1999 Volume 119 Issue 12 Pages 1493-1501
The six utilities in the western region from the Chubu area to the Kyushu area have a maximum total power demand of some 94 GW. The power transmission distance from the Chubu area to the Kyushu area is some 1000 km, and the east-ward power flow is increasing. When a power failure occurs in such a large-scale power transmission system, the result is not only a power oscillation with a cycle of about 0.7-1.2 seconds but also other power oscillations with a cycle of about 2-6 seconds. The latter has become a problem of increasing magnitude in recent years.
This paper describes a PSS that can damp system power modes of a wide band more effectively than the currently available PSS and which has been developed as part of an improvement of an excitation control system with relatively low cost. The feature of this PSS is that it includes an element operating in parallel with the (ΔP+Δω)-PSS with the ability to damp long-cycle oscillations. This PSS is referred to as a parallel PSS.
To verify that the parallel PSS has the originally expected damping capability, simulations on the real power system were conducted.
The transactions of the Institute of Electrical Engineers of Japan.B
The Journal of the Institute of Electrical Engineers of Japan
