Affiliation:
1. College of Engineering, Anna University, India
Abstract
Flexible AC transmission system devices are widely employed for a variety of advantages, such as improved power flow capabilities and voltage control. The generator loss of excitation protection relay is impacted by the existence of FACTS devices like STATCOM (static synchronous compensator) in terms of relay reach and operating time. The protection of generator is complicated because of the auxiliary equipment's connection to the generator. Generator excitation loss is the frequent fault that accounts for 70% of all generator failures. Therefore, it is crucial to identify excitation loss as soon as possible. It is obvious that the existing protection scheme may mal-operate in presence of STATCOM. So, it is necessary to evolve a new protection scheme. In this context a new loss of excitation protection scheme is proposed based on PMU-Fuzzy. Investigations into the proposed protection scheme are performed to analyse the performance and influence of STATCOM. The results of proposed schemes and traditional loss of excitation scheme are compared. Investigations are performed in MATLAB/SIMULINK.