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Research on transmission line model based on phase‐mode transformation in HVDC system
Author(s) -
Li Xiaodong,
Xu Zheng,
Lai Qiuju,
Zhang Zheren
Publication year - 2020
Publication title -
ieej transactions on electrical and electronic engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.254
H-Index - 30
eISSN - 1931-4981
pISSN - 1931-4973
DOI - 10.1002/tee.23026
Subject(s) - rectifier (neural networks) , harmonic , transmission line , admittance , converters , transmission system , three phase , line (geometry) , inverter , voltage , voltage source , high voltage direct current , transformation (genetics) , electric power transmission , admittance parameters , electronic engineering , control theory (sociology) , engineering , transmission (telecommunications) , electrical engineering , direct current , computer science , physics , mathematics , electrical impedance , acoustics , artificial intelligence , chemistry , stochastic neural network , recurrent neural network , biochemistry , geometry , control (management) , machine learning , artificial neural network , gene
For a high‐voltage DC (HVDC) transmission system, this paper describes an improved algorithm for the coupled multi‐phase transmission line model and complete procedures for the calculation of the DC‐side harmonic currents. First, based on the phase‐mode transformation, an improved coupled multi‐phase transmission line model is proposed. In other words, the transmission line is represented as a nodal admittance matrix form, considering computational accuracy and efficiency. In addition, when calculating the DC‐side harmonic currents, the line‐commutated converters at the rectifier side and the inverter side are equivalent to the three‐pulse harmonic voltage source models. Second, based on the DC‐side equivalent models mentioned previously and the nodal voltage analysis method, an analytical method and complete procedures for the calculation of the DC‐side harmonic currents in the HVDC systems, namely, the equivalent disturbing current, are described. Finally, a case study is carried out on a 4000 MW/±800 kV HVDC system. In the same condition, the analytical results are basically consistent with the simulation results of PSCAD/EMTDC, thus proving the accuracy of the proposed model. © 2019 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.