Method and system for quickly positioning bus active imbalance based on multi-source data

A positioning method and multi-source data technology, applied in the direction of multi-phase network asymmetry reduction, multi-phase network elimination/reduction of asymmetry, etc., can solve the problem that the bus cannot meet the bus positioning and processing, and affect the safety, high-quality and economical operation of the power grid and other issues to achieve the effect of high effectiveness and accuracy

Active Publication Date: 2019-09-27
STATE GRID HENAN ELECTRIC POWER ELECTRIC POWER SCI RES INST +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The technical problem to be solved by the present invention is: in order to solve the problem that the existing busbar power unbalance control method cannot meet the rapid defect location and treatment

Method used

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  • Method and system for quickly positioning bus active imbalance based on multi-source data
  • Method and system for quickly positioning bus active imbalance based on multi-source data
  • Method and system for quickly positioning bus active imbalance based on multi-source data

Examples

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Example Embodiment

[0050] Example 1

[0051] In this embodiment, the method of the present invention is described in detail by taking the high-voltage side busbar (500kV) of a 500kV substation in Henan as an example:

[0052] (1) Real-time data analysis

[0053] There are 5 branches (branch 1-branch 5) and 3 main transformers (main transformer 1-main transformer 3) connected to the bus. First, compare the real-time SCADA and WAMS data of the 8 branches, and find that the main transformers are at the same time. 3 The measured value of the SCADA active power on the high-voltage side is always less than the measured value of the WAMS by about 10MW. Therefore, the line where the main transformer 3 is located is located as the problem line, and the comparison between the two at three times is shown in Table 1. Other lines occasionally have the problem of slow refresh of SCADA data, which needs to be further analyzed in combination with historical data.

[0054] Table 1

[0055]

[0056]

[0...

Example Embodiment

[0062] Example 2

[0063] This embodiment takes the medium-voltage side busbar (220kV) of a 500kV substation in Henan as an example, and the method of the present invention is described in detail as follows:

[0064] (1) Real-time data analysis: There are 8 branches (branch 1-branch 8) and 2 main transformers (main transformer 1-main transformer 2) connected to the bus. By comparing the SCADA measured data of each branch at the same time , state estimation data and peer line data, it is found that the SCADA measurement value of branch 4 is lower than other data by more than 20MW, so branch 4 is positioned as a defective line, and the related data of branch 4 at 3 times is listed for comparison, see Table 2. During the observation, it was found that the active power refresh of the SCADA measurement of some lines was slow, more than 10 seconds. The on-site need to further check the clock device and the change of the measurement and control device and send the parameter settings...

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Abstract

The invention relates to a method and system for quickly positioning bus active imbalance based on multi-source data. The method comprises the following steps: (1) if the unbalanced bus has a voltage grade of 500 kV, the SCADA real-time active data of each branch connected by the bus are compared with the real-time active data of WAMS, if the error between the two kinds of data is larger than 5 MW, the line is determined to be a defective line, and the line is subjected to defect elimination processing; and (2) if the unbalanced bus has a voltage grade of 220 kV, SCADA measurement of each branch connected by the bus is compared with state estimation and the real-time active data of an opposite line, if the error between the two kinds of data is larger than 3 MW, the line is determined to be a defective line, and the line is subjected to defect elimination processing. The problems that the existing bus power imbalance processing method can not meet quick defect positioning and processing for bus active imbalance, and the safety, quality and economic operation of the power grid is influenced can be solved.

Description

technical field [0001] The application belongs to the technical field of power grid safe operation, and in particular relates to a method and system for quickly locating busbar active power imbalance based on multi-source data. Background technique [0002] With the continuous development of the power industry, the role of the power grid dispatching automation system becomes more important. Whether the bus power is balanced is an important indicator for the assessment of power quality, which directly reflects the operating status of the power grid. If there is a power unbalanced fault on the bus, the cause of the fault must be analyzed in a timely manner, and the cause must be effectively treated to ensure the normal and safe operation of the power grid. [0003] At present, some literatures have analyzed the unbalanced busbar power: Literature [1] (Analysis and Treatment of Causes of Busbar Active Power Unbalanced [J]. Jiangxi Electric Power, 2010, 34(4): 27-29) analyzed th...

Claims

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Application Information

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IPC IPC(8): H02J3/26
CPCH02J3/26Y02E40/50
Inventor 任鹏凌张江南贺勇吴坡
Owner STATE GRID HENAN ELECTRIC POWER ELECTRIC POWER SCI RES INST
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