Journal Information
ISSN / EISSN : 2302-2949 / 2407-7267
Published by: Universitas Andalas (10.25077)
Total articles ≅ 350
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Fikri Nizar Gustiyana, Muntaqo Alfin Amanaf, Danny Kurnianto
JURNAL NASIONAL TEKNIK ELEKTRO, Volume 10; https://doi.org/10.25077/jnte.v10n2.781.2021

Indonesia is an agricultural country with a wealth of natural resources. The agricultural sector is one of the natural resources with great potential. The processing and monitoring of very large agricultural land is currently a problem that must be resolved as soon as possible. The use of a remote monitoring system is the solution to this problem. The LoRa protocol is one of the communication protocols that can be used on large farms. This communication system is part of the low-power wide-area network communication system. The LoRaWAN communication system was implemented on agricultural soil moisture monitoring devices in this study. Based on the findings, it is possible to conclude that the propagation used at the time of transmission influences the success rate of data transmission via LoRaWAN communication. Line of Sight (LOS) propagation has a higher success rate than Non Line of Sight (NLOS) propagation. The LOS value is 17% greater than the NLOS at a distance of 100 meters. The LOS value is 24% greater than the NLOS at a distance of 150 meters. The LOS value is 3% greater than the NLOS value at a distance of 200 meters. LOS propagation measurement throughput is higher than NLOS propagation measurement throughputKeywords: LoRa, LoRaWAN, Wireless, Internet Of Things
Mochamad Irwan Nari, Zainul Mustain, Syamsiar Kautsar, Satryo Budi Utomo
JURNAL NASIONAL TEKNIK ELEKTRO, Volume 10; https://doi.org/10.25077/jnte.v10n2.904.2021

The difficulty with parallel parking, especially when going backwards is when adjusting the steering wheel so that the car can park in the right direction. Based on these problems, this study aims to design an automatic parking system. To improve parking success, a trajectory tracking system with fuzzy logic control will be implemented on a 1/7.5 scale test car. The coordinates obtained from the bicycle kinematic model are compared with the design trajectory. The difference between the facing direction read by the gyroscope sensor and the trajectory design is processed using a fuzzy logic controller to direct the servo motor as the steering wheel. The test results obtained that the error value for the position and direction facing in the automatic parking test using fuzzy logic control is 1.25cm and 1.59°.Keywords: Trajectory tracking, gyroscope, fuzzy logic control, parallel parking
Elvira Sukma Wahyuni, Zulfika Iqbal, Dzata Farahiya
JURNAL NASIONAL TEKNIK ELEKTRO, Volume 10; https://doi.org/10.25077/jnte.v10n2.924.2021

The active movement of children poses a safety risk in the absence of adult supervision. To reduce the risk of accidents in children, an automatic detection system for the direction of children's movements is crucially needed. In this study, detection of the direction of human movement based on image processing was carried out with the input of videos produce from 4 CCTV installed in each corner of the room. The system will detect the direction of object movement with classification of orientation, namely front, back, right and left. The detection method used in this research is Optical Flow. Optical Flow will calculate the value of the direction or orientation of the movement of an object. The orientation obtained is then accumulated with HOOF (Histogram Orientation of Optical Flow), where HOOF will collect the orientation of objects on the whole frame according to a 8-part Cartesian angle. The results of the orientation with Optical Flow will be compared with the direction of detection measured manually to determine whether the detection of movement direction using Optical Flow is running well. According to the results, it is known that the Optical Flow method has succeeded in detecting the direction of movement accurately based on different camera angles.Keywords : Image Processing, CCTV, Optical Flow, HOOF
Hendi Matalata, Fadli Eka Yandra
JURNAL NASIONAL TEKNIK ELEKTRO, Volume 10; https://doi.org/10.25077/jnte.v10n2.831.2021

