Title :
Hybrid control for micro-grid based on hybrid system theory
Author :
Dou, Chunxia ; Jia, Xingbei ; Bo, Zhiqian ; Liu, Dongle ; Zhao, Fang
Author_Institution :
Inst. of Electr. Eng., Yanshan Univ., Qinhuangdao, China
Abstract :
With the rapid increase in the rate of distributed generation (DG) penetration depth, the issues of improving micro-grid transient become more significant. This paper investigates a two-level hierarchical hybrid control consists of continuous local controller for each DG unit at the first level coordinated by discrete supervisory control strategies at the secondary level for transients performance enhancement of micro-grid with various DG units following pre-planned or accidental switching events. The discrete supervisory control strategies are established based on information fusion technique by using wide-area measurements (WAM) in order to coordinate switching each DG subsystem into apposite operation mode following large disturbances. The continuous local controller for each DG unit is designed based on multiple Lyapunov stability theory incorporating linear matrix inequality (LMI) techniques in order to regulate the set point of each DG subsystem to reach the best performance and acceptable operation indexes. The effectiveness of the proposed hybrid control is demonstrated through simulation examples.
Keywords :
Lyapunov methods; distributed power generation; linear matrix inequalities; power distribution control; power system measurement; DG penetration depth; DG subsystem; DG unit; LMI techniques; Lyapunov stability theory; WAM; continuous local controller; discrete supervisory control strategy; distributed generation penetration depth; hybrid system theory; linear matrix inequality techniques; microgrid hybrid control; microgrid transient; transient performance enhancement; two-level hierarchical hybrid control; wide-area measurements; Indexes; Power system stability; Reactive power; Stability criteria; Supervisory control; Switches; Transient analysis; DG; LMI; Micro-grid; continuous local controller; discrete supervisory control strategy; hybrid system theory; information fusion technique;
Conference_Titel :
Power and Energy Society General Meeting, 2011 IEEE
Conference_Location :
San Diego, CA
Print_ISBN :
978-1-4577-1000-1
Electronic_ISBN :
1944-9925
DOI :
10.1109/PES.2011.6039018