Modeling Method for Autonomous Current Inverters

---

Proc. of the International Conference on Electrical, Computer, Communications and Mechatronics Engineering (ICECCME)
16-18 November 2022, Maldives 
978-1-6654-7095-7/22/$31.00 ©2022IEEE 
Modeling Method for Autonomous Current 
Inverters
Shukhrat Umarov 
Department of Electro mechanics 
and Electrotechnology 
Tashkent State Technical University 
Tashkent, Uzbekistan 
[e-mail] 
Abstract. Modern development of converter engineering is 
connected with creation of autonomous electric energy converters 
and their application in various branches of industry. In most cases 
high requirements are set for reliability and technical performance 
of such converters. This type of converters are complex non-linear 
systems, so their in-depth research is impossible without a detailed 
description of processes based on their exact mathematical models. 
An important condition of model development is its ability to 
perform calculations of various dynamic transients to choose the 
optimal parameters of the circuit, providing the fulfilment of 
requirements of technical specification. The paper applies the 
method of mathematical modelling of valve electric circuits with 
piecewise linear approximation of valve characteristics. We 
propose the method of the mathematical modelling of valve 
converter based on autonomous current inverters (ACI), which is 
based on identifying all possible states of the converter power 
circuit followed by the formation of universal equivalent circuits of 
several states of the converter power circuit. Recurrence formulas 
for the required currents and voltages corresponding to each 
conductivity interval of the valve elements are presented. The 
proposed methodology of transient analysis of instantaneous 
currents and voltages in an autonomous current inverter is based on 
the Laplace transform rules. It can be used to calculate steady-state 
as well as transients in various types of valve inverters, regardless 
of the complexity of the power circuit, the load type, and control 
system features.