NDLI: Integration of DC circuit breaker and fault current limiter based on zero-voltage resonant switching approach

Content Provider	IET Digital Library
Author	Lin, Hsiung Cheng Hsiao, Kai Chun
Abstract	It is known that most of the renewable energy resources are the DC type. However, DC microgrids do not have zero crossing in current and voltage. This results in serious concerns about the circuit breaking and fault current limiting in the power system. Conventional thyristor-based DC fault current limiters (FCLs) may provide possible solutions for this problem. Unfortunately, a permanent interruption would arise on the system in case of a temporary fault. For this reason, this proposal aims to develop an integration system of the circuit breaker and FCL using a feedback-controlled zero-voltage switching method. In this proposed model, a load current is detected and an appropriate switch signal is thus generated by the controller based on the feedback-control strategy. Once the load current is beyond the predefined value, the switch will be opened to reduce the current immediately for a period of time set by the timer in advance. Then, the switch will be closed again to raise the current continuously until the overload threshold is reached. The switching transition duration is located at the resonant zero voltage, so that no switching power is required. Both simulation and practical performance results confirm that an expected constant load current can be well controlled over an expected range.
Starting Page	344
Ending Page	351
Page Count	8
ISSN	1751858X
Volume Number	13
e-ISSN	17518598
Issue Number	Issue 3, May (2019)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-cds/13/3
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-cds.2018.5167
Journal	IET Circuits, Devices & Systems
Publisher Date	2018-12-03
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Appropriate Switch Signal Circuit Breaker Circuit Breaking Circuit Testing Control of Electric Power System Conventional Thyristor-based DC Fault Current Limiters Current 19.0 A Current Voltage DC Circuit Breaker DC Microgrid DC Type DC-DC Power Converter Distributed Power Generation Distribution Network Expected Constant Load Current Fault Current Fault Current Limiter Fault Current Limiters Feedback Feedback-control Strategy Feedback-controlled Zero-voltage Switching Method Integration System Power Converter Power Distribution Protection Power Electronics Power Supplies to Apparatus Power Supply Power System Renewable Energy ReSource Resonant Zero Voltage Short-circuited Test Supervisory Circuit Switch Switching Converter Switching Power Switching Transition Duration Temporary Fault Zero Crossing Zero Voltage Switching Zero-voltage Resonant
Content Type	Text
Resource Type	Article
Subject	Control and Systems Engineering Electrical and Electronic Engineering

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
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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