DocumentCode :
1783602
Title :
Hierarchical coordinated control of distributed generators and active power filters to enhance power quality of microgrids
Author :
Savaghebi, Mehdi ; Hashempour, Mohammad M. ; Guerrero, Josep M.
Author_Institution :
Karaj Branch, Islamic Azad Univ., Karaj, Iran
fYear :
2014
fDate :
14-14 Oct. 2014
Firstpage :
259
Lastpage :
264
Abstract :
This paper addresses the coordinated control of distributed generators (DGs) inverters and active power filters (APFs) to compensate voltage harmonics in microgrids. For this, a hierarchical control system is proposed to mitigate voltage harmonic distortion. The hierarchical control structure includes two control levels: primary control and secondary control. Primary control consists of power controllers, selective virtual impedance loops and proportional-resonant (PR) voltage/current controllers. Secondary control manages the compensation of voltage harmonic distortion of sensitive load bus (SLB). Compensation of SLB harmonics by control of DGs may cause excessive voltage harmonics at the terminal of one or more of DGs interface inverters and/oroverloading of the inverters. After occurrence of each of these cases, active power filter (APF) participates in harmonic compensation and consequently the compensation efforts of DGs decrease to avoidexcessive harmonics or loading of DGs´ inverters. Effectiveness of the proposed control scheme is demonstratedthrough simulation studies.
Keywords :
active filters; distributed power generation; electric current control; harmonic distortion; invertors; power control; power generation control; power harmonic filters; power supply quality; voltage control; APF; DG interface inverters; PR voltage-current controllers; SLB harmonics; active power filters; distributed generator inverters; harmonic compensation; hierarchical control structure; hierarchical control system; hierarchical coordinated control; microgrids; power controllers; power quality; primary control; proportional-resonant voltage-current controllers; secondary control; selective virtual impedance loops; sensitive load bus; voltage harmonic distortion; voltage harmonics; Active filters; Harmonic analysis; Harmonic distortion; Impedance; Inverters; Power harmonic filters; Voltage control; Active power filter; hierarchical control; microgrid; power quality; selective virtual impedance; voltage harmonic distortion;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Power and Electrical Engineering of Riga Technical University (RTUCON), 2014 55th International Scientific Conference on
Conference_Location :
Riga
Print_ISBN :
978-1-4799-7460-3
Type :
conf
DOI :
10.1109/RTUCON.2014.6998222
Filename :
6998222
Link To Document :
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