A new algorithm for avoiding maloperation of transformer differential protection
A new algorithm for avoiding maloperation of transformer differential protection
- Author(s): J. Krstivojevic and M. Djuric
- DOI: 10.1049/cp.2016.1103
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- Author(s): J. Krstivojevic and M. Djuric Source: Mediterranean Conference on Power Generation, Transmission, Distribution and Energy Conversion (MedPower 2016), 2016 page ()
- Conference: Mediterranean Conference on Power Generation, Transmission, Distribution and Energy Conversion (MedPower 2016)
- DOI: 10.1049/cp.2016.1103
- ISBN: 978-1-78561-406-4
- Location: Belgrade, Serbia
- Conference date: 6-9 Nov. 2016
- Format: PDF
A new algorithm for avoiding maloperation of transformer differential protection during external faults caused by current transformer (CT) saturation is presented. The algorithm is based on the time-domain phase comparison of the primary and secondary currents of power transformer (PT). The algorithm serves for identification of faults which occurred outside the protected zone. The presented algorithm could be used as an additional criterion for operation of transformer differential protection. Its application would greatly improve the correct operation of differential protection and so increase its security. The required input signals for testing the algorithm have been generated by computer simulations. The paper presents the algorithm and results of the performed tests.
Inspec keywords: time-domain analysis; current transformers; power transformer protection
Subjects: Transformers and reactors
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