article · Alexandria Engineering Journal
Maintaining voltage stability and power quality is critical for hybrid electrical networks that integrate diverse renewable energy sources. Research examines the use of intelligent fuzzy-PI and fuzzy-PID current controllers alongside a distribution static synchronous compensator to regulate an AC-DC microgrid. Evaluated through conditions simulating sudden faults and dynamic load changes, the fuzzy controllers provide optimum dynamic responses to power quality disturbances. Detailed numerical comparisons show that both controllers decrease voltage fluctuations at the compensator and improve dynamic response relative to an uncontrolled system. Overall, the fuzzy-PID controller outperforms the fuzzy-PI option by achieving smoother signals, smaller voltage fluctuations, and superior dynamic stability across both fault and load change scenarios.
Modern power systems increasingly combine alternating current and direct current networks powered by variable renewable resources. Abrupt electrical faults and shifting loads can introduce severe instability, threatening sensitive equipment and overall grid reliability. Applying intelligent fuzzy controllers to manage reactive power compensation helps stabilise voltage levels, protect microgrid infrastructure, and maintain continuous, high-quality electricity delivery under challenging operational conditions.
The controllers could be integrated into grid-management software and commercial compensator hardware for hybrid microgrids, renewable energy parks, and industrial facilities. Grid operators and power electronics manufacturers are primary potential users. Based on the provided abstract, the work is early-stage applied research evaluated through numerical simulations, meaning it requires physical prototyping and experimental testing on hardware before it can approach commercial deployment.
AI-generated from the published abstract. Always read the original work before citing.
Voltage stability and power quality play very effective issues in power systems. This paper aims to improve the voltage stability and enhance system power quality in the AC-DC micro-grid system based on intelligent fuzzy controllers. These controllers are fuzzy-PI (FPI) and fuzzy-PID (FPID) current-controller with the existence of distribution static synchronous compensator (D-STATCOM). The capability of proposed system has been applied in two case studies that emulate abrupt fault and dynamic load changes on AC-DC hybrid micro-grid that collects different types of renewable energy sources. In addition to, the proposed fuzzy-based controllers produce the optimum dynamic response and resolve the power quality issues. Numerical simulations associated with detailed comparisons between different controllers are provided. It was found that when the studied system is subjected to a 3-phase fault, the voltage fluctuation at the D-STATCOM is reduced by 7.86% and 4.62% and the dynamic system performance is improved by 12.9% and 8.8% with using Fuzzy-PID and fuzzy-PI, respectively. Also with the dynamic load changes, the fluctuation of system voltages at the D-STATCOM is reduced by 0.982% and 0.577 % and the dynamic system performance is improved with 6.67%, 5.71% when comparing Fuzzy-PID controller and Fuzzy-PI to the uncontrolled system. The Fuzzy-PID provides a capability to enhance dynamic performance and system power quality because achieve less fluctuation and more smoothing for signals makes it is superior for voltage control for AC-DC micro-grid.
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DOI: 10.1016/j.aej.2021.07.012
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