Out-of-step Protection combining Three-impedance Element Model with the Equal Area Criterion

DOI

10.2991/ifeea-15.2016.4How to use a DOI?

Keywords

three-impedance element model, equal area criterion, out-of-step protection, PSCAD simulation

Abstract

This paper proposes a new procedure for out-of-step protection through the combination of a three-impedance element model with equal area criterion. The curve of the system is transferred into curve and then curve is applied to forecast whether the oscillation between the generator and the power system is out-of-step or stable. The forecasting results determine the operation of the out-of-step protection: If the oscillation is unstable, the signals will be sent during the first period of unstable oscillation, and then the number of sliding pole will be counted to achieve a delay action. Otherwise, no response will be made. A three-machine infinite bus system has been used to test the proposed method by simulation with PSCAD software. The simulations test the protection in a variety of faults within the system, including unstable and stable oscillation, loss of excitation and short-circuit faults. Simulation results confirm that this method can work effectively as a backup protection when faults such as loss of excitation and short-circuit fault are not promptly removed. Moreover, the simulations provide a reliable basis for the scheme and design of out-of-step protection in the power plant.

Copyright

© 2016, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Liang Yuan
AU  - Zhaorong Zhang
AU  - Chong Chen
PY  - 2016/01
DA  - 2016/01
TI  - Out-of-step Protection combining Three-impedance Element Model with the Equal Area Criterion
BT  - Proceedings of the 2015 2nd International Forum on Electrical Engineering and Automation (IFEEA 2015)
PB  - Atlantis Press
SP  - 18
EP  - 23
SN  - 2352-5401
UR  - https://doi.org/10.2991/ifeea-15.2016.4
DO  - 10.2991/ifeea-15.2016.4
ID  - Yuan2016/01
ER  -