Multi-port converter of variable-speed wind power system and related circuit

The application discloses a multi-port converter of a variable-speed wind power system. An H-bridge converter and two three-phase converters can be equivalently obtained through eleven switches of themulti-port converter, thereby realizing the functions of three converters in the circuit in the prior art; since the functions of sixteenth switches are realized by only using eleven switches, the cost of the converter is reduced, the total cost for constructing the power grid is further reduced, and the utilization rate of the resource is improved. The application further discloses a variable-speed wind power system and a variable frequency transformer circuit with above advantages. 本申请公开了种变速风电系统的多端口变换器，通过多端口变换器的十个开关可以等效出H桥变换器和两个三相变换器，可以实现现有技术中三个变换器在电路中的功能，由于只使用了十个开关实现了十六个开关的功能，降低了变换器的成本，进步降低电网构建时的总成本，提高资源的利用率。本申请还公开了种变速风电系统以及可变频率变压器电路，具有上述有益效果。