摘要
集中-分布混合式热电发电系统能够解决多个热电发电(Thermo Electric Generator,TEG)模块串联连接时各模块的最大功率点不匹配的问题,实现系统发电能效的最大化。本文提出一种应用于集中-分布混合式热电发电系统的分布式最大功率点跟踪(MPPT)控制方法,通过对各TEG模块的输出电流进行直接控制,集中单元的输入电流等于最大功率点电流最小的TEG模块的电流、分布式单元的输入电流等于各模块最大功率点电流与集中单元输入电流的差值,使得各TEG模块的MPPT控制相互解耦,系统能够快速、准确、稳定地跟踪各个TEG模块的最大功率点,实现了系统输出功率的最大化。搭建了由四个TEG模块组成的混合式热电发电实验系统,通过实验验证了提出的分布式MPPT控制方法的有效性。
A hybrid centralized-distributed TEG power generation system can overcome the maximum power points mismatching among different thermoelectric generator modules and maximize the energy efficiency of the whole system. This paper proposes a distributed MPPT control scheme for the hybrid centralized-distributed TEG power generation systems. Maximum power point tracking of all of the TEG modules is achieved fast,accurately and steadily by directly regulating the output current of each TEG module with coordinate control of the centralized and distributed units. With the proposed control strategy,the input current of the centralized unit is equal to the minimum maximum power point current of those TEG modules,and the maximum power point current difference is regulated by the distributed unit. Experimental results based on four-module TEG system are given to verify the feasibility and effectiveness of the proposed strategy.
出处
《电工电能新技术》
CSCD
北大核心
2015年第2期34-38,共5页
Advanced Technology of Electrical Engineering and Energy
基金
江苏省自然科学基金(BK20140812)资助项目
江苏省新能源发电与电能变换重点实验室开放研究基金(ZAB11002)
江苏省高校优秀科技创新团队项目
关键词
热电发电
最大功率跟踪
分布式发电
thermoelectric generator
maximum power point tracking
distributed power generation