부산대학교 도서관

This paper presents a distributed cooperative control that ensures reliable operation of DC Microgrid with lower generation cost without centralized controller. Centralized hierarchical multilevel controller is the commonly used controller in Microgrids, however it requires heavy communication network and present single point of failure. Therefore, the proposed controller is a distributed cooperative control that provide simple communication network infrastructure. The controller of each source exchanges data with only its neighbors on the communication network. The distributed cooperative controller that compare the generation cost of each source with a weighted average of its neighbors in the network. Accordingly, it generates a voltage correction term in order to adjust the local voltage set point and to provide lower generation cost in the microgrid. The performance of the proposed controller has been investigated and tested using MATLAB simulation program. Moreover, the efficacy of the proposed controller to changes in operational conditions and its resiliency against the loss of converters is also investigated.