Abstract
Photovoltaic power is variable in nature as its output power continuously changes with the change in the solar irradiance level. This paper presents a method to balance power between the fixed power demand and the variable photovoltaic power. Perturbation and Observation algorithm is used to operate the photovoltaic system at maximum power point so that maximum power can be extracted from it. When solar photovoltaic power changes with the solar irradiance level, there is a power mismatch between the generated power and load power demand due to which the voltage across the DC link capacitor changes. This power mismatch is overcome by connecting battery energy storage device with DC link capacitor through bidirectional power converter. The bidirectional power converter is controlled to operate the battery in charging and discharging modes which help in power balance, thus stabilizing the voltage across DC link capacitor. Maintaining constant voltage across the DC link capacitor has many advantages such as connecting different energy storage devices directly to DC link capacitor and feeding DC loads, and it improves power quality when the inverter is operated and controlled as voltage source converter.
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Mohammad, S.S., Iqbal, S.J. (2021). Improved Dispatchability of Solar Photovoltaic System with Battery Energy Storage. In: Bose, M., Modi, A. (eds) Proceedings of the 7th International Conference on Advances in Energy Research. Springer Proceedings in Energy. Springer, Singapore. https://doi.org/10.1007/978-981-15-5955-6_96
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