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All Journal Jurnal Ilmiah Poli Rekayasa Elektron Jurnal Ilmiah JURNAL NASIONAL TEKNIK ELEKTRO Jurnal RESTI (Rekayasa Sistem dan Teknologi Informasi) Prosiding Seminar Nasional Sisfotek (Sistem Informasi dan Teknologi Informasi) Jurnal Andalas: Rekayasa dan Penerapan Teknologi
Zulka Hendri
Politeknik Negeri Padang
Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Engineering Health Professions Industrial & Manufacturing Engineering Other

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Perancangan Modifikasi Antena Kupu – Kupu Panjang Dual Frekuensi untuk Aplikasi Hypherthermia Kananda, Kiki; Andre, Hanalde; Timor, Agus Rahmad; ., Khairullah; ., Erliwati; Hendri, Zulka
JURNAL NASIONAL TEKNIK ELEKTRO Vol 4, No 2: September 2015
Publisher : Jurusan Teknik Elektro Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (609.508 KB) | DOI: 10.25077/jnte.v4n2.168.2015

Abstract

Therapy device of Electromagnetic Wave radiation  hypherthermia used clinically to heat tissue in the human body. Increased temperatures are not followed by tissue outside the body. The use of electromagnetic waves at frequencies 915 and 2450 MHz has been proven and widely used in hypherthermia. The design modifications butterfly antenna done by simulation using finite element method. The simulation results show the modification of antenna can work in both frequency hypherthermia. Optimal shape of the antenna produce 'return loss' (RL) -16.6295 dB at a frequency of 915 MHz and -18.2697 dB at frequency 2450 MHz.        Keywords : Hyperthermia, Dual Frequency, Antenna Application Abstrak—Radiasi gelombang elektromagnetik pada alat terapi hypherthermia digunakan secara klinis untuk memanaskan jaringan dalam tubuh manusia. Peningkatan temperatur tidak diikuti oleh jaringan luar tubuh. Penggunaan gelombang elektromagnetik pada frekuensi 915 dan 2450 MHz telah terbukti dan banyak digunakan dalam hypherthermia. Perancangan modifikasi antenna kupu – kupu panjang dilakukan dengan simulasi menggunakan metoda elemen hingga. Hasil simulasi menunjukan modifikasi antenna dapat bekerja pada kedua frekuensi hypherthermia. Bentuk optimal antena menghasilkan nilai return loss (RL) -16.6295dB pada frekuensi 915 MHz dan -18.2697dB pada frekuensi 2450 MHzKata Kunci : Hyperthermia, frekuensi ganda, Aplikasi Antena,
Karakteristik Preliminary Breakdown Petir Downward Leader Sebelum Sambaran Negatif Pertama Hendri, Zulka; Hazmi, Ariadi
JURNAL NASIONAL TEKNIK ELEKTRO Vol 3, No 1: Maret 2014
Publisher : Jurusan Teknik Elektro Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (766.218 KB) | DOI: 10.25077/jnte.v3n1.52.2014

