NDLI: Evaluation of a communication-based fault ride-through scheme for offshore wind farms connected through high-voltage DC links based on voltage source converter

Content Provider	IET Digital Library
Author	Nanou, Sotirios Papathanassiou, Stavros
Abstract	Offshore wind farms connected to the mainland through high-voltage DC links based on voltage source converters (VSC-HVDC) are subject to grid code requirements, such as fault ride-through (FRT) capability and dynamic voltage support. To address the challenge of FRT capability, sophisticated control strategies are required, capable of handling the power imbalance between the two interconnection ends during onshore grid faults. Τhis study proposes an FRT method which combines a de-loading control strategy for the offshore wind turbines, utilising the communication infrastructure of the VSC-HVDC system, with a DC chopper to dissipate the power surplus that cannot be effectively curtailed via the communication link. The impact of communication system latency on the expected FRT response and the required rating of the DC chopper is investigated using a linearised small-signal model introduced in this study, whose results are validated against time-domain simulations using detailed electromagnetic transient-type models for the entire system. It is concluded that the required rating of chopper resistors can be substantially reduced when existing communication capabilities are exploited, even in the presence of relatively high communication delays.
Starting Page	882
Ending Page	891
Page Count	10
ISSN	17521416
Volume Number	9
e-ISSN	17521424
Issue Number	Issue 8, Nov (2015)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-rpg/9/8
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-rpg.2015.0017
Journal	IET Renewable Power Generation
Publisher	The Institution of Engineering and Technology
Access Restriction	Open
Rights License	Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0/)
Subject Keyword	Chopper Resistors Choppers (circuits) Communication Delay Communication Link Communication System Latency Communication-based Fault Ride-through Scheme Control of Electric Power System D.C. Transmission DC Chopper De-loading Control Strategy Electromagnetic Transient Type Model EMTP Expected FRT Response FRT Capability Grid Code Requirements High-voltage DC Link HVDC Power Converter HVDC Power Transmission Interconnection Ends Linearised Small-signal Model Offshore Wind Farm Offshore Wind Turbine Onshore Grid Fault Power Converter Power Generation Control Power Generation Fault Power Generation Reliability Power Grid Power Imbalance Handling Power Supplies to Apparatus Power System Economics Power System Interconnection Power System Managemen Power System Operation Reliability Resistor Time Domain Analysis Time-domain Simulation Voltage Source Converter VSC-HVDC System Wind Power Plant Wind Turbine
Content Type	Text
Resource Type	Article
Subject	Renewable Energy, Sustainability and the Environment

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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