Model-Based Fault Detection and Isolation of a Liquid-Cooled Frequency Converter on a Wind Turbine

<table>The CUSUM residual signal for detecting pump delivery pressure decreasing fault. The fault is started at time 400[s] by manually changing the valve position, and the fault is detected at time 447:7 [s].</table>

Journal of Control Science and Engineering

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Figure 16

Figure 16: Model-Based Fault Detection and Isolation of a Liquid-Cooled Frequency Converter on a Wind Turbine 