Abstract

A hundred lightning flash was observed in Padang city, West Sumatera at January until Mei 2013. The lightning that use to analyze is proceeding with preliminary breakdown pulse (PBP) train and followed by first negative return stroke (RS).  Fast antenna capacitive was used to record electric field that produced of lightning flash. PBP-RS separation and pre-return stroke duration was used to analyze. Arithmetic and geometric mean of PPB-RS separation is 50,62ms and 31,73ms respectively. Arithmetic and geometric mean of pre-return stroke duration is 54,44ms and 33,92ms respectively. We have find two type of preliminary breakdown pulse train are; (1) the pulse train that dominant positive pulse at first half cycle (2) the pulse train that dominant negative pulse at first half cycle. The first type of pulse train have the PPB-RS separation and pre-return stroke duration that longer than the second type. The place that near with equator have PPB-RS separation and pre-return stroke duration that longer than the place far from equator (this conclusion we get from compare the result of our research with the result that produce from the other previous researchers).Keywords : lightning flash, preliminary breakdown, PPB-RS separation,  pre-return stroke duration.   Penelitian ini dilakukan  terhadap 100 kejadian petir di Kota Padang Sumatera Barat dari bulan Januari sampai Mei 2013. Petir yang dianalisis diawali oleh deretan pulsa preliminary breakdown (PPB) yang terjadi sebelum sambaran negatif pertama dari awan ke tanah. Sinyal petir di rekam dengan memanfaatkan antena medan listrik (fast antenna). Analisis yang dilakukan yaitu PPB-RS separation  dan pre-return stroke duration. Analisis PPB-RS separation  menghasilkan rata-rata aritmatik 50,62 ms dan rata-rata geometriknya 31,73 ms. Analisis pre-return stroke duration menghasilkan rata-rata aritmatik 54,44 ms dan rata-rata geometriknya 33,92 ms. Dua tipe deretan pulsa PB yang ditemukan dalam penelitian ini yaitu; (1) deretan pulsa yang didominasi oleh pulsa-pulsa dengan polaritas positif pada setengah siklus pertama, (2) deretan pulsa yang didominasi oleh pulsa-pulsa dengan polaritas negatif pada setengah siklus pertamanya. Deretan pulsa dengan tipe pertama memiliki PPB-RS separation dan pre-return stroke duration yang lebih lama dibandingkan deretan pulsa dengan tipe ke dua. Daerah yang dekat dengan khatulistiwa cenderung memiliki PPB-RS separation dan pre-return stroke duration yang lebih lama dibandingkan daerah yang jauh dari khatulistiwa. Kesimpulan ini diperoleh dengan membandingkan data hasil penelitian ini dengan hasil penelitian yang dilakukan oleh peneliti sebelumnya di beberapa daerah berbeda.Kata Kunci : petir, preliminary breakdown, PPB-RS separation,  pre-return stroke duration.    
Karakteristik Preliminary Breakdown Petir Downward Leader Sebelum Sambaran Negatif Pertama Zulka Hendri; Ariadi Hazmi
JURNAL NASIONAL TEKNIK ELEKTRO Vol 3 No 1: Maret 2014
Publisher : Jurusan Teknik Elektro Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (766.218 KB) | DOI: 10.25077/jnte.v3n1.52.2014

Abstract

A hundred lightning flash was observed in Padang city, West Sumatera at January until Mei 2013. The lightning that use to analyze is proceeding with preliminary breakdown pulse (PBP) train and followed by first negative return stroke (RS).  Fast antenna capacitive was used to record electric field that produced of lightning flash. PBP-RS separation and pre-return stroke duration was used to analyze. Arithmetic and geometric mean of PPB-RS separation is 50,62ms and 31,73ms respectively. Arithmetic and geometric mean of pre-return stroke duration is 54,44ms and 33,92ms respectively. We have find two type of preliminary breakdown pulse train are; (1) the pulse train that dominant positive pulse at first half cycle (2) the pulse train that dominant negative pulse at first half cycle. The first type of pulse train have the PPB-RS separation and pre-return stroke duration that longer than the second type. The place that near with equator have PPB-RS separation and pre-return stroke duration that longer than the place far from equator (this conclusion we get from compare the result of our research with the result that produce from the other previous researchers).Keywords : lightning flash, preliminary breakdown, PPB-RS separation,  pre-return stroke duration.   Penelitian ini dilakukan  terhadap 100 kejadian petir di Kota Padang Sumatera Barat dari bulan Januari sampai Mei 2013. Petir yang dianalisis diawali oleh deretan pulsa preliminary breakdown (PPB) yang terjadi sebelum sambaran negatif pertama dari awan ke tanah. Sinyal petir di rekam dengan memanfaatkan antena medan listrik (fast antenna). Analisis yang dilakukan yaitu PPB-RS separation  dan pre-return stroke duration. Analisis PPB-RS separation  menghasilkan rata-rata aritmatik 50,62 ms dan rata-rata geometriknya 31,73 ms. Analisis pre-return stroke duration menghasilkan rata-rata aritmatik 54,44 ms dan rata-rata geometriknya 33,92 ms. Dua tipe deretan pulsa PB yang ditemukan dalam penelitian ini yaitu; (1) deretan pulsa yang didominasi oleh pulsa-pulsa dengan polaritas positif pada setengah siklus pertama, (2) deretan pulsa yang didominasi oleh pulsa-pulsa dengan polaritas negatif pada setengah siklus pertamanya. Deretan pulsa dengan tipe pertama memiliki PPB-RS separation dan pre-return stroke duration yang lebih lama dibandingkan deretan pulsa dengan tipe ke dua. Daerah yang dekat dengan khatulistiwa cenderung memiliki PPB-RS separation dan pre-return stroke duration yang lebih lama dibandingkan daerah yang jauh dari khatulistiwa. Kesimpulan ini diperoleh dengan membandingkan data hasil penelitian ini dengan hasil penelitian yang dilakukan oleh peneliti sebelumnya di beberapa daerah berbeda.Kata Kunci : petir, preliminary breakdown, PPB-RS separation,  pre-return stroke duration.    
Perancangan Modifikasi Antena Kupu – Kupu Panjang Dual Frekuensi untuk Aplikasi Hypherthermia Kiki Kananda; Hanalde Andre; Agus Rahmad Timor; Khairullah .; Erliwati .; Zulka Hendri
JURNAL NASIONAL TEKNIK ELEKTRO Vol 4 No 2: September 2015
Publisher : Jurusan Teknik Elektro Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (609.508 KB) | DOI: 10.25077/jnte.v4n2.168.2015

