Indian Institute of Technology Bhubaneswar

About: Indian Institute of Technology Bhubaneswar is a education organization based out in Bhubaneswar, India. It is known for research contribution in the topics: Large Hadron Collider & Higgs boson. The organization has 1185 authors who have published 3132 publications receiving 48832 citations.

High impedance fault detection in microgrid using maximal overlapping discrete wavelet transform and decision tree

Abstract: The paper presents a high impedance fault (HIF) detection scheme for microgrid using maximal overlapping discrete wavelet transform (MODWT) and decision tree (DT). The small, nonlinear, random and widely varying fault current of HIF makes the over-current relay insensitive. Thus, time-frequency information is required to distinguish HIF from no-fault event. The proposed work start with retrieving the fault current which is pre-process through (decompose using) MODWT to get the details and approximation coefficient. Further, some statistical features are estimated using the details and approximation coefficient. The features extracted are used to train decision tree (DT) for accurate classification of HIF from no-fault. The proposed scheme is tested for HIFs detection in microgrid for different operating conditions. The test results show that the proposed scheme provides an effective protection measure against HIFs for safe and secured operation of microgrid.

Characterization of granular lateritic soils as pavement material

Abstract: Due to the scarcity of crushed stone aggregates, the feasibility of using locally available granular materials and marginal aggregates as pavement material is being explored in most part of the world. Granular lateritic soil (locally known as Moorum) has been used as a sub-base material for road construction in India. The characteristics of lateritic soils vary considerably based on their mineralogical composition, microstructure of soil particles, climate, parent rock and degree of laterisation. Therefore a detailed characterization of granular lateritic soils available locally in India is very much essential for its use as pavement material. In recent years, there is a sway towards mechanistic design of pavements, which requires the mechanical properties of all the materials being used in the pavement layers. Material property in terms of elastic modulus or resilient modulus and Poisson’s ratio are two major input parameters for mechanistic design. Granular materials show stress hardening characteristics and behave non-linearly under repeated loads. Considering the requirement of characterization of granular lateritic soils in India, a comprehensive laboratory study was taken up. This paper presents the results of various tests conducted on these soils collected from the eastern part of the country and the correlations established between different parameters for easier determination of complex soil properties.

Impedimetric humidity sensor based on α-Fe2O3 nanoparticles

Abstract: Humidity sensing characteristics of thick-film sensors based on α-Fe2O3 nanoparticles synthesized by hydrothermal method have been reported. The as-synthesized α-Fe2O3 nanoparticles were characterized by using XRD, Raman spectroscopy, TEM and HRTEM. Our TEM result depicts that the size of α-Fe2O3 nanoparticles were in the range of 20–30 nm with highly crystalline nature. For humidity sensing experiment, the sensitivity of our α-Fe2O3 nanoparticles-based sensor device was found to be ∼99% and the fastest response times were noted, which indicate that the α-Fe2O3 nanoparticle-based humidity sensor device has more future prospects and demand. The humidity sensing properties of α-Fe2O3 nanoparticles seem to be associated to the sorption sites for the water molecules at the nanoparticles interfaces.