Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Dynamic State Estimation for Integrated Natural Gas and Electric Power
  Systems   A dynamic state estimation method of integrated natural gas and electric
power systems (IGESs) in proposed. Firstly, the coupling model of gas pipeline
networks and power systems by gas turbine units (GTUs) is established.
Secondly, the Kalman filter based linear DSE model for the IGES is built. The
gas density and mass flow rate, as well as the real and imaginary parts of bus
voltages are taken as states, which are predicted by the linearized fluid
dynamic equations of gases and exponential smoothing techniques. Boundary
conditions of pipeline networks are used as supplementary constraints in the
system model. At last, the proposed method is applied to an IGES including a
30-node pipeline network and IEEE 39-bus system coupled by two GTUs. Two
indexes are used to evaluate the DSE performance under three measurement error
conditions, and the results show that the DSE can obtain the accurate dynamic
states in different conditions.

6
The categories of this paper are: astro-ph
5
The categories of this paper are: gr-qc
37
The categories of this paper are: supr-con
27
The categories of this paper are: comp-gas
33
The categories of this paper are: plasm-ph
30
The categories of this paper are: q-alg
24
The categories of this paper are: dg-ga
9
The categories of this paper are: nlin
18
The categories of this paper are: econ
21
The categories of this paper are: adap-org
10
The categories of this paper are: q-bio
13
The categories of this paper are: quant-ph
29
The categories of this paper are: funct-an
20
The categories of this paper are: acc-phys
15
The categories of this paper are: nucl-ex
32
The categories of this paper are: atom-ph