ELEKTRIKA- Journal of Electrical Engineering最新文献

Review of Error Correction in 2D Shingled Magnetic Detection 二维带状磁检测中的纠错回顾

ELEKTRIKA- Journal of Electrical Engineering Pub Date : 2023-12-26 DOI: 10.11113/elektrika.v22n3.265

M.B Abdulrazaq, Hassan Abdullahi, B.O Sadiq, H. Zaharuddeen, U. Abubakar, M.D Almustapha

引用次数: 0

Comparison of APF and STATCOM for Current Harmonic Mitigation APF 与 STATCOM 在电流谐波缓解方面的比较

ELEKTRIKA- Journal of Electrical Engineering Pub Date : 2023-12-26 DOI: 10.11113/elektrika.v22n3.438

Abdulrahman Mohammed Galadima, Rasyidah Mohamad Idris

{"title":"Comparison of APF and STATCOM for Current Harmonic Mitigation","authors":"Abdulrahman Mohammed Galadima, Rasyidah Mohamad Idris","doi":"10.11113/elektrika.v22n3.438","DOIUrl":"https://doi.org/10.11113/elektrika.v22n3.438","url":null,"abstract":"The application of solid-state electronic devices has recorded a geometric increase in the last decade. Devices such as battery charging systems, inverters, switch mode power supplies and a host of electronic-based devices referred to as non-linear loads distort the source signal (particularly the current). Harmonics distortion imposes a severe impact on the well-being of the power system. They cause excessive device heating, reduced performance efficiency, early insulation failure, decreased dynamic torque in rotating systems, etc. This paper bases a study on Active Power Filter (APF) and Static Synchronous Compensator (STATCOM) for mitigation of these distortive harmonics in a system of 3-phase 11kV/400V, 400kVA feeding a system of non-linear loads. The study is based on the IEEE519 standard limits for current harmonics measured at the PCC. Therefore, the system short circuit ratio (SCR) is first determined. Using synchronous reference frame and instantaneous reactive power theories, the APF and STATCOM are respectively designed and run using MATLAB/Simulink software. The result analysis is obtained from the FFT signal processing toolbox of the software, and the device’s performances are evaluated based on the set standard. Results from the FFT spectra showed that the model system contains a considerable number of harmonics before filtering. However, when these devices are connected to the system, all higher-order harmonics have been minimized to the least fractions with respect to the standard, with STATCOM giving a comparatively better performance.","PeriodicalId":312612,"journal":{"name":"ELEKTRIKA- Journal of Electrical Engineering","volume":"1 1‐2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139156479","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

Genetic Algorithm for Solving Mobile Robot Scheduling Problem in Flexible Manufacturing Environment 解决柔性制造环境中移动机器人调度问题的遗传算法

ELEKTRIKA- Journal of Electrical Engineering Pub Date : 2023-12-26 DOI: 10.11113/elektrika.v22n3.485

Erlianasha Samsuria, Mohd Saiful, Azimi Mahmud, N. Wahab, Mohamad Shukri, Zainal Abidin, S. Buyamin

{"title":"Genetic Algorithm for Solving Mobile Robot Scheduling Problem in Flexible Manufacturing Environment","authors":"Erlianasha Samsuria, Mohd Saiful, Azimi Mahmud, N. Wahab, Mohamad Shukri, Zainal Abidin, S. Buyamin","doi":"10.11113/elektrika.v22n3.485","DOIUrl":"https://doi.org/10.11113/elektrika.v22n3.485","url":null,"abstract":"The scheduling genuinely a complex process, aimed at optimizing operational activities in pursuit of one or more objectives by leveraging production data which may include previous schedules. The scheduling problem in Flexible Manufacturing System (FMS) is commonly categorized as Nondeterministic Polynomial (NP)-hard combinatorial optimization problems and it remains as an endure problem to industrial practitioners and researchers. As part of real production scheduling, once one task is finished processing on a machine, transportation equipment such as mobile robot transports the completed task to the next machine. The problem of scheduling mobile robot in FMS pertains to the task allocation process for the robots, considering the transportation costs and the time spent to complete all operations. In recent years, Genetic Algorithm (GA) has been a remarkably effective search algorithm for solving a wide range of scheduling problems in a manner that achieves near-optimal solutions. This paper presents the metaheuristic techniques, specifically genetic algorithm, to address the NP-hard scheduling problem of two identical mobile robots in Job-Shop FMS environment. The algorithm is developed with the aim of finding feasible solutions to the integrated problem by minimizing the amount of time it takes to finish all tasks, commonly referred to as makespan. The performance of GA is evaluated with some numerical experiments which is executed via Matlab software. The scheduling results shows that the developed GA able to obtained the near-optimal solution of minimal makespan and converge within a short period of time.","PeriodicalId":312612,"journal":{"name":"ELEKTRIKA- Journal of Electrical Engineering","volume":"83 7","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139154951","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

