Wide area measurement system adaptive time-delay compensation method

A wide-area measurement system and time-delay compensation technology, which is applied in the field of time-delay adaptive prediction and compensation of wide-area measurement systems, to achieve the effects of avoiding the increase of prediction compensation errors, accurate prediction and compensation, and a simple and reliable method

Active Publication Date: 2015-09-09
STATE GRID CORP OF CHINA +3
View PDF5 Cites 18 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the method using prediction compensation, the length of prediction time is often set 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
  • Wide area measurement system adaptive time-delay compensation method
  • Wide area measurement system adaptive time-delay compensation method
  • Wide area measurement system adaptive time-delay compensation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0062] In order to verify the effectiveness of the prediction compensation method in the present invention, the WAMS delay of Zhejiang power grid was measured and calculated statistically; the time length of prediction compensation was determined by the statistical results, and the angular velocity in the measurement signal of the PMU substation was selected. (or unit frequency) signal and tie line power signal are predicted and compensated.

[0063] According to the first step of the present invention, the time delay data from each PMU substation to the WAMS main station is obtained by the time delay analysis and prediction compensation device installed in the PMU substation, and the average value μ of the time delay is calculated. delay and mean square error σ delay , and further obtain the time length of prediction compensation ΔT predict .

[0064] The data is preprocessed by the data preprocessing method in the second step, and the angular velocity (or unit frequency) s...

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

A wide area measurement system adaptive time-delay compensation method relates to a time-delay compensation method. At present, for methods adopting prediction compensation, the duration of prediction time is directly set at a fixed value according to experience, the adaptation is poor, and the prediction compensation error is large. The method provided by the invention comprises the following steps of determining the time-delay duration of prediction compensation required by each PMU substation of a wire area measurement system; selecting a corresponding measurement signal according to needs, performing prediction compensation, performing pretreatment of the measurement signal, wherein the pretreatment comprises detection and processing of abnormal data in historical data, detecting whether abnormal data occur by calculating whether the measurement signal data change rate is suddenly changed or not, and replacing the abnormal data when the abnormal data are detected; and a step of performing prediction compensation of data of the selected measurement signal. The time-delay compensation method of the technical scheme is simple and reliable, the calculation data size is small, the prediction compensation error is small, and accurate prediction compensation is achieved.

Description

technical field [0001] The present invention relates to a time delay compensation method, in particular to a wide area measurement system time delay adaptive prediction compensation method. Background technique [0002] The wide-area measurement system solves the problem of high-precision phasor synchronous measurement, and puts forward new ideas for introducing wide-area control to solve low-frequency oscillation, stable control between interconnected power grids, etc. Therefore, it is of great significance to explore the influence of time delay compensation technology on WAMS control system. [0003] In the current wide-area measurement system, when performing delay compensation, one is to directly design a time-delay robust controller, by improving the stability margin of the system itself to the delay; the other is a prediction-based compensation method, by The measured signal is predicted, and the predicted value is used as the input of the wide-area damping controller...

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): H02J13/00
CPCY02E60/00Y04S10/16
Inventor 吴秋晗杨博魏路平李永杰占震滨江全元戚军
Owner STATE GRID CORP OF CHINA
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