NDLI: On the control and design issues of single phase transformerless inverters for photovoltaic applications

Content Provider	IEEE Xplore Digital Library
Author	Gupta, A.K. Joshi, M.S. Agarwal, V.
Copyright Year	2014
Description	Author affiliation: Dept. of Electr. Eng., IIT Bombay, Mumbai, India (Gupta, A.K.; Joshi, M.S.; Agarwal, V.)
Abstract	Design and development details of a high power density, low cost, single phase transformerless PV inverter with reduced losses are reported. H-4 bridge topology is adopted to implement the proposed design where count of power devices is limited to four. One leg of the bridge operates at high switching frequency while the other leg operates at line frequency, this modulation technique reduces the switching losses. This also obviates the requirement of fast recovery anti parallel diodes across power devices for low frequency leg. Use of fewer devices and digital control (instead of analog control) has led to reduced cost and size. Switching and conduction losses are further reduced by using MOSFETs with very low on state resistance. A novel control scheme has been implemented to eliminate the DC offset at the output. A highly reliable over current and shoot-through protection is implemented through digital control. The digital control algorithm implemented enhances the reliability of operation at high power level. Optimal design of PCB and high frequency filters with SMD components contribute to high power density. A 3 kW prototype has been developed and tested for various reactive loads. All the analysis, simulation and experimental details of this work are presented.
Starting Page	1
Ending Page	6
File Size	1084316
Page Count	6
File Format	PDF
ISBN	9781479960453
e-ISBN	9781479960460
DOI	10.1109/IICPE.2014.7115805
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-12-08
Publisher Place	India
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Single phase PV inverters Transformerless Inverter High power density Inverters Inverters Photovoltaic (PV) DC-AC Power conversion Topology Leakage currents Circuit faults Standards Power harmonic filters Phase transformers High efficiency inverter
Content Type	Text
Resource Type	Article

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