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A multi-function grid connected PV system with three level NPC inverter and voltage oriented control

Authors
Journal
Solar Energy
0038-092X
Publisher
Elsevier
Publication Date
Volume
85
Issue
11
Identifiers
DOI: 10.1016/j.solener.2011.07.017
Keywords
  • Photovoltaic System
  • Ancillary Services
  • Three Level Inverter
  • Voltage Oriented Control
  • Reactive Power Compensation

Abstract

Abstract In this paper a grid connected photovoltaic (PV) system is presented. The grid integration of the PV system is carried out via a three phase three level neutral point clamped (NPC) inverter. To control the inverter a modified version of voltage oriented control (VOC) method and the space vector pulse width modulation (SVPWM) technique have been applied. With the proposed modification the PV system operates as a shunt active power filter (SAPF), a reactive power compensator, and a load’s current balancer simultaneously. In this way the PV system operates more efficiently compared to the conventional PV systems and offers ancillary services to electric power system. The effectiveness of the proposed control scheme is established through simulation results with Matlab/Simulink in steady state and transient response of the electric power distribution system.

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