Precise Time Dissemination and Applications Development O N the Bonneville Power Administration System

The Bonnwille Power Administration (BPA) uses IRK-B trunsmitted over microwave as its primary system time dissemination. Problems with accuracy and reliability have lerl to ongoing research into better methods. BPA has al~o developed and deployed a unique fault locator which uses precise cinch synchronized by apulre over microwave. It automatically transmits the data to a central computer for analysis. A proposed system couhl combine fault hcution timing and time dksemination into a Ghbal Position System (GPS) timing receiver and close the verification hop through a muster station at the Dittmer Control Center. Such a system would have many advantuges, including lower cost, higher reliahility and wider industry support. %st results indicate GPS has suflcient accuracy and reliability for this and other current timing requirements including synchronous phase angle measurements. A phmor measurement system which provides phase angle has recently been tested with excellent results. Phase angle & a key parameter in power system control applications including dynamic braking, DC modulation, remedial action schemes) and system state estimation. Further research is required to determine the applications which can most eflectively use real-time phase angk measurements and the best method to apply them.