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Chakrasali R.L.,Alagappa Chettiar College of Engineering And Technology | Nagaraja H.N.,Angadi Institute of Technology | Sheelavant V.R.,Alagappa Chettiar College of Engineering And Technology | Vijay Murthy H.,Alagappa Chettiar College of Engineering And Technology | Shalavadi B.S.,Alagappa Chettiar College of Engineering And Technology
International Energy Journal | Year: 2012

The demand for electrical power is increasing constantly for several applications due to its flexibility and efficiency. The utilities are unable to cope up with this requirement from the existing captive generation using conventional sources. The recent liberalization policy encourages exploring Independent Power Production (IPP) avenues and use of renewable energy sources. Hence attention must be turned to generate power from locally available resources like biogas, solar, wind, biodiesel, micro hydro etc. The power available is fluctuating when all the above are implemented as standalone system. But the integrated operation of all these sources leads to a reliable, robust and cost effective system to provide sustainable power. The paper discusses the task involved in design, implementation of standalone sy stems and integration of the renewable energy sources. The design of power electronic circuitry for superior and trouble free performance is a challenging engineering issue. The simulation study of standalone hybrid grid is carried out to confirm the integration of the sources and is validated by the simulation results.


Chakrasali R.L.,Alagappa Chettiar College of Engineering And Technology | Sheelavant V.R.,Alagappa Chettiar College of Engineering And Technology | Nagaraja H.N.,Angadi Institute of Technology
International Journal of Power Electronics and Drive Systems | Year: 2011

Polyphase induction motor, when started from rest with full voltage impressed, the starting current is 5 to 8 or more times the rated current. The large line current drawn by such a motor is objectionable because of the possible sharp drop in voltage of the supply circuit and undesired effects upon other connected loads/devices. Accordingly it is customary to start such motors at reduced voltage by using auto transformers, star delta starters etc. This paper deals with a new approach to start poly phase induction motors without using any primary voltage compensators thereby limiting the inrush of starting current. The rotor of the motor is driven at suitable speed in the specified direction of rotation by using crank driving mechanism. Then te rated voltage is applied to the motor. This is enunciated using a case study on a 3- phase, 5hp, NGEF make motor with oscillographic records obtained from the experimentation and is compared with the various starting techniques.


Chakrasali R.L.,Alagappa Chettiar College of Engineering And Technology | Shalavadi B.S.,Alagappa Chettiar College of Engineering And Technology | Nagaraja H.N.,Angadi Institute of Technology
Renewable and Sustainable Energy Reviews | Year: 2011

The paper discusses the need of renewable energy sources. A case study has been carried out to study the technical state of art, reasons for the plant becoming non-operative, revival opportunities with justification and finally comes out with recommendations to revive on the basis of comprehensive survey conducted in the village. The case study is carried out at Nayakana Hulikatti village in Dharwad district that was developed by IEI (International Energy Initiative) in 1995-96 in co-ordination with rotary club and the plant was functional for few years. The paper also highlights the need of educating consumers to involve in power generation using locally available renewable resources for their power requirement. © 2011 Elsevier Ltd. All rights reserved.


Chakrasali R.L.,Alagappa Chettiar College of Engineering And Technology | Sheelavant V.R.,Alagappa Chettiar College of Engineering And Technology | Nagaraja H.N.,Angadi Institute of Technology
Renewable and Sustainable Energy Reviews | Year: 2013

The cost and performance of PV plants goes with the module under consideration. However the electrical parameters of the modules vary from those provided by the manufacturer with the ageing of the module. Therefore, the behavior of the mathematical model of a PV module cannot match the real operating conditions. There are papers having proposed an improved model of a PV module that makes use only parameters provided by manufacturer's datasheets without requiring the use of any numerical methods. This paper aims to interpret by using one of the available models represented as Norton's equivalent circuit which is a simple and approximate model. Norton's circuit model representing the module helps knowing the behavior of solar module. The study and performance of this model is compared with that of the existing model using Matlab and the results are matching to the greater extent. The results obtained for both the models are validated by conducting series of experiments on a physical module. Thus, the work signifies yet another model for a PV module to evaluate the performance parameters © 2013 Elsevier Ltd.

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