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Title: Single Active Switch PV Inverter

Abstract

This report presents a new PV inverter topology that uses only one active switch instead of 7 active switches in a conventional PV inverter. It has a buck boost converter and operates at discontinuous current control mode, which can reduce the output stage from an active switch bridge to a thyristor bridge. This concept, if successfully demonstrated, may have great cost and size/weight benefits over conventional solutions. Since the proposed topology is completely different from the traditional boost converter plus voltage source inverter approach, there is no existing control/modulation scheme available. A new modulation scheme for both the main switch and the thyristors has been developed. An active clamping circuit has also been proposed to reduce switching losses and voltage spike during the switching transient. A simulation model has been set up to validate the control algorithm and clamping circuit. Simulated results show that a proposed 10 kW PV inverter can reach 5% total harmonic distortion (THD), 98.8% peak efficiency with only one main active switch, and an inductor weighing less than 3 kg. Based on that, a 10 kW prototype converter has been designed and built.

Authors:
 [1];  [1]
  1. ABB Inc., Raleigh, NC (United States)
Publication Date:
Research Org.:
ABB Inc., Raleigh, NC (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Solar Energy Technologies Office (EE-4S)
OSTI Identifier:
1389842
Report Number(s):
ABB SASPI Final
DOE Contract Number:  
EE0007591
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
14 SOLAR ENERGY; Solar PV Inverter; Active Switch; Thyristor; Control and modulation schemes

Citation Formats

Ramanan, V. R., and Pan, Zhiguo. Single Active Switch PV Inverter. United States: N. p., 2017. Web.
Ramanan, V. R., & Pan, Zhiguo. Single Active Switch PV Inverter. United States.
Ramanan, V. R., and Pan, Zhiguo. Wed . "Single Active Switch PV Inverter". United States. doi:.
@article{osti_1389842,
title = {Single Active Switch PV Inverter},
author = {Ramanan, V. R. and Pan, Zhiguo},
abstractNote = {This report presents a new PV inverter topology that uses only one active switch instead of 7 active switches in a conventional PV inverter. It has a buck boost converter and operates at discontinuous current control mode, which can reduce the output stage from an active switch bridge to a thyristor bridge. This concept, if successfully demonstrated, may have great cost and size/weight benefits over conventional solutions. Since the proposed topology is completely different from the traditional boost converter plus voltage source inverter approach, there is no existing control/modulation scheme available. A new modulation scheme for both the main switch and the thyristors has been developed. An active clamping circuit has also been proposed to reduce switching losses and voltage spike during the switching transient. A simulation model has been set up to validate the control algorithm and clamping circuit. Simulated results show that a proposed 10 kW PV inverter can reach 5% total harmonic distortion (THD), 98.8% peak efficiency with only one main active switch, and an inductor weighing less than 3 kg. Based on that, a 10 kW prototype converter has been designed and built.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Wed Sep 13 00:00:00 EDT 2017},
month = {Wed Sep 13 00:00:00 EDT 2017}
}

Technical Report:
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