© The Institution of Engineering and Technology
Grid impedance matrices estimation is important in monitoring and protection of wide-area power systems. In this study, a recursive least-squares estimation algorithm with a forgetting factor is presented to identify impedance parameters of power grids. This approach is based on synchronised phasor measurements and makes it possible to track changing parameters. The algorithm is tested on two power systems using MATPOWER-generated data, and case studies are conducted for estimation of grid impedances followed by voltage stability margin analysis and fault detection. The results show that the proposed method is effective for online estimation of grid impedances, fault detection and voltage stability monitoring.
References
-
-
1)
-
L. Ljung
.
(1999)
System identification: theory for the user.
-
2)
-
Larimore, W.E.: `Canonical variate analysis in identification, filtering and adaptive control', Proc. 29th IEEE Conf. on Decision and Control, December 1990, Honolulu, Hawaii, p. 596–604.
-
3)
-
Y. Wang ,
W.Y. Li ,
J.P. Lu
.
A new node voltage stability index based on local voltage phasors.
Electr. Power Syst. Res.
,
265 -
271
-
4)
-
G. Fusco ,
A. Losi ,
M. Russo
.
Constrained least squares methods for parameter tracking of power system steady-state equivalent circuits.
IEEE Trans. Power Deliv.
,
3 ,
1073 -
2000
-
5)
-
http://www.ee.washington.edu/research/pstca, August 1993.
-
6)
-
A.G. Phadke
.
Synchronized phasor measurements in power systems.
IEEE Comput. Appl. Power
,
2 ,
10 -
15
-
7)
-
G. Verbi ,
F. Gubina
.
A new concept of voltage-collapse protection based on local phasors.
IEEE Trans. Power Deliv.
,
2 ,
576 -
581
-
8)
-
M. Zima ,
M. Larsson ,
P. Korba ,
C. Rehtanz ,
G. Andersson
.
Design aspects for wide-area monitoring and control systems.
Proc. IEEE
,
980 -
996
-
9)
-
B. Milosevic ,
M. Begovic
.
Voltage-stability protection and control using a wide-area network of phasor measurements.
IEEE Trans. Power Syst.
,
1 ,
121 -
127
-
10)
-
P. Kessel ,
H. Glavitsch
.
Estimating the voltage stability of a power system.
IEEE Trans. Power Deliv.
,
3 ,
346 -
354
-
11)
-
S. Corsi ,
G.N. Taranto
.
A real-time voltage instability identification algorithm based on local phasor measurements.
IEEE Trans. Power Syst.
,
1271 -
1279
-
12)
-
M.H. Haque
.
On-line monitoring of maximum permissible loading of a power system within voltage stability limits.
IEE Proc. Gener. Transm. Distrib.
,
107 -
112
-
13)
-
P.V. Overschee ,
B.D. Moor
.
(1996)
Subspace identification for linear systems: theory, implementation, and applications.
-
14)
-
K. Vu ,
M. Begovic ,
D. Novosel ,
M.M. Saha
.
Use of local measurements to estimatevoltage stability margin.
IEEE Transactions on Power System
,
3 ,
1029 -
1035
-
15)
-
R.D. Zimmerman ,
D. Gan
.
(2007)
MATPOWER User's Manual.
http://iet.metastore.ingenta.com/content/journals/10.1049/iet-gtd.2010.0021
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