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Low-voltage transformer area electric energy meter operation error calculation method and system

A low-voltage station area and error calculation technology, applied in the direction of measuring electrical variables, measuring devices, instruments, etc., can solve the problems of large manpower and material resources, and achieve the effects of simple implementation, improved accuracy, and high reliability

Active Publication Date: 2021-11-09
STATE GRID ZHEJIANG ELECTRIC POWER CO MARKETING SERVICE CENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The collection of this information requires relatively large manpower and material resources, because this information is not readily available and needs to be obtained again

Method used

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  • Low-voltage transformer area electric energy meter operation error calculation method and system
  • Low-voltage transformer area electric energy meter operation error calculation method and system
  • Low-voltage transformer area electric energy meter operation error calculation method and system

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0055] This embodiment is a low-pressure meter run error calculation stage area, such as figure 1 Shown, which reads as follows:

[0056] By Chinese Patent Application No. 202010686416.9 "based electricity collecting data determination method and system losses in low voltage distribution" method provided by high-frequency power collection point 96, voltage and power factor to establish the overall profile of the stage area sub-table and the table satisfy the following equation:

[0057]

[0058] Wherein, y (i) is the i-th list area always day power supply, φ j (I) is the j-th user in the i-day consumption, φ j (i m ), U j (i m ), Denote the j-th user in the i m-th day within 15 minutes of the measurement values ​​of power consumption, voltage and power factor, [alpha] jk It represents the j-th stage area and the k-th user common branch of the equivalent resistance, a constant to be determined; [epsilon] 0 Represents the stage area fixed loss, constant to be determined; [epsilon...

Embodiment 2

[0090] This embodiment is a low voltage distribution error calculating energy meter system operation, such as image 3 Shown, which includes a data acquisition and preprocessing module, building blocks equations, Equations module, the power topology inference module and recalculate the module operation error.

[0091]The data acquisition and pre-processing module: acquiring file information of the main table of the territorial table and the user-sized, by obtaining high-frequency acquisition of high-frequency acquisition high-precision grades with the electricity information collection system and the high-frequency acquisition of the user-sized high-frequency , Voltage data, power factor data (high frequency acquisition refers to each 15 minutes, 96 data a day; high-precision rating means that at least 4 valid numbers after the number of decimal points); the data format and complete data format for the acquired data Sexual inspection, data cleaning for exception data, and finally c...

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Abstract

The invention discloses a low-voltage transformer area electric energy meter operation error calculation method and system. According to the technical scheme, the method comprises the steps of data obtaining and preprocessing, wherein data format and integrity checking is conducted on obtained data, data cleaning is conducted on abnormal data, and finally cleaned high-quality data is obtained; constructing an equation set; solving the equation set, and obtaining the equivalent resistance [alpha]jk from the transformer area general meter to the line common part of the metering point j and the metering point k; drawing an electric power topological graph of the transformer area according to the equivalent resistance [alpha]jk, and deducing an electric power topology; and according to the deduced calculation results of the electric power topology and the equivalent resistance, inversely substituting back to the equation, and recalculating the operation error [epsilon]j of the electric energy meter. According to the method, the power topology of the transformer area can be speculated only by using high-resolution electric quantity, voltage, power factor and other data acquired at high frequency, and the reliability is high; and error analysis is carried out by using a topology identification result, so that the precision of an analysis result of the operation error of the electric energy meter can be further improved.

Description

Technical field [0001] The present invention relates to the field of power topology recognition in the low pressure station region, in particular to a method and system for operating error calculation based on high frequency high-precision data to perform error calculations. Background technique [0002] The power topology of the low pressing station is the accurate, real and intuitive reflection of the connection relationship between the various users and the power supply power supply in the low pressure station area. It is important for the estimation of the line loss of the field line loss. [0003] In the existing method, to obtain the power topology of the low presser station, the power system staff is required to measure the field test through the mobile device terminal measuring the topology relationship, and arrange a large number of manpower for on-site surveys, and people are judging the topology. This method is expensive, and the effect is poor. Therefore, how to intel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R35/04
CPCG01R35/04
Inventor 李熊袁健王佳颖胡瑛俊张宏达姚力
Owner STATE GRID ZHEJIANG ELECTRIC POWER CO MARKETING SERVICE CENT