ABSTRACT

This chapter overviews new or significantly improved power system applications that are possible due to wide-area time-synchronized measurements. Modern electric power systems are designed to connect generators and consumers of power over large distances. This creates a unique engineering challenge for reliable operation, because of the communication demands that result when state measurements need to be shared with mission-critical applications for proper control and operation. Common data delivery requirements for each category are summarized, and special focus is given to interaction with the communication subsystem. Existing situational awareness is built on the supervisory control and data acquisition architecture, which is an asynchronously scanned system with update rates on the order of seconds. For transient instability correction, the control actions selected consist of tripping generation, shedding load, or inserting series compensation on select lines. The chapter describes a solution through the application of time-synchronized measurements.