NDLI: DC fault protection for modular multi-level converter-based HVDC multi-terminal systems with solid state circuit breakers

Content Provider	IET Digital Library
Author	Stumpe, Maximilian Tünnerhoff, Philipp Dave, Jaykumar Schnettler, Armin Ergin, Dominik Schön, Andre Würflinger, Klaus Schettler, Frank
Abstract	The high penetration of renewable energy requires flexible transmission of electrical energy over long distances. Onshore high-voltage DC (HVDC) interconnectors based on overhead transmission lines have already reached an advanced planning stage. These interconnectors could be extended to multi-terminal grids in the second step for higher transmission redundancy and flexibility. Fast and selective protection concepts for fault handling are required to ensure high reliability and continuous operation of these systems. Modular multi-level converters with submodules in half-bridge topology and solid-state HVDC-circuit breakers (SSCB) provide fault clearing within several microseconds to prevent converter blocking. Within this publication, a selective protection concept for SSCB and multi-terminal HVDC systems based on the overhead transmission is developed and analysed. It is based on a combination of local voltage and current signals and does not require communication between grid nodes. Additional series reactors for limiting rising fault currents are not required. Subsequent simulations for validating the protection concept and identifying its limits are carried out in power systems computer-aided design™/electro-magnetic transient design and control™ for an exemplary HVDC system. The combination of overcurrent protection with additional excitation signals enables selective fault clearing for all types of line fault scenarios.
Starting Page	3013
Ending Page	3020
Page Count	8
ISSN	17518687
Volume Number	12
e-ISSN	17518695
Issue Number	Issue 12, Jul (2018)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-gtd/12/12
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-gtd.2017.1322
Journal	IET Generation, Transmission & Distribution
Publisher Date	2018-04-09
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Advanced Planning Stage Circuit Breaker Converter Blocking D.C. Transmission DC Fault Protection Electromagnetic Transient Design And Control Fault Clearing Fault Current Fault Handling Grid Node Half-bridge Topology HVDC Power Converter HVDC Power Transmission Limiting Rising Fault Current Local Voltage-current Signal Modular Multilevel Converter-based HVDC Multi-terminal System Multiterminal Grid Multiterminal HVDC System Onshore High-voltage DC Interconnectors Overcurrent Protection Overhead Power Line Overhead Transmission Line Power Grid Power Overhead Line Power System Computer-aided Design Power System Interconnection Power System Planning And Layout Power System Protection Power Transmission Fault Power Transmission Planning Power Transmission Protection Reliability Renewable Energy Penetration Selective Protection Concepts Solid-state HVDC-circuit Breaker SSCBs Switch Transmission Redundancy
Content Type	Text
Resource Type	Article
Subject	Control and Systems Engineering Energy Engineering and Power Technology Electrical and Electronic Engineering

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The overhead transmission line protection scheme for the voltage-source converter-based HVDC grids

Protection strategy for multi-terminal high-voltage direct current grids using SFCLs at converter station output

Analysis of the characteristics of fault-induced travelling waves in MMC-HVDC grid

Interactions between a half-bridge MMC and a hybrid DC breaker during fault current interruption compared to a full-bridge MMC

System integration aspects of DC circuit breakers

Impact of variable DC reactors in voltage-source converter based multi-terminal high-voltage DC transmission systems

An auto-reclosing scheme for DC circuit breaker in VSC-HVDC transmission system

DC line soft reclosing sequence for HVDC grid based on hybrid DC breaker

Research on fault protection of DC grid based on hybrid MMC

DC fault protection for modular multi-level converter-based HVDC multi-terminal systems with solid state circuit breakers

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