Open AccessA method for evaluating the uncertainty of short-circuit current in power system with photovoltaic power generation
Author(s) -
Jiafang Wu,
Gang Chen,
Yanhui Xiao,
Jiajia Hu,
Guoqiang Chen,
Weiyan Qian,
Niancheng Zhou
Publication year - 2020
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.179
H-Index - 26
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/546/2/022025
Subject(s) - photovoltaic system , constant power circuit , maximum power point tracking , fault (geology) , electric power system , grid connected photovoltaic power system , short circuit , voltage , power (physics) , electronic engineering , computer science , low voltage ride through , electrical engineering , engineering , power factor , low voltage , physics , inverter , quantum mechanics , seismology , geology
Short-circuit current of power system with photovoltaic power generation is related to the fault current provided by the photovoltaic power supply. In this paper, based on the analysis of low voltage ride-through uncertain region of photovoltaic power generation, the random model of low voltage off-grid is constructed. Further combining with the system fault information, based on the monte carlo simulation, a probabilistic assessment method of short-circuit current in power system is proposed, which takes into account uncertainty of photovoltaic low voltage ride-through. Finally, an example is given to verify the proposed method. The method in this paper comprehensively considers the random factors of power grid failure and photovoltaic power generation low voltage off-grid, and the short-circuit current result can accurately reflect actual short-circuit current level of the system.