Novel Differential Protection Approach of UHV AC Transmission Lines Based on Tellegen's Quasi-Power Theorem

Liu, Shiming, Wang, Bo, Zhao, Yongsen, Zhang, LL and Jiang, L ORCID: 0000-0001-6531-2791 (2022) Novel Differential Protection Approach of UHV AC Transmission Lines Based on Tellegen's Quasi-Power Theorem. IEEE TRANSACTIONS ON POWER DELIVERY, 37 (2). pp. 1264-1274.

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2021 IEEE Power Delivery Novel Differential Protection Approach of UHV AC Transmission Lines Based on Tellegen’s Quasi-Power Theorem.pdf - Author Accepted Manuscript
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Official URL: http://dx.doi.org/10.1109/tpwrd.2021.3082855

Abstract

When current differential protection is applied to an AC transmission line, synchronous sampling at the two ends is required. The use of GPS synchronization increases the difficulty and cost of project implementation while the use of 'ping-pong' synchronization requires that the communication channel has equal transmission and reception delay. To overcome the impact of these issues, power differential protection has been proposed. However, power differential protection cannot fully identify the fault zone for solid single-line-to-ground fault. This paper proposes a novel differential protection approach based on the Tellegen's quasi-power theorem. The approach retains the advantages of current differential protection. Meanwhile, it is not affected by load condition and distributed capacitance. This paper also proposes a time synchronization method based on the Tellegen's quasi-power theorem to calculate and correct the time synchronization error. Therefore, the proposed pilot protection has a high synchronization accuracy and has no requirement on the communication delay. In this paper, different simulation models are established by using MATLAB/Simulink and PSCAD and extensive simulation studies verify the effectiveness of the proposed protection approach and time synchronization method.

Item Type:	Article
Uncontrolled Keywords:	Circuit faults, Power transmission lines, Synchronization, Impedance, Transmission line measurements, Equivalent circuits, Relays, Tellegen's quasi-power theorem, differential protection, ultra-high voltage, protection relay
Divisions:	Faculty of Science and Engineering > School of Electrical Engineering, Electronics and Computer Science
Depositing User:	Symplectic Admin
Date Deposited:	11 May 2021 08:27
Last Modified:	15 Mar 2024 04:52
DOI:	10.1109/TPWRD.2021.3082855
Related URLs:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3121434