NDLI: EMTR-based fault location for DC line in VSC-MTDC system using high-frequency currents

Content Provider	IET Digital Library
Author	Zhang, Xipeng Tai, Nengling Wang, Yanhong Liu, Jian
Abstract	An improved electromagnetic time-reversal (EMTR)-based method is proposed for fault-location of voltage-source converter multi-terminal high-voltage direct current systems (VSC-MTDC) transmission lines in this study. After a brief description of the EMTR, its application to lossless transmission line is mathematically demonstrated. Assuming that the DC faults are isolated by AC breakers, a window of adequate transients is used. If the protection has identified the faulted line correctly, only the recorded measurements at both ends of the faulted line should be time-reversed and further calculated. To eliminate the influence from AC side, the 0/1-mode observed currents and high-pass elliptic filter are adopted. After the processed signals are set as current sources, the current effective value at each pre-set fault position is calculated, with the peak value at the real fault-location. The simulation test cases are based on a five-terminal VSCHVDC modified from the China Nanau demonstration project. The results show that the improved method has good performance to deal DC line faults with high resistance and different types. Besides,, the results are not affected by measurement errors. Compared with the travelling wave-based method, the proposed method does not need to employ high sampling rates and precise fault-occurred time; meanwhile, it can achieve more precise results.
Starting Page	2499
Ending Page	2507
Page Count	9
ISSN	17518687
Volume Number	11
e-ISSN	17518695
Issue Number	Issue 10, Jul (2017)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-gtd/11/10
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-gtd.2016.1215
Journal	IET Generation, Transmission & Distribution
Publisher Date	2016-12-21
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	AC Breaker Constant Current Sources Current Sources D.C. Transmission DC Line Fault Electromagnetic Time-reversal Elliptic Filter EMTR-based Method Fault Location Fault-location Five-terminal VSC-HVDC High-pass Elliptic Filter HVDC Power Converter HVDC Power Transmission Lossless Transmission Line Other Power Apparatus And Electric Machine Power Converter Power Filter Power Supplies to Apparatus Power System Measurement And Metering Voltage-source Converter Voltage-source Converter Multi-terminal High-voltage Direct Current System VSC-MTDC Transmission Line
Content Type	Text
Resource Type	Article
Subject	Control and Systems Engineering Energy Engineering and Power Technology Electrical and Electronic Engineering

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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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