Sümeyra Mustafaoğlu, H. Çiftçi, Beigin Emre Türkay
{"title":"Short Circuit Analysis in Grid Connected with High Penetration of PV Systems","authors":"Sümeyra Mustafaoğlu, H. Çiftçi, Beigin Emre Türkay","doi":"10.23919/ELECO47770.2019.8990580","DOIUrl":"https://doi.org/10.23919/ELECO47770.2019.8990580","url":null,"abstract":"One of the biggest problems encountered in Photovoltaic (PV) systems is to contribute to the fault current in case of failure. The fault current profile differs considerably from the system without the PV as the number of PV increases. Operation of the protection devices is also affected by this fault current change. In this paper, grid-connected solar energy system was designed in PSCAD program and the short current values given to the grid were examined. The contribution of the PV systems to the grid was examined for the fault condition. Both fault and normal cases were compared by the currents","PeriodicalId":6611,"journal":{"name":"2019 11th International Conference on Electrical and Electronics Engineering (ELECO)","volume":"38 1","pages":"992-996"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85373431","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}
{"title":"Nonlinear Two-Wheeled Self-Balancing Robot Control Using LQR and LQG Controllers","authors":"Jamil Dabbagh, I. Altas","doi":"10.23919/ELECO47770.2019.8990610","DOIUrl":"https://doi.org/10.23919/ELECO47770.2019.8990610","url":null,"abstract":"This paper studies the control of unstable and nonlinear two-wheeled self-balancing robot (TW-SB) using linear optimal control methods like LQR and LQG. The control purpose is to keep system stability around an equilibrium point while the robot is moving towards the desired point. A linearized mathematical model is described to obtain a linearized state space model in order to develop a controller and estimator. The designed controller has implemented on the nonlinear dynamics model of the robot. An optimal linear quadratic estimator has been designed to estimate the states of the system and has been connected to an optimal full state feedback regulator. The simulation results obtained in Matlab/Simulink show that the proposed controller is able to achieve the self-balancing while the wheels rotate towards the set-point position. Besides that, the controller has robustness to reject disturbances and noises applied to the system.","PeriodicalId":6611,"journal":{"name":"2019 11th International Conference on Electrical and Electronics Engineering (ELECO)","volume":"90 1","pages":"855-859"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88504331","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}
Nur Efşan Köksal, A. Atilgan, Ugur Harmanci, A. Yildiz
{"title":"Fabrication of ß-GaiO3/Si Solar-Blind UV Photodiode via Sol-Gel Method","authors":"Nur Efşan Köksal, A. Atilgan, Ugur Harmanci, A. Yildiz","doi":"10.23919/ELECO47770.2019.8990517","DOIUrl":"https://doi.org/10.23919/ELECO47770.2019.8990517","url":null,"abstract":"In this paper, a new SnO<inf>2</inf>/Ga<inf>2</inf>O<inf>3</inf>/Si heterostructure has been designed and fabricated via sol-gel spin coating method. The electrical property of SnO<inf>2</inf>/Ga<inf>2</inf>O<inf>3</inf>/Si heterostructure is investigated in the dark and under UV illumination with a wavelength of 254 nm by means of the current-voltage (I-V) measurements. It is clearly seen that the photodiode is sensitive to UV light and it also has to rectify behavior. The fabricated solar-blind UV photodiode is a promising candidate to detect UV light. The temporal response to UV light obviously shows that the good reproducibility of the photodiode.","PeriodicalId":6611,"journal":{"name":"2019 11th International Conference on Electrical and Electronics Engineering (ELECO)","volume":"27 1","pages":"406-408"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75444495","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}
{"title":"Modified Packed U-Cell Active Filter using Fuzzy Self-Tuning Control Method for Power Systems","authors":"Özkan Özkara, A. Karaarslan","doi":"10.23919/eleco47770.2019.8990512","DOIUrl":"https://doi.org/10.23919/eleco47770.2019.8990512","url":null,"abstract":"In this study, the Fuzzy Self-Tuning (FST) control method that is implemented to Modified Packed U-Cell (MPUC) Active Filter is presented. The MPUC Active Filter application is designed for compensation of reactive power at power systems. The main purpose of MPUC is filtered out undesirable harmonics in the power system. This study deals with the control of active filter topology that is reconfiguration of packed u-cell inverter. The MPUC active filter consists of three cells separated by two