基于最大功率点跟踪与储能补偿的光伏-制氢系统研究  

Photovoltaic hydrogen production system based on MPPT and energy storage compensation

作　　者：徐桂芝 梁丹曦 宋洁 康伟 赵雪莹 郜捷 XU Guizhi;LIANG Danxi;SONG Jie;KANG Wei;ZHAO Xueying;GAO Jie(Global Energy Interconnection Research Institute Co.,Ltd.,Beijing 102211,China)

机构地区：[1]全球能源互联网研究院有限公司,北京102211

出　　处：《热力发电》2022年第11期156-163,共8页Thermal Power Generation

基　　金：国家电网有限公司总部管理科技项目(4000-202058313A-0-0-00)。

摘　　要：利用太阳能发电制氢既是消纳高比例新能源的有效途径,也是实现“双碳”目标的重要支撑。建立了共用直流母线的光伏-制氢系统模型,通过对光伏系统进行最大功率点跟踪(maximum power point tracking,MPPT)控制,光伏电池的最大功率点可以与制氢电解槽的工作曲线动态匹配,实现光伏能量的最大化利用。为了解决非均匀照度时的全局最大功率点搜索问题,提出了基于Fibonacci搜索的MPPT控制方法。研究结果表明:基于Fibonacci搜索的MPPT方法可对均匀照度以及非均匀照度条件下的光伏系统进行MPPT控制,其中功率单峰曲线的跟踪准确度接近99%,功率多峰曲线的平均跟踪准确度接近98%;碱式电解槽工作在电压控制模式,通过与MPPT控制器和储能补偿装置的配合,当功率充足时可以使制氢效率保持在70%以上。Using power generated by photovoltaic to produce hydrogen is not only an effective way to absorb a high proportion of new energy,but also an important support to achieve the “dual carbon” target.A photovoltaic hydrogen production system model with common DC bus is established.By conducting maximum power point tracking(MPPT) control for photovoltaic system,the maximum power point of the photovoltaic cell can be dynamically matched with the working curve of alkaline electrolyzer,so as to realize the maximum utilization of photovoltaic energy.In order to solve the problem of global maximum power point search under non-uniform illuminance,an MPPT control method based on Fibonacci search is proposed.The results show that,the MPPT method based on Fibonacci search can be used for MPPT control of photovoltaic systems with uniform irradiance and non-uniform irradiance.The tracking accuracy of single-peak power curve is close to 99%,and the average tracking accuracy of multi-peak power curve is close to 98%.The alkaline electrolytic cell works in voltage control mode.With the cooperation of MPPT controller and storage compensation,the efficiency of hydrogen production can be kept at more than 70% when the power is sufficient.

关 键 词：光伏发电 制氢 最大功率点跟踪 FIBONACCI搜索 碱式电解槽 

分 类 号：TK91[动力工程及工程热物理]