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Missing data filling method and device

A missing data and data technology, applied in the field of missing data filling method and device, can solve the problems of power data missing, effective data reduction, continuous data missing, etc., to achieve the effect of alleviating the missing and increasing the amount of data

Active Publication Date: 2020-12-18
GUODIAN UNITED POWER TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In order to meet the above requirements, it is necessary to carry out reasonable data cleaning for the original wind speed and power data, and there will inevitably be a large number of missing power data after cleaning
Especially when a large amount of accumulated abnormal data caused by wind curtailment is cleaned and eliminated, a large number of continuous data will be missing, and the amount of available effective data will be greatly reduced

Method used

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  • Missing data filling method and device
  • Missing data filling method and device
  • Missing data filling method and device

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Embodiment 1

[0034]The embodiment of the present invention provides a method for filling missing data, such asfigure 1 A flowchart of a method for filling missing data is shown. The method includes the following steps:

[0035]Step S102: Obtain the wind farm operation data to be filled;

[0036]Wherein, the above-mentioned wind farm operation data includes wind power data after cleaning;

[0037]In actual use, according to the operating conditions of the existing power system, power-limited scheduling is a frequent occurrence of grid-connected wind power, which causes the data records of the wind farm SCADA system to contain a large amount of power-limited operating data. These power-limited operating data are usually regarded as abnormal data, and a large number of them are eliminated; at the same time, they are superimposed with the effect of other sparse abnormal data after elimination, forming a large number of discontinuous data segments and a large number of missing data segments. This large amount...

Embodiment 2

[0103]On the basis of the foregoing embodiment, an embodiment of the present invention also provides a missing data filling device, such asFigure 5 Shown is a schematic structural diagram of a missing data filling device, which includes:

[0104]The obtaining module 50 is used to obtain the wind farm operation data to be filled, where the wind farm operation data includes wind power data after cleaning;

[0105]The extraction module 52 is used to extract the sampling time in the wind farm operation data and establish a time series of the wind farm operation data to be filled;

[0106]The dividing module 54 is used to divide the wind farm operation data to be filled into multiple discrete states based on the time series;

[0107]The judging module 56 is used to judge whether the time interval between any two adjacent discretized states is greater than a preset interval threshold;

[0108]The filling module 58 is used to calculate the filling value in the time interval according to the pre-establish...

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Abstract

The invention provides a method and device for filling missing data, and relates to the technical field of data processing, and the method comprises the steps: obtaining to-be-filled wind field operation data; Extracting sampling time in the wind field operation data, and establishing a time sequence of the wind field operation data to be filled; Dividing the wind field operation data to be filledinto a plurality of discretized states based on the time sequence; Judging whether the time interval between any two adjacent discretization states is greater than a preset interval threshold value or not; And if yes, calculating a filling value in the time interval according to a pre-established interpolation model so as to fill the missing data of the wind field operation data to be filled. According to the missing data filling method and device provided by the invention, the missing data of the wind field operation data to be filled can be filled, so that the missing problem of the wind field operation data is relieved, and meanwhile, the data volume of available effective data is effectively increased.

Description

Technical field[0001]The invention relates to the technical field of data processing, in particular to a method and device for filling missing data.Background technique[0002]Modern large-scale wind farms are a wide-area geographically distributed system. A large number of wind turbines are exposed to harsh natural environments and are directly affected by random factors such as gusts, strong turbulence, extreme weather, etc., which can be regarded as wind power data collection and monitoring systems, namely SCADA (Supervisory Control And Data Acquisition, data acquisition and monitoring control system) An uncontrollable external interference source of system data may induce and generate abnormal data.[0003]In addition, a large number of wind turbines use long-distance optical fibers, dedicated wireless networks, etc. to communicate with wind farms or cluster-level centralized control rooms; at the same time, modern wind turbines and wind farms have several information collection sys...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/20G06F113/06
Inventor 褚景春袁凌于天笑胡阳奚芸华丁亮
Owner GUODIAN UNITED POWER TECH
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