Study on the influence factors of commutation failure in MIDC systems

Based on the commutation failure generation theory, This paper analyzes the influence factors of multi-infeed dc (MIDC) transmission systems, then introduces the concept of multi-infeed short circuit, demonstrates the influence of MISCR on extinction angle and the change regulation in detail.Meanwhile through mathematical derivation, the changing relations of other parameters and extinction angle can be qualitatively explained, which can directly reflect the influence of various parameters on commutation failure. Finally, according to the results of the research, the conclusion meeting the actual situation is drawn.