Faculty Publications
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Item A heuristic approach to distributed generation source allocation for electrical power distribution systems(Iran University of Science and Technology, 2010) Manjunatha Sharma, K.; Vittal, K.P.The recent trends in electrical power distribution system operation and management are aimed at improving system conditions in order to render good service to the customer. The reforms in distribution sector have given major scope for employment of distributed generation (DG) resources which will boost the system performance. This paper proposes a heuristic technique for allocation of distribution generation source in a distribution system. The allocation is determined based on overall improvement in network performance parameters like reduction in system losses, improvement in voltage stability, improvement in voltage profile. The proposed Network Performance Enhancement Index (NPEI) along with the heuristic rules facilitate determination of feasible location and corresponding capacity of DG source. The developed approach is tested with different test systems to ascertain its effectiveness.Item Assessment of distributed generation source impact on electrical distribution system performance(2010) Sharma, M.; Vittal, K.P.The recent trends in electrical power distribution system operation and management are aimed at improving system conditions in order to render good service to the customer. The reforms in distribution sector have given major scope for employment of distributed generation (DG) resources which will boost the system performance. This paper proposes a heuristic technique for allocation of distribution generation source in a distribution system. The allocation is determined based on overall improvement in network performance parameters like reduction in system losses, improvement in voltage stability, improvement in voltage profile. The proposed Network Performance Enhancement Index (NPEI) along with the heuristic rules facilitate determination of feasible location and corresponding capacity of DG source. A Priority list is prepared with decreasing values of NPEI so that the designer can select most feasible location. The developed approach is tested with different test systems to ascertain its effectiveness. © 2010 AECE.Item Performance enhancement of electrical distribution systems with multiple distributed generation sources(2010) Krishnamurthy, M.; Vittal, K.P.The recent trends in electrical power distribution system operation and management are aimed at improving system conditions in order to render good service to the customer. Reforms in the distribution sector have given major scope for employment of distributed generation (DG) resources which will boost system performance. This article proposes a heuristic technique for allocation of multiple distribution generation sources in a distribution system. The allocation is determined based on overall improvement in network performance parameters like reduction in system losses, improvement in voltage stability, improvement in voltage profile. The hybrid of Genetic Algorithm with the proposed Network Performance Enhancement Index (NPEI) along with the heuristic rules facilitates determination of feasible location for insertion of DG sources. A priority list is prepared with decreasing values of NPEI so that the designer can select most feasible locations. The developed approach is tested with different test systems to ascertain its effectiveness.Item Distributed load flow analysis using graph theory(2011) Sharma, D.P.; Chaturvedi, A.; Purohit, G.; Shivarudraswamy, R.In today scenario, to meet enhanced demand imposed by domestic, commercial and industrial consumers, various operational & control activities of Radial Distribution Network (RDN) requires a focused attention. Irrespective of sub-domains research aspects of RDN like network reconfiguration, reactive power compensation and economic load scheduling etc, network performance parameters are usually estimated by an iterative process and is commonly known as load (power) flow algorithm. In this paper, a simple mechanism is presented to implement the load flow analysis (LFA) algorithm. The reported algorithm utilizes graph theory principles and is tested on a 69- bus RDN.Item Distributed load flow analysis using graph theory(2011) Sharma, D.P.; Chaturvedi, A.; Purohit, G.; Shivarudraswamy, R.In today scenario, to meet enhanced demand imposed by domestic, commercial and industrial consumers, various operational & control activities of Radial Distribution Network (RDN) requires a focused attention. Irrespective of sub-domains research aspects of RDN like network reconfiguration, reactive power compensation and economic load scheduling etc, network performance parameters are usually estimated by an iterative process and is commonly known as load (power) flow algorithm. In this paper, a simple mechanism is presented to implement the load flow analysis (LFA) algorithm. The reported algorithm utilizes graph theory principles and is tested on a 69- bus RDN.Item Modified QUIC protocol for improved network performance and comparison with QUIC and TCP(Inderscience Publishers, 2019) Kharat, P.; Kulkarni, M.Congestion control mechanism is solely responsible for maintaining the performance of streaming data. However, when there is no congestion, a regular delivery window update is followed as a step by step process. The process can be improved by individual window update along with acknowledgement (ACK) as feedback to the server even in the absence of congestion. To achieve maximum throughput and minimum delay, we have suggested modification in the existing handshaking mechanism of quick UDP internet connections (QUIC) protocol. This paper presents an investigation of QUIC protocol performance and proposes a modified QUIC (ModQUIC): a modification in existing handshaking mechanism of QUIC to reduce control overhead. Chromium server-client model testbed setup