Jurnal Nasional Teknik Elektro最新文献_第5页

The Effect of Using Array Technique on Semi-Circular Patch Microstrip Antenna with 2.4 GHz Frequency in Supporting Wireless Body Area Network Technology 阵列技术对2.4GHz半圆形贴片微带天线支持无线体域网技术的影响

Jurnal Nasional Teknik Elektro Pub Date : 2022-11-30 DOI: 10.25077/jnte.v11n3.1075.2022

Baharuddin, Agung Bhaskara, A. Luthfi, Rina Angraini, Haniza Yazid

引用次数: 0

Analysis Duration of Potential Difference Neutralizer for Substation Grounding System 变电站接地系统电位差中和器的使用寿命分析

Jurnal Nasional Teknik Elektro Pub Date : 2022-11-30 DOI: 10.25077/jnte.v11n3.1027.2022

Riza Arif Pratama, Hermawan, Mochammad Facta

{"title":"Analysis Duration of Potential Difference Neutralizer for Substation Grounding System","authors":"Riza Arif Pratama, Hermawan, Mochammad Facta","doi":"10.25077/jnte.v11n3.1027.2022","DOIUrl":"https://doi.org/10.25077/jnte.v11n3.1027.2022","url":null,"abstract":"The grounding system design of the 150 kV substation have resolve affect in lightning strike area. The purpose of this study is to determine the duration of the potential difference penetration that occurs due to direct or indirect lightning strikes. The parameter method grounding system uses a combination of R and L for the grid section and a combination of RLC for the rod section. Simulations due to direct lightning strikes in nearby areas greatly affect the spike in the amount of potential difference. The potential difference in the area closest to the lightning strike with a maximum surge of 57.42 V with a neutralization duration of 0.21 μs. At the furthest distance from a lightning strike, the maximum potential difference spike is only 3.14 V with a neutralization duration of 2 μs. The average duration of neutralization due to lightning strikes is 2 μs. In the simulation of a direct lightning strike striking electrical equipment, it causes a very high potential difference spike in lightning strike area of 992.96 V with a spike duration of 0.012 μs. The farthest area point at the location of the lightning strike has a spike of 31.07 V with a spike duration of 0.06 μs. The duration of neutralization at a potential difference below 1 V, has a duration of more than 2 μs depending on the distance from the location of lightning strike. The grounding system design is able to perform good performance with a fast potential difference neutralization duration in the event of a direct or indirect lightning strike. Lightning strikes that occur will not cause dangerous step and touch voltages for personnel in the 150 kV substation area.","PeriodicalId":30660,"journal":{"name":"Jurnal Nasional Teknik Elektro","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47961565","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Distribution Transformer Synchronization Simulation with Two Different Vector Groups using the Matlab Simulink 基于Matlab Simulink的两种不同矢量组的配电变压器同步仿真

Jurnal Nasional Teknik Elektro Pub Date : 2022-11-30 DOI: 10.25077/jnte.v11n3.1041.2022

Brainvendra Widi Dionova, Taopik Hidayat, Sinka Wilyanti, M. N. Mohammed

{"title":"Distribution Transformer Synchronization Simulation with Two Different Vector Groups using the Matlab Simulink","authors":"Brainvendra Widi Dionova, Taopik Hidayat, Sinka Wilyanti, M. N. Mohammed","doi":"10.25077/jnte.v11n3.1041.2022","DOIUrl":"https://doi.org/10.25077/jnte.v11n3.1041.2022","url":null,"abstract":"Nowadays, the quality of electrical energy really needs to be improved especially for industrial purposes that require a good level of reliability in the distribution of electrical energy. Maintenance of distribution transformers is routinely carried out to ensure that the quality of electrical energy produced is in accordance with standards. This maintenance is done using the customer’s load from the distribution transformer to the mobile substation transformer, that can be done using synchronization. This synchronization requires the same distribution transformer vector groups, otherwise it will produce non-standard output. The aim of this research is to determine the vector groups effect on parallel transformer installation system, the method to overcome the synchronous problem of different vector groups based on simulating and testing the synchronization of a 20 / 0.4 kV distribution transformer with the Dyn5 and Dyn11 vector groups. The results obtained from this research are two transformers that have different vector groups can be synchronized with an abnormal connection (changing the position of the secondary terminal cable connection and the primary terminal cable) so that it will produce the same voltage phase. This will abnormal treatment of distribution transformers maintenance that do not have a back-up transformer with the same vector group still can use the different vector group transformers.","PeriodicalId":30660,"journal":{"name":"Jurnal Nasional Teknik Elektro","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43137449","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Intermittent Oscillation Diagnosis in a Control Loop Using Extreme Gradient Boosting 基于极值梯度增强的控制回路间歇振荡诊断

