Method for directly identifying continuous time model of thyristor control reactor (TCR)-type reactive compensation device

Abstract

The invention provides a method for directly identifying a continuous time model of a thyristor control reactor (TCR)-type reactive compensation device. The method comprises the following steps of: sampling input data and three-phase current data and three-phase voltage data of the reactive compensation device; calculating reactive power sent by the reactive compensation device by utilizing the instantaneous reactive power theory, and saving the input data sampled at each moment and corresponding reactive power data; designing a low pass filter and performing filtering on the input data and the reactive power data so as to obtain new input data and reactive power data, and saving the filtered data as a data set; and performing model parameter identification on the filtered data set by utilizing the least square method so as to obtain the accurate continuous time model of the reactive compensation device. According to the method, the sampled data are real and accurate, and the input data and output data are processed through the low pass filter, and thus, the influence of measurement noise on parameters is eliminated, and the accurate continuous time model between an amplification coefficient and the reactive power of the TCR-type dynamic reactive compensation device can be rapidly obtained.

Description

technical field [0001] The invention relates to the design of a dynamic reactive power compensation device in an electric power supply system, in particular to a method for directly identifying a continuous time model of a TCR type reactive power compensation device. Background technique [0002] TCR (Thyristor Control Reactor, Thyristor Control Reactor) type reactive power compensation device is widely used in steel, metallurgy and other industrial power systems due to its fast response characteristics. The conventional TCR reactive power compensator control strategy often adopts PID control Due to the lack of mathematical models of reactive power compensators, designers cannot use the knowledge of control theory to obtain good dynamic and static characteristics through zero-pole position design and frequency domain analysis. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a direct identification method of the c...

AI Technical Summary

Problems solved by technology

[0002] TCR (Thyristor Control Reactor, Thyristor Control Reactor) type reactive power compensation device is widely used in steel, metallurgy and other industrial power systems due to its fast response characteristics. The conventional TCR reactive power compensator control strategy often adopts PID control Due to the lack of mathematical models of reactive power compensators, designers cannot use control theory knowledge to obtain good dynamic and static characteristics through zero-pole position design, frequency domain analysis, etc.

Images