NDLI: Multistring Five-Level Inverter With Novel PWM Control Scheme for PV Application

Content Provider	IEEE Xplore Digital Library
Author	Rahim, N.A. Selvaraj, J.
Copyright Year	1982
Abstract	This paper presents a single-phase multistring five-level photovoltaic (PV) inverter topology for grid-connected PV systems with a novel pulsewidth-modulated (PWM) control scheme. Three PV strings are cascaded together in parallel configuration and connected to a five-level inverter to produce output voltage in five levels: zero, +1/2V _dc, V _dc, -1/2V _dc, and -V _dc. Two reference signals that were identical to each other with an offset that was equivalent to the amplitude of the triangular carrier signal were used to generate PWM signals for the switches. DSP TMS320F2812 is used to implement this PWM switching scheme together with a digital proportional-integral current control algorithm. The inverter offers much less total harmonic distortion and can operate at near-unity power factor. The validity of the proposed inverter is verified through simulation and implemented in a prototype. The experimental results are compared with a conventional single-phase multistring three-level grid-connected PWM inverter.
Sponsorship	IEEE Industrial Electronics Society
Starting Page	2111
Ending Page	2123
Page Count	13
File Size	2361025
File Format	PDF
ISSN	02780046
Volume Number	57
Issue Number	6
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-06-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Pulse width modulation inverters Pulse width modulation Photovoltaic systems Solar power generation Topology Pulse inverters Control systems Voltage Signal generators Switches proportional–integral (PI) current control Grid-connected multilevel inverter multistring photovoltaic (PV) pulsewidth-modulated (PWM) inverter
Content Type	Text
Resource Type	Article
Subject	Control and Systems Engineering Electrical and Electronic Engineering Computer Science Applications

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