Successive Approximation Register Maximum Power Point Tracking Control with modified PWM-VSI STATCOM for active and reactive power management in a utility grid tied solar photovoltaic system

Abstract

A photovoltaic micro grid linked to a utility grid requires active and reactive power control. Active power balances generation and load demand, preventing oversupply or overloading. The Static Synchronous Compensator (STATCOM) based on a Pulse Width Modulation (PWM) Voltage Source Inverter (VSI) is used to control these power flows, enhancing grid stability, power quality, and energy efficiency. Reactive power is crucial for maintaining voltage levels within the grid, especially in distribution networks with high PV penetration. STATCOM, a PWM-VSI-based system, manages reactive power flow by dynamically adjusting the inverter's output voltage to compensate for voltage fluctuations and maintain a stable voltage profile. Reactive power management enhances reliability and quality in micro grid connected utility grid by minimizing issues like voltage sags, flickers, and power losses. In this proposed system, the modified PWM-VSI STATCOM regulates PV system voltage and current waveforms using P&O MPPT controller and SAR MPPT controller, ensuring grid stability during variable solar generation. Active power and reactive power controlling by implementing SAR MPPT connected SPV system tied 400 V,50 Hz utility grid integrated modified PWM-VSI STATCOM controller is superior as compared to the P&O MPPT connected SPV system tied 400 V, 50 Hz utility grid integrated modified PWM-VSI STATCOM controller in terms of active power management and reactive power control. In this proposed system, it has been observed that the SAR MPPT control based SPV plant is capable to extract 13.56 KW power & 883.9 V whereas P&O control based SPV plant is capable to extract 13.47 KW power, 882.7 V.