Electric Power ›› 2020, Vol. 53 ›› Issue (10): 66-73.DOI: 10.11930/j.issn.1004-9649.202006027

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Optimal Capacity Configuration of Solar-Hydrogen Independent Power-Supply System Considering Electricity-Heat Comprehensive Utilization

XIONG Yufeng1, SI Yang1, ZHENG Tianwen2,3, CHEN Laijun3, MEI Shengwei3   

  1. 1. Department of Electrical Engineering, Tsinghua University, Beijing 100084, China;
    2. Sichuan Energy Internet Research Institute, Tsinghua University, Chengdu 610213, China;
    3. New Energy (Photovoltaic) Industry Research Center, Qinghai University, Xining 810016, China
  • Received:2020-06-02 Revised:2020-09-08 Published:2020-10-05
  • Supported by:
    This work is supported by National Natural Science Foundation of China (Modeling and Evolution of Multi-carrier Energy Systems, No.U1766203), Qinghai Fundamental Research Project (Research on Key Technologies of Clean Energy Self-sufficient Micro Energy Network in Qinghai Agricultural and Pastoral Areas, No.2018-ZJ-748), Qinghai Science and Technology Achievements Transformation Project (Research and Demonstration of Key Technologies of Photovoltaic Hydrogen Production and Fuel Cell Cogeneration System in Qinghai Agricultural and Pastoral Areas, No.2020-GX-107)

Abstract: Because of geographic limit and climate influence, the energy supply problem in remote regions of Qinghai-Tibetan Plateau has not been solved effectively. Considering of local characteristics of extended cold climate, abundant light resource and disperse load distribution, since hydrogen energy has advantages of non-pollution, carbon-free emission and high calorific value, this paper proposes a framework of solar-hydrogen independent power-supply system to realize heat-electricity comprehensive supply in extended cold areas. The heat-electricity united supply model of hydrogen storage system, containing electrolyzer, hydrogen tank and hydrogen fuel cell, is formed to make full of ability of heat-electricity joint stock and joint supply. On this basis, the capacity configuration model of solar-hydrogen independent power supply system is formulated and the optimization method is provided. By case study, the performance difference between solar-hydrogen independent power supply system and the current solar-battery independent system has been contrasted and analyzed. The feasibility of solar-hydrogen system independent power supply system has been validated, and the results are hopeful to provide new ideas and methods for distributed supply of clean power in remote regions of Qinghai-Tibetan Plateau.

Key words: hydrogen storage, photovoltaic, independent power-supply system, heat-electricity comprehensive utilization, optimal capacity configuration