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All Journal International Journal of Power Electronics and Drive Systems (IJPEDS) Indonesian Journal of Electrical Engineering and Computer Science
Daud, Noor Dzulaikha
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Control & Systems Engineering Electrical & Electronics Engineering

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A comparative analysis of hybrid of traditional load flow methods for IEEE distributed power generation networks Mohamed Hariri, Muhammad Hafeez; Daud, Noor Dzulaikha; Mohd Yusoff, Nor Azizah; Syed Zaman, Syed Muhammad Zakwan; Mat Desa, Mohd Khairunaz
Indonesian Journal of Electrical Engineering and Computer Science Vol 39, No 1: July 2025
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v39.i1.pp33-44

Abstract

Analyzing power flow or load flow is crucial for planning, operating, maintaining, and controlling electrical power systems. Two traditional power flow methods namely the Newton-Raphson (NR) method are known for their accuracy and robustness nevertheless high computational intensity, and the fast decoupled load flow (FD) method, is valued for its computational efficiency and speed, however, generating less accurate data. This research aims to develop a hybrid load flow technique that integrates both strengths, achieving higher accuracy and faster convergence. The validation processes are based on several IEEE standard bus systems, including the 3-bus, 9-bus, 14-bus, and 30-bus systems. These systems, with different bus types and interconnections, represent real-world operations and help generate comprehensive data on iteration count, execution time, and the accuracy of the output data results. A new hybrid method generated from this research work compared to traditional load flow methods, provides a substantially well-balanced number of iteration counts, the fastest execution times, improved by 41.55%, and produces a similar accuracy of the data set. These improvements make the hybrid method highly advantageous in practical real-time applications and large-scale systems where both accuracy and speed are critical.
Dead time control signal for non-isolated synchronous buck DC-DC converter Hariri, Muhammad Hafeez Mohamed; Daud, Noor Dzulaikha; Sutikno, Tole; Yusoff, Nor Azizah Mohd; Desa, Mohd Khairunaz Mat
International Journal of Power Electronics and Drive Systems (IJPEDS) Vol 16, No 3: September 2025
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijpeds.v16.i3.pp1765-1774

Abstract

This study introduces a simple dead-time control signal for the non-isolated synchronous buck DC-DC converter, incorporated alongside maximum power point tracking (MPPT) for a stand-alone photovoltaic (PV) system. Dead-time control in non-isolated DC-DC converters is challenging due to difficulties in accurately sensing and predicting errors, especially during the transition between switching modes. The introduction of the dead-time control method resulted in optimal efficiency for the stand-alone PV system. The dead-time control was implemented in the hardware prototype using a bootstrap technique. Power generation from the PV module was optimized through the DC converter's implementation of an improved perturb and observe (P&O) MPPT approach. According to the results, the proposed design achieved an overall system efficiency of 80%. Moreover, the enhanced P&O MPPT algorithm prototype was observed to produce a maximum output power of 60 W.
Co-Authors Desa, Mohd Khairunaz Mat Hariri, Muhammad Hafeez Mohamed Mat Desa, Mohd Khairunaz Mohamed Hariri, Muhammad Hafeez Nor Azizah Mohd Yusoff Syed Zaman, Syed Muhammad Zakwan Tole Sutikno Yusoff, Nor Azizah Mohd