Hybrid power supply system and hybrid power supply method for air conditioner

The invention discloses a hybrid power supply system for an air conditioner. The hybrid power supply system comprises an AC (Alternating Current) power supply, a rectifying bridge, a Boost2 voltage booster circuit, a solar battery array, a Boost1 voltage booster circuit, a capacitor, an inverter and a compressor, wherein the output of a solar battery is accessed to a direct-current bus side by the Boost1 booster circuit; a PWM1 (Pulse Width Modulation 1) signal which is accessed to a first switch tube in the Boost1 voltage booster circuit is generated by a solar battery output power control system; the output of the AC power supply is accessed to the direct-current bus side by the rectifying bridge and the Boost2 voltage booster circuit; a PWM2 signal which is accessed to a second switch tube in the Boost2 voltage booster circuit is provided by a power factor correcting control system. The hybrid power supply method provided by the invention comprises the following steps that: the solar battery and an electric supply simultaneously supply power to the air conditioner when the power of the air conditioner is bigger than the biggest output power of the solar battery; and the solar battery supplies power to the air conditioner when the power of the air conditioner is smaller than the biggest output power of the solar battery. The hybrid power supply system and power supply method for the air conditioner can use the solar battery ultimately, and are a commercial power and solar hybrid power supply system and hybrid power supply method for stably supplying power to a household air conditioner.