Droop control modelling and analysis of multi-terminal VSC-HVDC for offshore wind farms

Author

Wang, W. ; Barnes, M. ; Marjanovic, Ognjen

Author_Institution

Sch. of Electr. & Electron. Eng., Univ. of Manchester, Manchester, UK

fYear

2012

fDate

4-5 Dec. 2012

Firstpage

1

Lastpage

6

Abstract

This paper examines methods of control schemes of multiterminal VSC-HVDC systems for offshore wind farm integration. Modelling strategies of droop DC voltage characteristics for grid side converters are analysed in detail. Differences between voltage-current and voltage-power characteristics are briefly described. A four-terminal VSCHVDC model with three onshore terminals is established in simulation to evaluate the dynamic behaviour of the DC grid. Multiple voltage-current characteristics are designed for the four-terminal system to maintain the stability of the DC system. Different control scenarios are investigated and compared using dynamic simulations including wind power variations and a loss of a converter.

Keywords

HVDC power convertors; electric current control; losses; offshore installations; power generation control; power grids; power system simulation; power system stability; voltage control; wind power plants; DC grid; droop DC voltage control modelling; four-terminal VSC-HVDC model; grid side converter; multiple voltage-current characteristics; multiterminal VSC-HVDC system; offshore wind farm integration; onshore terminal; voltage-power characteristics; wind power variation; DIgSILENT Modelling; Droop control; Multi-terminal HVDC; Voltage Source Converter;

fLanguage

English

Publisher

iet

Conference_Titel

AC and DC Power Transmission (ACDC 2012), 10th IET International Conference on

Conference_Location

Birmingham

Electronic_ISBN

978-1-84919-700-7

Type

conf

DOI

10.1049/cp.2012.1963

Filename

6521262