Synchrophasor-assisted visualization and protection of power systems
Traditional visualization of power system is performed through supervisory control and data acquisition (SCADA) systems and state estimator algorithm. Though decades of development and implementation efforts coupled with modern computing resources have resulted in a robust and dependable visualization tool, the measurements fed to the SCADA system are scalar values and are not synchronized at a precise timestamp. Typically, a new set of measurements is available every 2-4 s, which is sufficient for steady-state analysis. With recent advances in sensing, it is possible to get measurements of better quality at a faster rate. Recent generation of phasor measurement units measure and transmit synchronized phasor values of voltages and currents at 60 fps. The purpose of this chapter is not to show how to assimilate these measurements with the current SCADA system, but to explore the possibility of creating another visualization layer independent of SCADA that can provide more insight in to real-time dynamic events taking place in power systems. A concept of supervisory protection is also explored to increase security of protection schemes by detecting relay misoperations. Results are presented from published research papers to facilitate critical evaluation of the feasibility of these concepts.