Synchronisation of two separate zones in a standalone microgrid

The Journal of Engineering

Chun-Yi Liu¹  Ying-Yi Hong¹  Yih-Der Lee²  Der-Chuan Ouyang²  Yung-Ruei Chang² 

[1] Department of Electrical Engineering, Chung Yuan Christian University, Taoyuan City 32023, Taiwan;Smart Grid division, Institute of Nuclear Energy Research, Taoyuan City 32546, Taiwan

关键词: three-phase frequencies;    prespecified DGS;    Clark transform;    energy storage systems;    microgrid topology restoration;    synchronisation controller;    ESS;    two separate zone synchronisation;    three-phase voltage;    off-shore isl;    s;    Mamdani fuzzy rules;    st;    alone microgrid;    remote areas;    distributed generation sources;   

DOI  :  10.1049/joe.2017.0045

学科分类：工程和技术（综合）

来源: IET

【 摘 要 】

Standalone microgrids that comprise distributed generation sources (DGSs) or energy storage systems (ESSs) exist on off-shore islands or remote areas. When a fault occurs in a standalone microgrid, the microgrid is separated into several zones with pre-specified DGS or ESS supplying power to local loads. After the fault is cleared, the three-phase voltages and frequencies may differ among these zones. To restore the original microgrid topology, these zones must be reconnected to each other by synchronisation. A synchronisation controller of the DGS/ESS that accounts for slightly different three-phase voltages and frequencies in two separate zones is presented. The Clark transform and Mamdani fuzzy rules are used to implement the controller, providing fast and seamless synchronisation. Simulation results using a standalone microgrid show the practical applicability of the proposed method.

【 授权许可】

CC BY