Vol 3 No 2 Pub Date : 2020-12-31 DOI: 10.30537/sjet.v3i2.657

Muhammad Atif Qaimkhani, S. Samo, S. Shaikh, Tanweer, Hussain

引用次数: 0

Modeling and Simulation of Under -Frequency Relay for Generator Protection 发电机保护低频继电器的建模与仿真

Vol 3 No 2 Pub Date : 2020-12-31 DOI: 10.30537/sjet.v3i2.626

A. Memon, M. A. Koondhar, Imdad Ali Memon, Masood Ali Koondhar, I. A. Channa

{"title":"Modeling and Simulation of Under -Frequency Relay for Generator Protection","authors":"A. Memon, M. A. Koondhar, Imdad Ali Memon, Masood Ali Koondhar, I. A. Channa","doi":"10.30537/sjet.v3i2.626","DOIUrl":"https://doi.org/10.30537/sjet.v3i2.626","url":null,"abstract":": Power systems are undergoing structural changes induced by the combination of the operation of microgrids and distributed generation units. This transfiguration has impersonated new challenges in well-established power system practices, coordination of protection systems and especially on the design. Same time, technological improvements in protective equipment have set up the basis for the development of digital frequency relays (DFL) which enable an alternate approach to standard protection schemes. It is necessary for the power system to operates, regulates and manages ancillary services more efficiently to maintain the reliability of the system. The power system is continually laying unexpected contingencies which cause inequality between load demand and generated power. Such uncertainties cause the disturbance in the power system frequency. The only way to maintain power system frequency by balancing load and generation. In this paper, we have designed the under-frequency relay (UFL) model in Matlab simulink. We have noticed that when the load on the system is increased, the designed model shed the extra load and are modeled through under frequency relay by comparing the frequency responses of the power system.","PeriodicalId":412168,"journal":{"name":"Vol 3 No 2","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126642902","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

Dynamic Modeling and Vector Control of AC Induction Traction Motor in China Railway 中国铁路交流感应牵引电机动态建模与矢量控制

Vol 3 No 2 Pub Date : 2020-12-31 DOI: 10.30537/sjet.v3i2.622

Mannan Hassan, M. S. Shaikh, H. Jadoon, Rao Atif, M. U. Sardar, H. Munir

引用次数: 10

Micro-Grid Stability Improvement Using Static Synchronous Compensator Assisted with Battery Energy Storage System 利用静态同步补偿器辅助电池储能系统提高微电网稳定性

Vol 3 No 2 Pub Date : 2020-12-31 DOI: 10.30537/sjet.v3i2.697

S. Imtiaz, Muhammad Massab Khan, Zubair Yamin, Muhammad, Siddique, Ashfaq Riaz

引用次数: 0

Teaching Oral Communication Skills to Healthcare Personnel Using Communicative Language Teaching Technique 运用交际语言教学法对医护人员进行口语交际技巧教学

