iosr-JEEE   Volume-15 ~ Issue-6 ~ Nov. – Dec. 2020

Abstract: This paper proposed an assessing service transformer health model using data that has been collected by a real-time data acquisition and analysis device collocated with the transformer. The online data is provided to the operator in near real-time over the Internet and the operators can evaluate directly the status of the distribution transformer, then giving proper responds. The top oil temperature, vibration and transformer loading are chosen as monitored parameters. The condition of the considered service transformer is determined out using machine learning algorithms. The structure of this algorithm will be presented specifically in the paper. A case study is implemented on a stimulated service transformer to evaluate the effectiveness of the proposed model

Keywords: transformer health, machine learning, energy monitoring

[1] N. M. Rao, R. Narayanan, B. R. Vasudevamurthy, and S. K. Das, "Performance requirements of present-day distribution transformers for Smart Grid," in 2013 IEEE Innovative Smart Grid Technologies-Asia (ISGT Asia), 2013, pp. 1-6.
[2] A. E. B. Abu-Elanien, M. M. A. Salama, and M. Ibrahim, "Determination of transformer health condition using artificial neural networks," in 2011 International Symposium on Innovations in Intelligent Systems and Applications, 2011, pp. 1-5.[3] E. Aburaghiega, M. E. Farrag, and M. M. Gouda, "On-line Condition Monitoring of Power Transformer Health Status Enforced by Temperature and Electrical Signatures," in 2019 21st International Middle East Power Systems Conference (MEPCON), 2019, pp. 521-526.
[4] J. R. Agüero, "Applications of smart grid technologies on power distribution systems," in 2012 IEEE PES Innovative Smart Grid Technologies (ISGT), 2012, pp. 1-1.
[5] A. D. Ashkezari, H. Ma, T. K. Saha, and C. Ekanayake, "Application of fuzzy support vector machine for determining the health index of the insulation system of in-service power transformers," IEEE Transactions on Dielectrics and Electrical Insulation, vol. 20, pp. 965-973, 2013.

Abstract: This study aims to investigate the practices, level of awareness, and behavior on the basic safety precautions on electrical fire prevention among residents in the City of Bislig, Philippines. The study uses descriptive method of research utilizing a researcher-made survey-questionnaire. Microsoft Excel and SPSS version 21 were used to analyze the collected data. The study revealed areas of concern that need immediate interventions. In terms of practices, respondents have low level of practice for annual house wiring inspection, poor habit in securing building permits and clearances; and no structured house routines for electrical fire prevention. Respondents level of awareness showed that they are not highly aware of the correct ampere rating of fuse and circuit breaker, standard.....

Keywords: Electrical Fire, Residence, Safety Precautions, Awareness, Practice, Behavior

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[5]. Formisano, B. (Updated 2020, January 1). 4 Reasons Why Circuit Breakers Trip and Fuses Blow. Retrieved from https://www.thespruce.com/why-circuit-breakers-trip-1824676.

Abstract: In this paper, based on the theory of M-matrix, by constructing proper vector Liapunov functions, the globally exponential stability is investigated for a class of bidirectional associative memory neural networks with fuzzy logic and distributed delays. Without assuming the boundedness, monotonicity and differentiability of the activation functions, the new sufficient criterions for ascertaining the exponential stability of the equilibrium point of such neural networks are obtained. Since the criterion is independent of the delays and simplifies the calculation, it is easy to test the conditions of the criterion in practice.

Keywords: bidirectional associative memory, globally exponential stability; vector Liapunov function; fuzzy logic; distributed delays

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Abstract: In this paper a new symmetrical seven level multilevel inverter is proposed. The input source for the multilevel inverter is a series combination of three PV arrays. In this paper we compare the outputs of three
phase bridge inverter and seven level multilevel inverter for input of a PV system. Here two cases are considered. In first case, PV module output is applied to three phase full bridge inverter. In second case, PV
module output is applied to symmetrical seven level inverter. The more the number of PV modules the more the number of voltage levels, the more faithful......

Keywords: Symmetrical seven level inverter, PV module, pulse width modulation (PWM), three phase bridge inverter, total harmonic distortion (THD), power quality, multilevel inverter (MLI).