Multilevel Inverter (MLI) is a converter that converts DC power source into AC power source with voltage output more than 2 levels. The conventional 5-level Multilevel Inverter Topology that is developing today generally uses eight power switch components. In this paper, research Topology multilevel inverter 5 levels was conducted by reducing the power switch components into four pieces and assisted by two diode clamps and capacitor as voltage coupling. PWM (Pulse Width Modulation) technique used to utilize multicarrier modulation. Simulation testing with MATLAB conducted has been verified with the results of hardware tests where the output voltage shows similarity of shape at the output voltage MLI 5 levels. The results and discussion of the proposed topology can provide economic benefits from the use of the number of power switch components (MOSFET) compared to conventional 5-level MLI topology.Keywords : Multilevel Inverter, PWM, 5 Level
Pawenary Pawenary, Septianissa Azzahra, Hastuti Azis, Anton Satria Prabuwono
JURNAL NASIONAL TEKNIK ELEKTRO, Volume 10; https://doi.org/10.25077/jnte.v10n2.906.2021

In this study, an electric vehicle was designed using fossil fuels compared to the hybrid system on a 150cc motorcycle. The design of electric motorcycle vehicles is focused to know the feasibility study comparison between engine drive and electrical drive. In the design of electric motorcycle vehicles know how to make technical economic calculations on electric motorcycles. And converting energy from mechanical energy into electric energy or vice versa requires a device called an electric motor. Having the knowledge and experience in the manufacture of electric motors will be more useful and become important in the future. Electric vehicles are the solution to the problem of depleting petroleum reserves and pollution problems that increase each year due to exhaust emissions produced by oil-fueled vehicles. contribution of motor vehicle exhaust as a source of air pollutionreaches 60-70%. The decline of fossil fuels in the world is also a major problem that is currently unresolved. The analytical technique used in this study is a descriptive statistic technique. Where in this study will be carried out an assessment of the technical data that occurs on the calculation of the speed of what motor is in accordance with the specified standards.
Ediwan Ediwan, Muliadi Muliadi, Mahalla Mahalla, Nazaruddin Nazaruddin, Andi Mulkan
JURNAL NASIONAL TEKNIK ELEKTRO, Volume 10; https://doi.org/10.25077/jnte.v10n2.888.2021

Switching substations are usually supplied from one express feeder which can cause a low level of reliability due to disruption or outage on the express feeder. Also, the lack of power supply at the ends of the network causes voltage drops. One way to solve this problem is to reconfigure the network. In this study, testing was carried out on a distribution system in the Nagan Raya Regency, namely the distribution system of PT. PLN (Persero) ULP Jeuram originally had a radial system. Furthermore, the distribution system was reconfigured with the Krueng Isep hydroelectric power plant which was included in the PLN ULP Jeuram grid so that the system that was originally radial became a loop configuration. The method used in analyzing the network reconfiguration process is to use the ETAP 12.6 application. As a result, after reconfiguring the network the voltage increased from 19.2 kV to 20.7 kV, the highest increase was at the Beutong Substation which reached 1.5 kV and decreased power losses in the network with a total of 188.2 kW and 263.1 kVAR. Furthermore, before the network reconfiguration, ULP Jeuram SAIFI value was 22.25 times/customers and SAIDI values 1337.74 minutes/ customers. However, after reconfiguring the network, ULP Jeuram SAIFI value fell to 15.39 times/customers and SAIDI to 945.6 minutes/customers, resulting in an increase in system reliability by 70.69%.Keyword: Reconfiguration of network, distribution system, hydroelectric power plant, SAIDI, SAIFI
Gideon Adom-Bamfi, Emmanuel Asuming Frimpong
JURNAL NASIONAL TEKNIK ELEKTRO, Volume 10; https://doi.org/10.25077/jnte.v10n2.908.2021

This paper presents an approach for online generator coherency identification based on windowed dynamic time warping (DTW). Generator rotor speed deviations measured by phasor measurement units (PMUs) are used as input data to compute a DTW dissimilarity matrix. Using the dissimilarity matrix together with Agglomerative Hierarchical Clustering (AHC) and Hubert-Levin index (C-index), generators are optimally grouped into coherent clusters. In addition to the clustering of generators, an index for characterizing the transmission delay of a Wide Area Measurement System (WAMS) is presented. A data delay factor that can indicate whether there is an inconsistent PMU data transmission delay is also proposed. The coherency identification technique and indices were tested using simulations carried out on the IEEE 39-bus system. The test results indicate that the proposed scheme accurately clusters generators into coherent groups. The suggested indices were also found to be valid. Keywords : coherence identification, dynamic time warping, speed deviation, phasor measurement unit, dissimilarity matrix
Gigih Surya Adi Pratama, Hendik Eko Hadi Suharyanto, Yahya Chusna Arif
JURNAL NASIONAL TEKNIK ELEKTRO, Volume 10; https://doi.org/10.25077/jnte.v10n2.910.2021

