Research On Integrated Optical Storage Electrolysis Power Supply

Based on the traditional electrolysis power supply,this thesis carries out related research and studies a new type of high-efficiency electrolysis power supply system suitable for lowvoltage distribution network.The system organically combines electrolytic power supply and PWM rectification technology to effectively improve the power quality on the distribution network side,avoids energy waste and reduces enterprise costs.In addition,the system also uses distributed power sources composed of photovoltaic components and batteries to convert the DC power stored in the battery and the DC power generated by the photovoltaic components into low-voltage DC power and directly send it to the DC bus to provide the stability required for normal production.The low-voltage,high-current direct current of the company has realized a new type of high-efficiency electrolytic power supply system with the functions of "peak cut" and "photovoltaic power generation",which greatly reduces the electricity cost of the enterprise.This article mainly conducts research from the following aspects:First of all,the thesis briefly describes the development of electrolytic power supply,gives the structural topology of traditional electrolytic power supply,analyzes the development status of electrolytic power supply,energy storage system and key technology related to photovoltaic power generation,summarizes the problems existing in traditional electrolytic power supply,and combined with the current energy development trend,a new type of device is proposed,that is,namely integrated optical storage electrolysis power supply.The topology of the system is that the front stage adopts voltage-type PWM rectifier circuit,the latter stage adopts full-bridge DC/DC circuit,and the distributed power supply photovoltaic module adopts Boost circuit and energy storage module adopt bidirectional DC/DC converter.In addition,according to the topological structure of the integrated optical storage electrolytic power supply,the working principle of each module of the system is analyzed in detail and a mathematical model is established.Secondly,the control method of the integrated electrolytic power supply with optical storage is proposed.Specifically,the control method based on the Clarke transformation and power feed-forward voltage outer loop and current deadbeat inner loop is adopted for the front-stage voltage-type PWM rectifier circuit;the dual-loop control strategy of voltage outer loop and current inner loop is adopted for the rear-stage full-bridge DC/DC circuit;the conductance increment method MPPT control strategy is adopted for the boost chopper circuit of the photovoltaic module;the control strategy of constant voltage charging and constant current discharging is adopted for the bidirectional DC/DC converter of the energy storage module.Besides,the parameters of the above control strategy are designed and the stability is analyzed.In addition,the different working conditions of the system are analyzed,and the coordinated control strategy of the system is proposed.In the end,the correctness of the system control method is verified by PSIM simulation software simulation.Finally,a 5k W test prototype is developed.The main circuit of the device is designed in detail,the control system hardware with TMS320F2812 as the core,and the control system software program is designed in detail.Through simulation experiments,it is verified that the integrated optical storage electrolytic power supply proposed in this paper has the advantages of high power quality on the side of the grid,saving electricity cost for enterprises,and effectively utilizing photovoltaic energy.The content studied in this article provides a reference basis for equipment transformation in the electrolysis industry.