Dielectric Breakdown Strength of Polypropylene Blended with Ethylene Octene Elastomers 聚丙烯与辛烯乙烯弹性体混合物的介电击穿强度

ELEKTRIKA- Journal of Electrical Engineering Pub Date : 2023-12-26 DOI: 10.11113/elektrika.v22n3.478

S. Kamarudin, K. Y. Lau, N. A. Ahmad, N. A. Azrin, A. B. A. Ghani, N. A. N. Arifin

{"title":"Dielectric Breakdown Strength of Polypropylene Blended with Ethylene Octene Elastomers","authors":"S. Kamarudin, K. Y. Lau, N. A. Ahmad, N. A. Azrin, A. B. A. Ghani, N. A. N. Arifin","doi":"10.11113/elektrika.v22n3.478","DOIUrl":"https://doi.org/10.11113/elektrika.v22n3.478","url":null,"abstract":"Polymer blends have become a major focus of research in exploring the potential for new dielectric material applications, particularly in the insulation of high voltage systems. In the current research area, polypropylene (PP) is being investigated as an insulation material for high voltage alternating current and direct current power cables. However, PP must be treated with rubbery materials such as elastomers to lessen its overall stiffness for power cable extrusion. While various promising results have been published on the potential use of PP/elastomer blends as dielectric materials, the dielectric effects of adding ethylene octene elastomer to PP have been less explored. This paper discusses the alternating current (AC) and direct current (DC) breakdown strength of PP that contains different amounts of ethylene octene elastomer (10, 30, and 50 wt%). The addition of ethylene octene elastomer to PP affects the breakdown performance of the blend systems under both AC and DC fields. Significantly, an increase in elastomer contents results in a notable reduction in the AC and DC breakdown strength. A discussion is presented on the mechanisms underlying the change in the breakdown strength caused by the different amounts of ethylene octene elastomer blended with PP.","PeriodicalId":312612,"journal":{"name":"ELEKTRIKA- Journal of Electrical Engineering","volume":"26 51","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139156046","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

Proposed Electrical System Design of Streetlights at Megadike Access Road Megadike 通路路灯的拟议电气系统设计

ELEKTRIKA- Journal of Electrical Engineering Pub Date : 2023-12-26 DOI: 10.11113/elektrika.v22n3.472

Lester James Bartolo, Danilo Manalo, Mhar Deniel Rivera, Jerald Turla, John Mark Turla, Alma Tangcuangco, Errol Canlas

{"title":"Proposed Electrical System Design of Streetlights at Megadike Access Road","authors":"Lester James Bartolo, Danilo Manalo, Mhar Deniel Rivera, Jerald Turla, John Mark Turla, Alma Tangcuangco, Errol Canlas","doi":"10.11113/elektrika.v22n3.472","DOIUrl":"https://doi.org/10.11113/elektrika.v22n3.472","url":null,"abstract":"Due to the absence of streetlights, it is unsafe for drivers to travel during the night in the current state of Mega Dike. The lack of streetlights causes low visibility for drivers, which is one of the major factors that causes road crashes. Thus, this study aims to propose an electrical system design of streetlights at the Mega Dike Access Road. In order to plan an electrical system design, the proponents would take in consideration the following parameters; Illumination formula for pole spacing; voltage drop calculation; economic analysis; and simulation of the system. The results will be presented in tabulated form for the respective parameters. The study examines five (5) different cases, taking into account different lamp wattages, voltage drop considerations, and cost analysis. The study would abide with the standards set by the Philippine Electrical Code (PEC) and Department of Energy (DOE). The goal of the proposed streetlights is to provide additional security for drivers on the Mega Dike Access Road by improving visibility and reducing the risk of road crashes caused by low visibility. Generally, the significance of streetlights is needed in Mega Dike Access Road in order to address the issue of low visibility for drivers and improve overall road safety in the area.","PeriodicalId":312612,"journal":{"name":"ELEKTRIKA- Journal of Electrical Engineering","volume":"75 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139154868","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

