The increasing penetration of inverter-based resources is affecting the overall power system security, so that effective tools are needed to provide system awareness and identify the most suited countermeasures. To tackle this problem, real-Time monitoring and assessment of transmission grids based on synchrophasor measurements have drawn the attention of many researchers over the last decade, thanks to the high temporal resolution of data provided by phasor measurement units. In this study, a new version of the dynamic mode decomposition (DMD) is proposed as a tool for the real-Time identification of electromechanical oscillations. This approach is able to provide information on the dynamic characteristics (frequency and damping) and the spatial correlation (mode shape) of the modes identified. Besides, an improved criterion is used to track and discern the dominant modes. The effectiveness of the DMD method has been tested on the two-Area Kundur system and validated using data from a real event on the European synchronous grid, giving promising results. Thanks to its reliability and robustness, the DMD is now implemented in the Terna (the Italian transmission system operator) Wide Area Measurement System in use in the control room.

Real-Time identification of electromechanical oscillations through dynamic mode decomposition

Berizzi A.;Bosisio A.;Simone R.;Vicario A.;
2020-01-01

Abstract

The increasing penetration of inverter-based resources is affecting the overall power system security, so that effective tools are needed to provide system awareness and identify the most suited countermeasures. To tackle this problem, real-Time monitoring and assessment of transmission grids based on synchrophasor measurements have drawn the attention of many researchers over the last decade, thanks to the high temporal resolution of data provided by phasor measurement units. In this study, a new version of the dynamic mode decomposition (DMD) is proposed as a tool for the real-Time identification of electromechanical oscillations. This approach is able to provide information on the dynamic characteristics (frequency and damping) and the spatial correlation (mode shape) of the modes identified. Besides, an improved criterion is used to track and discern the dominant modes. The effectiveness of the DMD method has been tested on the two-Area Kundur system and validated using data from a real event on the European synchronous grid, giving promising results. Thanks to its reliability and robustness, the DMD is now implemented in the Terna (the Italian transmission system operator) Wide Area Measurement System in use in the control room.
2020
oscillations
power system stability
power system measurement
power grids
damping
power system interconnection
phasor measurement
power system security
power system security
system awareness
suited countermeasures
real-time monitoring
transmission grids
synchrophasor measurements
phasor measurement units
dynamic mode decomposition
DMD
real-time identification
electromechanical oscillations
spatial correlation
mode shape
dominant modes
two-area Kundur system
European synchronous grid
Terna Wide Area Measurement System
the Italian transmission system operator
inverter-based resources
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11311/1152278
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