Analysis of set-theoretic unknown input observer and interval observer in robust fault detection

2016 ◽  
Author(s):  
Feng Xu ◽  
Junbo Tan ◽  
Xueqian Wang ◽  
Vicenc Puig ◽  
Bin Liang ◽  
...  
Keyword(s):  
Fault Detection ◽  
Unknown Input ◽  
Unknown Input Observer ◽  
Robust Fault Detection ◽  
Interval Observer

Fault Detection and Isolation in Power Systems Using Unknown Input Observer

2019 ◽  
pp. 38-58 ◽  
Author(s):  
Hassan Haes Alhelou
Keyword(s):  
Fault Detection ◽  
Power Systems ◽  
Frequency Control ◽  
Load Frequency Control ◽  
Fault Detection And Isolation ◽  
Unknown Input ◽  
Unknown Input Observer ◽  
Control Loops ◽  
Interconnected Power Systems ◽  
Unknown Disturbance

Unknown input observers (UIO) find application in many cases for successful fault detection and isolation (FDI). In this chapter, a scenario where the unknown input observer is applied to load frequency control loops in interconnected power systems is analyzed. A UIO was chosen because load demand is not always constant and it can be considered to introduce an unknown disturbance to the system. Mathematical formulations on how to detect and isolate sensor faults are presented which are then implemented in MATLAB Simulink for simulations. Based on this historical survey on the application of UIO, a thesis on UIO application in FDI in distributed generation is done.

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