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直流模块式建筑集成光伏系统的拓扑研究
引用本文:刘邦银,梁超辉,段善旭.直流模块式建筑集成光伏系统的拓扑研究[J].中国电机工程学报,2008,28(20):99-104.
作者姓名:刘邦银  梁超辉  段善旭
作者单位:华中科技大学电气与电子工程学院,湖北省,武汉市,430074
摘    要:在建筑集成光伏(building integrated photovoltaic,BIPV)系统中,光伏组件作为具有发电能力的表面建筑材料,通常有不同的安装方向和角度,且易受到周围建筑物等形成的局部阴影影响,而采用常规的集中式、串式和多串式技术的电气结构由于系统最大功率点跟踪(maximum power point tracking,MPPT)以光伏组件串或阵列为单位,难于获得高的能量变换效率,甚至可能形成热斑,导致光伏组件的不可逆损坏。为了解决上述问题,该文提出了一种直流模块式BIPV,该系统以将光伏组件、具有MPPT功能的高增益DC-DC变换器和表面建筑材料集成为一体的光伏直流建筑模块为核心,降低了系统成本,且每个光伏组件具有独立的MPPT,增强了系统抗阴影能力。论述了光伏直流建筑模块其拓扑设计的原则,比较分析了一族候选拓扑的性能,选择了一种适合的有源箝位型电流馈入的半桥变换拓扑做为光伏直流建筑模块中的集成DC-DC变换器,构建了直流模块式系统的实验原型,验证了系统的可行性。

关 键 词:建筑集成光伏系统  电气结构  光伏直流建筑模块  DC-DC变换器
收稿时间:2008-01-03

Research on Topology of DC-module-based Building Integrated Photovoltaic System
LIU Bang-yin,LIANG Chao-hui,DEAN Shan-xu.Research on Topology of DC-module-based Building Integrated Photovoltaic System[J].Proceedings of the CSEE,2008,28(20):99-104.
Authors:LIU Bang-yin  LIANG Chao-hui  DEAN Shan-xu
Abstract:The photovoltaic modules acting as facade elements with generating electricity function in the building integrated photovoltaic (BIPV) system generally have different installation orientations and angles, moreover these modules are easy to be affected by partial shadows created by the surrounding buildings and so on. However the conventional power configurations based on centralized, string and multi-string technology is difficulty to obtain high energy conversion efficiency, in severe cases, the hot-spot problem can arise and the photovoltaic modules can be irreversibly damaged due to their non-independent maximum power point tracking (MPPT) based on string or array. A DC-module-based BIPV system is proposed in this paper to solve these problems. The photovoltaic DC building modules as the core of the proposed system integrate photovoltaic module, high step-up DC-DC converter with MPPT function and facade elements, and decrease the system costs. Furthermore the individual MPPT of every photovoltaic module improves the anti-shadow performance. The design criterions of the topologies for the proposed system are discussed, and the performances of a family of candidate topologies are compared and analyzed. A suitable active clamped current-fed half bridge topology is selected to serve as photovoltaic dc building module integrated DC-DC converter, and a prototype of DC-module-based system is built to verify the feasibility of the proposed system.
Keywords:building integrated photovoltaic system  power configuration  photovoltaic DC building module  DC-DC converter
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