[1]. M. Manojkumar, K. Porkumaran, and C. Kathirvel, ―Power electronics interface for hybrid renewable energy system—A survey,‖ in Proc. Int. Conf.Green Comput.Commun. Elect. Eng.,Coimbatore, India, Mar. 2014, pp. 1–9.
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[3]. A. K. Rathore, J. Holtz, and T. Boller, ―Generalized optimal pulsewidth modulation of multilevel inverters for low-switching-frequency control of medium-voltage high-power industrial AC drives,‖ IEEE Trans. Ind. Electron., vol. 60, no. 10, pp. 4215–4224, Oct. 2013. 2249–2258, Jun. 2009.
[4]. N. Yousefpoor, S. H. Fathi, N. Farokhnia, and H. A. Abyaneh, ―THD minimization applied directly on the line-to-line voltage of multilevel inverters,‖ IEEE Trans. Ind. Electron., vol. 59, no. 1, pp. 373–380, Jan. 2012.
[5]. Y. Liu, H. Hong, and A. Q. Huang, ―Real-time algorithm for minimizing THD in multilevel inverters with unequal or varying voltage steps under staircase modulation,‖ IEEE Trans. Ind. Electron., vol. 56, no. 6, pp..

Abstract: This paper focuses on the economical feasibility of hybrid power system for rural area application in India .It is modeled by considering metrological data for a rural area of Madhya Pradesh Chitrakoot District at MGCGV ( 25° 09'22.20''N81°07'.99''E) . Thus the proposed standalone hybrid power system includes PV panels, Wind Turbine, Power Converter & Battery for storage. Analysis was carried out by connecting a load with daily energy consumption of effective 11.27Kwh/day for max demand of 2.39KW. The metrological data of the site was extracted from National Aeronautics and Space Administration (NASA) and National Renewable Energy Lab (NREL).The simulated results shows economical combination and sizing of components which leads us to the sensitivity analysis to get a better understanding of which model is feasible from both efficiency and economy point of view for the proposed region...

Keywords: PV, Wind Turbine, Diesel, Battery, Economical Analysis, HOMER Pro. Generic freewheel battery

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Abstract: The effective value (usually calculated through the RMS value) is of great importance in electrical engineering and related areas. This article seeks to review the concepts to know how to proceed in cases of nonlinear resistance. The results are validated with application of theory in conjunction with simulation in LTSpice software, and taking advantage of the numerical convergence of the software for resolution of recursive integrals without algebraic solution.In this article few things are used to demonstrate the importance of correct calculation, which are algebra for deductions, Microsoft Excel for calculations with many values, and LTSpice for simulation of a simple circuit.There is deviation of 8.85% from the RMS voltage to effective voltage even when a small AC voltage (100 mV) is overimposed to the quiescent...

Keywords: Effective value; Effective apparent resistance; Effective resistance; RMS value.

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[3]. Cartwright, K. V. 2007. "DETERMINING THE EFFECTIVE OR RMS VOLTAGE OF VARIOUS WAVEFORMS WITHOUT CALCULUS‟. Technology Interface International Journal. Volume 8, Number 1.
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Abstract: Train accidents are not as common as road accidents, which is why they are not been showed as a major threat. But unfortunately, when train accident happe ns, it results to serious injuries and fatalities. Most of the time, the accidents occur due to missing track lines and unpredictable bends. So, the idea is to develop a system that can find these faults before any misery happens. The project is based on railway track fault detection, the main goal is to develop a bot that can detect any crack or any unwanted faults in the railway tracks. The bot uses ultra-sonic sensor to detect any crack or missing track lines or any unwanted bends. If any defect is detec ted then the ultrasonic sensor sends a signal to the Arduino UNO board and it then sends a command to the Global System for Mobile Communications (GSM) module and the GSM module sends a call to the control room and......

Keywords: Arduino UNO, Ultrasonic sensor, GSM Module, Motor driver, GPS module

[1]. "Automotive Crack Detection for Railway Track Using Ultrasonic Sensor", S. Sam Jai Kumar, T. Joby Titus, V. Ganesh, V.S. Sanjana Devi, International Journal of Engineering Technology and Computer Research, Volume. 4; Issue 6; November-December; 2016.
[2]. "Implementation of Railway Crack Detection and Monitoring System", V. Elanangai, International Journal of Scientific & Engineering Research, Volume 9, Issue 11, November-2018.
[3]. "Automatic Railway Track Crack Detecting Vehicle", G. Rakesh, Prof. B. Durga Prasad, International Journal of Emerging Technologies and Innovative Research, October 2017, Volume 4, Issue 10.
[4]. "Automatic detection of squats in railway track", Ravi Shankar Shekhar, Purushottam Shekhar, Ganesan P, International Conference on Innovations in Information, Coimbatore, 2015.
[5]. "Obstacle Detection on Railway Tracks Using Vibration Sensors and Signal Filtering Using Bayesian Analysis", Dhiraj Sinha, Farhan Feroz, IEEE Sensors Journal, Vol. 16, Issue. 3, Feb.1, 2016..