Design and Development of PV-Battery System Resilient to Regulate Grid Power Injection and Grid Supportive Features using Artificial Intelligence

A PV setup with only one stage and a poor connection to the grid. The system has a bidirectional DC-DC converter that connects to a battery energy storage (BES). Nonlinear loading situations do not degrade the grid's power quality because of the system's design. In addition, the DC offset in the collected grid voltage signals owing to sensor circuit abnormalities does not affect the robustness of the control method. Many advantages are taken advantage of thanks to the BES's adaptability. Maintaining the prescribed grid power at varying local demands solves the intermittent power injection problem that is inherent to PV systems. The designed control employs the BES to regulate grid power, hence maximizing financial returns by functioning as a power sink during less tariff times. In contrast to the standard single stage system, which regularly trips and shuts down due to overcurrent, the control allows fault ride through and prevents tripping at high voltage drops. The device aids the utility by halting power flow to the grid during a big voltage spike while permitting electricity import from the grid. The regulated transition to recovery mode protects the BES from being overcharged or undercharged. Moreover, peak power is extracted from the PV array without degrading grid power quality because to dual mode regulation of the DC link voltage.

I. Introduction

People and governments alike are looking into renewable energy options because of the unpredictability of the fossil fuel industry. Solar photovoltaic (PV) energy is expected to expand fast in the next years as a solution to this looming energy shortage. Solar photovoltaic (PV) electricity also boasts three additional important benefits: its accessibility, its cleanliness, and its suitability for dispersed generation. In addition to being bad for grid power quality and stability, PV electricity's intermittent nature makes it difficult for utilities to maintain a steady power supply throughout their distribution networks [1].