Instantaneous Reactive Power Compensation Theory Increasing The Control Freedom One Degree Higher

제어 자유도를 한 차원 증가시킨 순시무효전력 보상이론

This paper proposed the p-q-r coordinate system where the instantaneous active power p, and the two instantaneous reactive powers $q_{q}$, $q_{r}$ were defined. The three power components are linearly independent, so the compensation for the two instantaneous reactive powers leads to control the two components of the current space vector. With the theory, the neutral current of a three-phase four-wire system can be eliminated by only compensating the instantaneous reactive power using no energy storage element.