capacitors. The FST control method and generation of the reference signal is implemented to MPUC active filter. The MPUC active filter based on the FST control method can eliminate harmonics, compensate reactive power and balance load instability. The generation of current and voltage reference is one of the important points of a proper application of this MPUC active filter. The FST control operation of the MPUC active filter is verified by Matlab/Simulink software. The simulation results show that the applicability of the MPUC active filter with the FST control method and compatible with IEEE 519 and IEC 61000-3-2 Standards.","PeriodicalId":6611,"journal":{"name":"2019 11th International Conference on Electrical and Electronics Engineering (ELECO)","volume":"9 1","pages":"316-322"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85271585","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}
{"title":"Privacy Concerns on Mobile Applications for Google Play Store Market","authors":"Ala Rabea, Meltem Mutlutürk, B. Metin","doi":"10.23919/eleco47770.2019.8990578","DOIUrl":"https://doi.org/10.23919/eleco47770.2019.8990578","url":null,"abstract":"Since the introduction of smartphones and mobile applications, privacy concerns have been rapidly rising. Today, over one billion people use smartphones. Millions of different apps are being used and installed on daily basis. Whether it’s Android, IOS, Windows, or any other mobile operating system, an app might need to request extra permissions to access more data on the user’s phone. In this study, Android apps from Google Play Store are examined. Python scraping code was used to collect details about over 5,000 apps including different parameters such as permissions requested, number of installs, reviews, and several other details. The data was then analyzed using SPSS. The analyses made included descriptives and correlation. The data analysis was fruitful and different hypothesis were supported at high significance. The results showed that number of permissions requested by an app is correlated with several other variables such as number of reviews, number of installs, and review score. Limitations are mentioned in the conclusion.","PeriodicalId":6611,"journal":{"name":"2019 11th International Conference on Electrical and Electronics Engineering (ELECO)","volume":"9 1","pages":"968-972"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82049165","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}
{"title":"Detecting and Counting of Each Nested Curve on Spectrum with Gaussian Package","authors":"Y. Kocak, S. Sevgen, R. Samli","doi":"10.23919/ELECO47770.2019.8990594","DOIUrl":"https://doi.org/10.23919/ELECO47770.2019.8990594","url":null,"abstract":"Spectral analysis plays an important role in the interpretation of astronomical data. The determination of the number and parameters of each nested Gaussian curve on spectrum of any object in the sky gives information about the physical and chemical structure of the object. In this study, determination of each nested Gaussian curve’s number and parameters such as position, width and amplitude in a given frequency range are performed. Thus, we have knowledge of about, which molecules there are in the observation region. Autonomous Gaussian Decomposition algorithm is implemented with additional scipy, numpy, h5py, lmfit packages. The algorithm is tested on spectral data that comes from active star forming region called as Orion KL obtained by SMA (Submillimeter Array) devices are used. Finally, information is given about positive and negative aspects of these study and in the future what should we do to improve the accuracy.","PeriodicalId":6611,"journal":{"name":"2019 11th International Conference on Electrical and Electronics Engineering (ELECO)","volume":"23 1","pages":"565-569"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90730955","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}
{"title":"Implementation and Analysis of Reference Very Low Frequency (VLF) AC High Voltage Measuring System","authors":"İ. Karaman","doi":"10.23919/ELECO47770.2019.8990498","DOIUrl":"https://doi.org/10.23919/ELECO47770.2019.8990498","url":null,"abstract":"Purpose of this paper, reference very low frequency (VLF) AC high voltage measuring system is creation and examination. High voltage AC measurements and tests are usually performed at 50 Hz frequency. Recently, test systems developed for cable testing have required a frequency range from 0.01 Hz to 1 Hz for AC high voltage measurements. It is not possible to measure very low frequency AC high voltages using conventional AC high voltage measurement methods. In this paper, the definition of the developed measurement system, the required physical conditions, the taking and evaluation of the related measurement data are described in detail.","PeriodicalId":6611,"journal":{"name":"2019 11th International Conference on Electrical and Electronics Engineering (ELECO)","volume":"2 1","pages":"983-986"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78253938","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}
