DocumentCode :
3599561
Title :
Master-slave second order sliding mode control for microgrids
Author :
Cucuzzella, Michele ; Incremona, Gian Paolo ; Ferrara, Antonella
Author_Institution :
Dipt. di Ing. Ind. e dell´Inf., Univ. of Pavia, Pavia, Italy
fYear :
2015
Firstpage :
5188
Lastpage :
5193
Abstract :
This paper deals with the design of advanced control strategies of sliding mode type for microgrids. Each distributed generation unit (DGu), constituting the considered microgrid, can work in both grid-connected and islanded operation mode. The DGu is affected by load variations, nonlinearities and unavoidable modelling uncertainties, because of the presence of a voltage-sourced-converter (VSC) as interface with the main grid. This kind of uncertainty terms makes the sliding mode controller perfectly fitting the control problem to solve. In particular, a second order sliding mode (SOSM) control scheme, belonging to the class of Suboptimal SOSM control, is proposed. Moreover, in order to face some undesired overshoot on the currents fed into the load, due to the reconnection to the main grid, as well as to step variations of current references, a constrained SOSM control is designed. Simulation results confirm that the proposed robust controllers provide closed-loop performance complying with the IEEE recommendations for power systems.
Keywords :
closed loop systems; control nonlinearities; control system synthesis; distributed power generation; power convertors; power distribution faults; robust control; suboptimal control; uncertain systems; variable structure systems; DGu; VSC; closed-loop performance; constrained SOSM control design; control strategy design; current overshoot; current references; distributed generation unit; grid-connected operation mode; islanded operation mode; load variations; main-grid reconnection; master-slave second order sliding mode control; microgrids; nonlinearities; power systems; robust controllers; suboptimal SOSM control; unavoidable modelling uncertainties; uncertainty terms; voltage-sourced-converter; Load modeling; Master-slave; Microgrids; Pi control; Robustness; Uncertainty; Voltage control;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
American Control Conference (ACC), 2015
Print_ISBN :
978-1-4799-8685-9
Type :
conf
DOI :
10.1109/ACC.2015.7172149
Filename :
7172149
Link To Document :
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