Studies on the damping improvement of power systems by static synchronous series compensators and power system stabilizers

Abstract

A problem of interest in the power industry is the mitigation of newlineinterarea mode low frequency oscillations The low frequency oscillations in newlinepower systems take place as the synchronous generators swing against each newlineother The frequency range of these oscillations is from 01 to 25 Hz These newlineoscillations are related to the dynamics of power transfer between areas and newlineoften exhibit poor damping when the aggregate power transfer over a corridor newlineis high relative to the transmission strength At times the oscillations can newlineseverely restrict system operations and in some cases can lead to widespread newlinesystem disturbances thereby causing the instability of power systems There newlineare two types of such oscillations referred to as local mode and interarea newlinemode corresponding to a single machinetoinfinitebus SMIB structure and newlinethose occur in interconnected power systems respectively newline newline