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Current differential protection of double-circuit transmission lines in modal domain

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Abstract

In this paper, we present a new approach to protection of double-circuit transmission lines using modal transformation. The current differential principle is applied in the modal domain, and the relay characteristics are plotted in the alpha plane for numerical differential protection applications. Synchronized voltages and currents from both the ends are transformed to modal values. The transmission lines are modeled as equivalent \(\pi \) model in modal domain, and line charging current is compensated. Electromagnetic transient program EMTP-ATP is used to simulate the double-circuit transmission systems, and the algorithm is implemented in MATLAB. The extensive case studies demonstrate the utility and the superiority of the proposed current differential scheme.

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  1. Electrical Engineering Department, College of Engineering, Pune, India

    Snehal Unde & Sanjay Dambhare

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  1. Snehal Unde
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  2. Sanjay Dambhare
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Correspondence to Snehal Unde.

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Unde, S., Dambhare, S. Current differential protection of double-circuit transmission lines in modal domain. Electr Eng 102, 2401–2411 (2020). https://doi.org/10.1007/s00202-020-01038-y

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