High efficiency H6 single-phase transformerless grid-tied PV inverter with proposed modulation for reactive power generation

Fahad M. Almasoudi; Khaled S. Alatawi; Mohammad Matin

doi:10.1117/12.2275572

23 August 2017 High efficiency H6 single-phase transformerless grid-tied PV inverter with proposed modulation for reactive power generation

Fahad M. Almasoudi, Khaled S. Alatawi, Mohammad Matin

Author Affiliations +

Proceedings Volume 10381, Wide Bandgap Power Devices and Applications II; 103810D (2017) https://doi.org/10.1117/12.2275572
Event: SPIE Optical Engineering + Applications, 2017, San Diego, California, United States

Abstract

Implementation of transformerless inverters in PV grid-tied system offer great benefits such as high efficiency, light weight, low cost, etc. Most of the proposed transformerless inverters in literature are verified for only real power application. Currently, international standards such as VDE-AR-N 4105 has demanded that PV grid-tied inverters should have the ability of controlling a specific amount of reactive power. Generation of reactive power cannot be accomplished in single phase transformerless inverter topologies because the existing modulation techniques are not adopted for a freewheeling path in the negative power region. This paper enhances a previous high efficiency proposed H6 trnasformerless inverter with SiC MOSFETs and demonstrates new operating modes for the generation of reactive power. A proposed pulse width modulation (PWM) technique is applied to achieve bidirectional current flow through freewheeling state. A comparison of the proposed H6 transformerless inverter using SiC MOSFETs and Si MOSFTEs is presented in terms of power losses and efficiency. The results show that reactive power control is attained without adding any additional active devices or modification to the inverter structure. Also, the proposed modulation maintains a constant common mode voltage (CM) during every operating mode and has low leakage current. The performance of the proposed system verifies its effectiveness in the next generation PV system.

Citation Download Citation

Fahad M. Almasoudi, Khaled S. Alatawi, and Mohammad Matin "High efficiency H6 single-phase transformerless grid-tied PV inverter with proposed modulation for reactive power generation", Proc. SPIE 10381, Wide Bandgap Power Devices and Applications II, 103810D (23 August 2017); https://doi.org/10.1117/12.2275572

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available