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A real-time DSP based quadrilateral relay for distance protection of 25 kV AC traction overhead equipment

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5 Author(s)
Shenoy, J.U. ; Dept. of Electr. Eng., Indian Inst. of Sci., Bangalore, India ; Sheshadri, K.G. ; Parthasarathy, K. ; Khincha, H.P.
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This paper presents the design, implementation and testing of a single-phase distance relaying scheme for 25 kV 50 Hz AC traction system using a Texas instruments TMS320C50 digital signal processor (DSP). The three-phase system with substations, track section with rectifier-fed DC locomotives and a detailed traction load are modeled using power system block set (PSB)/SIMULINK software package. The model has been used to study the effect of loading and fault conditions in 25 kV AC traction. The relay characteristic proposed is a combination of two quadrilaterals in the X-R plane in which resistance and reactance reaches are independently controllable. The algorithms, hardware and software are also briefly described.

Published in:

Power System Technology, 2004. PowerCon 2004. 2004 International Conference on  (Volume:2 )

Date of Conference:

21-24 Nov. 2004