Analysis of Three-Phase Delta-Connected Converter for Compensation of Unsymmetrical Loads

The paper presents possibilities of compensation of general single-phase load connected to the three-phase grid. The compensation is to ensure a symmetrical and pure active load of the three-phase grid. It is documented that after the proposed compensation it is possible to draw symmetrical and pure...

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Bibliographic Details
Main Authors: Bejvl, Martin, Simek, Petr, Valouch, Viktor, Hauptmann, Radim
Format: Conference Proceeding
Language:English
Subjects:
Automatic voltage control
Control systems
Current control
Frequency conversion
Inverters
Load modeling
Mathematical model
multi-level voltage converter
single-phase load
three-phase grid
unbalance compensation
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Summary:The paper presents possibilities of compensation of general single-phase load connected to the three-phase grid. The compensation is to ensure a symmetrical and pure active load of the three-phase grid. It is documented that after the proposed compensation it is possible to draw symmetrical and pure active current from all phases. A set of multi-level voltage converters is considered as a compensation device. The paper presents a way of determining the reference currents for the converter in its two branches and proposes a method of controlling the converter so that the active power from the grid is equal to the active load of the load. This methodology is documented by the results of a series of simulations for static and dynamic modes of the system.
ISSN:2376-5631
DOI:10.1109/EPE51172.2020.9269256