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Synchrophasors data analytics framework for power grid control and dynamic stability monitoring

Synchrophasors data analytics framework for power grid control and dynamic stability monitoring

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This article develops a framework for phasor analytics necessary to enable advanced wide-area control and monitoring applications. The key component in this building is the smart phasor measurement unit for control (PMU/C) which from the substation can feed accurate fundamental and low order harmonics phasors to the phasor data concentrator at a higher than the standard rate of one point per cycle. The second piece of the building is the dynamic generator state estimation, which is mandatory to enhance the observability of dynamic phenomena and thus, improves control performance and protection dependability. Following dynamic state estimation, a combined time and frequency domain processing of voltage, angle and frequency measurements based on S-transform is proposed as a good mean for extracting critical features which enable crisper information that are more easily interpretable than the raw phasor time-series. Gluing all the proposed pieces at both substation and supervisory levels, it is possible to build a smart wide-area situational awareness system, able to close the loop through educated and well informed operators for handling geomagnetic disturbance (GMD) impacts on the grid and/or through fast control and automation devices for dealing with stability issues.


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