Abstract

Therapy device of Electromagnetic Wave radiation  hypherthermia used clinically to heat tissue in the human body. Increased temperatures are not followed by tissue outside the body. The use of electromagnetic waves at frequencies 915 and 2450 MHz has been proven and widely used in hypherthermia. The design modifications butterfly antenna done by simulation using finite element method. The simulation results show the modification of antenna can work in both frequency hypherthermia. Optimal shape of the antenna produce 'return loss' (RL) -16.6295 dB at a frequency of 915 MHz and -18.2697 dB at frequency 2450 MHz.        Keywords : Hyperthermia, Dual Frequency, Antenna Application Abstrak—Radiasi gelombang elektromagnetik pada alat terapi hypherthermia digunakan secara klinis untuk memanaskan jaringan dalam tubuh manusia. Peningkatan temperatur tidak diikuti oleh jaringan luar tubuh. Penggunaan gelombang elektromagnetik pada frekuensi 915 dan 2450 MHz telah terbukti dan banyak digunakan dalam hypherthermia. Perancangan modifikasi antenna kupu – kupu panjang dilakukan dengan simulasi menggunakan metoda elemen hingga. Hasil simulasi menunjukan modifikasi antenna dapat bekerja pada kedua frekuensi hypherthermia. Bentuk optimal antena menghasilkan nilai return loss (RL) -16.6295dB pada frekuensi 915 MHz dan -18.2697dB pada frekuensi 2450 MHzKata Kunci : Hyperthermia, frekuensi ganda, Aplikasi Antena,
The Generating Super Resolution of Thermal Image based on Deep Learning Ismail Ismail; Yefriadi Y; Yuhefizar Y; Fibriyanti; Zulka Hendri
Jurnal RESTI (Rekayasa Sistem dan Teknologi Informasi) Vol 6 No 2 (2022): April 2022
Publisher : Ikatan Ahli Informatika Indonesia (IAII)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (392.82 KB) | DOI: 10.29207/resti.v6i2.3934

Abstract

The need for a high resolution to the thermal image is urgent and essential. The high resolution of the thermal image can give accurate information on the heat distribution map of the objects. The accurate heat distribution maps can give accurate temperature information. This accurate temperature measurement is used for measuring many objects such as electric motors, engines, the human body, and so on—this information is used to detect the anomalies of the object to find the damaged parts. The anomalies are considered damaged parts found in solar panels, agricultural fields, buildings, bridges, etc. As the super-resolution of thermal images is very important, generating them is compulsory. The camera for obtaining super-resolution thermal images is rare, not available in the common market. Furthermore, this kind of device is costly too. Therefore not all the users, such as farmers or technicians, can have them. In order to handle the problem, the proposed method has the purpose of generating super-resolution thermal images economically and is more accessible through the deep learning method. The dataset is taken from the solar panel. The results show that the proposed method can handle the low-resolution problem of thermal images.
Pembuatan dan Pelatihan Tata Kelola Website Nagari Untuk Promosi Digital Yuhefizar; Ikhsan Yusda Prima Putra; Yenida; Lilimiwirdi; Novadilastri; Witri Handayani; Variyetmi Wira; Hidra Amnur; Zulka Hendri; Deddy Prayama
Prosiding SISFOTEK Vol 5 No 1 (2021): SISFOTEK V 2021
Publisher : Ikatan Ahli Informatika Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (960.314 KB)

