Steady-State Characteristics of a Line-Commutated Converter-Based High-Voltage Direct Current Transmission System for Series-Connected Wind Power Plants

A line-commutated converter-based (LCC) high-voltage direct current (HVdc) transmission system without ac harmonic filters for series-connected wind power plants has been proposed. This type of wind power plant is expected as a next-generation offshore wind power plant due to offshore substation fre...

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Bibliographic Details
Published inIEEE transactions on industry applications Vol. 56; no. 4; pp. 3932 - 3939
Main Authors Yamashita, Ken-ichiro, Tsukamoto, Gai, Nishikata, Shoji
Format Journal Article
LanguageEnglish
Published New York IEEE 01.07.2020
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Circuits
Compensators
Converters
DC power transmission
Direct current
Electric power generation
Electric power transmission
Equations of state
harmonic distortion
High voltages
HVDC transmission
Inverters
Mathematical analysis
Mathematical model
Offshore energy sources
power conversion
power conversion harmonics
Power plants
Power transmission lines
Reactive power
Steady state
Substations
thyristor circuits
transformers
Wind power
Wind power generation
Wind speed
Wind turbines
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Summary:A line-commutated converter-based (LCC) high-voltage direct current (HVdc) transmission system without ac harmonic filters for series-connected wind power plants has been proposed. This type of wind power plant is expected as a next-generation offshore wind power plant due to offshore substation free. In the LCC-HVdc system, power compensators are connected to each receiving-end circuit instead of the conventional ac harmonic filters and static var compensators (SVC). In this article, steady-state characteristics of the system are investigated through theoretical and experimental investigations. A set of steady-state equations for the system is derived first. The steady-state characteristics of the system for changes in wind speed are discussed using experimental setup built in our laboratory, and the validity of the derived equations is confirmed. Also, it is shown that the output active power and reactive power of the system can be controlled independently. Finally, the steady-state characteristics of a practical-scale system are investigated using the steady-state equations.
ISSN:0093-9994
1939-9367
DOI:10.1109/TIA.2020.2986984