Current controller for inverter bridge designed for grid-connected photovoltaic system

Miletic, Alista (2005) Current controller for inverter bridge designed for grid-connected photovoltaic system. [USQ Project]


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A grid-connected photovoltaic system provides electrical energy to the power grid from power generated by a solar system. The first requirement in connecting to the power grid is converting the DC voltage generated by the photovoltaic cells to AC. This is achieved using a single-phase switch-mode inverter. The next requirements are that the output frequency matches that of the grid to which it is connected and its current is near sinusoidal. Power supply authorities set stringent standards that limit the amount of DC delivered to the grid and therefore the inverter must be controlled to minimise the DC content of the sinusoidal output. To produce this waveform, the inverter is operated in unipolar mode and controlled using sinusoidal pulse-width modulation. This task is performed by a current controller circuit that controls the inverter output current by regulating the inverter transistor switching using tolerance band control.

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Item Type: USQ Project
Refereed: No
Item Status: Live Archive
Faculty/School / Institute/Centre: Historic - Faculty of Engineering and Surveying - Department of Electrical, Electronic and Computer Engineering (Up to 30 Jun 2013)
Date Deposited: 11 Oct 2007 00:22
Last Modified: 02 Jul 2013 22:32
Uncontrolled Keywords: bridges, inverter bridge, photovoltaic system, inverter circuit, controller circuit, current controller, solar energy
Fields of Research (2008): 09 Engineering > 0906 Electrical and Electronic Engineering > 090607 Power and Energy Systems Engineering (excl. Renewable Power)
09 Engineering > 0907 Environmental Engineering > 090703 Environmental Technologies
Fields of Research (2020): 40 ENGINEERING > 4008 Electrical engineering > 400805 Electrical energy transmission, networks and systems
40 ENGINEERING > 4011 Environmental engineering > 401102 Environmentally sustainable engineering

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