Parallel APF DC side voltage control method based on sliding mode PI compound control algorithm

A DC side voltage, compound control technology, applied in the direction of AC network circuits, electrical components, circuit devices, etc., can solve problems such as poor control accuracy, slow voltage response speed, and complex implementation.

Active Publication Date: 2017-03-29
CHONGQING CHUANYI AUTOMATION
View PDF6 Cites 14 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the traditional PI controller is used for DC side voltage control, although it can finally meet the DC voltage stability, the response speed of the voltage is slow, and there is overshoot, which cannot meet the needs when the load changes suddenly and the reference voltage jumps.
The fuzzy controller does not depend on the system, it is easy to transplant, and its robust performance is strong;...

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 more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Parallel APF DC side voltage control method based on sliding mode PI compound control algorithm
  • Parallel APF DC side voltage control method based on sliding mode PI compound control algorithm
  • Parallel APF DC side voltage control method based on sliding mode PI compound control algorithm

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0058] The present invention will be described in further detail below in conjunction with the embodiments and accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0059] figure 1 It is a block diagram of the parallel APF DC side voltage control based on the sliding mode PI compound control algorithm, and the specific steps of the parallel APF DC side voltage control method based on the sliding mode PI compound control algorithm:

[0060] (1) Establish a low-order system model of the parallel APF in the dq coordinate system;

[0061]

[0062] (2) Detect DC side capacitor voltage u dc , compare it with the DC side reference voltage value u dcref For comparison, the error signal is obtained, and the error signal is passed through the sliding mode PI controller to obtain the current reference value i of the current inner loop fd_ref , by checking the current actual value i of the current inner loop fd , put i fd_ref with i fd Th...

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

No PUM Login to view more

Abstract

The invention discloses a parallel APF DC side voltage control method based on a sliding mode PI compound control algorithm. The method comprises the following steps: firstly establishing a low-order system model of a dq coordinate system by using synchronous rotating coordinate transformation; determining the sliding mode switching function of the DC side voltage according to the selection principle of sliding mode surfaces; and finally designing the control parameter output function of a PI controller according to the switching function of the sliding mode surfaces. By adopting the control method disclosed by the invention, the steady state performance and response speed of the DC side voltage can be improved, and the voltage fluctuation can also be effectively reduced; and a parallel APF control system based on the sliding mode PI compound control algorithm has good robust performance and dynamic performance. According to the parallel APF DC side voltage control method based on the sliding mode PI compound control algorithm disclosed by the invention, the parameter of the PI controller is determined through the sliding mode controller, the steady state accuracy and response speed during load sudden change and reference voltage jump can be increased, the power loss at the DC side can be reduced, and thus the compensation ability of the parallel APF (active power filter) can be ensured.

Description

technical field [0001] The invention belongs to the field of active filter control, in particular to a parallel APF DC side voltage control method based on a sliding mode PI composite control algorithm. Background technique [0002] Parallel active power filter (Active Power Filter, APF) is an effective means to solve the harmonic pollution of the power grid. It can realize accurate, real-time and effective compensation for the harmonics, negative sequence current and reactive power existing in the power grid system. The output compensation characteristics of the active filter mainly depend on the control method of the current and voltage, and the main circuit topology of the converter device used. At present, the research on the topology of active power filters is relatively mature, and most of them adopt the structure of traditional three-phase PWM converters. Therefore, the improvement of the compensation performance of parallel active power filters mainly depends on the ...

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
no application Login to view more
IPC IPC(8): H02J3/18H02J3/01
CPCH02J3/01H02J3/1842H02J2203/20Y02E40/20
Inventor 马辉危伟王辉鄢圣阳官轲
Owner CHONGQING CHUANYI AUTOMATION
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap