Energy and Power Engineering

Volume 5, Issue 4 (July 2013)

ISSN Print: 1949-243X   ISSN Online: 1947-3818

Google-based Impact Factor: 0.66  Citations  

A Novel Pilot Protection for VSC-HVDC Transmission Lines Based on Correlation Analysis

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DOI: 10.4236/epe.2013.54B224    4,679 Downloads   6,127 Views  Citations

ABSTRACT

The control system of voltage source converter HVDC (VSC-HVDC) is complex and its fault tolerance ability is not sufficient, and correct rate of line protection device is not high. A novel pilot protection for VSC-HVDC transmission lines based on correlation analysis is proposed in this paper. In the principle, external fault is equivalent to a positive capacitance model, so the correlation coefficient of the current and voltage derivative is 1; while the internal fault is equivalent to a negative capacitance model, so the correlation coefficient of the current and voltage derivative is -1. Internal faults and external faults can be distinguished by judging the correlation coefficient. Theoretical analysis and PSCAD simulation experiments show that the new principle, which is simple, not affected by transition resistance, control type and line distributed capacitance current, can identify internal faults and external faults reliably and rapidly, having certain practical value.

Share and Cite:

X. Jin and G. Song, "A Novel Pilot Protection for VSC-HVDC Transmission Lines Based on Correlation Analysis," Energy and Power Engineering, Vol. 5 No. 4B, 2013, pp. 1182-1186. doi: 10.4236/epe.2013.54B224.

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