Synchronous operation of dual-inverter-based photovoltaic system with low DC-voltages

Author

Griva, G. ; Oleschuk, V.

Author_Institution

Dept. of Electr. Eng., Politec. di Torino, Turin, Italy

fYear

2010

fDate

6-8 Sept. 2010

Firstpage

1

Lastpage

6

Abstract

Novel method of synchronized pulsewidth modulation (PWM) has been disseminated for control of cascaded (dual) inverters of photovoltaic installation with relatively low DC-voltages of two insulated photovoltaic panels, operating under condition of low level of solar irradiance. Control regimes are characterized by overmodulation control modes of two inverters in this case. Algorithms of synchronized PWM provide continuous voltage synchronization both in each inverter and in the load in the overmodulation control zone of inverters. Special attention has been given to analysis of operation of photovoltaic systems with different DC-voltages of two strings of photovoltaic panels. Results of simulations present a behavior of dual-inverter photovoltaic system with two discontinuous and one combined versions of synchronized PWM.

Keywords

PWM invertors; photovoltaic power systems; cascaded inverter control; dual-inverter-based photovoltaic system; insulated photovoltaic panels; overmodulation control modes; photovoltaic installation; photovoltaic panels; solar irradiance; strings DC voltage; synchronized PWM inverter; synchronized pulsewidth modulation; Inverters; Photovoltaic systems; Pulse width modulation; Switches; Synchronization; Voltage control; Photovoltaic power systems; pulse width modulated power converters; synchronization; voltage control;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Machines (ICEM), 2010 XIX International Conference on

Conference_Location

Rome

Print_ISBN

978-1-4244-4174-7

Electronic_ISBN

978-1-4244-4175-4

Type

conf

DOI

10.1109/ICELMACH.2010.5607917

Filename

5607917