Impact of inertial control on battery energy storage requirements in wind-integrated power systems
Keywords:
Batteries, Energy Storage Systems, Frequency Support, Inertial Control, Wind TurbineAbstract
The increasing penetration of wind energy in modern power systems has intensified the need for advanced frequency regulation strategies capable of preserving grid stability under low-inertia conditions. In this context, inertial control of wind turbines, complemented by energy storage systems (ESS), represents a promising approach to enhance frequency response during contingency events. This paper investigates, through detailed time-domain simulations, the impact of advanced inertial control strategies on the energy storage requirements associated with frequency regulation tasks. Two control schemes are analyzed: (i) an extended optimized power point tracking (OPPTE) method and (ii) an adaptive OPPTE strategy enhanced with a fuzzy logic controller (OPPTE-FLC). Both approaches are coordinated with a battery energy storage system (BESS) equipped with state-of-charge feedback control (SOC-FB) to ensure operational sustainability. Simulation results demonstrate that the coordinated OPPTE-FLC and BESS framework significantly enhances dynamic performance during frequency disturbances. In particular, the proposed strategy increases the peak active power injection during contingencies by approximately 15\% and yields a notable improvement in frequency nadir compared to the conventional OPPTE-based approach.
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