Large power transformer self-adaptive active noise reduction control method and control system

A technology of adaptive controller and control method, applied in the direction of adaptive network, impedance network, electrical components, etc., can solve the problems of convergence speed and steady-state error performance contradiction

Active Publication Date: 2015-09-23
STATE GRID SHANDONG ELECTRIC POWER +1
View PDF3 Cites 23 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The quality of the adaptive controller control method plays a decisive role in the quality of the noise reduction effect. At present, in the traditional control algorithm, eac

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
  • Large power transformer self-adaptive active noise reduction control method and control system
  • Large power transformer self-adaptive active noise reduction control method and control system
  • Large power transformer self-adaptive active noise reduction control method and control system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0042] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0043] Such as figure 1 As shown, the high-power transformer adaptive active noise reduction control system includes a reference sensor, an error sensor and an adaptive controller, the reference sensor is connected to the input end of the adaptive controller through the first preamplifier, and the error sensor The input end of the adaptive controller is connected through the second preamplifier, and the output end of the adaptive controller is connected with the loudspeaker through the power amplifier. The reference sensor and the error sensor use condenser microphones.

[0044] The signals collected by the reference sensor and the error sensor are generally weak, so they must be amplified by the first preamplifier and the second preamplifier before they can be used as the input of the adaptive controller. Likewise, the signal output by the adaptive c...

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 large power transformer self-adaptive active noise reduction control method. The method comprises the steps that a sensor collects primary noise as a reference signal and transmits the reference signal to a self-adaptive controller, and the self-adaptive controller outputs, according to the reference signal, a control signal to be used as a secondary signal so as to drive a loudspeaker to give out secondary noise; a primary sound field established by the noise made by a power transformer and a secondary sound field established by secondary noise made by the loudspeaker overlap, and an error sensor collects the overlapped sound pressure and forms an error signal; and the self-adaptive controller receives the error signal, and then adjusts, according to a preset objective function, the phase and amplitude of the secondary signal by use of a least mean square (LMS) algorithm for converging coefficient variation till the error signal satisfies the objective function and achieves a stable state. Through adoption of the method, while the steady state error performance is guaranteed, the converging speed of the algorithm is improved, and the noise reduction effect can be improved; and the initial value of the convergence coefficient can be selected more freely.

Description

technical field [0001] The invention relates to the technical field of high-power transformer noise reduction, in particular to a high-power transformer adaptive active noise reduction control method and control system. Background technique [0002] Transformer noise is the sum of irregular, intermittent, continuous or random mechanical noise and air noise generated by the transformer body and cooling system during the body structure design, type selection layout, installation, and use. The noise generated by transformers widely affects residential areas, commercial centers, light stations, airports, factories and mines, enterprises, hospitals, schools and other places. With the improvement of people's environmental awareness and the restrictions on various types of noise by the environmental protection department, especially due to the continuous expansion of cities and the needs of urban power grid transformation, some substations are sometimes built in commercial and resi...

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): H03H21/00
Inventor 赵宝光李尚振赵信华田纯王霞刘锦泉亓占华何振华李秀红段伦峰
Owner STATE GRID SHANDONG ELECTRIC POWER
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