Performance evaluation of distance protection of transmission lines connected with VSC-HVDC system using closed-loop test in RTDS

• Type: Article in International Scientific Journal
• Date: 2017

Authors

Alam, MM (Author) Other; Helder Leite (Author) FEUP; Silva, N (Author) Other; Carvalho, AD (Author) Other

Journal

Title: Electric Power Systems Research

Vol. 152

Pages: 168-183

ISSN: 0378-7796

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 8 Citations

Scopus - 18 Citations

Other information

Authenticus ID: P-00N-250

DOI: 10.1016/j.epsr.2017.06.025

Abstract (EN): Voltage Source Converter (VSC) based High Voltage Direct Current (HVDC) can control voltage and power flow on ac transmission lines with the priority of reactive current support during the fault as suggested in the grid codes for HVDC connections. Furthermore, the fault current contribution from the converter is limited in magnitude and modified in the waveform in order to protect the power electronic devices during the fault, which on the other hand affects the apparent impedance seen by the distance relay. This paper addresses the challenges faced by the distance protection of transmission lines connected with VSC-HVDC system by performing a closed-loop test of a commercial distance relay using Real Time Digital Simulator (RTDS). The power system with VSC is modeled in detail under a more-realistic scenario in RTDS so that the performance of the distance protection can be tested under near to actual field conditions. The responses of the commercial distance relay for balanced and unbalanced faults are analyzed. The oscillograph data of the voltage, current and protection bits recorded by the relay are extracted and compared with the simulation results.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 16