具有UPS能力的直流微电网中基于超级电容的DC-DC变换器技术

2015 IEEE First International Conference on DC Microgrids (ICDCM) Pub Date : 2015-06-07 DOI:10.1109/ICDCM.2015.7152021

Thilini Wickramasinghe, N. Kularatna, D. Steyn-Ross

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引用次数: 9

摘要

当直流负载由基于可再生能源(如光伏系统)的直流微电网供电时，由于电源的波动性，储能成为强制性的。DC-DC转换器内的局部dc能量存储可以满足这一要求。一种新型的超级电容辅助低差调节器(SCALDO)可以实现低噪声、快速瞬态响应的局部储能。对于广义SCALDO配置，端到端效率由(1 + k)(Vreg/Vp)给出，其中k等于n或1/n, n是将Vp的输入电压降压到Vreg的输出稳压所需的超级电容器的数量。对于基于scaldo的转换器，(1 + k)是Vp-to-Vreg标准线性稳压器的效率改进因子。

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Supercapacitor-based DC-DC converter technique for DC-microgrids with UPS capability

When DC loads are powered by a DC-microgrid (DCμG) based on a renewable source such as a PV system, energy storage becomes mandatory due to fluctuating nature of the source. Localized DC-energy storage within DC-DC converters could address this requirement. A variation of supercapacitor-assisted low-dropout regulators (SCALDO) could provide localized energy storage with low-noise and fast transient response. For a generalized SCALDO configuration, end-to-end efficiency is given by (1 + k)(Vreg/Vp) where k equals n or 1/n, and n is the number of supercapacitors required to step-down an input voltage of Vp, to an output regulated voltage of Vreg. For SCALDO-based converters, (1 + k) is the efficiency improvement factor of a Vp-to-Vreg standard linear regulator.

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2015 IEEE First International Conference on DC Microgrids (ICDCM)

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