Voltage-type PWM converter/inverter system and method of controlling the same

摘要

The present invention relates to a voltage PWM converter/-­inverter system comprising:a converter (20) for converting an inputted alternating-­current power into a direct-current power to output the same to an inverter (30) for converting the direct-current power outputted by the converter into an alternating-cur­rent power to output the same, a smoothing unit (60) inser­ted between the converter (20) and the inverter (30), an instantaneous real power calculating unit (70) for calcula­ting an instantaneous real power belonging to the inverter to output an instantaneous real power calculated value (Pd), a converter controller (21) for voltage PWM-control­ling the converter, based on a set converter command value, a terminal direct-current voltage value of the smoothing unit, and the instantaneous real power calculated value, and an inverter controller (31) for voltage PWM-controlling the inverter, based on a set inverter command value and the alternating-current power outputted by the inverter.