Voltage and frequency control method and device, traction power supply system and computer equipment

The invention relates to a voltage and frequency control method and device, a traction power supply system and computer equipment, and the method comprises the steps: obtaining a first voltage signal of the power supply voltage of the traction power supply system under a first preset coordinate system, and inputting a frequency signal; acquiring a virtual orthogonal voltage signal according to the first voltage signal; acquiring a conversion phase signal of the current conversion module according to the input frequency signal; performing transformation processing on the first voltage signal, the virtual orthogonal signal and the transformation phase signal to obtain a second voltage signal in a second preset coordinate system, the second voltage signal carrying a voltage parameter and a frequency parameter for controlling the operation state of the converter module; therefore, effective control of the commutation module in the traction power supply system is realized, stable AC voltage and frequency are provi