Motilal Nehru National Institute of Technology Allahabad

About: Motilal Nehru National Institute of Technology Allahabad is a education organization based out in Allahabad, Uttar Pradesh, India. It is known for research contribution in the topics: Control theory & Electric power system. The organization has 2475 authors who have published 5067 publications receiving 61891 citations. The organization is also known as: NIT Allahabad & Motilal Nehru Regional Engineering College.

A comparative analysis of non-isolated bi-directional dc-dc converters

Abstract: In this paper, five non-isolated bi-directional dc-dc converter topologies are analylized, demonstrated and design for the purpose of the renewable energy generation plants. These converters are: non-isolated bi-directional buck converter (NBBC), non-isolated bi-directional boost converter (NBOC), non-isolated bi-directional fly back converter (NBFC), non-isolated bi-directional CUK converter (NBCC) and non-isolated bi-directional SEPIC converter (NBSC).In the renewable energy sources like PV and wind, wide input voltage variation due to the temperature and environmental conditions. Besides, production of renewable has been very less since it came in the field of power generation. Non-isolated dc-dc converters are suitable for low voltage range and it's fit for the dc micro grid voltage level. Moreover, either load side or source side get sporadic current in the primitive dc-dc converters and output voltage is negative with respect to the ground in CUK converter. Aforementioned problems are rectified by the non-isolated bi-directional SEPIC converter (NBSC). Items such as ideal efficiency, ripple factor of voltage, ripple factor of current, size and sophistication are calculated for them. On the other hand, their output current and voltages are obtained by the simulation with PSCAD software. A comprehensive comparison is done among these converter topologies on the basics of above mentioned items. It is found that non-isolated bi-directional SEPIC converter is best suited for the non-conventional energy generation plants.

3D geographical routing protocols in wireless ad hoc and sensor networks: an overview

Abstract: Geographical routing is a prominent area of research in wireless networks where route establishment is based on known locations of wireless nodes. The location may be an exact physical location or virtual location. Many geographical routing protocols based on greedy and face routing approach have been designed for 2D networks, but these protocols may not be suitable in 3D environment like hill area, airborne networks, underground networks, underwater networks and so forth. The objective of this paper is to provide the research issues and challenges of geographical routing in the three-dimensional surface. These routing techniques suffer from many problems like energy efficiency, localization, mobility, load balancing, routing stretch, void node problems, etc. These issues have been addressed in the literature survey. In this paper, the recent research papers related to geographical routing have been discussed, but the main focus is on 3D geographic routing techniques, issues and challenges.