Abstract
This paper describes data processing of synchronous generator current and voltage measurements, which are used to estimate the machine parameters via Park's transformation. The data preprocessing employs infinite impulse response (IIR) digital filters. The challenge is to filter the measurement data while preserving the phase information within the ac voltage and current. This problem is addressed by converting the phase quantities into a time-invariant frame of reference using Park's transformation. The influence of Park's transformation on higher harmonics is analytically studied here to track the conversion of the harmonics into the transformed domain. Park's transformation is analyzed for positive, negative and zero sequence inputs of different frequencies under balanced and unbalanced conditions. Strategies using filters before and/or after Park's transformation are applied to simulation as well as operational generator data from an electric utility. Results demonstrate that the machine parameter estimation error is reduced from the application of the digital filtering.
Original language | English (US) |
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Title of host publication | Series on Energy and Power Systems |
Editors | A. Domijan, Jr. |
Pages | 454-459 |
Number of pages | 6 |
State | Published - 2004 |
Event | Proceedings of the Seventh IASTED International Conference on Power and Energy Systems - Clearwater Beach, FL, United States Duration: Nov 28 2004 → Dec 1 2004 |
Other
Other | Proceedings of the Seventh IASTED International Conference on Power and Energy Systems |
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Country/Territory | United States |
City | Clearwater Beach, FL |
Period | 11/28/04 → 12/1/04 |
Keywords
- Digital filters
- Harmonics
- Parameter estimation
- Park's transformation
- Power system operation
ASJC Scopus subject areas
- General Engineering