scholarly journals Design and Transient Studies on Multi-Terminal VSC-HVDC Systems Interconnecting Offshore Wind Farms

2019 ◽  
Vol 17 (2) ◽  
pp. 181-192
Author(s):  
M. Mohan ◽  
K. Panduranga Vittal
Keyword(s):  
Large Scale ◽  
Wind Farms ◽  
Transmission System ◽  
Offshore Wind ◽  
Voltage Source ◽  
Transmission Systems ◽  
Offshore Wind Farms ◽  
Continuous Increase ◽  
Modeling And Control ◽  
Hvdc Transmission

In recent years, offshore wind energy has increased significantly. The continuous increase in the offshore wind power generation level brings the requirement of the offshore wind farms (OWFs) integration with an AC grid. The multi-terminal (MT) voltage source converters (VSC)-based high voltage direct current (HVDC) transmission system is an emerging technology and also the best option to interconnect the large-scale OWFs to the AC grid. This paper presents the design, modeling, and control of MT VSC-HVDC transmission system linked offshore wind farms. Different cases of MT VSC-HVDC transmission systems are developed, and its simulation studies are carried out using PSCAD/EMTDC. The test results show the transient performance of the MT VSC-HVDC transmission systems under various AC and DC fault conditions. The studies also include the influence of wind variabilities as in the form of gust and ramp pattern during steady state and fault conditions.

scholarly journals A Review on Topology, Operating and Control Methods of HVDC Transmission System for Offshore Wind Farms

2020 ◽  
Vol 165 ◽  
pp. 06012
Author(s):  
Jinke Li ◽  
Jingyuan Yin ◽  
Yonggao Guan ◽  
Zhenquan Wang ◽  
Tao Niu ◽  
...  
Keyword(s):  
Power Transmission ◽  
Wind Farms ◽  
Transmission System ◽  
Power Sharing ◽  
Offshore Wind ◽  
Control Methods ◽  
Transmission Systems ◽  
Offshore Wind Farms ◽  
Hvdc Transmission ◽  
And Control

High-voltage direct current (HVDC) transmission systems are a promising solution for long distances power transmission offshore wind farms. In order to satisfy the reliability requirements of receiving-end grid and system, the topology, operation and control of HVDC transmission systems for offshore wind farms should be paid more attention. Thus, the aim of this manuscript is to offer a comprehensive summary of existing topology, operation and control methods applied to HVDC transmission system for offshore wind farms. Special attention is provided to the ac grid fault through control methods, droop control methods, power sharing rules and specific requirements of HVDC system planning, model, design and investment. The results are important for understanding the operation of VSC-HVDC in offshore wind farms.

scholarly journals Novel Control Approach for a Hybrid Grid-Forming HVDC Offshore Transmission System

Energies ◽  
2020 ◽  
Vol 13 (7) ◽  
pp. 1681 ◽  
Author(s):  
Shangen Tian ◽  
David Campos-Gaona ◽  
Vinícius A. Lacerda ◽  
Raymundo E. Torres-Olguin ◽  
Olimpo Anaya-Lara
Keyword(s):  
Power Flow ◽  
Wind Farms ◽  
Transmission System ◽  
Offshore Wind ◽  
Voltage Source ◽  
Voltage Source Converter ◽  
Offshore Wind Farms ◽  
Control Approach ◽  
Hvdc Transmission ◽  
Hybrid Configuration

This article describes a hybrid topology of high-voltage direct current (HVDC) for offshore wind farms using a series connection of a voltage source converter (VSC) and six-pulse diode rectifier (6P-DR). In this topology, the offshore side VSC (OF-VSC) acts as a grid-forming converter to maintain the PCC (point of common coupling) voltage of offshore wind farms (WF) and frequency. In addition, the OF-VSC functions as an active power filter to suppress the 5th, 7th, 11th, and 13th order harmonic current components produced by the 6P-DR, making it almost sinusoidal. Due to the 6P-DR being used in the hybrid converter, this new configuration reduces the total cost of the converters and losses, while preserving the power flow to the onshore gird. Compared to the fully-rated converter and hybrid converter based on a 12-pulse diode rectifier, the power loss and cost are reduced, and in addition, the proposed hybrid converter does not require a phase shift transformer nor a high number of diodes. A 200 MW in an HVDC transmission system using the hybrid configuration was simulated in PSCAD. The results show that the system operated correctly and the harmonic components were filtered.

scholarly journals High Voltage DC Transmission Systems for Offshore Wind Farms with Different Topologies

2019 ◽  
Vol 8 (11) ◽  
pp. 2354-2363
Keyword(s):  
High Voltage ◽  
Large Scale ◽  
Wind Farms ◽  
Offshore Wind ◽  
Voltage Source ◽  
Future Research ◽  
Voltage Source Converter ◽  
Offshore Wind Farms ◽  
Multi Level ◽  
Level Converter

Theoretical review of various topologies of high voltage DC links in application to off shore wind forms has been studied and analysed. In addition to that, various types of high voltage DC links such as back to back, two terminal, multi-terminal systems has been covered under this study. The Line-Commutated Converters, Voltage Source Converter, Modular Multi-Level Converter as well as some of advanced hybrid high voltage DC topologies in application to off shore wind forms has been reviewed. This study covers complication arising from large-scale wind power generation. The review paper also points out the scope of future research in high voltage DC converters.

scholarly journals Review on DC transmission systems for integrating large‐scale offshore wind farms

2021 ◽  
Vol 2 (1) ◽  
pp. 1-14
Author(s):  
Zhengxuan Li ◽  
Qiang Song ◽  
Feng An ◽  
Biao Zhao ◽  
Zhanqing Yu ◽  
...  
Keyword(s):  
Large Scale ◽  
Wind Farms ◽  
Offshore Wind ◽  
Transmission Systems ◽  
Offshore Wind Farms
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