Title :
Frequency control capability of VSC-HVDC transmission system
Author :
Elansari, A.S. ; Finney, S.J. ; Burr, J. ; Edrah, M.F.
Author_Institution :
Inst. of Energy & Environ., Strathclyde Univ., Glasgow, UK
Abstract :
High voltage direct current (HVDC) systems have been used as an effective solution to transmit power over long distances. Performance of HVDC systems has significantly improved with the emergence of voltage source converter based HVDC (VSC-HVDC). Increased controllability provides independent control of active and reactive power which facilitates controlling of voltage and frequency. This paper investigates the frequency control capability of VSC-HVDC to determine the improvement extent that VSC HVDC systems provide for the frequency recovery and system inertia. Two frequency control strategies using dc voltage and active power outer loops are investigated. The analysis is carried out using a time domain simulator, where the tie line in the Kundur test system is replaced by VSC-HVDC. Simulation results have shown that frequency control capability of VSC-HVDC dramatically improves the frequency performance, especially in isolated power systems.
Keywords :
HVDC power convertors; frequency control; reactive power control; time-domain analysis; HVDC systems; Kundur test system; VSC-HVDC; active power outer loops; dc voltage; frequency control capability; frequency recovery; high voltage direct current systems; independent control; reactive power; system inertia; tie line; time domain simulator; voltage source converter based HVDC; DFIG; Frequency control; VSC-HVDC; inner current controller;
Conference_Titel :
AC and DC Power Transmission, 11th IET International Conference on
Conference_Location :
Birmingham
Print_ISBN :
978-1-84919-982-7
DOI :
10.1049/cp.2015.0030