Jurnal Nasional Teknik Elektro Pub Date : 2022-11-30 DOI: 10.25077/jnte.v11n3.1040.2022

Dana Fatadilla Rabba, Awang N. I. Wardana, Nazrul Effendy

{"title":"Intermittent Oscillation Diagnosis in a Control Loop Using Extreme Gradient Boosting","authors":"Dana Fatadilla Rabba, Awang N. I. Wardana, Nazrul Effendy","doi":"10.25077/jnte.v11n3.1040.2022","DOIUrl":"https://doi.org/10.25077/jnte.v11n3.1040.2022","url":null,"abstract":"The control loop in the industry is a component that must be maintained because it will determine the plant's performance. Most industrial controllers experience oscillations with various causes, such as noise, oscillation, backlash, dead band, hysteresis, random variation, and poor controller tuning. The oscillation diagnosis system, which can understand the oscillation type characteristics, is built based on machine learning because it is dynamic and not based on specific rules. This study developed an online oscillation diagnosis program using the extreme gradient boosting (XGBoost) method. The data was obtained through the simulation of the Tennessee Eastman process. The data is segmented on specific window sizes, and then time series feature extraction is performed. The extraction results are then used to build an XGBoost model capable of performing oscillation diagnosis tasks. There are seven types of oscillations tested in this study. The model that has been made is implemented online with the help of sliding windows. The results show that the XGBoost model performs best when the data window size is 100, with the accuracy performance and the F1 score of the model in classifying the type of oscillation being 0.918 and 0.905, respectively. The model can detect the type of oscillation with an average diagnosis time of 712 seconds on diagnostic tests.","PeriodicalId":30660,"journal":{"name":"Jurnal Nasional Teknik Elektro","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44109530","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

A GWO-P&O Algorithm MPPT for PV Systems Under UIC and PSC UIC和PSC下光伏系统的GWO-P&O算法

Jurnal Nasional Teknik Elektro Pub Date : 2022-11-30 DOI: 10.25077/jnte.v11n3.1031.2022

Muyassar Muyassar, Tarmizi, Yuwaldy Away

引用次数: 0

Radio Frequency Based Wireless Battery Charging of Cellular Phones 基于射频的手机无线充电技术

Jurnal Nasional Teknik Elektro Pub Date : 2022-07-31 DOI: 10.25077/jnte.v11n2.978.2022

E. Normanyo, Philip Blewushie, Cyril Yao Atatsi

{"title":"Radio Frequency Based Wireless Battery Charging of Cellular Phones","authors":"E. Normanyo, Philip Blewushie, Cyril Yao Atatsi","doi":"10.25077/jnte.v11n2.978.2022","DOIUrl":"https://doi.org/10.25077/jnte.v11n2.978.2022","url":null,"abstract":"The challenge of regularly charging the battery of cellular phones has brought about new and more convenient ways to realising cellular battery charging. The wireless power platform has been explored for years bringing about many dimensions to its realisation. In this research, developed a wireless charging of Li-Ion battery of a cellular phone using commercial-off-the-shelf components vis-a-vis Radio Frequency (RF) energy. A MAX2623 voltage controlled oscillator was used to generate RF signals at a frequency of 915 MHz. Through a series of amplifier stages, the signal is radiated using a half-wave dipole antenna. The signal is received by a remote receiver module made up of 5 dBi gain half-wave dipole antenna which is impedance matched to a bridge rectifier made of SMS3929 Bridge Quad Schottky low turn-on voltage diodes. The rectified output is received by a EH4205 low voltage booster which amplifies the input into two paralleled MAX 682 charge pumps. The paralleled MAX 682 charge pump delivers a constant output voltage of 5 V DC and current of 500 mA. Within a 4 m radius the receiver module can receive enough power for the realisation of wireless battery charging. ","PeriodicalId":30660,"journal":{"name":"Jurnal Nasional Teknik Elektro","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42164707","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Design and Simulation of a Multistages Common-Emitter, Common-Collector, AC Voltage Amplifier 多级共发射极、共集电极、交流电压放大器的设计与仿真

