A case study to demonstrate the benefit of using synchrophasor signals for power system stabilizers

This paper presents a case where the design of a Power System Stabilizer (PSS) to achieve desired damping using local speed feedback signals is difficult using the conventional design technique. It is shown that synchrophasor based two input power system stabilizer can be designed without much difficulty to achieve the desired damping. Eigenanalysis is performed on the reduced equivalent of New England New York power system. One controller location was found as the best location to improve damping of three inter-area modes. Residue analysis reveals the presence of a remote signal which has better sensitivity to the same controller location. The procedure of designing a two input PSS that uses a local signal and a remote signal is presented and it is shown that the required performance is achieved.