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Strengths and limitations of a new phasor estimation technique to reduce CCVT impact in distance protection by E. Pajuelo; G. Ramakrishna; M.S. Sachdev is a Engineering article available to read on EtoBox.

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method a b s t r a c t This paper evaluates the performance of a new least squares approach that improves the accuracy and speed of convergence of the voltage phasors estimated during CCVT transient conditions. A justification of the validity of the linear mathematical model for the CCVT used is provided together with a short study about the risk of transient ferroresonance. Also, a discussion is presented about operating times of numerical distance relays and the importance of the new phasor estimation considered. The methodology followed to achieve a realistic evaluation in a variety of scenarios is presented. The results show the improvements achievable in most conditions, but also highlight an example scenario where the new method has limitations.

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Author

E. Pajuelo; G. Ramakrishna; M.S. Sachdev

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0378-7796)

Published

2010

Language

EN

Field

Engineering (Physical Sciences)