DocumentCode :
3233173
Title :
An effective root based algorithm for power system topological observability
Author :
Maheshwarapu, Sydulu
Author_Institution :
Dept. of Electr. Eng., Regional Eng. Coll., Warangal, India
Volume :
2
fYear :
1998
fDate :
1998
Firstpage :
596
Abstract :
The paper presents a simple and direct “root based” algorithm with efficient data structure to determine the topological observability from the available measurement data set. The root based approach assigns measurements to the branches of the system graph and builds up a tree and determines the topological observability. If the system is unobservable from the available data set, it identifies observable islands with no additional computation and also shows the potential locations for additional meter placement or pseudo-measurements so that the system is observable. The algorithm needs no floating point computations and cannot fail due to numerical round-off problems. In implementing the root based algorithm, the proposed efficient data structure plays a very significant role in drastic reduction of time for observability test. The added advantage of the proposed data structure is that the same is useful for implementing any selected state estimation algorithm exploiting the sparsity of Ybus-matrix. The root based algorithm is tested on 6, 9 and IEEE 14, 30, 57 and 118 bus systems for given sets of measurement data and it could yield correct classification of observable and unobservable cases with reduced memory and execution time
Keywords :
observability; power system state estimation; sparse matrices; 6 bus system; 9 bus system; IEEE 118 bus system; IEEE 14 bus system; IEEE 30 bus system; IEEE 57 bus system; Ybus-matrix sparsity; additional meter placement; data structure; observability test time reduction; power system topological observability; pseudo-measurements; root based algorithm; system graph; Data structures; Equations; Observability; Power measurement; Power system measurements; Power systems; Reactive power; State estimation; Testing; Voltage;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
TENCON '98. 1998 IEEE Region 10 International Conference on Global Connectivity in Energy, Computer, Communication and Control
Conference_Location :
New Delhi
Print_ISBN :
0-7803-4886-9
Type :
conf
DOI :
10.1109/TENCON.1998.798288
Filename :
798288
Link To Document :
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