This paper evaluates the impact of a modular Static Synchronous Series Compensator (m-SSSC) on the operation of communication-assisted line distance and differential protection relays. The m-SSSC system incorporates an over-current protection feature to trigger the bypass mode of operation during grid faults. A case study is analyzed for a 220 kV transmission line and an m-SSSC with a reactive power rating of 80 MVAr per phase using a Hardware-In-the-Loop configuration. The obtained results show the impact of the m-SSSC system on the distance protection operation during some cases of high resistive faults. The differential protection operation was not affected by the m-SSSC.
B. Polajžer, A. Trupej, P. Xenos, Presented at 20th International Conference on Renewable Energy and Power Quality (ICREPQ'22), Vigo (Spain), 27 to 29 July 2022, ISSN 2172-038 X, Volume No.20, September 2022
KEYWORDS: FACTS, Static Synchronous Series Compensator, Hardware-In-the-Loop, Transmission Line