Abstract

The existence of a website in the current digitalization era has become a mandatory requirement for every Nagari (Village), as a promotional medium and an effort to digitize all business processes in the Nagari. For this reason, in this service activity an official village website was created and given website management training to village staff for digital promotion purposes. The website is equipped with menus that explain in detail the profile, potential, and facilities of the Nagari. Based on the results of a survey conducted after the training activities, it was concluded that an increase in the understanding of Nagari staff in managing the website was achieved by 90%, so that by utilizing the website media there was an increase in efficiency and effectiveness in digitally disseminating Nagari information to the wider community. This has a positive impact on the performance of the nagari government.
Peramalan Beban Listrik Kabupaten Pesisir Selatan Dengan Analisis Regresi Zulka Hendri; Efendi Efendi; Junaidi Asrul; Fitriadi Fitriadi
Elektron : Jurnal Ilmiah Volume 15 Nomor 1 Tahun 2023
Publisher : Teknik Elektro Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/eji.15.1.340

Abstract

The more electric vehicles emerge, the more electricity demand will increase in each region. This will encourage electricity providers to increase the number or capacity of generators. The construction of a new power plant requires load forecasting to determine how much capacity the plant will build. This study aims to predict the electrical load in Pesisir Selatan, West Sumatra until 2031 using linear regression analysis and time series. Forecasting is done on each sector of PLN customers. Forecasting is done based on the PLN customer sector. The forecasting sectors are the household, business, social and government sectors. The four test criteria were carried out are namely the coefficient of determination test (R2), the F test, the T test and the mean absolute percentage error (MAPE). The forecasting results show that in 2031 the electricity load for the household sector is 120.1 MW, the business sector is 5.7 MW, the social sector is 56.9 MW and the government is 9.5 MW.
Planning Penerangan Jalan Umum (PJU) Mushalla Al-Barkah Lambung Bukit Kec. Pauh Kota Padang Yona Mayura; Zulka Hendri; Akbar Abadi; Aldi Rahman; Fibriyanti Fibriyanti; Zas Ressy Aidha
Jurnal Andalas: Rekayasa dan Penerapan Teknologi Vol. 3 No. 1 (2023): Juni 2023
Publisher : Jurusan Teknik Elektro, Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jarpet.v3i1.41

Abstract

Penerangan jalan akan lebih bermanfaat apabila ditempatkan pada area jalan menuju tempat-tempat ibadah seperti, masjid, mushola, gereja, pura, vihara, klenteng, dan tempat-tempat ibadah lainnya. Sebab dengan adanya penerangan jalan menuju tempat ibadah akan mempermudah akses umat beragama untuk melaksanakan ibadah di tempat ibadahnya, misalnya saja umat beragama islam yang selalu melaksanakan ibadah sholat lima waktu sehari semalam secara berjamaah di masjid atau di mushola. Terutama pada malam hari penerangan jalan sangat bermanfaat bagi masyarakat di sekitar masjid atau mushola yang terletak di kawasan yang belum terdapat PJU dari pemerintah setempat, seperti pada kasus mushalla Al-barkah Lambung Bukit kecamatan Pauh kota Padang. Mushalla Al-barkah Lambung Bukit kecamatan Pauh kota Padang merupakan salah satu tempat ibadah umat muslim  yang terletak di kawasan yang belum terdapat penerangan jalan dari pemerintah setempat, karena mushola ini dalam kondisi baru dibangun di bagian sisi sebelah jalan. oleh sebab itu, dosen prodi D3 Teknik Listrik PNP berinisiatif untuk melakukan planning PJU pada mushalla Al-barkah yang berpedoman pada SNI 7391:2008. Berdasarkan perhitungan sesuai dengan SNI 7391:2008, maka diperoleh sebanyak 47 titik lampu PJU yang akan dipasang disekitar jalan mushalla Al-Barkah. Namun untuk penerangan jalan sementara mushalla Al-Barkah, maka dipasang lampu sebanyak 6 buah di teras mushalla.
Karakteristik Deretan Pulsa Preliminary Breakdown Yang Diikuti Sambaran Negatif di Padang Zulka Hendri; Ariadi Hazmi
Jurnal Andalas: Rekayasa dan Penerapan Teknologi Vol. 1 No. 1 (2021): Juni 2021
Publisher : Jurusan Teknik Elektro, Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jarpet.v1i1.45

