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
CN102361353BActive Publication Date: 2013-09-25NORTHEAST CHINA GRID +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
NORTHEAST CHINA GRID
Publication Date
2013-09-25

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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 weight is 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.
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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...

Claims

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