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Relay protection judgment method based on dynamic tendency analysis

A relay protection and dynamic technology, applied in the field of relay protection criteria based on dynamic trend analysis, can solve the problems of potential information and state ignorance and insufficiency

Active Publication Date: 2015-09-16
BEIJING JIAOTONG UNIV
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Problems solved by technology

[0003] Traditional relay protection principles often judge the occurrence of faults based on instantaneous power frequency electrical quantities, while potential information and status during operation are often ignored; in addition, traditional protection based on instantaneous power frequency changes is limited by the extraction of power frequency quantities method, there are still deficiencies in response to failure speed and tolerance

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  • Relay protection judgment method based on dynamic tendency analysis
  • Relay protection judgment method based on dynamic tendency analysis
  • Relay protection judgment method based on dynamic tendency analysis

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Embodiment 2

[0103] The application of the relay protection criterion method based on the composite iterative dynamic trend degree analysis shown in the above-mentioned embodiment 1 is applied to figure 2 The network topology of a simplified power system is shown, illustrating the application of this method to single-ended current protection.

[0104] exist figure 2 In the network topology of the simplified power system shown, the total length of the transmission line is 2km, the fault is set at 0.2km of the transmission line, the fault start time is 0.2s, the fault duration is 0.1s, and two polarities are set at 0.16s and 0.18s respectively The opposite single bad value (BD); take the protection at M1 as an example to illustrate the application process of the relay protection criterion based on the composite iterative dynamic trend degree analysis. The protection sampling rate is 32 points per cycle, and the sampling analysis starts from 0.1s. The specific steps are as follows :

[01...

Embodiment 3

[0124] This embodiment provides a relay protection criterion device based on dynamic trend degree analysis, the specific structure of the device is as follows Figure 4 As shown, the following modules are included:

[0125] The initial analysis module 41 is used to analyze the data segment in the power frequency dynamic data stream sampled in the power system, and form an initial data sequence matrix and time variable matrix from the starting point of the data segment;

[0126] The dynamic trend degree value calculation module 42 of the newly added data point is used to use the time interval between the new data point and the starting point after receiving the newly added data point in the dynamic data stream. The initial data sequence matrix and time variable matrix calculate the dynamic trend value corresponding to the newly added data point through iterative operation;

[0127] Data segmentation point judging module 43, for calculating RSS and TSS by iterative calculation,...

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Abstract

An embodiment of the invention provides a relay protection judgment method based on dynamic tendency analysis. The method mainly comprises the following steps: carrying out analysis on data segment in power frequency dynamic data flow sampled in an electric system and forming an initial data sequence matrix and a time variable matrix from the starting point of the data segment; calculating dynamic tendency values corresponding to newly-increased data points according to the time intervals of new data points and the starting point, by utilizing the initial data sequence matrix and the time variable matrix and through iterative operation; and comparing the dynamic tendency values corresponding to the newly-increased data points with preset dynamic tendency value judgment threshold, and judging whether to carry out relay protection processing on the electric system according to the comparison result and breakpoint information jointly. The method adopts the composite iteration regression mode to accurately fit the sample data tendency, realizes effective judgment of faults in the electric system based on the dynamic tendency values and breakpoint position, and meanwhile, has sampling bad value immunization and alarming functions.

Description

technical field [0001] The invention relates to the field of electric power system relay protection and the technical field of data mining, in particular to a method of relay protection criterion based on dynamic trend degree analysis. Background technique [0002] Data mining (Data Mining), also known as data mining and data mining, is an important step in database knowledge discovery, and its meaning refers to searching for hidden information from a large amount of data through certain methods. Among them, "trend data", as an important characteristic quantity reflecting data changes, can indirectly reflect the system's operating status and trend, and provide effective information support for control and forecasting. It has been widely used in business management, production control, market analysis, engineering design, etc. field. [0003] Traditional relay protection principles often judge the occurrence of faults based on instantaneous power frequency electrical quantit...

Claims

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Application Information

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IPC IPC(8): G06Q10/06G06Q50/06
Inventor 和敬涵刘琳李严凝叶豪东
Owner BEIJING JIAOTONG UNIV
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