Abstract
Recent steady increase of electric power demand causes power sources to be larger and farer from cities based upon demands consentration in megalopolis, and wide area power interchanges leads to make a power system larger and more complicated. The network is susceptable to poor damping power swing oscillations of relatively low frequency which influence to the whole system.
This report describes the optimization method of damping controller's constants on SVC which is added to SVC's voltage regulator, which is from a standpoint that the SVC is powerful equipment for not only restraint of node voltage fluctuation but also stabilization of power oscillation as multi-function controller. This method has major features as follows.
(1) It is able to make the stability of all over the large scale power system improved without appearing the local unstable phenomenon on each controllers.
(2) Combination with S-method, which was developed by CRIEPI for the eigen value analysis in the large scale power system, makes the optimal design of damping controller easy and efficient.
Remarkable effectiveness for stability enhancement is comfirmed by appling optimal designed SVC to the large scale longitudinal power system to compare with the results of only voltage regulation control.
