Research on Deadbeat Control Strategy of Active Power Filter

In order to solve the time delay of active power filter(APF) in the process of harmonic current detection and digital chip,a deadbeat strategy based on space vector is proposed.It analyses the principle of the APF system and space vector deadbeat control theory,and its control strategy is given.In order to reduce the delay caused by the harmonic current detection,the harmonic current detection method based on instantaneous reactive power theory(IRPT) is used.EMTDC/PSCAD software is used to build a simulation based on the deadbeat control of the APF system and a 380 V/150 A prototype is built to verify the strategy.The results show that such a control strategy can effectively suppress the APF delay error,and has good dynamic characteristics.