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1. A review on microgrid technology containing distributed generation system.

2. Present situation of research on microgrid and its application prospects in China.

3. Microgrid offers a new idea to solve the technical challenge brought by the interconnection of distributed generation and reduce the affects of natural disaster such as earthquake on power grid.

4. Microgrid not only solves the large-scale access of DGs, take full advantages of them, but also give users a variety of other benefits.

5. Microgrid can not only solve the problem of large scale DG coupling but also play full advantages of DG, improve power supply reliability and bring more benefits to users.

6. In San Diego, the Beach Cities Microgrid project will prove the effectiveness of integrating multiple distributed-energy resources with advanced controls and communications.

7. A microgrid with various distributed energy resources (DERs) should be operated safely and efficiently within its local distribution network, but it is also capable of islanding.

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8. For these reasons, microgrid has become a hot point of research around the world.

9. Microgrid is put forward to coordinate contradiction between the large power grid and distributed generation.

10. When the microgrid operates in the grid-connecting mode, all the DGs can be scheduled to PQ control, according to the management of stable output power settings.

11. Most of micro sources in a MicroGrid are interfaced through power electronic converters. The interfaces of converters increase the flexibility of control but reduce the inertia of the MicroGrid.

12. Lack of inertia and two operation modes pose difficulties in maintaining a power balance between generation and consumption and controlling the network frequency of an islanded MicroGrid.

13. To that end, the facility will study new resource management techniques that, for example, utilize cooling microgrid.

14. This paper introduces distributed generation technology and general construction of microgrid, presents their advantages and the problems to be solved.

15. The main purpose of this dissertation is to investigate the microgrid analysis techniques for energy conservation and renewable energy applications.

16. With the implementation of the multiple feedback loop controller, the Microgrid can export high-quality power under the grid-connected mode.

17. This thesis concentrates on a control strategy and operation characteristics of an inverter-interfaced MicroGrid. The main jobs of the thesis are as the following.

18. So the Dynamic Voltage Restorer DVR is introduced in the microgrid to improve the power quality.

19. The impact of different types of faults and the different locations of faults on the transient stability of the MicroGrid are also investigated.