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

Abstract

The invention provides a method for identifying a 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 sampled data at each moment and corresponding reactive power data as a data set; performing model parameter identification on the obtained data set by utilizing a least square method so as to obtain an accurate discrete time model; and converting the obtained discrete time model into a continuous time model. According to the method provided by the invention, the acquisition of identification data is performed on the basis that a system open loop safely runs; the sampled data are real and accurate; the accurate discrete time model between an amplification coefficient and the reactive power of the TCR-type dynamic reactive compensation device can be obtained through the least square method; and the obtained discrete time model approaches to real system accuracy and reaches at least 90 percent, so that the continuous time model obtained by conversion is extremely reliable.

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 model identification method for a TCR type reactive power compensation device. technical background [0002] TCR (Thyristor Control Reactor, TCR) type reactive power compensation device has been widely used in industrial power systems such as steel and metallurgy due to its fast response characteristics. The conventional TCR reactive power compensator control strategy often uses the PID control algorithm, because Lacking the mathematical model of reactive power compensator, it is difficult for designers to use PID controller to obtain good dynamic and static characteristics. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a model identification method of a TCR type reactive power compensation device to provide designers with an accurate model for designi...

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Problems solved by technology

[0002] TCR (Thyristor Control Reactor, TCR) type reactive power compensation device has been widely used in industrial power systems such as steel and metallurgy due to its fast response characteristics. The conventional TCR reactive power compensator control strategy often uses the PID control algorithm, because Lack of mathematical model of reactive power compensator, it is difficult for designers to use PID controller to obtain good dynamic and static characteristics

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