원문정보
초록
영어
In order to solve the problem of transient oscillation of microgrid during process switching between grid-connected operation and islanded operation, the basic principle of traditional control strategy is analyzed, a novel control structure of smooth switchover for microgrid based on the double negative feedback controller is proposed. Also, to avoid the risk of voltage oscillation caused by the mutual interference of the two controllers in the traditional quasi-synchronization method, an improved quasi-synchronization controller is proposed, which is simpler and easier to implement. Finally, the simulation results verify the validity of the proposed structure. Research results show that the busbar voltage and current oscillation can be solved better with the novel structure, and lay the foundation for smooth switchover.
목차
1. Introductions
2. Microgrid Structure and Control Strategy
2.1 Structure of Microgrid
2.2 Control Strategy of Master Unit
3. Modified Controller based on Double Negative Feedback
4. Modified Quasi-Synchronization Controller for Microgrid
5. The Simulation Results and Analysis
6. Conclusions
Acknowledgement
References