A Method for Dynamically Identifying Equivalent Mathematical Model Parameters of Power Electronic System Based on Digital Filter

Abstract

In practice, most mathematical calculations and analysis methods to study the transients of power electrical equipment are based on the use of its idealized mathematical description and, as a result, do not adequately reflect the real dynamic characteristics of the combined power systems. One of the reasons, the use of unreliable initial parameters of the mathematical model during numerical experiments. In this article, a method is developed, the synthesis of equivalent models of a given structure is carried out using methods of parametric identification of dynamic systems. Digital filters designed to increase the reliability of the measurement and information part of modern microprocessor systems are described. There is also an assessment of their speed and error in the numerical solution of the problem of restoring useful and primary electrical signals, as well as methodological and practical recommendations for choosing the sampling frequency of analog-digital transformations in time are given.

A Research Method of IGBT Non-Stationary Mode for Power and Electrical Equipment Control

“…When creating a mathematical description of the transient processes of power electrical equipment, the main provisions of the theory of stationary, non-stationary and non-linear filtering of signals, methods of the theory of analysis and synthesis of linear and nonlinear electrical circuits, as well as methods of the theory of electromagnetic, electromechanical transient processes and the stability of electric power systems are used. The methodology consists in conducting numerical experiments to study the dynamic nonlinear characteristics of power electrical equipment and its control and automation tools Studies to identify the features of the dynamic properties and electrophysical characteristics of IGBT modules that are part of the power converter devices are carried out in non-stationary (including emergency) modes of electromagnetic and electromechanical frequency and power conversion [2][3][4][5][6].…”