Balkan Journal of Electrical and Computer Engineering

2147-284X 2147-284X

MUSA YILMAZ

10.17694/bajece.470308

Engineering

Mühendislik

Unknown Input Observer Based Robust Actuator Fault Detection and Isolation in Interconnected Power Systems

https://orcid.org/0000-0001-7077-8895

Genc

V. M. İstemihan

ISTANBUL TECHNICAL UNIVERSITY

https://orcid.org/0000-0002-9108-6553

Caliskan

Fikret

ISTANBUL TECHNICAL UNIVERSITY

01 31 2019

7 1 6 14 10 14 2018 01 17 2019

2013

Balkan Journal of Electrical and Computer Engineering

In this paper, the performance degradation of agenerating unit in a multi-area power system regulated by an area-wisedecentralized load frequency control is detected and isolated via a scheme ofunknown input observers. This scheme is robust to the changes in the loaddemand, which are considered as the unknown inputs. The actuator faults studiedin this work are meant to be the performance degradations in generating unitsunder load frequency control. Both stuck and non-stuck actuator faults areanalyzed and the performances of the proposed method in both cases are testedthrough computer simulations on a two-area power system composed of fivegenerating units. The results show that a performance degradation in anygenerating unit can be detected and isolated successfully provided that thefaults in the sensors measuring generator outputs are absent.

fault diagnosis load frequency control fault detection and isolation actuator fault power generation control

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