LADRC (linear active disturbance rejection controller) control based three-level shunt active power filter system

Abstract

An LADRC (linear active disturbance rejection controller) control based three-level shunt active power filter system is characterized by comprising a sampling and conditioning circuit unit, a DSP (digital signal processor) control unit, an IGBT (insulated gate bipolar transistor) isolation driving circuit unit, a protection circuit unit and a main circuit unit. A method of the LADRC control based three-level shunt active power filter system includes the steps of sampling and conditioning, DSP control processing, PWM (pulse width modulation) outputting, driving and transmitting. The control based three-level shunt active power filter system has the advantages that device design in simple, an advanced linear active disturbance rejection technology is adopted, high control accuracy is kept, system reliability is improved greatly, and the system has promising market prospect and engineering application value.

Description

(1) Technical field [0001] The invention belongs to the field of power system active filtering, and relates to a three-level parallel active power filter (Shunt Active Power Filter) controlled by a linear active disturbance rejection controller (Linear Active Disturbance Rejection Controller). (2) Background technology [0002] Electric energy, as a secondary energy source, has always played an important role in national life. With the rapid development of power electronic technology based on high-power diodes, IGBT, GTO and other power electronic devices, the power industry has also achieved tremendous further development. However, due to the extensive use of these power electronic devices in industrial production and daily life, the power quality problems caused by them are becoming more and more prominent, and the most influential one is the harmonic problem. At the same time, more and more industries have higher and higher requirements for power quality, which leads to ...

AI Technical Summary

Problems solved by technology

However, when proportional-differential-integral control technology was produced, the level of science and technology at that time was not enough to support its use of advanced digital signal processing technology to improve its control performance, so proportional-integral-differential control entered engineering practice with defects

The defect of the classical proportional-integral-derivative controller is largely due to its signal processing being too simple and not giving full play to the advantages of its control

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