State of charge and state of power management of the hybrid energy storage system in an architecture of microgrid (original) (raw)
2019, Journal of Renewable and Sustainable Energy
This paper develops state variables for storage units and evaluates their performance in hybrid storage systems. To ensure an equalised storage utilisation factor, a self-tuned dynamic exponent controller is designed. The decentralised controller manages the state of charge within the high specific energy based hybrid storage units. Furthermore, to address the instability of the dc bus voltage, this paper proposes a fuzzy logic integrated dynamic PI based controller. The designed controller manages the state of power by regulating the compensation level of the high specific power based hybrid storage units during the transients. The improvement of the system stability through the proposed controllers is evaluated using the Nyquist stability criterion.
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