Title :
Implementing PCC voltage estimation utilising cascaded PI controllers in the dq rotating reference frame for microgrid inverter control
Author :
Rowe, Christopher N. ; Summers, T.J. ; Betz, R.E. ; Moore, Timothy G.
Author_Institution :
Sch. of Electr. Eng. & Comput. Sci., Univ. of Newcastle, Newcastle, NSW, Australia
Abstract :
Estimation of the Point of Common Coupling (PCC) voltage was proposed in [1] exploiting deadbeat control theory and a hybrid parallel voltage and current control algorithm. This paper extends previous research to provide a dq Rotating Reference Frame (RRF) cascaded PI voltage and current control structure utilising PCC voltage estimation. In an islanded microgrid, the use of PCC voltage estimation improves Q´ power sharing under mismatched line impedances compared to other current state of the art control schemes. SABER simulations and dSPACE hardware results are provided for a two inverter microgrid to validate the decrease in Q´ power imbalance achieved.
Keywords :
PI control; cascade control; distributed power generation; electric current control; electric impedance; power distribution control; voltage control; PCC voltage estimation; RRF cascaded PI voltage control; RRF cascaded current control structure; SABER simulations; cascaded PI controllers; current control algorithm; dSPACE hardware; deadbeat control theory; dq rotating reference frame; hybrid parallel voltage; inverter microgrid; microgrid inverter control; mismatched line impedances; point of common coupling voltage; power imbalance; power sharing; Estimation; Hardware; Impedance; Inverters; Microgrids; Reactive power; Voltage control; Distributed Generation; Microgrids; Power Electronics; Power Frequency Droop;
Conference_Titel :
Energy Conversion Congress and Exposition (ECCE), 2013 IEEE
Conference_Location :
Denver, CO
DOI :
10.1109/ECCE.2013.6646816
