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UPS three-phase PWM voltage source inverter based on auto-disturbance rejection control and control method

A voltage source inverter, active disturbance rejection controller technology, applied in electrical components, output power conversion devices, AC power input conversion to DC power output and other directions, can solve the problem that the inverter cannot generate high-quality voltage, Can not prevent problems such as harmonics, and achieve the effect of improving anti-disturbance ability, simple algorithm and easy implementation

Inactive Publication Date: 2018-09-18
WUHAN UNIV OF TECH
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Problems solved by technology

But since a single PR controller cannot stop all harmonics, it may not be able to make the inverter generate high quality voltage
[0007] These methods all take the method of partially linearizing the inverter, and then control the linearized model, but in fact, the inverter model has nonlinear characteristics.

Method used

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  • UPS three-phase PWM voltage source inverter based on auto-disturbance rejection control and control method
  • UPS three-phase PWM voltage source inverter based on auto-disturbance rejection control and control method
  • UPS three-phase PWM voltage source inverter based on auto-disturbance rejection control and control method

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Embodiment Construction

[0042] Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0043] This embodiment is realized through the following technical solutions. A UPS three-phase PWM voltage source inverter based on ADRC technology mainly includes an ADRC controller and a UPS three-phase PWM voltage source inverter. Among them, ADRC consists of three parts: Tracking Differentiator, TD, Extended State Observer, ESO, Nonlinear State Error Feedback, NLSEF. Among them, the UPS three-phase PWM voltage source inverter is the controlled object of the ADRC controller. The tracking differentiator TD decomposes the input signal of the system into differential signals in a broad sense of three states, and compares them with the corresponding differential signals of the feedback quantity to obtain a more reasonable comparison quantity, which can better solve the unsolvable response of the classical system The contradiction between speed and ove...

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Abstract

The invention relates to the technology of UPS voltage source inverters, in particular to a UPS three-phase PWM voltage source inverter based on auto-disturbance rejection control. The inverter comprises an auto-disturbance rejection controller ADRC and a UPS three-phase PWM voltage source inverter. The UPS three-phase PWM voltage source inverter is a controlled object of the auto-disturbance rejection controller ADRC. The auto-disturbance rejection controller ADRC comprises a tracking differential controller TD, an expansion state observer ESO, and a non-linear state error feedback controllerNLSEF. The input end of the tracking differential controller TD is connected with an input signal and the output end is connected with the input end of the non-linear state error feedback controllerNLSEF and the output end of the expansion state observer ES. The input end of the expansion state observer ES is connected with the input end of the UPS three-phase PWM voltage source inverter. The output end of the non-linear state error feedback controller NLSEF is connected with the output end of the expansion state observer ESO. According to the invention, the inverter has high stability and quite strong disturbance rejection ability.

Description

technical field [0001] The invention belongs to the technical field of UPS voltage source inverters, in particular to a UPS three-phase PWM voltage source inverter based on active disturbance rejection control and a control method. Background technique [0002] In recent years, the rapid development of various industries and fields has put forward higher and higher requirements for power supply quality, especially the requirements for power supply quality of important systems with strong real-time characteristics, important departments and important electrical equipment and my country's power grid The contradiction of the actual situation is becoming more and more acute. [0003] Uninterruptible power supply (UPS), as a green power supply with stable voltage, stable frequency and purification, has increasingly become the focus of people's attention. It is widely used to protect sensitive loads, such as: PCs, servers, medical equipment, communication systems In the event of p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/5387H02M7/5395
CPCH02M7/5387H02M7/5395
Inventor 熊和金钱开亮韩晓静
Owner WUHAN UNIV OF TECH
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