On the Study of Interference Scenario on TV Broadcast and Wireless Systems for Emergency Communication Networks in TVWS 关于电视广播和无线系统对 TVWS 应急通信网络的干扰情况研究

ELEKTRIKA- Journal of Electrical Engineering Pub Date : 2023-12-26 DOI: 10.11113/elektrika.v22n3.388

Adegboyega Adebayo, N. Surajudeen-Bakinde, A. Afolabi, A. M. Usman, H. Lasisi

{"title":"On the Study of Interference Scenario on TV Broadcast and Wireless Systems for Emergency Communication Networks in TVWS","authors":"Adegboyega Adebayo, N. Surajudeen-Bakinde, A. Afolabi, A. M. Usman, H. Lasisi","doi":"10.11113/elektrika.v22n3.388","DOIUrl":"https://doi.org/10.11113/elektrika.v22n3.388","url":null,"abstract":"This paper investigated frequency sharing between primary TV systems (channels 32 and 49) and Emergency Communication Networks (ECNs). The networks to be implemented in the Osogbo axis of Osun State function on a secondary geographical basis, creating no harm to the original licensed primary TV viewers. A minimum separation distance of 41 dB was suggested as the protected contour for the UHF spectrum to oversee the protection of primary TV users for the UHF bands under consideration. The effects of changing the secondary systems' transmitting power, transmission frequency, and antenna height on the service coverage distance were also explored. The performance of the UHF band was evaluated when it was utilized for secondary transmission at both low and high transmitting powers, with the performance criterion being percentage coverage distance. This work complies with the International Telecommunication Union-Radio sector (ITU-R) recommendations of 16 dB for signal-to-noise ratio and 41 dB for signal strength. It can also be deduced from the result that when the transmission power of ECN devices is raised from 40 mW to 4 W, Effective Isotropic Radiated Power (EIRP) is used; it caused a 76.19% reduction in the coverage spacing for TV channels of ECN Network secondary devices. For the White Space Device (WSD) to operate in Temporal mode, the maximum allowable power (4 W) used in spatial mode should be replaced by a 76.19 per cent reduction. Additional sensing margins of 3.76 dB and 4.04 dB for channels 33 and 43 must be added to the FCC threshold limit of -114 dBm criterion for TV white spaces to assure ECN deployment without causing severe interference to TV customers.","PeriodicalId":312612,"journal":{"name":"ELEKTRIKA- Journal of Electrical Engineering","volume":"66 12","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139155103","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

Microalgae Lipids Detection and Quantification Method Towards Online Real-Time Monitoring: A Review 实现在线实时监测的微藻脂质检测和定量方法：综述

ELEKTRIKA- Journal of Electrical Engineering Pub Date : 2023-12-26 DOI: 10.11113/elektrika.v22n3.454

Kar Lok Chong, Mohd Ridzuan Ahmad

{"title":"Microalgae Lipids Detection and Quantification Method Towards Online Real-Time Monitoring: A Review","authors":"Kar Lok Chong, Mohd Ridzuan Ahmad","doi":"10.11113/elektrika.v22n3.454","DOIUrl":"https://doi.org/10.11113/elektrika.v22n3.454","url":null,"abstract":"Bioprospecting toward biofuel has appeared as a sustainable and alternative energy option as fossil fuels are finite and causing a large number of environmental problems such as global warming by the greenhouse effect, leading the development of alternative substantial energy has attracted more and more attention. Hence, microalgae are potential candidates as third generation biofuel producers to tackle this problem. Under stress-condition, microalgae can produce an abundance of value-added products such as triacylglycerols which is an energy-rich fatty acid. This review highlights various quantification and detection methods of microalgae lipids, ranging from conventional methods like gravimetric and chromatographic techniques to non-conventional methods like fluorescent staining, Raman scattering, and dielectric insulation. While conventional methods require a series of procedures, including biomass dehydration and lipid extraction, non-conventional methods provide advantages such as rapidity, low cost, and smaller sample sizes needed. Future prospects revealed that real-time monitoring and online measurement of lipid content in microalgae is required to quantify the intracellular lipid level of microalgae in controlling and rapidly adjusting the growing conditions for cultivation. These real-time results, combined with the Internet of Things (IoT) technology, can be further processed using machine learning to maximize the productivity of microalgae as an alternative biofuel producer.","PeriodicalId":312612,"journal":{"name":"ELEKTRIKA- Journal of Electrical Engineering","volume":"46 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139155843","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

