Title :
Research on grid-connected/islanding smooth switching of micro-grid based on energy storage
Author :
Yan-hua Liu ; Nan Zhang ; Xu Zhang
Author_Institution :
North China Electr. Power Univ., Beijing, China
fDate :
Oct. 30 2012-Nov. 2 2012
Abstract :
The micro-grid is an approach to solve distributed generations interconnecting with power grid. Wind-PV-ES hybrid system could make full use of clean energy and have high reliability. Smooth switching between grid-connected and islanding mode is important to micro-grid stable operation. This paper proposes an improved control strategy combining master-slave control with peer-to-peer control in order to make transition between grid-connected and islanding mode smoother. A micro-grid model based on wind-PV-ES hybrid system is built with DigSILENT/PowerFactory, and the improved control strategy is realized on it. The result shows that this improved control strategy can ensure power balance, and keep connected bus voltage and micro-grid frequency stable during micro-grid mode switching.
Keywords :
distributed power generation; energy storage; hybrid power systems; photovoltaic power systems; power generation control; power generation reliability; power system interconnection; power system stability; wind power plants; DigSILENT-PowerFactory; P-Q control; distributed generations; droop control; energy storage; grid-connected mode; islanding mode; master-slave control; microgrid frequency stability; microgrid mode switching; peer-to-peer control; photovoltaic power systems; power balance; smooth switching; wind-PV-ES hybrid system; Area measurement; Fluctuations; Lighting; Load modeling; Switches; Droop control; P-Q control; V-f control; Wind-PV-ES hybrid system;
Conference_Titel :
Power System Technology (POWERCON), 2012 IEEE International Conference on
Conference_Location :
Auckland
Print_ISBN :
978-1-4673-2868-5
DOI :
10.1109/PowerCon.2012.6401433
