Research Article
Improved Microgrid Controller with Robust Stability, Conjunction with PID Controllers
Issue:
Volume 13, Issue 3, June 2025
Pages:
116-130
Received:
28 March 2025
Accepted:
15 April 2025
Published:
26 May 2025
Abstract: Microgrids are gaining prominence as essential components of modern power systems, particularly in facilitating renewable energy integration and enhancing system resilience. However, the inherent complexity and dynamic behavior of microgrids present significant control challenges, including voltage stability, frequency regulation, and fault mitigation. This paper proposes an improved microgrid controller designed to ensure robust stability under varying and uncertain operating conditions. The controller integrates a Linear Matrix Inequality (LMI)-based design approach with Proportional-Integral-Derivative (PID) control strategies, enabling adaptive and efficient performance tuning. By employing the Lyapunov stability theory and Linear Quadratic Regulator (LQR) principles, the proposed controller minimizes control effort while maintaining system robustness in the presence of nonlinearities, parametric uncertainties, harmonic distortions, and dynamic load variations. Detailed modeling of both single-phase and three-phase microgrid systems is presented, incorporating critical components such as voltage source inverters (VSIs), LC filters, and transformers. The controller's design is validated through extensive simulations, evaluating its response to various real-world load conditions, including harmonic, non-linear, dynamic, asynchronous, and unknown loads. Results demonstrate the controller’s effectiveness in reducing Total Harmonic Distortion (THD), maintaining voltage and current stability, and enhancing system adaptability during faults and operational fluctuations. A comparative analysis with conventional controllers further underscores the improved controller's superior performance in ensuring stability and reliability. This study contributes a scalable and resilient control framework, well-suited for evolving smart grid environments and high-penetration renewable energy systems.
Abstract: Microgrids are gaining prominence as essential components of modern power systems, particularly in facilitating renewable energy integration and enhancing system resilience. However, the inherent complexity and dynamic behavior of microgrids present significant control challenges, including voltage stability, frequency regulation, and fault mitigat...
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Research Article
Evaluating the Application of Zero Trust Architecture (ZTA) Implementation in Nigeria's Banking Industry
Adewale Ashogbon*
,
Oscar Okpere
Issue:
Volume 13, Issue 3, June 2025
Pages:
131-142
Received:
22 May 2025
Accepted:
5 June 2025
Published:
23 June 2025
DOI:
10.11648/j.jeee.20251303.12
Downloads:
Views:
Abstract: The growing number and sophistication of cyberattacks against financial institutions have underscored the need for a more robust cybersecurity framework in Nigeria’s banking industry. This research examines the implementation of Zero Trust Architecture (ZTA), a contemporary security model that focuses on identity authentication, the principle of least privilege, and micro-segmentation to mitigate threats. The primary objectives were to assess the level of adoption of ZTA principles in Nigerian banks, identify the challenges associated with ZTA implementation, and evaluate the impact of ZTA on cybersecurity resilience and regulatory compliance. A quantitative research approach was employed, and structured questionnaires were used to gather data from IT and security professionals, banking personnel, and regulators. The collected data were analyzed using statistical techniques, such as SPSS, to generate descriptive statistics. The findings indicate a moderate level of implementation, with high adoption of identity verification practices but low adoption of more advanced practices, such as micro-segmentation and real-time authentication. Notable barriers include high implementation costs, difficulties integrating with legacy systems, and a shortage of cybersecurity professionals. However, despite these difficulties, it was found that ZTA had a positive impact on banks' ability to detect and address cyber threats, as well as enhance compliance with regulatory standards, such as the NDPR, PCI DSS, and SWIFT CSP. The research highlights the need to adopt a phased, strategic approach to ZTA integration, bolster regulatory support, and enhance capacity building. This research contributes to the growing body of knowledge in the field of cybersecurity in emerging economies, providing practical recommendations for policymakers and financial institutions.
Abstract: The growing number and sophistication of cyberattacks against financial institutions have underscored the need for a more robust cybersecurity framework in Nigeria’s banking industry. This research examines the implementation of Zero Trust Architecture (ZTA), a contemporary security model that focuses on identity authentication, the principle of le...
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