Analysis of commutation failure of HVDC transmission system with wind farm

With the increasing shortage of energy resources, wind power has gradually developed and become an emerging environment-friendly source. Now, a large number of electric power generated by wind turbines is transmitted by DC transmission lines, which can better adapt to the characteristics of long distance and large capacity. However, at the same time, the addition of DFIG weakens the stability of the system, and the failure of the transmission system may have a greater impact, causing commutation failure or even blocking. In this paper, the DFIG model is added to the traditional HVDC transmission system, several typical fault conditions are simulated, and whether or not the commutation failure has occurred is analyzed. At the same time, the paper lists the measures taken to reduce the failure of commutation in the current transmission systems with wind farms.