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

A power filter, three-level technology, applied in active power filtering, AC network to reduce harmonics/ripples, etc., can solve problems such as insufficient control

CN104362633AInactive Publication Date: 2015-02-18TIANJIN UNIVERSITY OF TECHNOLOGY
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2015-02-18
Estimated Expiration
Not applicable · inactive patent

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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.
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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 ...

Examples

Embodiment

[0039] Embodiment: a kind of three-level parallel active power filter system based on LADRC control (see figure 1 ), which is characterized in that it is composed of a sampling conditioning circuit unit, a DSP (Digital Signal Processor—Digital Signal Processor) control unit, an IGBT isolation drive circuit unit, a protection circuit unit, and a main circuit unit; wherein the sampling conditioning The input end of the circuit collects grid voltage and current signals, and its output end is connected to the input end of the DSP control unit; the input end of the main circuit collects the DC side bus voltage and the driving signal of the IGBT isolation drive circuit unit, and its output end is respectively connected to the DSP The control unit is connected to the input end of the protection circuit unit; the input end of the DSP control unit is also connected to the output end of the protection circuit unit, and its output end is connected to the input end of the IGBT isolation d...