基于多端口直流变压器的氢燃料电池-储能协调控制策略  

Coordinated Control Strategy of Hydrogen Fuel Cell-Energy Storage Based on Multi-Port DC Transformer

作　　者：翁幸 王继慷 王一[1] 刘树[1] 梅红明[1] 章雷其 WENG Xing;WANG Jikang;WANG Yi;LIU Shu;MEI Hongming;ZHANG Leiqi(Beijing Sifang Jibao Engineering Technology Co.,Ltd.,Beijing 100085,China;Electric Power Research Institute of State Grid Zhejiang Electric Power Co.,Ltd.,Hangzhou 310014,China)

机构地区：[1]北京四方继保工程技术有限公司,北京100085 [2]国网浙江省电力有限公司电力科学研究院,杭州310014

出　　处：《南方电网技术》2024年第6期98-111,共14页Southern Power System Technology

基　　金：国家重点研发计划资助项目(2020YFB1506800);国家电网有限公司科技项目(52110421005H)。

摘　　要：面向氢燃料电池在微网领域日趋广泛的应用,依托宁波慈溪氢电耦合直流微网示范工程中的风/光/氢燃料电池直流互联系统,研究其氢燃料电池接入的核心设备——三端口直流变压器的端口功率协调控制策略。为缩短仿真时间,提出并采用了一种适用于多模块串并联多有源桥结构直流变压器的开关周期平均模型,并应用该等效简化模型提出了一种燃料电池-储能混合供电系统能量协调控制策略。该控制策略可根据储能系统荷电状态、各端口功率容量、燃料电池动态响应速度等因素对各端口功率指令进行优化调整与智能分配,避免燃料电池发电功率过快变化、储能系统过充过放,并最大化氢能发电占比。经实际样机测试与MATLABSimulink仿真验证,该协调控制策略在直流变压器的多种控制模式下均有良好的工作性能,功率控制端口的实际功率可以跟随快速变化的指令值,负荷突变时电压控制端口的实际电压波动均能控制在4%以下。Aiming at the increasingly widespread application of hydrogen fuel cells in microgrid,this paper relies on the wind/photovoltaic/hydrogen fuel cell DC interconnection system in the hydrogen-power coupled DC microgrid demonstration project in Cixi,Ningbo,to study the port power coordinated control strategy of the three-port DC transformer,which is the core equipment for hydrogen fuel cell access.To shorten the simulation time,a switching period averaging model applicable to a multi-modular seriesparallel multi-active bridge structure DC transformer is proposed and adopted in this paper.Moreover,an energy coordination control strategy of the fuel cell-energy storage hybrid supplying system is proposed by applying this equivalent simplified model.The control strategy can optimally adjust the power instructions of each port according to the state of charge(SOC)of energy storage,the power capacity of each port,and the dynamic response speed of the fuel cell.Thus,it can prevent the fuel cell power generation power change too quickly,avoid the overcharges and over-discharges of energy storage,and maximizes the proportion of hydrogen power generation.The simulation results using MATLAB Simulink and experiment waveforms verify that the coordinated control strategy works well in various control modes of the DC transformer.The actual power of the port with power control mode can follow the rapidly changing instruction value,and the actual voltage fluctuation of the port with voltage control mode can be controlled below 4%when the load changes suddenly.

关 键 词：氢燃料电池 直流变压器 输入串联输出并联的多有源桥 简化模型 燃储协调控制 

分 类 号：TM46[电气工程—电器]