Multiscale power fluctuation evaluation of a hydro-wind-photovoltaic system

RENEWABLE ENERGY

卷:175

Article

Xiong, Hualin^1,2  Xu, Beibei^1,2  Kheav, Kimleng^1,2  Luo, Xingqi⁴  Zhang, Xingjin^1,2  Patelli, Edoardo³  Guo, Pengcheng⁴  Chen, Diyi^1,2 

[1] Northwest A&F Univ, Inst Water Resources & Hydropower Res, Yangling 712100, Shaanxi, Peoples R China

[2] Northwest A&F Univ, Key Lab Agr Soil & Water Engn Arid & Semiarid Are, Minist Educ, Yangling 712100, Shaanxi, Peoples R China

[3] Univ Strathclyde, Ctr Intelligent Infrastruct, Dept Civil & Environm Engn, 75 Montrose St, Glasgow G1 1XJ, Lanark, Scotland

[4] Xian Univ Technol, State Key Lab Based Ecohydraul Engn Arid Area, Xian 710048, Shaanxi, Peoples R China

关键词: Hybrid energy system;    Continuous time scale;    Stability evaluation;    Hydropower complementation;   

DOI  :  10.1016/j.renene.2021.04.095

来源: Elsevier

【 摘 要 】

The hybrid energy systems are required to operate stably in different time scales. Previous studies on the stability are carried out under the unrealistic assumption of discontinuous time scales. Therefore, a second time scale model for the hybrid energy systems is presented in this study. To overcome the possible uncertainty caused by the discontinuous time scale assumption, a new method is introduced to analyze power fluctuations for the hybrid power system considering the hydroelectric power station (HPS) and PV-wind complementarity. Compared with traditional statistics, the proposed three indices, discussed in terms of variation frequency, have the ability to show the stability and complementarity characteristics of the hybrid system with the time scale varying from second to hour, The results show that the volatility of wind power and photoelectric increase with the increase of time scale. In (10(0), 10(2)) seconds, the HPS could not compensate for as they do not meet flexibility demand in that particular frequency domain, and hydro-electric power is able to compensate wind and PV power sources well when the time scale is over 10(2) s. The obtained stability evolution law has important reference significance for the subsequent studies on the stability of hybrid energy systems. (C) 2021 Elsevier Ltd. All rights reserved.

【 授权许可】

Free