Constant extinction angle control of an inverter in a MTDC-AC system is of utmost importance for proper operation under all contingencies. In this paper, the process of control is treated as a pattern recognition problem. A neuro-fuzzy controller is implemented and used for on-line operation s f a MTDC-AC system to enhance the performance of extinction angle control. The proposed controller has significantly inproved the system performanace for cases studied.
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