Energy efficient low-voltage DC-grids for commercial buildings

2015 IEEE First International Conference on DC Microgrids (ICDCM) Pub Date : 2015-06-07 DOI:10.1109/ICDCM.2015.7152030

R. Weiss, L. Ott, U. Boeke

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引用次数: 93

Abstract

The European ENIAC R&D project consortium DC Components and Grid (DCC+G) is developing suitable, highly efficient components and sub systems for 380 VDC grid to show the benefits of DC grid concept on test site in an office environment. The newly developed DC grid components and their integration into a generic system are presented in this paper. The targeted overall efficiency saving compared to AC grid is 5% and the energy conversion from PV (photo voltaic) is calculated to be 7% more cost effective compared to traditional PV installations. This paper also shows the realized DC grid prototypesupplying an office building of the Fraunhofer Institute in Erlangen, Germany, and describes general benefits of a DC grid system. The DC grid prototype consists of a DC lighting system, a DC low power supply for IT infrastructure, DC electric vehicle charger, a DC μCHP unit, DC photovoltaic MPPT units, a central rectifier and grid controller unit as well as a mixed AC/DC power monitoring unit. It is shown that less conversion losses and higher distribution efficiency can be achieved with a 380 VDC grid compared to conventional AC grids.

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商业建筑用节能低压直流电网

欧洲ENIAC研发项目联盟DC组件和电网(DCC+G)正在开发适用于380 VDC电网的高效组件和子系统，以在办公环境的测试现场展示直流电网概念的优势。本文介绍了新开发的直流电网组件及其集成系统。与交流电网相比，目标整体效率节省5%，与传统光伏装置相比，PV(光伏)的能量转换计算出的成本效益高出7%。本文还展示了为德国埃尔兰根的弗劳恩霍夫研究所办公楼供电的直流电网原型，并描述了直流电网系统的一般优点。直流电网原型由直流照明系统、用于IT基础设施的直流低功率电源、直流电动汽车充电器、直流μCHP单元、直流光伏MPPT单元、中央整流器和电网控制器单元以及交直流混合电源监控单元组成。结果表明，与传统的交流电网相比，380直流电网可以实现更小的转换损耗和更高的配电效率。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2015 IEEE First International Conference on DC Microgrids (ICDCM)

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