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Journal of Power, Energy, and Control
Published by MSD Institute
ISSN : -     EISSN : 30478804     DOI : -
Core Subject : Science, Engineering,
Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering Mechanical Engineering
Journal of Power, Energy, and Control (PEC) mainly focuses on power engineering, energy engineering, renewable energy, control systems in energy application, and various sustainable energy applications. PEC welcomes the submission of high quality original research papers, review papers, and case study reports.
Arjuna Subject : Energi (semua kategori) - Teknik Energi dan Teknologi Daya
Articles 2 Documents
 1 
Search results for , issue "vol. 3 no. 2 (2026)" : 2 Documents clear
Observer-Assisted Compensation of Three-Phase Current Unbalance in Scott-Transformer Railway Power Systems Using Back-to-Back Converters Benjamin Egyin Wilson; Bernard Arhin; Nur-A-Adam Dony; Emmanuel Agyepong Nyantakyi
Journal of Power, Energy, and Control Vol. 3 No. 2 (2026)
Publisher : MSD Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62777/pec.v3i2.117

Abstract

This paper presents an experimental comparison of two control strategies for mitigating three-phase current unbalance in Scott-transformer-fed railway power systems. Both methods employ the same single-phase three-level back-to-back converter, but they differ in the variable used to generate the compensation command. The first strategy derives the reference from load-side active and reactive power, whereas the second generates the reference directly from the Scott-transformer secondary current, thereby targeting the source-side balance condition more directly. To ensure reliable synchronization under low-switching-frequency operation and notch-distorted secondary voltage, an observer-assisted synchronous reference frame phase-locked loop is adopted ahead of the control stage. The proposed approaches are validated experimentally on a 5 kVA laboratory prototype. The measured results show that the three-phase current-unbalance ratio is reduced from 34.2% before compensation to 2.8% with the power-based strategy and to 1.2% with the current-based strategy. In addition, both methods maintain stable DC-link operation and exhibit comparable harmonic and current-tracking performance. These results demonstrate that source-current-oriented compensation based on Scott-transformer secondary current provides superior balancing performance for railway applications with strongly varying single-phase loads.
Finite-Time Event-Triggered Distributed Cooperative Secondary Control for Islanded Microgrids with Plug-and-Play Capability and Communication Delay Robustness Md Nur-A-Adam Dony; Bernard Arhin; Benjamin Egyin Wilson; Emmanuel Agyepong Nyantakyi
Journal of Power, Energy, and Control Vol. 3 No. 2 (2026)
Publisher : MSD Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62777/pec.v3i2.118

Abstract

Distributed Cooperative Secondary Control (DCSC) is a critical layer in the hierarchical control architecture of islanded microgrids, responsible for eliminating steady-state voltage and frequency deviations introduced by primary droop control. However, conventional linear DCSC strategies suffer from four fundamental limitations: (i) asymptotic convergence with settling times dependent on initial conditions, (ii) continuous communication requirements that consume excessive bandwidth, (iii) vulnerability to abrupt topology changes during Plug-and-Play (PnP) operations, and (iv) performance degradation under communication time delays. This paper proposes a unified Finite-Time Event-Triggered DCSC (FT-ET-DCSC) framework that simultaneously addresses all four challenges. A nonlinear signed-power consensus protocol guarantees exact voltage synchronization within a strict, calculable finite time bound that is independent of initial conditions. A state-dependent event-triggered communication mechanism reduces bandwidth utilization by over 98% relative to a continuous-transmission baseline while provably excluding Zeno behavior. Rigorous Lyapunov-based stability analysis proves finite-time convergence, and a Lyapunov–Krasovskii functional approach establishes delay-dependent robustness, with stable operation under time-varying communication delays confirmed in simulation up to 500 ms. Furthermore, the framework maintains absolute stability under switching communication topologies induced by PnP events via a common Lyapunov function argument. Comprehensive simulations of a heterogeneous 4-DG microgrid validate the theoretical claims, demonstrating up to a 4.28× convergence speedup over linear methods, seamless recovery during dynamic DG disconnection and reconnection, and stable operation under severe network delays.

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