TIME SEQUENCE ENERGY EFFICIENCY COMPARISON OF AC AND DC DISTRIBUTION SYSTEMS CONSIDERING SOURCE AND LOAD POWER CHARACTERISTICS

Wang Lei; Yan Zhichao; Han Xiaoqing; Li Shengwen; Liu Jiangtao; Wen Minmin

doi:10.19912/j.0254-0096.tynxb.2022-1673

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Acta Energiae Solaris Sinica ›› 2023, Vol. 44 ›› Issue (10) : 97-106. DOI: 10.19912/j.0254-0096.tynxb.2022-1673

TIME SEQUENCE ENERGY EFFICIENCY COMPARISON OF AC AND DC DISTRIBUTION SYSTEMS CONSIDERING SOURCE AND LOAD POWER CHARACTERISTICS

Wang Lei¹, Yan Zhichao¹, Han Xiaoqing¹, Li Shengwen², Liu Jiangtao³, Wen Minmin¹

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Abstract

This paper proposes a method of energy efficiency evaluation based on the source and load characteristics, and compares the energy efficiency of AC and DC distribution networks. Firstly, a detailed power model of photovoltaics, energy storage, electric vehicles and other office load are developed. Then, based on typical structure of low voltage AC and DC distribution system, the efficiency function of the converter and line loss model are established. The AC and DC energy efficiency comparison method considering power characteristics is studied, and the comparative analysis of energy efficiency based on time sequence is presented under the different operating conditions and capacity proportions in AC and DC systems. Finally, the energy efficiency comparison is presented for the same AC and DC distribution structure based on DC demonstration project.

Key words

energy storage / PV power / DC power transmission / energy efficiency / electric power distribution / distributed power generation / power characteristics

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Wang Lei, Yan Zhichao, Han Xiaoqing, Li Shengwen, Liu Jiangtao, Wen Minmin. TIME SEQUENCE ENERGY EFFICIENCY COMPARISON OF AC AND DC DISTRIBUTION SYSTEMS CONSIDERING SOURCE AND LOAD POWER CHARACTERISTICS[J]. Acta Energiae Solaris Sinica. 2023, 44(10): 97-106 https://doi.org/10.19912/j.0254-0096.tynxb.2022-1673

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