| Autor: |
Shun Hsien Fred Huang, Nemica Kadel, Bill Blevins, Patrick Gravois, John Schmall, Surya Santoso, W. Mack Grady, Alvaro Furlani Bastos, Megan Miller, Taehyung Kim |
| Rok vydání: |
2021 |
| Předmět: |
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| Zdroj: |
2020 52nd North American Power Symposium (NAPS). |
| DOI: |
10.1109/naps50074.2021.9449733 |
| Popis: |
Phasor measurement units are widely used for enhancing awareness of the operation of transmission and distribution networks. Their synchronized measurements enable the development of multiple near-real-time applications that are unattainable with SCADA data only. However, the accuracy of PMU measurements is highly dependent on the chosen algorithms. This paper illustrates that a certain PMU model is unable to accurately estimate system frequency as it drifts away from its nominal value (the estimated frequency profile is contaminated with pseudo-oscillations). Moreover, three devices connected at the same location produce divergent estimates during off-nominal frequency operation. Then, a technique is proposed for directly estimating frequency from phase angle measurements through numerical derivatives. It is shown to accurately estimate the system frequency regardless of nominal or off-nominal frequency operation, and it eliminates the two issues presented previously. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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