重庆科技大学学报（自然科学版）2025，Vol.27Issue(4)：77-87,11.DOI:10.19406/j.issn.2097-4531.2025.04.009
光伏离网制氢系统电源设计与能量优化
Power Design and Energy Optimization of off-Grid Photovoltaic Hydrogen Production Systems
摘要
Abstract
Off-grid photovoltaic(PV)hydrogen system often lack grid support,and the photovoltaic output power suffers from significant randomness and large fluctuations,which can lead to issues such as excessive input current ripple in the electrolyzer,a significant decrease in hydrogen production efficiency,and unstable system operation.To address these challenges,we propose an improved off-grid PV-powered hydrogen system that features an adap-tive-threshold-based energy management strategy.First,the conventional two-stage hydrogen production structure is enhanced by integrating an energy storage unit,enabling complementary operation between the PV array and stor-age to smooth power fluctuations.Second,the hydrogen power supply is designed using an LLC resonant converter with an interleaved parallel architecture,achieving low-voltage,high-current,and low-ripple output.A hybrid con-trol method that combines power and voltage modes is also introduced for optimized hydrogen production.Finally,an energy management strategy based on adaptive thresholds is proposed,with the net output power of the storage unit constrained to zero,ensuring coordinated operation between PV generation and energy storage.Simulation results demonstrate that under varying solar irradiance conditions,the system can dynamically adjust its operating mode through the proposed energy management strategy.while effectively reducing overcharging and over-dischar-ging states of the energy storage unit,thereby maintaining stable operation of the electrolyzer.关键词
光伏制氢/光伏功率波动/LLC谐振变换器/自适应阈值/能量管理Key words
photovoltaic hydrogen production/photovoltaic power fluctuations/LLC resonant converter/adaptive threshold/energy management分类
能源科技引用本文复制引用
王瑞,高文根,朱广尧,苏尚志..光伏离网制氢系统电源设计与能量优化[J].重庆科技大学学报（自然科学版）,2025,27(4):77-87,11.基金项目
国家自然科学基金项目"大规模分布式可再生能源发电并网规划与协同控制研究"(U21A20146) （U21A20146）
