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A simple and robust approach for islanding detection is introduced in this paper. The proposed approach detects islanding using the transient signals. The three phases' currents seen at the DG terminals are combined into one modal signal that fully represents the system. The feature vector is extracted from the selected modal current signal utilizing discrete wavelet transform. The extracted feature...
This paper presents a robust natural-frame-based interfacing scheme for grid-connected distributed generation inverters. The control scheme consists of a dead-beat line-voltage sensorless natural-frame current controller, adaptive neural network (NN)-based disturbance estimator, and robust sensorless synchronization loop. The estimated uncertainty dynamics provide the necessary energy shaping in the...
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