Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Virtual synchronous generator of PV generation without energy storage
  for frequency support in autonomous microgrid   In autonomous microgrids frequency regulation (FR) is a critical issue,
especially with a high level of penetration of the photovoltaic (PV)
generation. In this study, a novel virtual synchronous generator (VSG) control
for PV generation was introduced to provide frequency support without energy
storage. PV generation reserve a part of the active power in accordance with
the pre-defined power versus voltage curve. Based on the similarities of the
synchronous generator power-angle characteristic curve and the PV array
characteristic curve, PV voltage Vpv can be analogized to the power angle
{\delta}. An emulated governor (droop control) and the swing equation control
is designed and applied to the DC-DC converter. PV voltage deviation is
subsequently generated and the pre-defined power versus voltage curve is
modified to provide the primary frequency and inertia support. A simulation
model of an autonomous microgrid with PV, storage, and diesel generator was
built. The feasibility and effectiveness of the proposed VSG strategy are
examined under different operating conditions.

34
The categories of this paper are: chem-ph
11
The categories of this paper are: hep-lat
25
The categories of this paper are: patt-sol
28
The categories of this paper are: alg-geom
14
The categories of this paper are: math-ph
33
The categories of this paper are: plasm-ph
21
The categories of this paper are: adap-org
17
The categories of this paper are: q-fin
24
The categories of this paper are: dg-ga
31
The categories of this paper are: ao-sci
29
The categories of this paper are: funct-an
22
The categories of this paper are: chao-dyn
23
The categories of this paper are: solv-int
5
The categories of this paper are: gr-qc
37
The categories of this paper are: supr-con
2
The categories of this paper are: math