Mathematical model for transient calculation in a three-phase current inverter with two-stage switching

  • Khushnud Sapaev, Shukhrat Umarov,Dilmurod Rakhmatov

Abstract

Based on the operator method, a mathematical model for the calculation of transients in a threephase current inverter with two-stage switching is proposed. The model allows the calculation of
transients when the input voltage of the inverter changes, when the load changes, and also when the
It is shown that in the schemes of three-phase converters, due to the topological symmetry in phases,
the same equivalent circuit, as the type, turns out to be fair and can be used to analyze processes with
the same combination of switched-on valves with different numbers. Therefore, operator equivalent
circuits are compiled for certain combinations of numbers of valves turned on and are used to
calculate the process at the necessary stage for all phases, that is, all elements of the circuit. To
facilitate the programming and calculation procedure, a universal correspondence matrix is
proposed. This matrix can be used to calculate three-phase autonomous current inverters (ACI) of the
following topologies: parallel ACI, parallel-series ACI, series-parallel ACI, series ACI, ACI with
shut-off valves and ACI with two-stage switching. It has been revealed that six types of equivalent
circuits are the basis for calculating the transition process of ACI with TC, various combinations of
which represent the development paths of transient processes at clock intervals.

Published
2020-06-01
How to Cite
Khushnud Sapaev, Shukhrat Umarov,Dilmurod Rakhmatov. (2020). Mathematical model for transient calculation in a three-phase current inverter with two-stage switching. International Journal of Advanced Science and Technology, 29(7), 9367-9373. Retrieved from http://sersc.org/journals/index.php/IJAST/article/view/26421
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Articles