Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Time-variant Nonlinear Participation Factors Considering Resonances in
  Power Systems   The participation factor (PF), as an important modal property for
small-signal stability, evaluates the linkage between a state variable and a
mode. Applying the normal form theory, a nonlinear PF can be defined to
evaluate the participation of a state variable into modal dynamics following a
large disturbance, that gives considerations to resonances and nonlinearities
up to a desired order. However, existing nonlinear PFs are inconsistent with
the conventional linear PF when nonlinear dynamics following a large
disturbance attenuate and linear modal dynamics become dominating. This paper
proposes a time-variant nonlinear PF by introducing a time decaying factor and
the definition of a nonlinear mode. The new PFs consider modes of resonances
and their values naturally transition to a linear PF when the system state
becomes close to its equilibrium. The case study on a two-area four-generator
system shows that the new PF can correctly rank generators by their
participations in natural and resonance modes of nonlinear oscillation subject
to a large disturbance.

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The categories of this paper are: econ
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The categories of this paper are: plasm-ph
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The categories of this paper are: mtrl-th
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The categories of this paper are: comp-gas
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The categories of this paper are: acc-phys
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The categories of this paper are: hep-ex
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The categories of this paper are: alg-geom
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The categories of this paper are: quant-ph
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The categories of this paper are: patt-sol
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The categories of this paper are: hep-ph
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The categories of this paper are: nucl-ex
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The categories of this paper are: gr-qc
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The categories of this paper are: dg-ga
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The categories of this paper are: adap-org
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The categories of this paper are: chem-ph
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The categories of this paper are: q-fin