TY - JOUR
T1 - Multi-objective optimization of a hydro-wind-photovoltaic power complementary plant with a vibration avoidance strategy
AU - Xiong, Hualin
AU - Egusquiza, Mònica
AU - Alberg Østergaard, Poul
AU - Pérez-Díaz, Juan I.
AU - Sun, Guoxiu
AU - Egusquiza, Eduard
AU - Patelli, Edoardo
AU - Xu, Beibei
AU - Duan, Hongjiang
AU - Chen, Diyi
AU - Luo, Xingqi
PY - 2021/11/1
Y1 - 2021/11/1
N2 - Hydropower has the advantages of quickly responding to load variability, which overcomes the unpredictable and unstable variabilities of solar and wind power. Therefore, such power generation can be combined into a hydro-wind-photovoltaic complementary plant (HWPCP). However, hydropower units running at partial load are prone to suffer from hydraulic instabilities generated by a cavitating vortex rope, which may lead to power swings and high vibrations. Operation in these vibration zones may affect the operation and ultimately cause structural damage and affect the power plant. The problem of avoiding running hydropower units in the vibration zones is effectively addressed in this study. This is achieved by adopting a vibration avoidance strategy to determine a rational power distribution scheme for hydropower units. Multi-objective optimization is performed to maximize power generation, minimize output power fluctuations, and minimize the deviation between the power generation and the planned output. The power distribution strategies of hydropower units under 12 scenarios, composed of different inflow and weather conditions, are analyzed. The results indicate that the vibration avoidance strategy effectively avoids the operation of hydropower units in the vibration zones and ensures the operation of hydropower units in the non-vibration zone for more than 99.31% of the operation time. This study contributes to the identification of the relationship between conflicting objectives and provides operational strategies for the safe and stable operation of hydropower units.
AB - Hydropower has the advantages of quickly responding to load variability, which overcomes the unpredictable and unstable variabilities of solar and wind power. Therefore, such power generation can be combined into a hydro-wind-photovoltaic complementary plant (HWPCP). However, hydropower units running at partial load are prone to suffer from hydraulic instabilities generated by a cavitating vortex rope, which may lead to power swings and high vibrations. Operation in these vibration zones may affect the operation and ultimately cause structural damage and affect the power plant. The problem of avoiding running hydropower units in the vibration zones is effectively addressed in this study. This is achieved by adopting a vibration avoidance strategy to determine a rational power distribution scheme for hydropower units. Multi-objective optimization is performed to maximize power generation, minimize output power fluctuations, and minimize the deviation between the power generation and the planned output. The power distribution strategies of hydropower units under 12 scenarios, composed of different inflow and weather conditions, are analyzed. The results indicate that the vibration avoidance strategy effectively avoids the operation of hydropower units in the vibration zones and ensures the operation of hydropower units in the non-vibration zone for more than 99.31% of the operation time. This study contributes to the identification of the relationship between conflicting objectives and provides operational strategies for the safe and stable operation of hydropower units.
KW - coordinated optimized operation
KW - hydro-wind-photovoltaic
KW - multi-objective optimization
KW - vibration zone
U2 - 10.1016/j.apenergy.2021.117459
DO - 10.1016/j.apenergy.2021.117459
M3 - Article
AN - SCOPUS:85112380616
SN - 0306-2619
VL - 301
JO - Applied Energy
JF - Applied Energy
M1 - 117459
ER -
