Novel FCS-MPC low switching frequency control method

A technology with low switching frequency and control method, which is applied in output power conversion devices, high-efficiency power electronic conversion, electrical components, etc., can solve the problems of heavy controller calculation burden, difficult to set weight coefficients, and increased prediction calculation amount. Achieve the effect of not increasing the computational burden, reducing the system switching frequency, and avoiding switching

Active Publication Date: 2017-07-21
江苏科路电气有限公司
View PDF0 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has a clear concept and is easy to understand, but there is a problem that the weight coefficient is difficult to set, and it can only achieve low switching frequency control in one control cycle in the future
To achieve low switching frequency control in multiple control cycles in the future, the existing method is to adopt a multi-step predictive control method, but the multi-step predictive method will increase the amount of predictive calculations exponentially, resulting in a heavy computational burden on the controller, which is difficult to achieve. accomplish
[0004] From t

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
  • Novel FCS-MPC low switching frequency control method
  • Novel FCS-MPC low switching frequency control method
  • Novel FCS-MPC low switching frequency control method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0031] Below in conjunction with accompanying drawing, the present invention will be further described with traditional weight factor method high-power multilevel inverter FCS-MPC system, the specific implementation steps of this novel FCS-MPC low switching frequency control method are as follows:

[0032] 1) detect t k Actual current value at any time;

[0033] 2) Apply the new FCS-MPC low switching frequency control method to the optimal switching vector s(k) predicted by the cycle, that is, the optimal switching vector selected by the controller in step 6) in the previous cycle (the optimal switching vector of the first cycle vector starts from zero vector);

[0034] 3) Delay compensation, predict t under the action of s(k) k+1 current value i p (t k+1 ), ①;

[0035]

[0036] In the formula

[0037] 4) Novel low switching frequency current prediction based on prediction time domain extension i p (t k+3 ), ②;

[0038]

[0039] 5) In order to reflect the vers...

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 provides a novel FCS-MPC low switching frequency control method, and relates to the field of the control of electric power and electronic converters. The method includes following steps: sampling a practical value and applying an optimal switch combination selected at the previous period; controlling time-delay compensation; realizing current prediction in two future control periods based on a prediction time domain extending principle; evaluating the selected effective switch combination according to a system value function, and selecting the optimal switch combination for the effect in the next control period; and repeating the above process in the next control period. According to the method, unnecessary switching of switches between adjacent control periods is effectively avoided, the switching frequency of the system is reduced, the method is not limited by an electric power and electronic converter topology structure and a prediction model and is irrelevant to the problem of setting of a weight factor, the algorithm concept is clear, the realization is easy, the operation burden of the control system is not increased, and the dynamic performance of the control system is not affected.

Description

technical field [0001] The invention relates to the technical field of power electronic converter control, in particular to a low switching frequency control method suitable for an FCS-MPC control system. Background technique [0002] For power electronic converters, especially high-power multi-level frequency conversion devices, the switching loss of switching devices has become the most important power loss part of the frequency conversion device with the increase of its voltage level and power level. The low switching frequency operation of the device can not only effectively reduce its own power loss, but also help to increase the output power of the device and improve its output current capability. Therefore, the development of high-power multi-level power electronic converters and their popularization and application in energy saving and consumption reduction must first solve the problem of low switching frequency control. [0003] In the power electronic converter co...

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): H02M1/00
CPCH02M1/00H02M1/0003H02M1/0048Y02B70/10
Inventor 王贵峰吴玮夏正龙朱呈祥胡福年邹宽胜闫俊荣李春杰李洪美金鑫尚睿赵强
Owner 江苏科路电气有限公司
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