Pulse control method of subway bidirectional converter active neutral-point clamped three-level inverter

The invention discloses a pulse control method of a subway bidirectional converter active neutral-point clamped three-level inverter, which comprises the following steps: when Uref is in a positive half cycle, PWM2 is a high level, and PWM4 is a low level; when Uref is larger than or equal to Tri, the PWM1 jumps from the low level to the high level, the PWM5 jumps from the high level and keeps thelow level, and the PWM3 and the PWM6 jump from the high level ahead of the PWM5 and keep the low level; and when the Uref is smaller than or equal to the triangular carrier Tri, the PWM1 jumps from the high level to the low level, the PWM5 jumps from the low level to the high level, and the PWM3 and the PWM6 jump from the low level lagging than the PWM5 to the high level. In the negative half cycle of Uref, PWM3 is a high level, and PWM1 is a low level; when |Uref|>=|Tri|, the PWM4 jumps from the low level to the high level, the PWM6 jumps from the high level to the low level, and the PWM2 and the PWM5 jump from the