Jurnal Nasional Teknik Elektro Pub Date : 2022-07-31 DOI: 10.25077/jnte.v11n2.1009.2022

Arief Wisnu Wardhana, Yogi Ramadhani, Priswanto Priswanto

{"title":"Design and Simulation of a Multistages Common-Emitter, Common-Collector, AC Voltage Amplifier","authors":"Arief Wisnu Wardhana, Yogi Ramadhani, Priswanto Priswanto","doi":"10.25077/jnte.v11n2.1009.2022","DOIUrl":"https://doi.org/10.25077/jnte.v11n2.1009.2022","url":null,"abstract":"The main function of the ampifier is to increase the signal strength, in terms of its voltage or current. In this research, a multistages ac voltage common-emitter amplifer and common-collector amplifier with a single supply of +15 V was designed. The objective is to design an amplifier for amplifying a small ac signal from a transducer. The transducer has an output impedance of 10 k. The amplifier will have a small-signal gain in order of about 1500 and a small-signal bandwith ranging from 100 Hz to 20 kHz. It will drive a load of 300 Ω. The entire circuit consists of a first stage common-emitter configuration gain amplifier, another second stage common-emitter configuration gain amplifier, and a third stage buffer unity gain common collector amplifier. The three-stages was capacitor coupled. The overall gain of the entire amplifier is the product of the first-stage gain, the second-stage gain, and the third-stage gain. A method called short-circuit time constants was used to determine the apropriate coupling and bypass capacitors. The overall circuit was then simulated by using NI Multisim. The magnitude of the overall gain of the circuit was obtained by performing an interactive analysis and simulation. The frequency response of the amplifier was obtained by performing an AC sweep analyses and simulation. It can be showed that the amplifier’s overall gain obtained from simulation is in agreement with the calculated results. The simulated result for the frequency responses were also in agreement with the requirement","PeriodicalId":30660,"journal":{"name":"Jurnal Nasional Teknik Elektro","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48798949","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Microstrip Rectangular Patch Array Antenna for Tsunami Radar 海啸雷达用微带矩形贴片阵列天线

Jurnal Nasional Teknik Elektro Pub Date : 2022-07-31 DOI: 10.25077/jnte.v11n2.1020.2022

Fitrilina Fitrilina, Junas Haidi, Alex Surapati, Hendy Santosa, Firdaus, R. Fernandez

{"title":"Microstrip Rectangular Patch Array Antenna for Tsunami Radar","authors":"Fitrilina Fitrilina, Junas Haidi, Alex Surapati, Hendy Santosa, Firdaus, R. Fernandez","doi":"10.25077/jnte.v11n2.1020.2022","DOIUrl":"https://doi.org/10.25077/jnte.v11n2.1020.2022","url":null,"abstract":"Radar tsunami merupakan salah satu alat deteksi yang digunakan pada system peringatan awal tsunami. Radar tsunami yang umum digunakan adalah radar High frekuensi yang memiliki jarak jangkauan jauh tetapi daya besar dan resolusi rendah. Untuk meningkatkan keandalan system peringatan tsunami dalam mendeteksi tanda-tanda tsunami dan monitoring dengan kecepatan update informasi yang tinggi, maka diperlukan system radar dengan resolusi yang tinggi. Resolusi yang tinggi dapat diperoleh jika radar memiliki bandwidth yang besar dalam spectrum radio. Peningkatan bandwidth dapat dilakukan dengan menaikan frekuensi kerja radar. Antena merupakan salah satu komponen penting yang dapat menentukan performa system radar. Oleh karena itu pada penelitian ini dirancangan antenna pada Super High Frequency untuk diaplikasikan pada system radar. Antena yang dirancang adalah antenna microstrip dengan patch rectangular. Spesifikasi yang diinginkan pada frekuensi 5,8 Ghz yaitu return loss≤-10 dB, VSWR≤2, bandwidth >150 Mhz, beamwidth>200. Setelah rancangan menggunakan simulasi memenuhi spesifikasi maka dilakukan pabrikasi dan pengukuran. Hasil pengukuran didapatkan pergeseran frekuensi menjadi 5,71 Ghz dengan return loss -21,346, VSWR 1,186, Bandwitdh 200 Mhz dan beamwidth 400 Oleh karena itu dapat dikatakan bahwa antenna yang dirancang dapat digunakan pada system radar tsunami","PeriodicalId":30660,"journal":{"name":"Jurnal Nasional Teknik Elektro","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49086114","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Analysis of Electronic Load Controller with Bidirectional Converter in Self-Excited Induction Generator 带双向变换器的自激感应发电机电子负载控制器分析

