Novel Fractional-Order Proportional-Integral Controller for Hybrid Power System with Solar Grid and Reheated Thermal Generator

Abstract

This paper presents a new fractional-order proportional-integral, (PI)λ (FO[PI]) type structure to investigate the load frequency control (LFC) problem. In the literature, some controllers’ extensive tuning options may slow or complicate the optimization process. Due to the intricacy of the tuning, even if there are fewer tuning parameters, a robust structure can be obtained. The (PI)λ structure deviates from the standard FOPI, integer PID, or PI-PD controllers with the same or fewer tuning parameters. The efficacy of a tri-parametric fractional-order controller is examined on a two-area interconnected hybrid power system comprising a photovoltaic (PV) grid and a Reheated Thermal Generator (RTG). In order to obtain optimal performance with lower control efforts, a novel dual-performance index is developed for the LFC problem. Various analyses are also proven to perform better than other optimized controllers from the recent literature. The presented scheme is significantly robust to disturbance interruptions, non-linearities, and parameter perturbations. It is also observed that there are no stability issues due to communication time delays. It is highlighted that the improvement can be obtained without adding complex structure or controller parameters.

Analyzing Small-Signal Stability in a Multi-Source Single-Area Power System with a Load-Frequency Controller Coordinated with a Photovoltaic System

“…Radiation and temperature are pivotal factors influencing the energy output of solar panels [67]. Given the instantaneous variability in the output power of photovoltaic systems, their impact on the primary frequency response holds significant importance [68].…”

Automatic Generation Control of a Hybrid PV-Reheat Thermal Power System Using RIME Algorithm

“…Beyond the traditional proportional-integral (PI) controllers [1]- [4], a number of controllers are emerging in the complex field of AGC for power systems integrating RES. The exploration of advanced control strategies includes fractional-order PI (FOPI) [8], which introduces a nuanced fractional calculus element, proportional-integral-derivative (PID) [9], which provides enhanced dynamics, FOPID [10], which integrates fractional calculus for improved tuning flexibility, and fractional order fuzzy PID (FOFPID) [11], which fuses fuzzy logic with fractional-order dynamics for a more adaptive and robust control paradigm. The critical role these controllers play in influencing power system response highlights the importance of accurately setting their parameters.…”