Design, Implementation and Analysis of Fault current Limiter for LVRT Improvement of Grid Connected Wind Generator

Abstract

A non-conventional energy-based generation has gained popularity in recent years due to its ability to address a variety of economic and environmental issues. Transmission system operators have made Grid codes more stringent, and it must be met by all the wind turbine generators (WTGs) connected to the grid. Low voltage ride-through (LVRT) is one of the essential grid codes requirement for WTGs. LVRT is the ability of WTGs to remain in synchronism with the grid under system disturbances for a specific time as prescribed by grid codes. LVRT capabilities of WTGs can be enhanced by a variety of solutions, which includes the use of crowbar, DC Chopper, FACTs devices, and fault current limiters (FCLs) etc. Numerous studies have proposed various FCLs for wind farms using doubly-fed induction generators (DFIGs) that are linked to the grid. However, many already constructed wind farms are based on SCIG-based wind farms. So performance FCL for SCIG and DFIG should be compared. The FCLs enhance LVRT performance while also protecting the DFIG converters and DC link. The performance of several types of FCLs is compared using DFIG and SCIG-based wind farms connected as SMIB. The performance of several types of FCLs is compared using DFIG and SCIG-based wind farms connected as SMIB. A hardware prototype can be used to represent actual operation.