Ayob Nazmy Nanyan
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Preferred name
Ayob Nazmy Nanyan
Official Name
Ayob Nazmy, Nanyan
Alternative Name
Nanyan, Ayob Nazmy
Nanyan, Ayob Nazmi Bin
Nanyan, A. N.
Main Affiliation
Scopus Author ID
57201667197
Researcher ID
FNW-5877-2022

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A review of analysis of partial discharge measurements using coupling capacitor in rotating machine

2025-06 , Mohamad Nur Khairul Hafizi Rohani , Afifah Shuhada Rosmi , Ayob Nazmy Nanyan , Ahmad Syukri Abd Rahman , Nur Dini Athirah Gazata , Aiman Ismail Mohamed Jamil , Mohd Helmy Halim Abdul Majid , Normiza Masturina Samsuddin

Partial discharge (PD) is a critical phenomenon in electrical systems, particularly in high-voltage (HV) equipment like transformers, cables, switchgear, and rotating machines. In rotating machines such as generators and motors, PD is a significant concern as it leads to insulation degradation, potentially resulting in catastrophic failure. Effective and reliable diagnostic techniques are essential for detecting and analyzing PD to ensure the operational safety and longevity of such equipment. Various PD detection methods have been developed, including coupling capacitor (CC), high-frequency current transformer (HFCT), and ultra-high frequency (UHF) techniques, each offering unique advantages in assessing the condition of HV electrical systems. Among these, coupling capacitors have gained significant attention due to their ability to improve the accuracy, sensitivity, and efficiency of PD detection in rotating machines. This study focuses on the advancements in coupling capacitor-based techniques and their critical role in enhancing PD diagnostics for monitoring and maintaining high-voltage rotating machinery.

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Publication

Partial discharge detection performance using multi-cylindrical slots antenna with parasitic suppression patch for power transforme

2022-01-01 , Bohari Z.H. , Muzamir Isa , Ahmad Zaidi Abdullah , Soh P.J. , Ayob Nazmy Nanyan , Sulaima M.F.

This paper focused on analyzing multi-cylindrical slots performance combining with parasitic suppression patch for partial discharge detection. Both proposed slots antenna and conventional monopole are simulated using CST Microwave Studio software before being fabricated and tested with real partial discharge signal. Performance comparison will be focused on scattering parameter, radiation pattern and surface current distribution. Both antennas are subjected to a partial discharge signal from lab scaled power transformer for the field test. Based on the result, the proposed performed better in both simulation and field testing with the dual-frequency operation, with better gain improvement by 14%. For the field test, the proposed antenna generated better detection result with reduced noises by 50%.

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