Short-circuit current calculation model for symmetrical two-core phase-shifting transformer

The symmetrical two-core phase-shifting transformer (ST-PST) has a flexible control role for line power flow, and its operating characteristics are closely related to the operating state of the grid. Since the connection method of ST-PST is quite different from that of conventional transformers, the...

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Main Authors: Liu, Wei, Tu, Qingrui, Chen, Zhensheng, Li, Xiaohua, Luo, Yijie, Jiao, Shaolin, Wang, Feng
Format: Conference Proceeding
Language:English
Subjects:
Analytical models
asymmetric fault
Computational modeling
derivative matrix
Mathematical models
phase component method
Short-circuit currents
Simulation
Symmetric matrices
symmetrical two-core phase shift transformer
Transformers
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creator Liu, Wei
Tu, Qingrui
Chen, Zhensheng
Li, Xiaohua
Luo, Yijie
Jiao, Shaolin
Wang, Feng
description The symmetrical two-core phase-shifting transformer (ST-PST) has a flexible control role for line power flow, and its operating characteristics are closely related to the operating state of the grid. Since the connection method of ST-PST is quite different from that of conventional transformers, the analysis method of conventional transformers is not fully applicable. To address the problem that the existing mathematical model of ST-PST is derived under symmetric operating conditions and does not reflect the ST-PST operating conditions under asymmetric conditions, this paper derives the node admittance matrix of the ST-PST based on the application of the phase component method and establishes a mathematical model to accommodate both symmetric and asymmetric fault operating conditions. The feasibility and accuracy of the phase-component method are verified by comparing the calculation with the EMTDC/PSCAD simulation results through the Matlab program example.
doi_str_mv 10.1109/POWERCON53785.2021.9697685
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subjects Analytical models
asymmetric fault
Computational modeling
derivative matrix
Mathematical models
phase component method
Short-circuit currents
Simulation
Symmetric matrices
symmetrical two-core phase shift transformer
Transformers
title Short-circuit current calculation model for symmetrical two-core phase-shifting transformer
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