Design of a low voltage DC grid interfacing PV and energy storage systems

2017 IEEE Symposium on Computer Applications & Industrial Electronics (ISCAIE) Pub Date : 2017-04-01 DOI:10.1109/ISCAIE.2017.8074949

H. Elfeqy, A. Al-Rumaihi, M. Shahin, A. Massoud, A. Gastli

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引用次数: 4

Abstract

A design of a Photovoltaic (PV) power system architecture with energy storage system for low voltage DC grid applications is presented in this paper. The system components include the following: PV panels with non-isolated dc-dc interleaved boost converters, batteries with non-isolated bidirectional buck converters. The PV converter is controlled using perturb & observe for maximum power point tracking. The batteries' converter is controlled to regulate the DC bus voltage. These parts are linked together with the utility grid through a 600V DC bus. An energy management system is used to control the power flow between the system components. As an example for the low voltage DC grid system integration; a total number of 1,008 panels can be installed on the rooftop of a selected building, with a total power of 320kWp. Different scenarios are considered for the connections of both PV and batteries. A scaled-down experimental prototype, for the PV system with an energy storage system, is used to validate the presented concept.

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一种连接光伏与储能系统的低压直流电网设计

提出了一种具有储能系统的低压直流电网光伏发电系统结构设计方案。系统组件包括:带非隔离dc-dc交错升压转换器的光伏板，带非隔离双向降压转换器的电池。光伏变流器采用扰动观测控制，实现最大功率点跟踪。通过控制电池的变换器来调节直流母线电压。这些部件通过600V直流母线与公用电网连接在一起。能源管理系统用于控制系统组件之间的功率流。以低压直流电网系统集成为例;选定建筑物屋顶可安装1008块太阳能板，总功率为320kWp。光伏和电池的连接考虑了不同的场景。一个按比例缩小的实验原型，用于具有储能系统的光伏系统，用于验证所提出的概念。

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2017 IEEE Symposium on Computer Applications & Industrial Electronics (ISCAIE)

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