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Center for Nonlinear Studies |
This talk has been canceled and will be rescheduled at a later time. Phasor measurement units (PMUs) find widespread use in power grids in the United States and around the world. These devices report voltage and current measurements, which are synchronized using GPS signal, at 30 (25) or 60 (50) times per second for systems with nominal frequency of 60 (50) Hz. To fully utilize the measured quantities, it is necessary to perform preprocessing of the data before it can be used in power system applications. The type and the extend of preprocessing depend on the application. The fast reporting rate and data synchronization makes PMU a valuable tool for power system operators, which can record events in the system including oscillations. This talk will focus on the topic of forced oscillation location identification using phasor measurements. Forced oscillations in power systems can be caused by malfunction or improper tuning of the power plant equipment such as governors, exciters, and power system stabilizers. If a forced oscillation frequency is close to the frequency of one of the natural system oscillation modes, a resonance condition takes place which, if not addressed, can lead to equipment damage or in the worst-case scenario, black-out of a certain area in the system. Thus a robust method to identify the source of these oscillations is important for power system operators. A measurement-based method that won the recent IEEE-NASPI Source Oscillation Location Contest for locating the source of forced and poorly damped oscillations will be described, including the necessary data preprocessing procedures.
Host: Wenting Li