Method for aligning section raw data on basis of double time scale delay evaluation

A technology of time scale and delay estimation, applied in the direction of electrical components, circuit devices, etc., can solve the problems of not performing quantitative estimation and correcting delay errors

Active Publication Date: 2012-02-22
NORTHEAST CHINA GRID +1
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Problems solved by technology

[0007] In view of the fact that there are different degrees of delay in the multi-source real-time data of the dispatching center, but there is no quantitative estimation and correction of the delay error

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  • Method for aligning section raw data on basis of double time scale delay evaluation
  • Method for aligning section raw data on basis of double time scale delay evaluation
  • Method for aligning section raw data on basis of double time scale delay evaluation

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[0017] The technical solution of the present invention will be described in further detail below in conjunction with the accompanying drawings.

[0018] The present invention proposes a cross-section alignment method based on real-time data quantitative delay estimation and prediction correction based on dual time scales. This method can quantitatively estimate the data sent by different RTUs and other scheduling centers according to the real-time sequence with GPS synchronous time scale collected by the PMU. EMS transmits the delay of data, and corrects the error caused by the delay through prediction, so that the transmission data from various sources can be integrated into a section that is closer to the current actual operating conditions, and the mismatch of data in the entire network is greatly reduced. The steps are as follows ( figure 1 Be the principle flowchart of the inventive method):

[0019] (1) Perform dual-time-scale sampling on the real-time data sent by the ...

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Abstract

The invention relates to a method for aligning section raw data on the basis of double time scale quantitative evaluation measurement point delay and performing prediction and modification. By the method, multi-source section raw data with different delay can be aligned. According to data delay differences among different regions, different stations and different transmission types, the method comprises the following steps of: quantitatively evaluating delay time of each measurement point by using sampling sequences with two time scales; predicting and modifying the current numerical value through an autoregression-sliding average model; evaluating the precision grade of the numerical value and a delay distribution interval; and providing for a state estimator. By the method, the data delay of different measurement points can be quantified accurately; the current section numerical value of the measurement point can be predicted and modified according to the delay; and precision weightis endowed, so that the aligned multi-source real-time data is integrated into a section closer to the operation condition of the current power grid.

Description

technical field [0001] The invention belongs to the technical field of power system automation, and more specifically relates to a method for online alignment of multi-source data in a dispatch center of a power system. Background technique [0002] The interconnection of the power grid realizes the optimal allocation of resources in a wider range, thereby generating huge economic benefits, but it also brings many problems to the operation, analysis and coordination control of the power grid. Since the failure of the adjacent grid will directly affect the safety of the internal grid, the model and real-time section data of the adjacent grid are needed in the analysis of the security and stability of the grid. [0003] A section refers to a collection of analog quantities such as active power, reactive power, voltage, and current that reflect the operating conditions of a power system at a certain moment, and switching data such as switch and knife status. In the dispatching...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J13/00
Inventor 徐兴伟齐文斌侯凯元盛浩邵广惠肖晓春陶家琪李志学王钢娄志辉岳涵王华夏德明王肇光杨宁郭艳娇张晓华李满坡孟令愚马新刘家庆李泽宇贾伟高德宾
Owner NORTHEAST CHINA GRID
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