PEM electrolysis system has characteristic of excellent performance such as fast
response, high electrolysis efficiency, compact design and wide adjustable power
range. It provides a sustainable solution for the production of hydrogen, and is
well suited to couple with renewable energy sources. In the development process
of PEM electrolysis controller, this article originally applied the V-mode
development process, including simulation modeling, RCP testing, and HIL
testing, which can provide guidance in the practical application of electrolytic
hydrogen production. In this paper, we present modeling and simulation study of
PEM water electrolysis system. Model of electrolytic cell, hydrogen production
subsystem and thermal management subsystem are constructed in Matlab/Simulink.
Controller model was designed based on PI control strategy. A rapid prototyping
controller with MPC5744 chip was used to develop the control system of
electrolytic hydrogen production system. Hardware in the loop test system is
designed with PXI hardware and NI VeriStand software. The simulation results
indicate that the working current density is 1.0 Acm-2, at 25°C and 55°C, the
electrolytic voltage of PEM electrolytic cell is 2.0093V and 2.06218V,
respectively, and the electrolytic efficiency is 74.25% and 72.35% relative to
the thermal neutral voltage of 1.492V. Performance simulation of electrolytic
hydrogen production system and hardware in the loop testing of the controller
were completed on this development platform. Practical applications have shown
that this model based development platform can greatly improve development
efficiency. It is applied to the development process of PEM electrolysis
controllers to accelerate development speed and efficiency, and has certain
engineering significance.