Ahmet Efe Seker, Egemen Aslan Sakaci, Arif Deniz, B. Celik, D. Yıldırım
{"title":"Thermal Analyses for a Simplified Medium-Voltage Switchgear: Numerical and Experimental Benchmark Studies","authors":"Ahmet Efe Seker, Egemen Aslan Sakaci, Arif Deniz, B. Celik, D. Yıldırım","doi":"10.23919/ELECO47770.2019.8990614","DOIUrl":"https://doi.org/10.23919/ELECO47770.2019.8990614","url":null,"abstract":"Present study reports experimental and computational results obtained for a switchgear, where its critical components such as busbars, and tulip contacts are numerically modeled. In the experiment, thermocouples are used to measure the temperature at several locations of the switchgear at operating condition. One-way coupled EMAG and CFD computations are performed to obtain eddy current losses first, then the temperature and velocity distributions are obtained for the natural convection in and out of the model that is induced by the losses. Comparison of the obtained temperature distributions show that the experimental and computational results are in similar trend in general. In order to understand the causes of local discrepancies in the results, it is considered to conduct computations on a high performance computing environment for a more realistically modelled electrical components.","PeriodicalId":6611,"journal":{"name":"2019 11th International Conference on Electrical and Electronics Engineering (ELECO)","volume":"1 1","pages":"116-120"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88760935","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}
{"title":"Design and simulation of 26 GHz patch antenna for 5G mobile handset","authors":"Cihat Şeker, M. Güneser","doi":"10.23919/ELECO47770.2019.8990634","DOIUrl":"https://doi.org/10.23919/ELECO47770.2019.8990634","url":null,"abstract":"In this paper, we proposed a compact microstrip monopole antenna, for fifth generation (5G), can operating in millimeter wave (mmWave) communication. It is consisted of RO4003 with thickness of 0.203 mm and it was designed as planar-fed single-band by placing quarter circular slots on rectangular patch, as a simple and compact structure. Thus, the proposed antenna was simulated in the Ansys HFSS module and various antenna parameters such as radiation performance and ante006Ena gain were obtained in a single frequency range. The return-loss bandwidth was measured as 2.49 GHz centering at 26 GHz, covering the required bandwidth of 5G standard, as a reference of -10 dB.","PeriodicalId":6611,"journal":{"name":"2019 11th International Conference on Electrical and Electronics Engineering (ELECO)","volume":"38 1","pages":"676-678"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85257088","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}
{"title":"A New Transfer Matrix-Based Approach for Protection and Faulted Section Identification of Hybrid Power Transmission Lines","authors":"Saeed Asgharigovar, O. Usta","doi":"10.23919/eleco47770.2019.8990552","DOIUrl":"https://doi.org/10.23919/eleco47770.2019.8990552","url":null,"abstract":"Hybrid power transmission lines, which comprise a combination of overhead line and underground cable sections, are recently being developed by power utilities due to some noticeable reasons. Since, there are large differences between parameters of these sections, these kinds of lines are nonhomogeneous. Hence, conventional protection and fault location methods are inapplicable to hybrid lines. In this regard, we introduce a transfer matrix-based unit protection approach to obtain a new criterion for fault detection, classification and faulted section identification on a two- section hybrid line. Indeed, calculated voltages of the junction point of the overhead line and underground cable sections from both ends play roles as key factors of the proposed method. In this paper, MATLAB Simulink is utilized to implement computer simulation studies. Simulation results confirm security, dependability and efficiency of the proposed approach.","PeriodicalId":6611,"journal":{"name":"2019 11th International Conference on Electrical and Electronics Engineering (ELECO)","volume":"15 1","pages":"49-53"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82521794","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}