Paper67 Final
Paper67 Final
Paper67 Final
I. I NTRODUCTION
T is well known that power system stability analysis is an
integral part of power system planing studies [1]. In such
studies, handling large amount of system data and visualization
of results are a real challenge to power system engineers. This
has lead to the development of several software tools for the
analysis and visualization of large power systems. PSAT [2],
UWPFLOW [3], Power System Toolbox [4], MatPower [5],
Voltage Stability Toolbox (VST) [6], MatEMTP [7], SimPowerSystems (SPS) [8], Power Analysis Toolbox [9], Educational
Simulation Tool (EST) [10] and PowerWorld software [11] are
some of the tools noted from the exhaustive list. However,
among these, PSAT and MatPower are not only open-source,
but also are MATLAB-based packages.
In this paper, the features and flexibilities of MatSim [12], a
MATLAB/SIMULINK-based tool for performing both smallsignal and transient stability analysis of multimachine power
systems are explained. It contains a front-end MATLAB-based
GUI which facilitates the following:
1) Creation of pictorial representation of a power system in
terms of a single-line diagram using SIMULINK library
modules.
2) Automatic generation of data files employing dedicated
function/script files.
Fig. 2.
Fig. 1.
Fig. 3.
Fig. 4.
Fig. 5. MatSim main -window along with Extract data files & PSS design
-window.
YBU S V
= f (x, V , u)
V , SL )
= I(x,
(1)
(2)
where,
x represents the vector of the state-variables
u represents the vector of inputs
I denotes the bus-current injection vector, V -represents the
bus-voltage vector, SL represents the bus-power injections and
YBU S denotes the bus-admittance matrix.
For eigenvalue analysis, the above equations are linearized
to obtain the linearized state-equations given by
x = Ax + Bu
(3)
y = Cx + Du
(4)
Fig. 7.
90
0.001
120
60
0.0008
0.0006
30
150
0.0004
SG1
0.0002
180
SG2
SG3
SG4
210
330
240
300
270
Fig. 8.
Slip vs Time
x 10
2
m/c2
m/c1
1
m/c3
m/c4
2
Fig. 11.
10
TIME (s)
12
14
16
18
20
Fig. 9. State variable listing for the selected eigenvalue 0.2653 j4.5064.
Eigenvalues
0.17459 j 9.9806
0.14482 j 8.0559
0.03353 j 2.8531
0.01192 j2.6584
DF
-0.01749
-0.017974
-0.011752
-0.00448
Freq.(Hz)
1.5885
1.2821
0.4540
0.4231
Generator part.
111, 104
104, 111
110, 93
110, 93
R EFERENCES
900
800
700
Amplitude (p.u.)
600
No PSS
500
400
300
With PSS
200
100
Fig. 12.
0.5
1.5
Frequency response of
2
Frequency (Hz)
T e(s)
V ref (s)
2.5
3.5
0.02
Mho104
Generator104
0.04
0.06
0.08
0.1
0.12
0.06
0.04
0.02
0
R
0.02
0.04
0.06
IV. C ONCLUSIONS
In this paper, the key features of a versatile power system analysis tool, MatSim, are presented. Since this is a
MATLAB-based tool it is very convenient for the users at
the UG/PG/research level to carry out advanced power system
studies without much introduction. Thus, with the authors
experience, it is found to be a ready-to-use and cost effective
tool to augment classroom study. Further, due to flexible
structure of the algorithm, any new components such as
FACTS devices, HVDC systems etc. can be added to the
MatSim. These development is also being looked at from the
point-of-view of designing a virtual lab under the ICT project,
Govt. of India.
ACKNOWLEDGMENT
The authors would like to thank Prof. A.M. Kulkarni (IIT
Bombay) for his valuable suggestions.