AMI-based intelligent electric meter phase recognition, topological identification and impedance estimation method
A smart meter and impedance estimation technology, applied in the measurement of electrical variables, measuring devices, instruments, etc., can solve problems such as phase error, and achieve the effect of high accuracy and simple method
Active Publication Date: 2020-03-06
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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Problems solved by technology
Problems such as phase errors are easy to appear in GIS data, and the accuracy of the data is related to the accurate application of the power system distribution model
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[0043] like figure 1 As shown, an AMI-based smart meter phase identification, topology identification and impedance estimation method, the method includes the following steps:
[0044] S1: Obtain the historical data of the transformer and all smart meters, including voltage and power. The smart meter in this embodiment collects a point every 15 minutes, and collects 96 points a day. Correspondingly, the transformer also samples at the corresponding time;
[0045] S2: Based on historical data, use the voltage correlation principle and regression model to judge the matching relationship between the smart meter and the single-phase tap of the transformer, and determine the phase of the smart meter;
[0046] S3: The smart meters connected to the same single-phase tap of the transformer form a set A;
[0047]S4: Based on the historical data, use the voltage correlation principle and the regression model to pair the smart meters in the set A to solve the problem, and determine the ...
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The invention relates to an AMI-based intelligent electric meter phase recognition, topological identification and impedance estimation method. The method comprises the steps that (1) historical dataof a transformer and intelligent electric meters is acquired; (2) a voltage correlation principle and a regression model are utilized to discriminate a matching relation between the intelligent electric meters and single-phase taps of the transformer, and the phases of the intelligent electric meters are determined; (3) the intelligent electric meters connected to the same single-phase tap of thetransformer form a set A; (4) the voltage correlation principle and the regression model are utilized to perform pairing solving on every two intelligent electric meters in the set A, and a closely-coupled intelligent electric meter pair sharing one common point is determined; (5) the closely-coupled intelligent electric meter pair is replaced with a new intelligent electric meter, the set A is updated, the step (4) is repeated to complete pairing of all the intelligent electric meters in the set A, and topological connection of the intelligent electric meters located under the same single-phase tap is determined; and (6) a power distribution system impedance model is generated. Compared with the prior art, the method is easy and convenient to use and high in accuracy.
Description
technical field [0001] The invention relates to the technical field of power system power distribution, in particular to an AMI-based smart meter phase identification, topology identification and impedance estimation method. Background technique [0002] With the wide application of geographic information system (GIS), practical models of distribution lines become more and more complex. Problems such as phase errors are easy to appear in GIS data, and the accuracy of the data is related to the accurate application of the power system distribution model. [0003] Thanks to the rapid development of communication technology and information technology, advanced measurement system (AMI) provides a new method for distribution line modeling and analysis, and has been widely promoted and used. AMI uses the two-way communication system and the smart meter that records the detailed load information of the user to regularly or instantly obtain the user's time-scaled or real-time vario...
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IPC IPC(8): G01R35/04
CPCG01R35/04
Inventor 赵健王小宇李梁
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER