Grid Integration of Wind Farms Using SVC and STATCOM

Abstract

This paper considers the use of the static VAr compensator (SVC) and static synchronous compensator (STATCOM) for wind farm integration. Wind farm models based on fixed speed induction generators (FSIG), using AC connection and equipped with either SVC or STATCOM, are developed. Stability problems with the FSIG are described. An investigation is conducted on the impact of STATCOM/SVC ratings and network strength on system stability after network faults, and comparison is also made between the performances of the two devices. It was found that the SVC and STATCOM considerably improve the system stability during and after disturbances, especially when the network is weak. It showed that the STATCOM gave a much better dynamic performance, and provided better reactive power support to the network, as its maximum reactive current output was virtually independent of the PCC voltage.