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Method for verifying power distribution network topology structure by utilizing measurement data

A technology of distribution network topology and measurement data, applied in electrical components, circuit devices, AC network circuits, etc., can solve the problems of poor operability, insufficient accuracy, high material and labor costs, and achieve high accuracy, material And the effect of low labor cost and good operability

Inactive Publication Date: 2014-12-17
STATE GRID CORP OF CHINA +3
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  • Abstract
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  • Claims
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Problems solved by technology

[0012] Aiming at the deficiencies of the prior art, the present invention provides a method for verifying the topological structure of the distribution network using measurement data to solve the problems of high material and labor costs, insufficient accuracy, and poor operability of the existing verification method

Method used

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  • Method for verifying power distribution network topology structure by utilizing measurement data
  • Method for verifying power distribution network topology structure by utilizing measurement data
  • Method for verifying power distribution network topology structure by utilizing measurement data

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Embodiment

[0053] According to the data of the GIS system, the substation 1 under the feeder 1 belongs to the C phase, and a total of 13 smart meters of power users are connected under the substation. Use the one-week time-sharing voltage distribution sequence of all smart meters under this station to calculate, as shown in image 3 As shown, the correlation coefficient matrix between the time-sharing voltages of all the ammeters can be obtained. It can be seen that, except for meter 11 and meter 13, the correlation coefficients between the time-sharing voltages of all other smart meters connected to the substation are greater than 0.97. Such a high correlation can indicate that these meters are indeed connected to substation 1. of. However, the correlation coefficients between meters 11 and 13 and other meters are in the relatively low range of 0.67 to 0.78, in image 3 shown in slanted hatching. This indicates that the two meters may be connected to other transformers in the actual ...

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Abstract

The invention relates to a method for verifying a power distribution network topology structure by utilizing measurement data. The method comprises the steps of: (1) calculating time-sharing voltage sequences and time-sharing voltage distribution curves of smart meters; (2) analyzing relevant coefficients of each voltage sequence; (3) estimating a relative electric distance between each pair of the smart meters; (4) judging relative upstream and downstream positions of a group of the smart meters on the same feed line through comparing voltage values of the voltage sequences, and verifying correctness of data and topology structure in a GIS (Geographic Information System). Through calculation of the relative coefficients and relative voltage size between the time sequence voltages, and contrastive analysis with data in same type obtained under other transformers in the same region, the correctness of the data and the topology structure in the GIS can be verified efficiently, existing errors and faults can be verified and corrected. The verifying method needs low material source and manpower cost, and is high in accuracy and good in operability.

Description

technical field [0001] The invention relates to a method for checking the topological structure of a distribution network, in particular to a method for checking the topological structure of a distribution network by using measurement data. Background technique [0002] The topology of the distribution network describes the physical connection relationship between the power user load and the distribution network transformer and transformer feeder. The typical topology of distribution network system is radial type. Due to the uncertainty brought by the change of load, the voltage distribution of the distribution network has the following characteristics: [0003] (1) Because the distribution of loads connected to different feeders is different, the voltage distribution on different feeders is different; [0004] (2) For the same feeder, there is usually a certain degree of three-phase unbalance in its voltage phase; [0005] (3) The magnitude and level of the voltage value...

Claims

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Application Information

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IPC IPC(8): H02J3/00
Inventor 栾文鹏雷鸣周逢权徐大青
Owner STATE GRID CORP OF CHINA
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