Audur-A platform for synchrophasor-based power system wide-area control system implementation
SOFTWAREX
Authors: Vanfretti, L.; Jonsdottir, G. M.; Almas, M. S.; Rebello, E.; Firouzi, S. R.; Baudette, M.
Abstract
Electrical power systems continue to grow in size and complexity, resulting in new challenges to control and stabilize them. Measurement based Wide-Area Control Systems (WACS) have been extensively researched in the last decade to enhance power system stability. However, very few WACS implementations in the field have been carried out so far. To bridge this gap the LabVIEW package, Audur, presented in this paper, allows users to easily implement their custom WACS design on a National Instruments hardware platform. The hardware controller receives synchrophasor measurements compliant with the IEEE C37.118.2 protocol and generates a control signal that, in principle, can be configured as a supplementary control system to drive any active component in the power system. (c) 2018 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
Occurrence of Nummulitic coralline limestone from offshore Palar Basin, Bay of Bengal, India
MARINE GEORESOURCES & GEOTECHNOLOGY
Authors: Ramesh, S.; Murthy, K. N. V. V.; Hussain, S. M.; Ramasamy, S.; Ramadass, G. A.
Abstract
Palar basin is located between Pennar and Cauvery sedimentary basins of East coast of India in Bay of Bengal, northeast Indian Ocean. Sea floor drill (Wire-line Autonomous Coring System - WACS) with operational capability of up to 3000 m water depth was developed to collect long cores from deep sea floor for geotechnical and ocean resource assessment studies. During the drilling operation it encountered Nummulitic coralline limestone of Lower Eocene age at 18 meters below the seafloor (mbsf) at 850 m water depth indicating carbonated platform presence for the first time at the study region. Bathymetry contour from Naval Hydrography Chart and General Bathymetric Chart of the Oceans (GEBCO) has revealed the presence of shallow mounds from 50 to 200 m depth closure contour near the sampling site at 850 m water depth which might be a submerged carbonated structure. Since, Nummulites are shallow water dwelling fauna (<20 m depth) but its occurrence at 18 mbsf in 850 m water depth is recorded because of the advancement in technology tool for long core sampling by means of sea floor drill.
COA
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