一种小型海流能独立发电系统的自供电直流变换器  

A self-powered DC/DC converter for small-scale stand alone marine current power generation system

作　　者：杨林 王海峰[1] 赵威[1] YANG Lin;WANG Hai-feng;ZHAO Wei(Institute of Electrical Engineering,Chinese Academy of Sciences,Beijing 100190,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院电工研究所,北京100190 [2]中国科学院大学,北京100049

出　　处：《电工电能新技术》2018年第7期75-83,共9页Advanced Technology of Electrical Engineering and Energy

基　　金：国家自然科学基金委员会与英国工程与自然科学研究理事会合作研究项目(51761135014)

摘　　要：本文针对小功率海流能独立发电系统所处海域及其供电负载的特殊性,同时考虑发电系统自启动、低流速运行、间歇性发电和发电机输出电压低等问题,提出一种基于传统Boost电路和Buck-Boost电路复合结构的自供电直流变换器,并进行了能量收集电路系统设计。在对自供电直流变换器和发电系统进行分析的基础上,系统采用一种变步长爬山搜索的最大功率点跟踪控制方法;为延长电池的使用寿命,系统的总体控制策略根据电池荷电状态来调用相应的控制方法。最后搭建了一台额定输出功率为60W的实验样机,实验结果验证了理论分析的正确性,以及本文所提出的自供电直流变换器的可行性和有效性。In view of the small-scale marine current power generation system’s particularity of sea area environment and electricity load,this paper studies the low-power stand alone marine current power generation system with self-starting,low flow rate operation,intermittent power generation and low output voltage of generator.A self-powered DC/DC converter which is based on the traditional Boost circuit and Buck-Boost circuit is proposed.Moreover,a system of energy harvesting circuit is designed.By analyzing the proposed converter and power generation system,the MPPT control strategy adoptes a variable step size hill-climbing searching method.In order to extend the life of battery,the overall control strategy of power generation system is adjusted according to the state-of-charge of the battery.Finally,the feasibility and validity of the proposed converter and the theoretical analysis are verified by a 60W prototype.

关 键 词：小型海流能发电 能量收集 直流变换器 自供电 BOOST电路 Buck-Boost电路 

分 类 号：P743.1[天文地球—海洋科学]