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ABSTRACT: In this paper identification of origin of harmonic source in deregulated power sector has been carried out. Critical impedance method (CIM) for detection of harmonic disturbances caused between utility and source side has already been reported in literature. The method is based on direction of reactive power flow in the power system when there is the presence of harmonic load. Taking the CIM as the base method harmonic sources are identified in deregulated power sector. Due to unavailability of practical data simulation approach has been adopted. A five bus system model with two Generation ompanies (GENCOS) has been simulated for power transfer from GENCO to the considered five bus system. Harmonic current is injected into the system by using a three phase diode rectifier. The results obtainedusing the CIM clearly identifies whether the harmonic source is present in GENCO side or the load side.
International Journal of Engineering Science and Technology. 01/2011;
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IEEE Electrical Insulation Magazine 06/2008; · 1.33 Impact Factor
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ABSTRACT: Sweep frequency response analysis (SFRA) is an established tool for determining the core deformations, bulk winding movement relative to each other, open circuits and short circuit turns, residual magnetism, deformation within the main transformer winding, axial shift of winding etc. This test is carried out on the transformer without actual opening it and is an off line test. This paper explains the fundamental studies of SFRA measurement on basic electrical circuits, which can be extended for studying the mechanical integrity of a transformer after short circuit fault, transportation etc.
Power Engineering Society General Meeting, 2007. IEEE; 07/2007
