The Mapping Theory between Current/Voltage and Instantaneous Powers in Three-phase Systems

3상 계통에서 전류/전압과 순시전력간의 맵핑이론

The relation between instantaneous active/reactive powers and currents is defined by voltage mapping matrix in three-phase four-wire systems. Control strategies for an active filter without energy storage components are proposed on the basis of mapping matrices. It can compensate for the zero-sequence current, irrespectively of whether or not a zero-sequence voltage exists in a three-phase four-wire system.