WIDE-AREA PSS DESIGN FOR DAMPING INTER-AREA OSCILLATIONS: A TWO-AREA SYSTEM CASE

摘要

Low frequency inter-area oscillations are of majorrnconcern for large power utilities where power is requiredrnto be transmitted from one geographical area to anotherrnover long transmission lines. These oscillations may leadrnto instability and even cascade failure if the oscillationsrnare not damped out quickly. This paper deals with therndesign of wide-area control for damping inter-arearnoscillations using wide-area signals. The phasorrnmeasurement technology (PMUs) used in modern powerrnsystem facilitates the availability of such wide-arearnsignals. It is shown that such wide-area dampingrncontrollers are indeed able to damp inter-area oscillationsrnmore efficiently than local controllers.