  Superimposed sequence quantities have been relied on for years to provide
pure fault components for various applications in protection schemes. In more
recent times, they have been employed in various solutions to the challenges
introduced by integration of distributed generation in distribution systems. To
improve the overall reliability of protection schemes deployed in such active
distribution networks, this paper evaluates a new approach for detecting
unbalanced faults using negative sequence quantities. A proposed superimposed
negative sequence admittance element is validated using simulation tests on a
modelled community microgrid. The performance of the method is tested for
various fault scenarios in MATLAB/Simulink.
