Finite-Time control scheme for effective voltage and frequency regulation in networked microgrids
Nima Khosravi
Abstract
• The finite-time control scheme (FTCS) enhances voltage and frequency stability in microgrids (MGs). • FTCS demonstrates superior performance over sliding mode control, particularly in isolated MG setups. • Active power output increases by 8% with FTCS across various scenarios. • FTCS offers a robust solution for integrating renewable energy sources in smart energy systems. Voltage and frequency stability are crucial challenges in the operation of microgrids (MGs), particularly with the increasing integration of renewable energy sources (RESs) that introduce variability and uncertainty. Additionally, as energy demand grows, traditional control methods often struggle to maintain stability under dynamic conditions, highlighting the need for more robust solutions. This study introduces a finite-time control scheme (FTCS) for pulse-width modulation (PWM) control in MG systems, designed to improve voltage and frequency regulation within a set timeframe. By integrating FTCS into the power droop controller, rapid and precise regulation is achieved, surpassing traditional methods. Comparative analysis with sliding mode control (SMC) demonstrates FTCS’s superior performance, particularly in isolated island configurations. MATLAB simulations across three MG scenarios show significant improvements in key metrics, such as voltage and power fluctuations, load current oscillations, and active/reactive power outputs. Based on the results, key parameters improved with a 50% decrease in voltage drops in MGs, an 8% increase in active power output, and a 90% reduction in frequency deviations, highlighting FTCS’s effectiveness. These findings underscore FTCS’s potential to enhance system performance, offering a more reliable and resilient solution for managing the challenges associated with RES integration in smart energy systems.