Design of set-valued observer for a particular situation of WECS: commensurate time delays

Zhao, Ruinan; Shen, Yanxia

doi:10.1007/s40435-019-00522-z

Cited by 1 publication

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“…Defining the fault detection time (FDT) as det fd s t t t =− , it is considered an important index to evaluate the performance of fault detection strategy. In the following Table V, the comparison between the proposed strategy FFT-ISVO and SVO with delayed inputs (SVO-DIs) [29], SVO [27], variable gain observer (VGO) [16], model-based strategy [30], and interval observer (IO) [14] of the determining average fault detection time are given. The simulation objects are unified to the WECS under fault case III.…”

Section: Simulation Studiesmentioning

confidence: 99%

Fault Detection of WECSs Based on Improved SVO and Fourier Transformation

Zhao

2024

IEEE Access

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This paper studies the application of estimation error signals frequency domain analysis in the fault detection field. The estimation error signals of actuators are derived from the improved set-valued observer and the benchmark mathematical model of a wind energy conversion system (WECS) with delayed inputs and unknown nonlinear parts. The improved SVO is designed based on the extended Lipschitz condition, the set-induced theory, and the uniformly ultimately boundedness. For the faults of the pitch angle actuators, the estimation error signals are processed by the fast Fourier transform (FFT), and the corresponding fault detection strategies are designed. The simulation results show that the proposed fault detection strategy can detect the actuator fault in the early stage of the fault with high accuracy.

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