Title :
Comparative study of topologies of single phase static converters for grid connected PV systems
Author :
Sakly, J. ; Ben Abdelghani-Bennani, A. ; Slama-Belkhodja, I. ; Sammoud, H. ; Orabi, M.
Author_Institution :
Lab. des Syst. Electr., Univ. de Tunis El Manar, Tunis le Belvédère, Tunisia
Abstract :
The elimination of the transformer of the connection of a PV installation doesn´t only reduce the cost, size and weight, but also improves the efficiency of PV system installation. However, removal of the transformer causes the loss of electrical isolation between the PV generator and the grid. In this paper, a transformer less single-phase single stage grid connected PV system is proposed. A control algorithm for both the maximum extraction of the power and control of current injected into the grid is described. Also, a detailed comparative study of four converters topologies is elaborated showing the interest of the NPC structures against the problem caused by the common mode currents especially in the absence of transformers.
Keywords :
electric current control; photovoltaic power systems; power control; power convertors; power generation control; power grids; NPC structure; PV installation; common mode current control; cost reduction; electrical isolation loss; maximum power extraction; single phase static converter topology; transformer less single-phase single stage grid connected PV generator system; Frequency locked loops; Gold; Integrated circuit modeling; Maximum power point trackers; Modulation; Synchronization; Topology; MPPT (Maximum Power Point Tracking); Photovoltaic; common mode current; common mode voltage; grid connected; single-stage; transformer;
Conference_Titel :
Electrical Sciences and Technologies in Maghreb (CISTEM), 2014 International Conference on
DOI :
10.1109/CISTEM.2014.7076956
