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The instantaneous power theory, or “the p-q theory,” makes clear the physical meaning of what instantaneous real and imaginary power is in a three-phase circuit. Moreover, it provides insight into how energy flows from a source to a load, or circulates between phases, in a three-phase circuit.
A direct current suppression method and system for an isolated DC-DC resonant converter for energy storage
ActiveCN120110142BImprove voltage withstand capabilityExtended service lifeCapacitanceMathematical model
The application discloses a kind of energy storage isolation type DC-DC resonant converter direct current suppression method and system, to optimize resonant network voltage ripple.The application constructs the voltage ripple mathematical model of resonant network using instantaneous power theory, by calculating the instantaneous power of resonant inductance and capacitance, and monitors the switching frequency of resonant converter is equal to the resonant frequency, is located in the resonant frequency and is away from the resonant frequency three kinds of working conditions, when in corresponding condition, according to corresponding method to determine the range limit of switching frequency, based on this, the switching frequency of resonant converter is dynamically adjusted with different working conditions, to effectively suppress output DC ripple, improve the reliability of power quality guarantee system.
Owner:INNER MONGOLIA CHAHAR NEW ENERGY CO LTD +1