Enhanced FS-PTC: Dynamic Weighting Factors for Optimal Flux and Torque Control 增强型 FS-PTC：优化通量和扭矩控制的动态加权系数

ELEKTRIKA- Journal of Electrical Engineering Pub Date : 2023-12-26 DOI: 10.11113/elektrika.v22n3.464

R. Alik, Nik Rumzi Nik Idris, Norjulia binti Mohamad Nordin

{"title":"Enhanced FS-PTC: Dynamic Weighting Factors for Optimal Flux and Torque Control","authors":"R. Alik, Nik Rumzi Nik Idris, Norjulia binti Mohamad Nordin","doi":"10.11113/elektrika.v22n3.464","DOIUrl":"https://doi.org/10.11113/elektrika.v22n3.464","url":null,"abstract":"Recently, Finite State-Predictive Torque Control (FS-PTC) of induction motors has gained significant interest in high-performance motor drive applications. The effectiveness of FS-PTC relies on the successful minimization of a cost function achieved by selecting an appropriate voltage vector. Typically, the cost function for FS-PTC is composed of errors between the predicted and reference values of torque and flux; hence a weighting factor, mathbit{lambda}, is normally employed to establish different priorities between torque and flux. However, determining the optimal is a complex undertaking, since an incorrect or suboptimal choice can needlessly compromise torque or flux responses. This paper introduces an online tuning approach for the weighting factor, based on the dynamic change of flux error. Instead of using a fixed value, the weighting factor is dynamically adjusted using a simple P or PI controller. The proposed method's performance is evaluated in this paper, considering various configurations of the controller's settings. Simulation results demonstrate that the proposed technique enhances the overall torque and flux ripples across a broad range of operating speeds, surpassing the performance of the fixed value weighting factor technique.","PeriodicalId":312612,"journal":{"name":"ELEKTRIKA- Journal of Electrical Engineering","volume":"19 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139156321","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

Supervisory Control of Solar-Wind-Biomass-Fuel Cell Energy System for Optimal Performance 太阳能-风能-生物质-燃料电池能源系统的最优性能监控

ELEKTRIKA- Journal of Electrical Engineering Pub Date : 2023-08-28 DOI: 10.11113/elektrika.v22n2.463

Babangida Modu, M. P. Abdullah, Abba Lawan Bukar, M. Mustapha

{"title":"Supervisory Control of Solar-Wind-Biomass-Fuel Cell Energy System for Optimal Performance","authors":"Babangida Modu, M. P. Abdullah, Abba Lawan Bukar, M. Mustapha","doi":"10.11113/elektrika.v22n2.463","DOIUrl":"https://doi.org/10.11113/elektrika.v22n2.463","url":null,"abstract":"Generating electricity through a hybrid renewable energy system (HRES) plays a crucial role in achieving the sustainable development goal of affordable and clean energy (SDG 7). However, designing an optimal HRES is challenging due to the fluctuating demand and intermittent nature of renewable energy sources (RES). In recent times, hybrid hydrogen-battery energy storage technologies have garnered significant attention as they offer a pathway to a sustainable HRES with zero net emissions. This research paper introduces a rule-based algorithm and a metaheuristic optimization technique called Levy Flight Algorithm (LFA) for the energy management strategy (EMS) of an independent HRES. The EMS aims to establish a sequence for power delivery among the different components within the microgrid. The LFA is employed to optimize this EMS. To account for the variability and unpredictability of renewable energy sources, the proposed EMS is evaluated across four scenarios: winter, spring, summer, and autumn. These scenarios are derived from a stochastic model of RES. The results of the evaluation demonstrate that the energy management strategy implemented to control the HRES has successfully established an environmentally friendly energy system.","PeriodicalId":312612,"journal":{"name":"ELEKTRIKA- Journal of Electrical Engineering","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133084779","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

Substrate Comparison on Multiband Reflector Performance for Intelligent Reflecting Surfaces (IRSs) 智能反射表面(IRSs)多波段反射器性能的衬底比较

ELEKTRIKA- Journal of Electrical Engineering Pub Date : 2023-08-28 DOI: 10.11113/elektrika.v22n2.457

M. Kamal, B. A. Rahim, Noor Asmawati, Binti Samsuri, Y. N. Wijayanto

引用次数: 0