Jurnal Nasional Teknik Elektro Pub Date : 2022-07-31 DOI: 10.25077/jnte.v11n2.1003.2022

Andi Pawowoi, Wahyu Rizki Muslyadi, R. Nazir, F. Akbar

{"title":"Analysis of Electronic Load Controller with Bidirectional Converter in Self-Excited Induction Generator","authors":"Andi Pawowoi, Wahyu Rizki Muslyadi, R. Nazir, F. Akbar","doi":"10.25077/jnte.v11n2.1003.2022","DOIUrl":"https://doi.org/10.25077/jnte.v11n2.1003.2022","url":null,"abstract":"Induction generators are widely used in small-scale power plants driven by renewable energy, such as wind, mini/micro-hydro, tidal wave, biomass, biogas, etc. In applying this generator to a micro-hydropower plant, it is usually equipped with an ELC (Electronic Load Controller), which regulates the frequency to remain constant at a safe tolerance limit (49.8 – 50.2 Hz). However, this system is still not optimal because the ELC dumps its excess power into the dummy load. This paper proposes an ELC system that can adjust the frequency to remain constant without wasting excess power from the generator. This system uses the working principle of a bidirectional converter, which can regulate the flow of power from the generator and dummy load in two directions. In the proposed system, the dummy load uses a battery to store excess electrical energy and be utilized and reused when needed. Performance analysis of the proposed system uses simulation with MATLAB Simulink software. The induction generator used has a voltage specification of 380 Y, 50 Hz, 1420 rpm, 3.5 A, and 1.5 kW. The analysis results show that the developed ELC design can adjust the frequency in the value range of 49.98-50.01 Hz during load changes with a range of 955 Watt to 1.045 Watt, with the response time reaching its steady-state value of 0.1-0.4 seconds.","PeriodicalId":30660,"journal":{"name":"Jurnal Nasional Teknik Elektro","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44531266","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Automatic Maintenance Alert System for Heavy Duty Haulage Machines 重型运输机械自动维修报警系统

Jurnal Nasional Teknik Elektro Pub Date : 2022-07-31 DOI: 10.25077/jnte.v11n2.1002.2022

Prince Asiamah Addo, Lambert Dwomoh, Charles Ofori

{"title":"Automatic Maintenance Alert System for Heavy Duty Haulage Machines","authors":"Prince Asiamah Addo, Lambert Dwomoh, Charles Ofori","doi":"10.25077/jnte.v11n2.1002.2022","DOIUrl":"https://doi.org/10.25077/jnte.v11n2.1002.2022","url":null,"abstract":"The timely maintenance of haulage machines is important to prevent machine breakdown and reduce productivity down time. An unintended breakdown or machine stop due to inadequate maintenance causes huge financial loss to the company due to delivery delays. Excessive maintenance also increases production cost due to down time and workshop maintenance. Most haulage companies like Mantrac Ghana Limited have a maintenance schedule for their customers. However, most of these customers do not maintain these machines on time, largely due to forgetfulness or sheer disregard for the maintenance schedule. It is thus important to implement an automatic alert system to notify operators of this machinery when it is time for maintenance. This paper seeks to design an automatic alert system using ATmega328 microcontroller, SIM900 GSM module and alarm unit. A sensor connected to the engine of the haulage machine is used to monitor the condition and operational hours of the machine. The microcontroller is programmed using proteus software to receive instructions from the sensor and issue commands to activate both the GSM module and the buzzer simultaneously. The type and time of maintenance to be done is displayed on the LED display. A corresponding message is sent via the GSM module to both Mantrac Ghana Limited and the customer to undertake the type of maintenance. It can be concluded that an automatic alert system would improve strict adherence to maintenance schedule and help reduce machine.","PeriodicalId":30660,"journal":{"name":"Jurnal Nasional Teknik Elektro","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45470491","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1