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All Journal International Journal of Electrical and Computer Engineering Edugama: Jurnal Kependidikan dan Sosial Keagamaan
Hamdan, Mohammad
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Humanities Computer Science & IT Education Electrical & Electronics Engineering Languange, Linguistic, Communication & Media Social Sciences Other

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Modelling and control of LCL voltage source converter-based hybrid high voltage alternating current/high voltage direct current system Saadeh, Mahmood; Hamdan, Mohammad; Saadeh, Osama
International Journal of Electrical and Computer Engineering (IJECE) Vol 15, No 2: April 2025
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijece.v15i2.pp1297-1321

Abstract

Voltage source converters (VSCs) have revolutionized high voltage direct current (HVDC) transmission, offering numerous advantages such as black start capability, absence of commutation failure, and efficient control of bidirectional power flow. This study introduces a comparative analysis of advanced VSC technologies, focusing on a novel series hybrid converter incorporating an inductor-capacitor-inductor (LCL) passive circuit. This configuration is explored for its potential to enhance both high voltage alternating current (HVAC) and high voltage direct current (HVDC) side fault suppression capabilities and improve DC output voltage quality, addressing critical drawbacks of traditional VSCs. Through comprehensive simulations in MATLAB/Simulink, this research evaluates and compares three different converter topologies: the three-level neutral point clamped converter, the hybrid converter with AC side cascaded H-bridge cells, and the LCL hybrid converter. The comparison is based on key performance metrics such as DC output voltage quality, fault suppression capabilities, and system efficiency during normal and fault conditions. The study finds that the LCL hybrid converter outperforms traditional converters by significantly improving DC output voltage quality and enhancing fault suppression capabilities in HVDC systems. It effectively reduces ripple and maintains stability during faults, making it a superior choice for future HVDC converter designs and applications, offering valuable insights for advancing HVDC technology.
Pengaruh Gaya Kepemimpinan Kepala Sekolah Terhadap Kemajuan SD Muhammadiyah Jogokariyan Hamdan, Mohammad; Hidayati, Dian
Edugama: Jurnal Kependidikan dan Sosial Keagamaan Vol. 7 No. 1 (2021): Edugama: Jurnal Kependidikan dan Sosial Keagamaan
Publisher : PASCASARJANA IAIN SYAIKH ABDURRAHMAN SIDDIK BANGKA BELITUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32923/edugama.v7i1.1826

Abstract

The transactional, transformational, and formal legal leadership models of school principals for educators and education staff play an important role in determining the progress of the institution they lead. The purpose of this study is to describe that the leadership style of the principal of SD Muhammadiyah Jogokariyan influences the progress of SD Muhammadiyah Jogokariyan. This study uses descriptive qualitative methods, data collection techniques through observation, interviews, and documentation. The results showed that (1) the Principal of SD Muhammadiyah Jogokariyan applied a transactional leadership style, namely the principal focused on the role of coordinator, supervisor, and team performance appraisal. The principal is responsible for individual performance to achieve the best final result. Principals give awards to teachers who excel as motivation for other teachers. The Principal of SD Muhammadiyah Jogokariyan also applies transformational leadership, which is enthusiastic about helping teachers who have difficulties in classroom administration or other matters related to education in schools so that teachers continue to be enthusiastic in serving in the world of education. (2) a positive leadership style is the right alternative for school progress, namely building a positive school climate, establishing positive relationships between school members and local residents, and positive communication between school residents. (3) The Principal of SD Muhammadiyah Jogokariyan uses a humanist approach by holding regular weekly meetings with school residents or visiting the homes of community leaders to invite together to promote SD Muhammadiyah Jogokariyan
Co-Authors Hidayati, Dian Saadeh, Mahmood Saadeh, Osama