Open AccessStudy on charge and discharge control strategy of supercapacitor in photovoltaic system
Author(s) -
Yongqing Wei,
Xiaofeng Zhao,
Fei Yu,
Peng Zhu
Publication year - 2017
Publication title -
the journal of engineering
Language(s) - English
Resource type - Journals
ISSN - 2051-3305
DOI - 10.1049/joe.2017.0529
Subject(s) - supercapacitor , energy storage , photovoltaic system , microgrid , reliability (semiconductor) , power (physics) , inverter , voltage , capacitor , automotive engineering , computer data storage , computer science , electrical engineering , materials science , engineering , capacitance , electrode , physics , quantum mechanics , chemistry , operating system
The output power of the photovoltaic (PV) system is random and requires a certain amount of storage capacity to ensure the reliability and continuity of the power supply. The supercapacitor storage can discharge fast, and the energy density is high, so it is an ideal energy storage element. This study has studied the capacitor energy storage system configured in the PV system, by controlling the output power balance between the microgrid and three‐phase inverter to maintain the DC bus voltage stability, and has proposed, respectively, the control strategies of charging and discharging. The simulation results show that when the light or load power changes, the supercapacitor energy storage system can achieve the stability of the DC bus voltage, which verify the validity of the proposed control strategy.