Study on Characteristic Parameters of a New Converter Transformer for HVDC Systems

Different from the traditional converter transformer and ac passive filtering method, this paper presents a new converter transformer and a corresponding inductive filtering method for HVDC systems. Based on this, characteristic parameters of the new converter transformer are studied in detail by th...

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Bibliographic Details
Published in:IEEE transactions on power delivery 2009-10, Vol.24 (4), p.2125-2131
Main Authors: Yong Li, Longfu Luo, Rehtanz, C., Nakamura, K., Jiazhu Xu, Fusheng Liu
Format: Article
Language:English
Subjects:
Analytical models
Applied sciences
Capacitors. Resistors. Filters
Converter transformer
Converters
Direct current networks
Electrical engineering. Electrical power engineering
Electrical power engineering
Exact sciences and technology
Filtering
Filtration
high-voltage direct current (HVDC)
HVDC transmission
Impedance
inductive filtering
Mathematical analysis
Passive filters
Power harmonic filters
Power networks and lines
Power system economics
Power system harmonics
rated capacity
Reactive power
short-circuit impedance
Simulation
Theory. Simulation
Transformers
Transformers and inductors
Various equipment and components
Voltage
Wiring
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Summary:Different from the traditional converter transformer and ac passive filtering method, this paper presents a new converter transformer and a corresponding inductive filtering method for HVDC systems. Based on this, characteristic parameters of the new converter transformer are studied in detail by theoretical analysis, simulation, calculation, and experimental verification. By deducing voltage relation, the constraint condition of the turn ratio is obtained, which can satisfy the demand of a 12-pulse converter in HVDC systems. By deducing current relations, the characteristics of the fundamental and the harmonic currents in the winding are obtained. According to the established operation equations, the simple but practical calculation methods for the short-circuit impedance and the rated capacity are proposed. Then, the change characteristic of the short-circuit impedance is analyzed and calculated. The detailed simulation and test results verified the correctness of the aforementioned theoretical analysis and calculation.
ISSN:0885-8977
1937-4208
DOI:10.1109/TPWRD.2009.2021033