Abstract

Penelitian ini ditujukan untuk mendapatkan karakteristik deretan pulsa preliminary breakdown yang diikuti sambaran negatif di Kota Padang. BIL model digunakan untuk mengidentifikasi perubahan medan listrik di awan sebelum terjadi sabaran petir negatif pertama. Penelitian ini dilakukan pada musim penghujan di Kota Padang Sumatera Barat dengan memanfaatkan antenna medan listrik. Deretan pulsa PB dipelajari dengan memanfaatkan 100 kali sambaran petir yang berjarak kurang dari 50 km dari stasiun penerima. Analisis yang dilakukan adalah individual pulse duration dan interpulse interval. Rata-rata aritmatik adalah individual pulse duration 10,02µs dan rata-rata geometriknya 6,77µs dengan rentang data dari 0,55 – 68,83µs. Rata-rata aritmatik interpulse interval 138,43µs rata-rata geometrik 94,94µs dengan retang data dari 22,064 – 627,73 µs. Deretan pulsa tipe pertama memiliki individual pulse duration pada setengah siklus pertama yang lebih pendek dibandingkan pada setengah siklus kedua, sedangkan deretan pulsa tipe kedua memiliki individual pulse duration yang hampir sama antara setengah siklus pertama dan setengah siklus kedua. Deretan pulsa tipe pertama miliki individual pulse duration dan interpulse interval yang lebih lama dibandingkan deretan pulsa tipe kedua.
Reduksi Harmonisa Pada Saluran Distribusi Tenaga Listrik Dengan Filter Daya Aktif Fitriadi .; M. Imran Hamid; Herisanjani Herisanjani; Firmansyah Firmansyah; Zulka Hendri
Elektron : Jurnal Ilmiah Volume 15 Nomor 1 Tahun 2023
Publisher : Teknik Elektro Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/eji.15.1.350

Abstract

The large use of power converters in distribution lines causes poor power quality such as high produces harmonics in an electric power system that arises due to the operation of non-linear electrical equipment. The presence of harmonics in the power system distribution results in a very large loss in the system. In this paper had been done a simulation of power quality improvement through harmonic reduction using parallel active power filter. Active power filters work with control techniques based on the concept of instantaneous power to determine the amount of compensation currents that must be generated by the power compensator power circuit. The compensating current references generated by the control circuit are used by the hysteresis type controller to provide harmonic compensation arising. From the result of simulation using Simulink MATLAB, the harmonic value (THD) decrease caused by the 3 phase rectifier load on a distribution network which is used as case example. The harmonic value before compensated on the network is 27.85% at each phase, while after computing the harmonic value of the network decreases to 1,43% in R phase, 1,49% in S phase, and 1,34% in T phase.
Co-Authors ., Erliwati ., Khairullah Agus Rahmad Timor Akbar Abadi Aldi Rahman Ariadi Hazmi Asrul, Junaidi Dinda Desti Putri Efendi Efendi Erliwati . Fibriyanti Fibriyanti Fibriyanti Firmansyah - Firmansyah - - Fitriadi . Fitriadi fitriadi Hanalde Andre Herisanjani Herisanjani Hidra Amnur Ikhsan Yusda Prima Putra Ismail Ismail Kananda, Kiki Khairullah . Kiki Kananda Lilimiwirdi Lilimiwirdi M. Imran Hamid Novadilastri Timor, Agus Rahmad Variyetmi Wira Witri Handayani Yefriadi Yefriadi Yenida Yenida Yona Mayura Yuhefizar Yuhefizar Zas Ressy Aidha