NDLI: Mitigation of Lower Order Harmonics in a Grid-Connected Single-Phase PV Inverter

Content Provider	IEEE Xplore Digital Library
Author	Kulkarni, A. John, V.
Copyright Year	1986
Abstract	In this paper, a simple single-phase grid-connected photovoltaic (PV) inverter topology consisting of a boost section, a low-voltage single-phase inverter with an inductive filter, and a step-up transformer interfacing the grid is considered. Ideally, this topology will not inject any lower order harmonics into the grid due to high-frequency pulse width modulation operation. However, the nonideal factors in the system such as core saturation-induced distorted magnetizing current of the transformer and the dead time of the inverter, etc., contribute to a significant amount of lower order harmonics in the grid current. A novel design of inverter current control that mitigates lower order harmonics is presented in this paper. An adaptive harmonic compensation technique and its design are proposed for the lower order harmonic compensation. In addition, a proportional-resonant-integral (PRI) controller and its design are also proposed. This controller eliminates the dc component in the control system, which introduces even harmonics in the grid current in the topology considered. The dynamics of the system due to the interaction between the PRI controller and the adaptive compensation scheme is also analyzed. The complete design has been validated with experimental results and good agreement with theoretical analysis of the overall system is observed.
Sponsorship	IEEE Power Electronics Society
Starting Page	5024
Ending Page	5037
Page Count	14
File Size	2085121
File Format	PDF
ISSN	08858993
Volume Number	28
Issue Number	11
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-11-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Harmonic analysis Inverters Topology Circuit faults Current control Transfer functions Voltage control solar energy Adaptive filters harmonic distortion inverters
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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