Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Fluid Model of an Electric Vehicle Charging Network   We develop and analyze a measure-valued fluid model keeping track of parking
and charging requirements of electric vehicles in a local distribution grid. We
show how this model arises as an accumulation point of an appropriately scaled
sequence of stochastic network models. The invariant point of the fluid model
encodes the electrical characteristics of the network and the stochastic
behavior of its users, and it is characterized, when it exists, by the solution
of a so-called Alternating Current Optimal Power Flow (ACOPF) problem.

7
The categories of this paper are: hep-th
12
The categories of this paper are: nucl-th
20
The categories of this paper are: acc-phys
9
The categories of this paper are: nlin
11
The categories of this paper are: hep-lat
32
The categories of this paper are: atom-ph
3
The categories of this paper are: physics
24
The categories of this paper are: dg-ga
8
The categories of this paper are: hep-ex
31
The categories of this paper are: ao-sci
5
The categories of this paper are: gr-qc
29
The categories of this paper are: funct-an
30
The categories of this paper are: q-alg
4
The categories of this paper are: cond-mat
33
The categories of this paper are: plasm-ph
10
The categories of this paper are: q-bio