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R. Jayapragash

Other affiliations: RMD Engineering College
Bio: R. Jayapragash is an academic researcher from VIT University. The author has contributed to research in topics: Switched reluctance motor & Flux linkage. The author has an hindex of 3, co-authored 9 publications receiving 82 citations. Previous affiliations of R. Jayapragash include RMD Engineering College.

Papers
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Journal ArticleDOI
TL;DR: This paper reports a review of various methods of solar tracking with gains in energy due to tracking and different MPPT algorithms, including a single axis microcontroller based automatic tracker implemented and tested for its performance in real time.
Abstract: This paper reports a review of various methods of solar tracking with gains in energy due to tracking and different MPPT algorithms. The fossil fuels are non-renewable, limited and deplete. Therefore, it is imperative to find alternative sources of energy. As solar energy is available abundantly in nature, it can be considered as a best alternative to meet the energy demand. It is sustainable, renewable and scalable. Increasing the efficiency of harnessing solar energy should be one of our foremost concerns as it is a renewable source. The challenge in tapping this energy is to increase the efficiency as well as to reduce the cost of production. Therefore an attempt is made to review the various Maximum Power Point Tracking (MPPT) algorithms, different solar tracking methods and the energy gained by using these methods. Further, a single axis microcontroller based automatic tracker is implemented and tested for its performance in real time. The work focusses on the orientation of solar panel towards the direction of maximum radiation by using a stepper motor interfaced with ARM processor.

95 citations

Proceedings ArticleDOI
01 Mar 2019
TL;DR: Simulation results reveal that ISA appears to be a robust unconventional technique for elucidating the ELD problems in microgrid when compared with the other optimization techniques taking into consideration the superiority of the solution attained.
Abstract: This paper presents Interior search algorithm for solving economic load dispatch problem of a microgrid. ISA is a aesthetic seeking algorithm which is inspired from the interior design and decoration. The efficacy of ISA has been validated on a simple microgrid test system which comprises wind generators, fuel cells, diesel generators. Simulation results reveal that ISA appears to be a robust unconventional technique for elucidating the ELD problems in microgrid when compared with the other optimization techniques taking into consideration the superiority of the solution attained.

8 citations

Proceedings ArticleDOI
13 Jun 2013
TL;DR: In this article, the authors presented an analysis of a Switched Reluctance Machine (SRM) operated as a motor and generator for various operating conditions using finite element analysis (FEA).
Abstract: This paper presents analysis of a Switched Reluctance Machine (SRM) operated as a motor and generator for various operating conditions using Finite Element Analysis (FEA). Based on the data of flux linkage and torque obtained using FEA, the inductance value is calculated. Also developed a SRM model in the MATLAB/Simulink environment. While an Asymmetric Half Bridge Converter (AHBC) is used for excitation in the motor mode operation, the problem of using the same converter during generator mode is vividly explained.

4 citations

Journal ArticleDOI
TL;DR: In this article, a geometry-based analytical model of the SRM drive system is presented and a prototype of microcontroller based SRM is constructed for validating the analysis and the results are reported.
Abstract: This paper presents analysis of Switched Reluctance Machine (SRM) using Geometry Based Analytical Model (GBAM), Finite Element Analysis (FEA) and Fourier Series Model (FSM) with curve fitting technique. Further a Transient Analysis (TA) technique is proposed to corroborate the analysis. The main aim of this paper is to give in depth procedure in developing a Geometry Based Analytical Model of Switched Reluctance Machine which is very accurate and simple. The GBAM is developed for the specifications obtained from the manufacturer and magnetizing characteristic of the material used for the construction. Precise values of the parameters like Magneto Motive Force (MMF), flux linkage, inductance and torque are obtained for various rotor positions taking into account the Fringing Effect (FE). The FEA model is developed using MagNet7.1.1 for the same machine geometry used in GBAM and the results are compared with GBAM. Further another analytical model called Fourier Series Model is developed to justify the accuracy of the results obtained by the methods GBAM and FEA model. A prototype of microcontroller based SRM drive system is constructed for validating the analysis and the results are reported.

3 citations


Cited by
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01 Jan 2016
TL;DR: Electronic control of switched reluctance machines helps people to read a good book with a cup of tea in the afternoon, instead they are facing with some harmful virus inside their desktop computer.
Abstract: Thank you for downloading electronic control of switched reluctance machines. Maybe you have knowledge that, people have search numerous times for their favorite novels like this electronic control of switched reluctance machines, but end up in malicious downloads. Rather than reading a good book with a cup of tea in the afternoon, instead they are facing with some harmful virus inside their desktop computer.

