Advanced Adaptive Control for Dynamic Performance Enhancement of a Grid‐Tied Photovoltaic Hybrid Energy Storage System

ABSTRACT

This paper investigates the dynamic performance of a three‐phase, three‐wire, dual‐stage grid‐synchronized photovoltaic (PV)‐hybrid energy storage system (HESS) through Hardware‐in‐Loop (HIL) prototyping. Sigmoid Least Logarithmic Absolute Difference (SLLAD) regulator is implemented for Voltage Source Converter (VSC) control. SLLAD with a mixed norm function ensures rapid convergence characteristics while minimizing steady‐state error. SLLAD permits the VSC to accomplish multiple grid‐following and grid‐supportive functions, in addition to PV power injection to the grid through Point of Common Coupling (PCC). SLLAD‐controlled VSC effectively mitigates current harmonics, balances load, and compensates active/reactive power at PCC, thereby providing short‐term ancillary services to the grid with integrated HESS. HESS, comprising a battery and ultracapacitor (UC), manages transient and sustained uncertainties associated with intermittent PV power generation and load variations. Second Order Generalized Integrator (SOGI)‐Frequency Locked Loop (FLL) algorithm is utilized to filter distorted grid voltages during distorted grid conditions. In HIL setup, PV‐HESS plant is simulated using OP5700, and SOGI‐FLL‐assisted SLLAD control strategy is implemented on TMS320F28379 microcontroller. Experimentation outcomes validate the proposed PV‐HESS system and confirm its compliance with IEEE 1547 standards.