Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Power Systems Transient Stability Indices: Hierarchical Clustering Based
  Detection of Coherent Groups Of Generators   Coherent groups of generators, i.e., machines with perfectly correlated rotor
angles, play an important role in power system stability analysis. This paper
introduces a real-time methodology based on hierarchical clustering techniques
for discovering the degree of coherency among generators using the
synchronization coefficient and the correlation coefficient of the generators'
rotor angle as the coherency index. Furthermore, the Power Transient Stability
Indices (PTSI) were employed to examine the versatile response of the power
system. The method uses power systems transients Stability indices, i.e., power
Connectivity Factor (CF) index which presents coherently strong generators
within the groups, the power Separation Factor (SF) index which unveils to the
extent that the generators in different groups tend to swing against the other
groups in the event of a disturbance, and the overall system separation index
which demonstrates the overall system separation status (CF/SF). The approach
is assessed on an IEEE-39 test system with a fully dynamic model. The
simulation results presented in this paper demonstrate the efficiency of the
proposed approach.

18
The categories of this paper are: econ
8
The categories of this paper are: hep-ex
24
The categories of this paper are: dg-ga
7
The categories of this paper are: hep-th
36
The categories of this paper are: cmp-lg
11
The categories of this paper are: hep-lat
23
The categories of this paper are: solv-int
29
The categories of this paper are: funct-an
2
The categories of this paper are: math
3
The categories of this paper are: physics
22
The categories of this paper are: chao-dyn
27
The categories of this paper are: comp-gas
33
The categories of this paper are: plasm-ph
14
The categories of this paper are: math-ph
30
The categories of this paper are: q-alg
31
The categories of this paper are: ao-sci