results, show that the proposed technique gives stable output and improves performance in terms of overall throughput and delay over QUIC and transmission control protocol (TCP). Performance has been tested for limited (2 Mbps) and sufficient (10 Mbps) link bandwidth in presence of loss. The validation of results has been carried out with the help of linear regression model. The result show a throughput improvement of 35.66% and 51.93% over QUIC and TCP respectively and also the delay is reduced by 3% to 5% over QUIC and TCP. © © 2019 Inderscience Enterprises Ltd.Item Modified QUIC protocol with congestion control for improved network performance(John Wiley and Sons Inc, 2021) Kharat, P.; Kulkarni, M.In the networks, a transport layer is responsible for reliable data with guaranteed Quality of Service. A Modified-QUIC protocol provides improved throughput and reduced latency of the network. This work proposes a modification in handshaking mechanism for QUIC protocol to minimize overhead due to control signals and time required to update the congestion-window size. This modification fine-tunes the window update mechanism with the acknowledgment frame, which results in a smooth variation in the congestion-window size. This leads to the control congestion by regulating traffic in the network. In the proposed mechanism, unnecessary time out events are avoided by updating the congestion-window on receipt of the acknowledgment frame. This work has been carried out using two different testbed setups to verify the transport layer and a browser network performance. It has been observed that a Modified-QUIC protocol is easy to deploy, improves the throughput and data rate by 35% and 3.43%, respectively, over the QUIC protocol. The average fairness index is increased with a file size and for the long live traffic. © 2021 The Authors. IET Communications published by John Wiley & Sons Ltd on behalf of The Institution of Engineering and TechnologyItem Multi-Dimensional Assessment of Submarine Groundwater Discharge and Seawater Intrusion Between Mangaluru and Udupi Coast of Karnataka, India(Springer, 2025) Sunilkumar, P.S.; Ramesh, H.; Wadde, S.Submarine Groundwater Discharge (SGD) and Seawater Intrusion (SWI) are critical, interlinked processes impacting coastal groundwater sustainability. Increasing population density, rapid urbanization, and unsustainable agricultural practices contribute to groundwater stress along coastal regions, especially from the Mangalore and Udupi coasts of Karnataka, India. This study investigates SGD and SWI dynamics using groundwater level (GWL) fluctuation, in-situ water quality parameters assessment, and Sea Surface Temperature (SST) anomalies. The Historical and in-situ GWL data has been used to locate possible SGD and SWI-prone areas. The same has been validated with the key indicators Salinity, Electrical Conductivity (EC), and Total Dissolved Solids (TDS) of Groundwater, Porewater, and Seawater samples, and also from thermal image-derived SST. The integrated analysis identified zones of SGD and SWI. Surathkal Hejamadi, Padubidri, Tenka, Bada, kaiparjal, and Mattu, emerged as potential SGD areas, with GWL > 7.5 m above MSL, salinity < 1.5 PPT, EC < 1000 µS/cm, and TDS < 1500 mg/L. SWI-prone locations, such as Sasihithlu, displayed elevated TDS (up to 6770 mg/L) and GWL < 2.5 m above MSL. Malpe Beach exhibited clear SGD indicators with TDS < 400 mg/L and groundwater flow directed seaward. EC values varied from 200 µS/cm in SGD regions to over 2000 µS/cm in SWI zones, while salinity peaked at 10 PPT in Padubidri. SST anomalies validated SGD presence at Hejamadi and Surathkal, supported by hydrological and hydrochemical data. This comprehensive approach offers an effective methodology for delineating SGD and SWI zones, contributing to sustainable coastal aquifer management. © The Institution of Engineers (India) 2025.Item Rapid Air Quality Assessment and Modelling of an Educational Institute Located in a Coastal Region near National Highway(Springer, 2025) Charly, T.; Joshi, L.; Manu, B.; Mulangi, R.H.The study investigated the variation in air pollutant concentrations at different sampling points within a higher educational institution located near a coastal region and a national highway in India. From January 2023 to March 2023, air pollutants including Total Suspended Particulate Matter (TSPM), Nitrogen Dioxide (NO2), and Sulphur Dioxide (SO2) were sampled and analyzed using standard procedures at three distinct locations: the Main Entrance Gate (S1), Administrative Building (S2), and Sports Complex (S3) of the National Institute of Technology, Karnataka (NITK). A simple box model was employed to estimate the potential impact of emissions on atmospheric concentration. Spearman correlation coefficients were calculated to explore relationships between air pollutants and meteorological parameters. The study revealed higher concentrations of gaseous pollutants and TSPM during the winter season, with the highest levels observed at the main entrance facing National Highway 66. Various factors such as meteorological variations, construction activities, local traffic conditions, and fuel consumption were identified as potential contributors to pollutant concentration fluctuations. Car, jeep, van, and motor vehicle traffic predominated, comprising 89.96% of the observed vehicles. Notably, a significant correlation was found between NO2 levels and temperature at the sampling sites. The investigation underscores the environmental challenges faced by educational institutions, highlighting the imperative for sustainable practices and pollution control measures within campus boundaries. This study contributes valuable insights into the complex interplay between air pollutants, meteorological factors, and human activities, emphasizing the importance of proactive environmental management strategies in educational settings. © The Author(s) under exclusive licence to Institute of Earth Environment, Chinese Academy Sciences 2024.