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Content available Power system participation factors for real and complex eigenvalues cases
Konoval V., Prytula R.
Poznan University of Technology Academic Journals. Electrical Engineering
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2017
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No. 90
369--381
EN
This paper provides a brief overview on existing approaches for defining participation factor in modal analysis. We calculated participation factors using different approximations and specific examples, and then compared the obtained results with equations derived from the mode evolution. As a result, the existing methods for determining a state variable participation factor in mode are proved incorrect result for complex eigenvalue case. Modem software applications designed to analyze power system stability deploy old approaches that provide incorrect results of modal analysis and pose risks to the operation of real power systems. To solve this problem we presented a new broadened definition of participation factor that assures correct results for real and complex eigenvalues cases. We used a two-mass mechanics system to validate proposed approach and our findings confirm the proposed participation factor theory.
2
Content available Participation factor in modal analysis of power systems stability
Konoval V., Prytula R.
Poznan University of Technology Academic Journals. Electrical Engineering
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2016
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No. 86
97--104
EN
This paper provides a brief overview on existing approaches for defining participation factor in modal analysis which characterizes the interaction between modes and state variables of power system. We calculated participation factors using different methods and compared the results obtained with the expressions derived from mode evolution. For cases of complex eigenvalues of linear differential equations characteristic matrix it was discovered incorrect existing approaches for defining participation factor of state variable in mode. Modern software applications designed to analyze power system stability widely deploy the approaches discussed that provide incorrect results of modal analysis and pose risks to the operation of real power systems. Therefore the problem of calculating the participation factor remains as important as ever.
3
Content available remote Small Signal Stability Analysis of Six-phase Synchronous Generator
Singh G. K., Singh D.
Przegląd Elektrotechniczny
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2013
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R. 89, nr 6
76--82
EN
In the present work, a higher order linearized model has been developed to assess the small signal excursion characteristics of an asymmetrical six-phase synchronous generator system connected to infinite bus using eigenvalue criterion. The stability of the system under small perturbation of different variables has been examined from the placement of eigenvalues. The work establishes an association between generator and loading parameters with pair of eigenvalues, thus the system stability. Further a participation factor analysis has also been carried out to identify the effect of dynamic state variable on a given mode or eigenvalue.
PL
W artykule zaprezentowano linearyzowany model wyższego rzędu umożliwiający analizę asymetrycznego sześciofazowego generatora asynchronicznego podłączonego do nieskończonej linii. Badano stabilność systemu przy małych zakłóceniach.
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