A New Family of Multi-Input Converters Based on Three Switches Leg

Abstract

Multi-terminal converters eliminate using several single-input-single-output converters and simplify their topologies and reduce their cost. In this paper, a new family of multi-input converters based on three switches leg is introduced. Inputs of the proposed converters are similar and they are topologically interchangeable and have boost or buck operation modes. The proposed converter has one output which operates as an inverter. Here, all operating modes of the proposed converters and their effects on each other are investigated, in details. Also, an appropriate switching technique for the converters is given. A detailed comparison between conventional and proposed two-input converters is also presented. A two-input, one-output prototype converter has been implemented to validate the given analyses and to verify the proposed converter's performance. The experimental results are in good agreement with the theoretical and simulated analyses. Index Terms-dc-ac power conversion, multi-input converter, nine-switch inverter, three-switch leg converter.

Non-Isolated High-Gain Triple Port DC–DC Buck-Boost Converter With Positive Output Voltage for Photovoltaic Applications

“…Nonetheless, due to the absence of the bi-directional port, these topologies are not suitable for the battery-powered system. A new family of multi-input converters based on three switches leg introduced in [11]. Depending on the switching states, the converters have three modes of operations; buck, boost and inverter mode.…”

Multi-Input Ćuk-Derived Buck-Boost Voltage Source Inverter for Photovoltaic Systems in Microgrid Applications

“…However, a consistent performance evaluation of the Ćuk-derived BBVSI is still missing and requires an investigation of the system behavior, especially when operated as a multi-input inverter. A family of multi-input converters based on three switches leg has been presented in [28], where one of the inputs should be a battery and the other ones could be PV generators with either buck mode or boost mode operation, depending on the status of the battery. One drawback of this approach is a reduced overall conversion gain.…”

“…One drawback of this approach is a reduced overall conversion gain. The main contribution of this paper is introducing and analyzing single-stage three-phase multi-input CBBVSI for distributed PV systems that can be A family of multi-input converters based on three switches leg has been presented in [28], where one of the inputs should be a battery and the other ones could be PV generators with either buck mode or boost mode operation, depending on the status of the battery. One drawback of this approach is a reduced overall conversion gain.…”

Wind Farm Grid Integration Architecture using Unified Expandable Power Converter

“…In recent years, various converters have been introduced for use on VSWT driven PMSG. These converters can be divided into three categories: a) Multi-level converters [15]- [18], b) Special converters [19][20][21], and c) Multi-port converters [22]- [26]. In [15], a three-phase parallel grid-tied multi-level converter including a second-to tenth-free harmonics pulse width and height modulation (PWHM) switching scheme is presented.…”

“…By considering the effects of Vienna rectifier voltage on the PMSG's torque and flux, direct torque control of the PMSG is presented. A medium frequency link isolation transformer based interface converter for grid integration of a wind turbine generator and battery energy storage system (BESS) has been reported in [21] and in [22] where a three switches leg based multi-input converter is proposed. In this topology, the number of inputs is increased without using multi-input transformers.…”