大规模风/光互补制储氢系统协调控制策略研究

Study of Coordination Control Strategy of Large-scale Wind/PV Hybrid Hydrogen Energy System

针对现有大规模风/光互补制储氢系统中多源协调控制策略的不足,以直流母线电压信号(DBS)控制策略为基本思想,结合电解槽特性,提出了主动型大规模风/光互补制氢系统协调控制策略。综合考虑电解槽可控性和最大制氢量的目标,按照DBS控制策略要求划分风/光/储/氢的优先级,并据此确定对应工作电压阈值以实现系统级协调控制,并分析了孤岛运行模式和并网运行模式下各设备的工作状态。同时为了表征电解槽负载特性,引入了功率/电压反下垂控制,在保证电解槽良好动态性的同时主动参与系统协调控制。最后在Matlab/Simulink中构建风/光互补制储氢系统仿真模型。仿真结果表明所提控制策略是正确、可行的。

Aiming at the deficiency of multi-source coordinated control strategy in large-scale wind/PV hybrid hydrogen system,an active coordinated control strategy is proposed based on the DC bus signaling(DBS)control strategy.Considering the controllability of hydrogen production equipment and the main purpose of the largest amount of hydrogen production,the priority of wind/PV/storage/hydrogen is divided according to the requirements of DBS control strategy,the working state of each equipment under the island and the grid connected operation mode is analyzed.In order to characterize the characteristics of the electrolyzer,the power voltage reverse droop control is introduced into the hydrogen production control to highlight the controllability of the electrolyzer,and it can actively participate in the coordinated control of the system with good dynamic performance.Finally,the simulation model of wind/PV hybrid hydrogen system constructed in Matlab/Simulink is verified.The simulation results show that the proposed control strategy is correct and feasible.