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Publication type: Conference paper
Type of review: Peer review (publication)
Title: Analysis of a three-phase AC chopper with high power factor for the use in “PV-to-Heat” applications
Authors: Räber, Manuel
Heinzelmann, Andreas
Oliapuram, Jimmy
et. al: No
DOI: 10.21256/zhaw-18668
Proceedings: Proceedings : IECON 2019 - 45th Annual Conference of the IEEE Industrial Electronics Society
Conference details: IECON 2019, Lisbon, Portugal, 14 - 17 October 2019
Issue Date: 2019
Publisher / Ed. Institution: IEEE
ISBN: 978-1-7281-4878-6
Language: English
Subject (DDC): 621.04: Energy engineering
Abstract: The decreasing cost of photovoltaic (PV) systems allows the production of cheap renewable electricity. This has led to an increasing number of installed systems during the past years. Since the storage of electrical energy is still rather expensive, the optimization of the self-consumption coverage gains importance. One solution to higher self-consumption is a method called “PV-to-Heat”, where excess PV energy is not fed into the grid but stored in the form of hot water in the domestic boiler. This article describes a simplified hardware approach for a three-phase PWM chopper for AC/AC conversion. It is suited for low inductive loads like electric heaters. Compared to existing systems, the proposed converter design offers equal or better performance at very low cost and small size. The circuit allows full control of the power flow and provides sinusoidal and symmetrical load currents. The average electrical efficiency is 94.7% for a 6 kW test system. Unlike certain commercial products, there is no need to use a custom heater or access the star point of the load resistor.
Further description: ​© 2019 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
Fulltext version: Accepted version
License (according to publishing contract): Licence according to publishing contract
Departement: School of Engineering
Organisational Unit: Institute of Energy Systems and Fluid Engineering (IEFE)
Appears in collections:Publikationen School of Engineering

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