In making the PV array system work optimally without a hitch, it is important to recognize and know where the fault occurs. The current and voltage represent the conditions of a PV array, so that, in this paper, the proposed method is based on the current and voltage values for each string, four identified conditions, namely free fault conditions, partial shading, short circuit and open circuit. Neural network is used as a tool for predicting the type and location of faults, fault samples are obtained from simulations through PSIM and the learning process is carried out through MATLAB/Simulink, the algorithms used in the learning process are also compared to see which are the best. As a result, neural network was able to identify the type and location of faults on the PV array. This proves that the condition of a PV array can be explained through its voltage and current values.Keyword: PV array, partial shading, short circuit, open circuit, neural network
Elsi Alfionita Syawal, Refdinal Nazir
JURNAL NASIONAL TEKNIK ELEKTRO, Volume 10; https://doi.org/10.25077/jnte.v10n2.889.2021

Currently, the supply of electrical energy is still not fulfilled in some areas due to the depletion of conventional energy sources and fossil energy. The ideal alternative energy is renewable energy that does not have the potential to run out such as solar energy, biomass and water. Senamat Ulu is a village in Bungo Regency that has the potential for biomass power generation because it has a lot of palm oil plantations covering an area of 3,917 hectares with an average production of 6,901 tons per year. Based on the coordinates of the center of the village, simulation Homer scored solar radiation of 4.43 kWh / m2/ day for Ulu Senamat area. The purpose of this research is to obtain the amount of biomass energy potential and the optimal model for the hybrid system of power generation in Senamat Ulu Village. From the results of the study, it was found that the potential for electrical power from the biomass power plant in Senamat Ulu was 6,113.65 kW consisting of 2,189.08 kW shells and 3,924.57 kW palm fiber. The most optimal generator model is simulation I in terms of the smallest NPC and COE economies, namely NPC $ 275,091 and COE $ 0.0768/kWh where Biomass is 49,946 kWh/year at a cost of $ 0.0271/kWh, PV 26,681 kWh/year with electricity price of $ 0.107/kWh, Micro hydro 156.025 kWh/year with electricity price of $ 0.00992/kWh, Storage Li-ion 8,643 kWh/year and converter 288,331 kWh/year and the time required to payback is 5.8 years.Keywords: Optimization, NPC, COE
Adrianti Adrianti, Edwindiansyah Asharry, Muhammad Nasir
JURNAL NASIONAL TEKNIK ELEKTRO, Volume 10; https://doi.org/10.25077/jnte.v10n2.920.2021

Installation of distributed generations (DGs) can cause performance degradation of distribution lines protection. Therefore, the objective of this paper is to propose a protection scheme that can be a solution for this protection line degradation.. The proposed scheme consist of quadrilateral distance relays at upper stream of the lines and directional overcurrent relays at downstream of the lines. The performance of the scheme was tested using Digsilent Powerfactory simulation. The simulation was carried out for four fault types, 0 - 50 Ohms fault resistance and four network conditions/scenarios. The test system consist of three current source i.e. Grid, DG1 and DG2. Variation on-off state of the three current sources is applied in order to check the ability of the scheme to perform correctly for multiple network condition and possibility installation of new DG in the future. The results show that the scheme perform correctly for all bolted fault regardless of fault types, fault location and network scenarios. For three phase and two phase to ground faults the scheme perform correctly for all simulated fault resistance. However, for single line to ground faults and phase to phase faults, the scheme has limitation on maximum fault resistance that can result in correct operation. In general, the proposed scheme able to protect the distribution lines better than the scheme of previous research, but it has a slightly higher chance to perform unwanted operation.Keywords : Distribution line protection, distributed generation, quadrilateral distance relay, directional overcurrent relay
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