The following information was submitted:
Transactions: WSEAS TRANSACTIONS ON POWER SYSTEMS
Transactions ID Number: 53-493
Full Name: Santosh Kumar
Position: Research Director
Age: ON
Sex: Male
Address: CG Global R&D Centre, Crompton Greaves Ltd, Kanjur Marg East, Mumbai, Maharashtra
Country: INDIA
Tel: 9892609845
Tel prefix: +91
Fax: +912267558800
E-mail address: santtosh@gmail.com
Other E-mails: santosh.annadurai@cgglobal.com
Title of the Paper: high frequency modeling of two limb series loop winding for partial discharge localization
Authors as they appear in the Paper: Santosh Kumar Annadurai, Ramprakash Gupta, Udayakumar K
Email addresses of all the authors: santosh.annadurai@cgglobal.com, ramprakash.gupta@cgglobal.com, uday@annauniv.edu
Number of paper pages: 10
Abstract: Partial discharge (PD) measurement is widely accepted as a quality control test to study and detect the incipient insulation faults in power system equipments. This paper describes the study of partial discharge propagation behavior in a 6kV / 60kVA two limb series limb type winding with six accessible taps. Using the design parameters of the winding the high frequency equivalent circuit is derived by analytical methods. The high frequency equivalent circuit of the winding consists of series inductance (L), capacitance (Cs), and ground capacitance (Cg) of the winding [1]. The equivalent circuit is simulated in PSPICE and standard PD signal is injected at various locations (6 locations). The response signals at start and end terminals of circuit are captured and analyzed in the frequency domain & the location is estimated by the formula using the series resonance frequency methodology [2]. Experiments are conducted by injecting PD pulses into the winding at various !
tap locations using pulse generator, the traveled signals at the line and neutral end terminals are captured using High frequency current transformer (HFCT). The frequency spectra of the measured signals at line and neutral end for various tap locations along the winding height are analyzed and similarly the PD location is estimated, compared and validated with the location estimated by the simulated transformer winding equivalent circuit model in PSPICE. The effect of PD location in transformer winding on the propagation of partial discharge pulses and its effect on the frequency response and the accuracy of the PD location estimation are illustrated.
Keywords: Partial discharges, high frequency modeling, Partial discharge propagation, HFCT, Partial discharge localization.
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