Title :
Research on PQ Control Strategy for PV Inverter in the Unbalanced Grid
Author :
Hui Cao ; Hui Zhang ; Wentao Jiang ; Santong Wei
Author_Institution :
Sch. of Autom. & Inf. Eng., Xi´an Univ. of Technol., Xi´an, China
Abstract :
Aimed at the problem that the photovoltaic grid inverter output asymmetry current in the case of the grid voltage unbalance of the micro-grid, through the analysis of the inverter output characterization under the unbalanced conditions.Adopt double-loop dq control to carry out positive and negative sequence separation, respectively positive and negative sequence current are feedforward decoupling controlled, in order to offset the negative sequence current, and achieve the purpose of grid current balance.
Keywords :
distributed power generation; feedforward; invertors; power supply quality; PQ control strategy; PV inverter; double-loop dq control; feedforward decoupling; grid current balance; grid voltage unbalance; microgrid; negative sequence current; negative sequence separation; photovoltaic grid inverter output asymmetry current; positive sequence current; positive sequence separation; Feedforward neural networks; Inverters; Mathematical model; Photovoltaic systems; Vectors; Voltage control;
Conference_Titel :
Power and Energy Engineering Conference (APPEEC), 2012 Asia-Pacific
Conference_Location :
Shanghai
Print_ISBN :
978-1-4577-0545-8
DOI :
10.1109/APPEEC.2012.6307159
