Power system stabilizer application in a multi-machine generating plant

The authors describe how eigenvalue and eigenvector methods can be used to determine the effects of placing power system stabilizers on different machines in a multi-machine generating plant. The plant in question has six generating units, the sizes and electrical characteristics of which differ significantly from each other. This mixture of units gives rise to a number of distinct oscillatory modes in the plant which can be effectively damped using delta-omega-based power system stabilizers acting on specifically selected units in the plant. The basic principles of the methods used and the results of simulation studies illustrating the various effects are presented.