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Publications (4)1.52 Total impact

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    ABSTRACT: In some situations, utilities may try to “save” the fuse of a circuit following temporary faults by de-energizing the line with the fast operation of an upstream recloser before the fuse is damaged. This fuse-saving practice is accomplished through proper time coordination between a recloser and a fuse. However, the installation of distributed generation (DG) into distribution networks may affect this coordination due to additional fault current contributions from the distributed resources. This phenomenon of recloser-fuse miscoordination is investigated in this paper with the help of a typical network that employs fuse saving. The limitations of a recloser equipped with time and instantaneous overcurrent elements with respect to fuse savings, in the presence of DG, are discussed. An adaptive relaying strategy is proposed to ensure fuse savings in the new scenario even in the worst fault conditions. The simulation results obtained by adaptively changing relay settings in response to changing DG configurations confirm that the settings selected theoretically in accordance with the proposed strategy hold well in operation.
    IEEE Transactions on Power Delivery 04/2013; Volume: 28(Issue: 2):Page(s): 669 - 677. · 1.52 Impact Factor
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    ABSTRACT: The present field studies were undertaken to collect data on the distribution and status of the birds in the Khirthar Protected Areas Complex (KPAC). These took place for a period of six months from September, 2012 to March, 2013. The data were collected at 50 sites throughout the Complex and compiled. Seven different habitats were identified for the study of the birds of the area. A total of 207 species of birds belonging to 15 Orders and 38 Families alongwith their status were recorded. Among them, 08 species have been listed as threatened and 06 as near threatened as per IUCN Red List.The highest avian biodiversity was found at the wetland sites and at cropland/ villages, and the lowest in mountainous areas. From the conservation view point, highest number of threatened/ Near threatened species of birds were found at the Wetland Sites and next at Riparian/ Sandy/Plain areas.
    Canadian Journal of Pure and Applied Sciences. 01/2013; 7(3):2515-2532.
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    B. Hussain, S.M. Sharkh, S. Hussain
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    ABSTRACT: The increasing amount of distributed generation (DG) in distribution networks (DNs) is giving rise to power quality and protection coordination problems. Issues like voltage regulation, flicker, harmonics and loss of coordination between circuit breaker and fuse need to be addressed for integration of DG into DN. This paper discusses these issues with a special emphasis on protection coordination problems. A typical DN with DG is modeled and simulation results for impact of DG on protection system coordination are presented and discussed here. Some solutions are proposed to cope with these problems.
    Power Electronics Electrical Drives Automation and Motion (SPEEDAM), 2010 International Symposium on; 07/2010
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    ABSTRACT: An effective introduction of distributed generation (DG) into existing distribution networks (DNs) calls for a review of traditional power system protection concepts and strategies. New issues such as activeness of DNs and bidirectional power flow require new protection solutions. This paper discusses protection issues and challenges arising from the integration of DG into the grid. It presents and critically reviews traditional and state of the art protection strategies. Moreover, some alternate protection strategies are proposed and their merits and demerits are discussed.
    Developments in Power System Protection (DPSP 2010). Managing the Change, 10th IET International Conference on; 05/2010