Open-Circuit Fault Analysis and Recognition in Three-Level Inverters Based on Recurrence Plot and Convolution Neural Network

Figure 9

Feature extraction results of different convolution of two current signal of URP. (a) No-fault current signal. (b) URP of no-fault current signal. (c) Activation_1 of the convolutional layer. (d) Activation_6 of the convolutional layer. (e) S1-open-circuit fault current signal. (f) URP of S1-open-circuit fault current signal. (g) Activation_1 of the convolutional layer. (h) Activation_6 of the convolutional layer.

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