Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Quantify Change of Inertia and Its Distribution in High Renewable Power
  Grids Using PMU   This paper proposed an approach to identify the change of inertia
distribution in high renewable power systems. Using the footprints of
electromechanical wave propagation at the distribution level, this approach
provides a new and non-invasive way to aware the system inertia distribution
for primary frequency response. Actual measurements and high renewable dynamic
models validated effectiveness of the approach.

31
The categories of this paper are: ao-sci
29
The categories of this paper are: funct-an
4
The categories of this paper are: cond-mat
35
The categories of this paper are: mtrl-th
12
The categories of this paper are: nucl-th
37
The categories of this paper are: supr-con
18
The categories of this paper are: econ
13
The categories of this paper are: quant-ph
22
The categories of this paper are: chao-dyn
32
The categories of this paper are: atom-ph
2
The categories of this paper are: math
10
The categories of this paper are: q-bio
3
The categories of this paper are: physics
0
The categories of this paper are: hep-ph
15
The categories of this paper are: nucl-ex
11
The categories of this paper are: hep-lat