Abstract: As one of the load equipment with the most flexible power regulation potential in PEDF systems, the power regulation and operation strategy have changed essentially after the air conditioner is equipped with the flexible regulation capability, in order to explore the operation characteristics of DC flexible air conditioner for power adaptive regulation under different conditions with changing voltage. Carried out the start-stop test, variable voltage test and temperature rise-fall test of DC flexible air conditioner. Compared and analyzed the effects of different operation conditions and parameters on the power regulation and operation performance of DC flexible air conditioner. The results show that: with the reduction of the input DC voltage, the regulation time of DC flexible air conditioner is gradually shortened from the start-up point to the power and air volume stabilization. When the input voltage is 340 V, the operating power of DC flexible air conditioner can be reduced to 71.37% of the power at rated voltage, and when the voltage is 315 V, the operating power can be reduced to 33.88% of the power at rated voltage. Compared with the changing of indoor temperature,, the voltage regulation has a more significant effect on the speed of change of the DC flexible air conditioner operating power, but the degree of influence of the two on the amount of air conditioner operating power regulation is relatively similar.

Key words: PEDF, Direct current, Power adaptive regulation, Performance test