214 citations

Journal ArticleDOI
TL;DR: A comprehensive review on solar tracking systems and their potentials in solar energy applications is presented, which overviews the design parameters, construction, types and drive system techniques covering different usage application.
Abstract: This paper presents a comprehensive review on solar tracking systems and their potentials in solar energy applications. The paper overviews the design parameters, construction, types and drive system techniques covering different usage application. There are two main solar tracking systems types that depending on their movement degrees of freedoms are single axis solar tracking system and dual axis solar tracking system, which are addressed in the recent studies. The solar tracker drive systems encompassed five categories based on the tracking technologies, namely, active tracking, passive tracking, semi-passive tracking, manual tracking, and chronological tracking. The paper described the various designs and components of the tracking systems. There are 42.57% of the studies discussed and presented single axis tracking systems while 41.58% of these studies to the dual axes tracking systems. In the recent research studies, the most common solar tracker drive type was active tracker by 76.42% usage in applications while in the second most impact type is the chronological solar tracker by 7.55%. Furthermore, in the solar tracking techniques, Azimuth and altitude tracking achieved 16.67% in usage, Horizontal tracking by 16.67%, Azimuth tracking by 10%, and polar tracking by 4.44%.

183 citations

Journal ArticleDOI
TL;DR: In this article, a review has prioritized sustainability as a significant tool to look into various state-of-art developments in PV innovation process and arrived with the recommendation for its market size, effective and efficient future growth opportunities, ongoing trends, and forecast for the years 2018-2025.
Abstract: Solar photovoltaic technology has emerged with exceptionally high potential future energy contributor to a scale of multi-terawatt sustainability sector by mid-century 2050. Assuming the inception year 2018 and recent developments in the field of photovoltaics, significant penetration of various techno-commercial factors are still left for futuristic innovations. Extending the portfolio of PV based cleaner energy production, requires innovation process, detailed concept analysis, pilot study, and demonstration. The development strategies would overcome the barriers to development and advance the implementation process. The energy innovation system is never an easy process due to the complexity of technological success, public acceptance and environmental sensitivity, which affects the product supply chain. This review has prioritized sustainability as a significant tool to look into various state-of-art developments in PV innovation process and arrived with the recommendation for its market size, effective and efficient future growth opportunities, ongoing trends, and forecast for the years 2018–2025. Apart from core technology improvements, this multi-perspective review recommends for innovative policies adoption, substantial fall in energy cost, social acceptance, capacity building and collaborations for future energy establishment. Sustainability perspective as a significant thought suggests a brief snapshot of fifteen innovative solar energy-based solutions for sustainable development.

127 citations

Journal ArticleDOI
TL;DR: A detailed review of various converter topologies such as SEPIC (single-ended primary-inductance converter), boost, buck-boost and flyback which are used to achieve the desired voltage level on grid output are presented.
Abstract: Renewable energy generation has experienced rapid growth in the last few years, with close to $ 330 billion investment in 2017. To promote renewable energy generation, the European Union established an objective of achieving 20% renewables in the consumption by 2020. Compared to other renewabl e sources, solar power has reduced environmental impact. An MPPT (maximum power point tracking) controller is used to increase the energy gathered from a solar panel. Selection of appropriate converter is one of the challenge since that has an impact on behaviour of the PV (photovoltaic) system. In recent years, many converters have been reported in the literature. This paper presents a detailed review of various converter topologies such as SEPIC (single-ended primary-inductance converter), boost, buck-boost and flyback which are used to achieve the desired voltage level on grid output. The pros and cons of these converters are discussed. Review shows that interleaving and coupled inductor based topologies can offer advantages such as high efficiency and reduced switching loss. This study is not limited to reviewing topologies, rather discusses PV array configurations, advanced MPPT methods, advanced converters and comparisons in terms of hardware complexity, cost and efficiency. Finally, a summative analysis of topologies suitable for PV applications along with MPPT techniques are listed. This review can be employed for evaluating appropriate topology of converter in PV applications.

80 citations

Journal ArticleDOI
TL;DR: The results show that for the present case study, the fixed-tilt azimuth tracking technology leads to the minimum system cost with a suitable certainty under different LPSP values and results in the greatest match between the demanded and supplied power profiles.
Abstract: The main aim of this study is to evaluate the techno-economic role of the PV tracking technology in a hybrid photovoltaic-pump storage hydroelectric (PV-PSH) standalone power system. In this regard, a multi-objective optimization procedure is developed for the optimal design of a PV-PSH system and the developed procedure is separately implemented for the different types of PV tracking technologies such as horizontal and fixed-tilt panels (without any sun tracker), East-West oriented single-axis tracking, fixed-tilt azimuth tracking and dual-axis tracking systems. A coastal area in the south of Iran is considered as the case study; investment cost and loss of power supply probability (LPSP) are considered as the objective functions. Moreover, number of PV modules, turbine capacity, pipes diameters, and the volume, installation height and depth to diameter ratio of reservoir constitute the set of design variables and NSGAII is employed as the optimization algorithm. The results show that for the present case study, the fixed-tilt azimuth tracking technology leads to the minimum system cost with a suitable certainty under different LPSP values. Moreover, it results in the greatest match between the demanded and supplied power profiles. The results also illustrate that the appropriate selection of sun tracking technology in a hybrid PV-PSH system can lead to a savings of up to 18.2%. Finally, the economic superiority of the PV-PSH system over the common PV-battery system is investigated and proved for the case study.

71 citations