as fuel to supply energy by fuelcells when the solar and wind power is not enough. Because of this above, distributedenergy systems can make full use of energy and improve the energy efficiency. In theresearch, a fuel cell subsystem is processed by scaling method, the simulation results thetwo fuel cell subsystem are the same. In the wind/solar/fuel cell hybrid power generationsystem, scaled fuel cell subsystem was used to compare with the system we want toresearch. The result shows that the performance of electrolyzer and hydrogen storage subsystem are the same, it means we can use a small scale fuel cell subsystem to study alarge scale system by scaling method. This laid an important foundation for theimplementation of HILS of wind/solar/fuel cell hybrid power generation system infuture.