An Adaptive Dynamic Sliding Mode Method for Active Power Filter Based on Observer
A power filter and observer technology, applied in the direction of adaptive control, instruments, control/regulation systems, etc., can solve the problem of low current control accuracy, and achieve the effect of overcoming negative effects and high practicability
Active Publication Date: 2022-04-22
HOHAI UNIV CHANGZHOU
View PDF3 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0003] In order to solve the problem that the current control accuracy of the traditional control algorithm is not high, the present invention provides an adaptive dynamic sliding mode method for an active power filter based on an observer, which can realize fast and static-difference-free current tracking, and realize relatively Low grid current distortion rate
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0098] In order to enable those skilled in the art to better understand the technical solutions in the application, the technical solutions in the embodiments of the application are clearly and completely described below. Obviously, the described embodiments are only part of the embodiments of the application, and Not all examples. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.
[0099] figure 1 It is the schematic diagram of the present invention, figure 1 It shows that the harmonic current is detected from the load current by the sensor as the reference signal r. Firstly, a terminal function is designed to ensure the finite time convergence characteristics, and then the terminal function is used to construct the dynamic terminal sliding mode surface, and the equivalent control item can be obtained according to the des...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses an observer-based adaptive dynamic sliding mode method for an active power filter, comprising the following steps: S1, defining a switch function H , establish the dynamic equation of single-phase active power filter, define the state variables of the dynamic equation to obtain the second-order general mathematical model expression; S2, define the differential equation of the finite-time disturbance observer; S3, define the tracking error and its first-order Derivative, then define the dynamic terminal sliding mode surface, obtain the equivalent control item, and add the equivalent control item, switching control item and disturbance compensation item to obtain the ideal control law; S4, construct a double hidden layer recurrent neural network, use the neural network The optimal approximation characteristics of the switching control item are used to approximate the switching gain of the switching control item, and the adaptive sliding mode control law is obtained, and the stability is proved. The invention has good anti-interference and dynamic compensation ability, and can realize lower total harmonic distortion rate of power supply current.
Description
technical field [0001] The invention relates to an observer-based adaptive dynamic sliding mode method for an active power filter, which belongs to the technical field of intelligent control. Background technique [0002] The power grid system is the main energy source in production and life, and the existence of harmonic current will directly affect the safe and stable operation of the power grid system. It is a reliable method to solve the harmonic current by connecting an active power filter in parallel with the user grid. . However, the key technologies that limit the development of active power filters mainly include two points: first, how to accurately measure the reference harmonic current content in the grid system; second, how to design a current controller to achieve high-precision current tracking effects, That is, the harmonic compensation current tracks the harmonic reference current. The development of the theory of instantaneous reactive power has laid the f...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G05B13/04
CPCG05B13/027G05B13/042
Inventor 陈云费峻涛陈放
Owner HOHAI UNIV CHANGZHOU