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Dynamic model and impact on power quality of large hydro‐photovoltaic power complementary plant
Author(s) -
Zhang Minglu,
Xie Tingting,
Zhang Changbing,
Chen Duan,
Mao Cheng,
Shen Chunhe
Publication year - 2019
Publication title -
international journal of energy research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.808
H-Index - 95
eISSN - 1099-114X
pISSN - 0363-907X
DOI - 10.1002/er.4569
Subject(s) - hydropower , photovoltaic system , power (physics) , base load power plant , maximum power point tracking , grid connected photovoltaic power system , electric power system , power station , environmental science , automotive engineering , engineering , electrical engineering , control theory (sociology) , computer science , distributed generation , renewable energy , voltage , control (management) , physics , quantum mechanics , inverter , artificial intelligence
Summary In recent years, with the rapid growth of photovoltaic (PV) power development and utilization, part of the PV power could not be transmitted to the power grid owing to the impact of PV power fluctuation on power quality, leading to a serious PV power rejection in some areas in China. A high‐order model of a hydro‐PV power plant is developed in this paper not only to predict hydropower compensation for PV power fluctuation but also to consider the impact of complementary regulation on power quality. Compared with the existing complementary models, the presented model accurately reveals the effect of water hammer on power quality, low‐frequency power oscillation, and power antiregulation phenomenon during the complementary regulation. Although the complementary control of the hydro‐PV power plant helps to suppress power fluctuation, when the PV power and objective power are negative covariation, the hydropower needs more regulation, which will cause an increase in frequency fluctuation. Moreover, with the increase of the ratio of hydro‐PV power in the power grid, the frequency fluctuation amplitude increases accordingly. Especially, when PV power exceeds the regulation ability of the hydropower, the system frequency deviation will increase rapidly. These problems are worth the attention to the future development of PV power.