Title :
Active synchronization control for microgrid reconnection after islanding
Author :
Di Shi ; Yusheng Luo ; Sharma, Ratnesh K.
Author_Institution :
Energy Manage. Dept., NEC Labs. America, Inc., Cupertino, CA, USA
Abstract :
Microgrid (MG) islanding is considered as an effective measure to minimize power outage and therefore to maximize usage of renewable energy resources. One of the most challenging technical difficulties associated with islanding is out-of-phase reclosing caused by asynchronism of MG with the electric power system (EPS). In this paper, a novel control methodology is proposed to synchronize MG with the main power grid so that smooth transition from islanded mode to grid-tied mode can be guaranteed. Synchronization is achieved by eliminating the voltage phase angle difference across the circuit breaker/recloser at the point of common coupling (PCC). The proposed control employs synchrophasor measurements transmitted via Internet Protocol (IP) communications. A MG hardware testbed with multiple distributed generators and loads is built to validate the performance of the proposed method.
Keywords :
circuit breakers; distributed power generation; phasor measurement; power generation control; power grids; synchronisation; EPS; IP communications; Internet protocol communications; MG hardware testbed; MG islanding; PCC; active synchronization control; circuit breaker-recloser; electric power system; grid-tied mode; microgrid reconnection; multiple distributed generators; out-of-phase reclosing; point of common coupling; power grid; power outage minimization; renewable energy resources; synchrophasor measurements; voltage phase angle; Frequency control; Generators; Islanding; Microgrids; Phasor measurement units; Synchronization; Voltage control; Microgrid reconnection; PMU; islanded operation; out-of-phase reclosing; synchronization;
Conference_Titel :
Innovative Smart Grid Technologies Conference Europe (ISGT-Europe), 2014 IEEE PES
Conference_Location :
Istanbul
DOI :
10.1109/ISGTEurope.2014.7028802