The Experts below are selected from a list of 2553 Experts worldwide ranked by ideXlab platform

Hazlee Azil Illias - One of the best experts on this subject based on the ideXlab platform.

  • Analysis of discharge energy on surge Arrester configurations in 132 kV double circuit transmission lines
    Measurement, 2019
    Co-Authors: Nor Hidayah Nor Hassan, Hazlie Mokhlis, Syahirah Abd Halim, Halim Abu Bakar, Hazlee Azil Illias, Vladimir Terzija
    Abstract:

    Abstract Surge Arrester has been proven to be the most effective application to provide optimum lightning protection for the transmission line. Thus, many works on optimizing lightning protection for transmission line have been conducted since the past. However, works on minimizing double circuit outages and surge Arrester physical properties during transient overvoltages are less likely to be found. Therefore, in this work, several surge Arrester configurations installed on a 132 kV double circuit transmission line were modelled using EMTP-RV to investigate their capability to withstand current and energy discharged by lightning strokes during back flashover phenomena. These configurations were then compared to determine the most effective protection design based on the actual tripping pattern recorded by the lightning detection system (LDS) in Malaysia. The selection was made by considering Arresters’ discharge energy due to variation in tower footing resistance, current magnitude, power frequency voltage, lightning tail time and front time, number of towers and span length. It was found that double circuit transmission line tripping can be completely eliminated by installing surge Arresters at each phase conductor of one circuit. The selected Arresters configuration provides sufficient lightning protection to the transmission line and complies with the discharge energy capability requirement specified by the utility company in Malaysia, of 5.1 kJ/kV for maximum continuous operating voltage (MCOV).

  • measurement and modelling of leakage current behaviour in zno surge Arresters under various applied voltage amplitudes and pollution conditions
    Energies, 2018
    Co-Authors: Nurul Ain Abdul Latiff, Ab Halim Abu Bakar, Hazlee Azil Illias, Sameh Ziad Ahmad Dabbak
    Abstract:

    In zinc oxide (ZnO) surge Arresters, leakage current usually flows across the Arrester under normal operating condition. Leakage current is one of the factors which contribute towards degradation of surge Arresters and therefore, it is very important to monitor the condition of surge Arrester. In this work, the behaviour of leakage current in a ZnO surge Arrester during normal operation, under different voltage amplitudes, wetness and pollution conditions was analysed. An 11 kV surge Arrester model in three-dimensional space was subjected to finite element analysis (FEA) to determine the leakage current under different conditions. The results from the FEA model were compared with the measurement results to validate the model that has been developed. From comparison between the measurement and simulation results, physical parameters of a surge Arrester that influence the leakage current under different conditions of the surge Arrester were identified from the model. Through this work, a better understanding of leakage current behaviour can be attained, which may help in condition monitoring analysis on surge Arrester in electrical utilities.

Prasetyo M. T. - One of the best experts on this subject based on the ideXlab platform.

  • Evaluasi Perlindungan Gardu Induk 150 Kv Pandean Lamper Di Trafo III 60 Mva Terhadap Gangguan Surja Petir
    Muhammadiyah University Semarang, 2012
    Co-Authors: Wibowo I. E., Assaffa L., Prasetyo M. T.
    Abstract:

    One of the main causes of damage to existing equipment in the substation was struck bylightning attack that cause the conductor wave and make over voltage and flames leap peak voltage exceeds BIL. The aim of this study was to calculate and analyze the level of protection, against power transformer Arrester, the safe distance between Arrester and transformer power to get a good protection against harmful lightning surges, comparing both Arresters installed. To solve the problems of interference caused by lightning surge lightning Arrester is installed as close as possible to put on the transformer clamps to protect electrical equipment. The results of calculations for a distance of 6 m, 4 MBA type 2 Arrester capable of with standing the wavefront steepness of 500 kV / μs, while type exlim P 700 kV / μs. The greater the Arrester capable of withstanding surge wavefront tilting the better the equipment in substations are protected. The evaluation shows that the distance between Arrester and transformer installed in the 150 kV substation Pandean Lamper less than the maximum to protect electrical equipment, especially power transformers

Prasetyo M. Toni - One of the best experts on this subject based on the ideXlab platform.

  • EVALUASI PERLINDUNGAN GARDU INDUK 150 KV PANDEAN LAMPER DI TRAFO III 60 MVA TERHADAP GANGGUAN SURJA PETIR
    'LPPM Universitas Muhammadiyah Semarang', 2013
    Co-Authors: Wibowo, Ihwa Ernanto, Assaffa Luqma, Prasetyo M. Toni
    Abstract:

    One of the main causes of damage to existing equipment in the substation was struck bylightning attack that cause the conductor wave and make over voltage and flames leap peak voltage exceeds BIL. The aim of this study was to calculate and analyze the level of protection, against power transformer Arrester, the safe distance between Arrester and transformer power to get a good protection against harmful lightning surges, comparing both Arresters installed. To solve the problems of interference caused by lightning surge lightning Arrester is installed as close as possible to put on the transformer clamps to protect electrical equipment. The results of calculations for a distance of 6 m, 4 MBA type 2 Arrester capable of with standing the wavefront steepness of 500 kV / μs, while type exlim P 700 kV / μs. The greater the Arrester capable of withstanding surge wavefront tilting the better the equipment in substations are protected. The evaluation shows that the distance between Arrester and transformer installed in the 150 kV substation Pandean Lamper less than the maximum to protect electrical equipment, especially power transformers.Key words : lightning attack, Arrester distance, level of protection

Jauhari 1021722015) - One of the best experts on this subject based on the ideXlab platform.

