Qualitative analysis of the CCEBC/EEAC method |
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Authors: | Liao?Haohui Email author" target="_blank">Tang?Yun?Email author |
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Affiliation: | Department of Mathematical Sciences, Tsinghua University, Beijing 100084, China |
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Abstract: | The CCEBC/EEAC method is an effective method in the quantitative analysis of power system transient stability. This paper
provides a qualitative analysis of the CCEBC/EEAC method and shows that from a geometrical point of view, the CCCOl-RM transformation
used in the CCEBC/EEAC method can be regarded as a projection of the variables of the system model on a weighted vector space,
from which a generalized `(P)] - `(d)]\bar P - \bar \delta trajectory is obtained. Since a transient process of power systems can be approximately regarded as a time-piecewise simple
Hamiltonian system, in order to qualitatively analyse the CCEBC/EEAC method, this paper compares the potential energy of a
two-machine infinite bus system with its CCEBC/EEAC energy. Numerical result indicates their similarity. Clarifying the qualitative
relation between these two kinds of energies is significant in verifying mathematically the CCEBC/EEAC method for judging
the criterion of power system transient stability. Moreover, the qualitative analysis of the CCEBC/EEAC method enables us
to better understand some important phenomena revealed by quantitative analysis, such as multi-swing loss of stability and
isolated stable domain. |
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Keywords: | CCEBC/EEAC time-piecewise simple Hamiltonian system transient stability |
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