Vol 3 No 2 Pub Date : 2020-12-31 DOI: 10.30537/sjet.v3i2.599

F. Arain, Hira Khadim, M. A. Jatoi, Hina Manzoor

引用次数: 1

Nature Inspired Optimization Techniques, A review for FANETs 自然启发优化技术，FANETs综述

Vol 3 No 2 Pub Date : 2020-12-31 DOI: 10.30537/sjet.v3i2.716

Shahzad Hameed, Q. Minhas, Sheeraz Ahmed, Asif Nawaz, M. Shahzad, Naveed Jan

{"title":"Nature Inspired Optimization Techniques, A review for FANETs","authors":"Shahzad Hameed, Q. Minhas, Sheeraz Ahmed, Asif Nawaz, M. Shahzad, Naveed Jan","doi":"10.30537/sjet.v3i2.716","DOIUrl":"https://doi.org/10.30537/sjet.v3i2.716","url":null,"abstract":": Flying Ad Hoc Network (FANET) is a revolutionary achievement in the class of ad hoc networks to access areas near calamities. The concept of pilot free system takes place in technological advancement and computations. Networking advancements introduces Unmanned Aerial System (UAS) while the device that makes this system applicable is known as flying drones or Unmanned Aerial Vehicle (UAV). Single UAV may be employed as individual system, but it is more useful when UAVs in a network cooperate with each other. UAV deployments are rapid and pliant that reduces the tradition ad hoc network limitations. UAV have small operating structure and efficient energy life. Advance flight control mechanism makes FANETs differ from traditional ad hoc networks. FANETs can visualized to play key role where humans are in danger or rescue tasks are too dull or dirty. Improving the performance of flying drones leads to ease-of-use for formation of network, high stability and fast deployment. Routing and cooperative task allocation of nodes is complex in ad hoc networks. In contrast of the study of traditional schemes, our paper is based on the nature inspired schemes. This review study in on routing protocols of BeeAdHoc, AntHocNet and Moth-Ant inspired routing. In addition, the overview leads to wild life behavior of Hill Myna and Desert Sparrow Optimization comparative to other biological algorithms is presented in terms of task allocation and rendezvous cooperatively. Biological inspired behaviors trend to know the efficient problem solutions for FANETs.","PeriodicalId":412168,"journal":{"name":"Vol 3 No 2","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130912015","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: 3

Computation of Electronic Conductivity of Pentance By Castep As Semiconductor Material 用Castep作为半导体材料计算Pentance的电子导电性

Vol 3 No 2 Pub Date : 2020-12-31 DOI: 10.30537/sjet.v3i2.685

引用次数: 0

The Design of Low-Cost Synchronous Reluctance Motor with a Surrogate-Assisted Optimization Technique 基于代理辅助优化技术的低成本同步磁阻电机设计

Vol 3 No 2 Pub Date : 2020-12-31 DOI: 10.30537/sjet.v3i2.587

S. A. Bukhari, Imtiaz Ali Leghari, J.I. Bhatti, S. Raza, M. A. Koondhar, I. A. Channa, M. Usman, Keerio

{"title":"The Design of Low-Cost Synchronous Reluctance Motor with a Surrogate-Assisted Optimization Technique","authors":"S. A. Bukhari, Imtiaz Ali Leghari, J.I. Bhatti, S. Raza, M. A. Koondhar, I. A. Channa, M. Usman, Keerio","doi":"10.30537/sjet.v3i2.587","DOIUrl":"https://doi.org/10.30537/sjet.v3i2.587","url":null,"abstract":"This paper presents the performance of centrifugal pump coupled with synchronous reluctance motor of 24kW. The 4-pole 36 slots induction motor stator has been used for the prototype. The reduction of torque ripple and power losses is the main aim of research. Different arrangement of rotor flux barrier shapes has been tested through finite element analysis method. The rotor optimization is done by varying different parameters are used such as, barrier edge angle, width of flux carriers, flux barriers and shaft diameter. In order to improve the motor performance, the method of particle swarm optimization has been used by generating samples with surrogate assisted optimization technique. Distinct flux barrier shapes and designs have been checked through simulation. For the prototype development, final V-shaped best model is chosen. The proposed rotor shows the excellent performance in terms of reduced torque ripple (27%) and improved average torque (154Nm) in experimental results. The suggested design also has good thermal and mechanical performances with the capability to use in various industrial applications.","PeriodicalId":412168,"journal":{"name":"Vol 3 No 2","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131085916","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

Current status of microalgae to produce Biogas through Pretreatment of lignocellulosic waste in the era of 21-Century 21世纪木质纤维素废弃物预处理微藻产沼气的现状

Vol 3 No 2 Pub Date : 2020-08-10 DOI: 10.20944/preprints202008.0233.v1

A. Ishaq, F. Jabeen, M. Manzoor, T. Younis, A. Noor, F. Noor

引用次数: 1

A Modified 3-Point Adams Block Method of the Variable Step Size Strategy for Solving Neutral Delay Differential Equations 中立型时滞微分方程变步长策略的改进三点Adams块法

Vol 3 No 2 Pub Date : 2020-03-05 DOI: 10.30537/sjcms.v3i2.452

U. Yashkun, Nurul Huda Abdul Aziz

引用次数: 1

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