  • Analisis pengaruh induksi petir terhadap sistem pengaman komunikasi data automatic message switching center di Perum LPPNPI Pangkalpinang
    2019
    Co-Authors: Jauhari 1021722015)
    Abstract:

    Salah satu yang menjadi permasalahan teknik di PERUM LPPNPI Cabang Pangkalpinang atau yang biasa disebut AirNav Indonesia Cabang Pangkalpinang adalah sering rusaknya converter RS232-RS485 ketika terjadinya petir disekitar bandara Depati Amir, meskipun lightning Arrester telah dipasang. Hal ini disebabkan oleh jalur kabel komunikasi data yang melintasi area landasan di bandara tersebut sepanjang 800 meter dan berada di area yang terbuka.Setelah dilakukan analisis, maka didapatkan bahwa petir yang menyebabkan kerusakan pada converter RS232-RS485 adalah petir induksi yang diperkirakan mengenai saluran kabel tegangan menengah 20 kV yang digandengkan bersamaan dengan kabel komunikasi data pada PERUM LPPNPI Cabang Pangkalpinang.Lightning Arrester tidak bekerja disebabkan oleh tingkat breakdown voltage pada lightning areester tersebut hanya senilai 4 kV, sedangkan petir di pulau Bangka sendiri masih tergolong cukup besar jika dibandingkan dengan breakdown voltage lightning Arrester yang hanya senilai 4 kV saja

Sunanda Wahri - One of the best experts on this subject based on the ideXlab platform.

  • ANALISIS PENGARUH INDUKSI PETIR PADA KOMUNIKASI DATA AUTOMATIC MESSAGE SWITCHING CENTER DI PERUM LPPNPI PANGKALPINANG
    'Universitas Bangka Belitung', 2019
    Co-Authors: Jauhari Jauhari, Arkan Fardhan, Sunanda Wahri
    Abstract:

    Salah satu yang menjadi permasalahan teknik di PERUM LPPNPI Cabang Pangkalpinang atau yang biasa disebut AirNav Indonesia Cabang Pangkalpinang adalah sering rusaknya converter RS232-RS485 ketika terjadinya petir disekitar bandara Depati Amir, meskipun lightning Arrester telah dipasang. Hal ini disebabkan oleh jalur kabel komunikasi data yang melintasi area landasan di bandara tersebut sepanjang 800 meter dan berada di area yang terbuka.Setelah dilakukan analisis, maka didapatkan bahwa petir yang menyebabkan kerusakan pada converter RS232-RS485 adalah petir induksi yang diperkirakan mengenai saluran kabel tegangan menengah 20 kV yang digandengkan bersamaan dengan kabel komunikasi data pada PERUM LPPNPI Cabang Pangkalpinang.Lightning Arrester tidak bekerja disebabkan oleh tingkat breakdown voltage pada lightning areester tersebut hanya senilai 4 kV, sedangkan petir di pulau Bangka sendiri masih tergolong cukup besar jika dibandingkan dengan breakdown voltage lightning Arrester yang hanya senilai 4 kV.Salah satu yang menjadi permasalahan teknik di PERUM LPPNPI Cabang Pangkalpinang atau yang biasa disebut AirNav Indonesia Cabang Pangkalpinang adalah sering rusaknya converter RS232-RS485 ketika terjadinya petir disekitar bandara Depati Amir, meskipun lightning Arrester telah dipasang. Hal ini disebabkan oleh jalur kabel komunikasi data yang melintasi area landasan di bandara tersebut sepanjang 800 meter dan berada di area yang terbuka.Setelah dilakukan analisis, maka didapatkan bahwa petir yang menyebabkan kerusakan pada converter RS232-RS485 adalah petir induksi yang diperkirakan mengenai saluran kabel tegangan menengah 20 kV yang digandengkan bersamaan dengan kabel komunikasi data pada PERUM LPPNPI Cabang Pangkalpinang.Lightning Arrester tidak bekerja disebabkan oleh tingkat breakdown voltage pada lightning areester tersebut hanya senilai 4 kV, sedangkan petir di pulau Bangka sendiri masih tergolong cukup besar jika dibandingkan dengan breakdown voltage lightning Arrester yang hanya senilai 4 kV