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Power distribution network current transformer transformation ratio checking method and device, equipment and medium

A technology for current transformers and distribution networks, applied in measuring devices, measuring electrical variables, instruments, etc., can solve problems such as low efficiency, high cost, and poor reliability, and achieve high efficiency, low cost, and high reliability

Pending Publication Date: 2022-02-18
国网四川省电力公司营销服务中心 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In order to solve the problems of low efficiency, high cost and poor reliability of traditional transformation ratio verification methods, the present invention provides a transformation ratio verification method for current transformers in distribution networks

Method used

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  • Power distribution network current transformer transformation ratio checking method and device, equipment and medium
  • Power distribution network current transformer transformation ratio checking method and device, equipment and medium
  • Power distribution network current transformer transformation ratio checking method and device, equipment and medium

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Embodiment 1

[0045] Aiming at the problems of low efficiency, high cost, and poor reliability in the traditional transformation ratio verification method, this embodiment proposes a transformation ratio verification method of a current transformer in a distribution network.

[0046] Such as figure 1 As shown, the method of the present embodiment includes:

[0047] Step 101, acquiring the electric energy of each power supply transformer at the power supply end and the electric energy of each power consumption transformer at the power consumption end in the same time period.

[0048] In this embodiment, each power supply transformer at the power supply end in the power supply line is connected to an electric energy meter through a transformer, and the electric energy meter monitors the electric energy of its corresponding power supply transformer in real time and uploads the monitoring data to the power consumption information collection system; similarly, In the power supply line, each pow...

Embodiment 2

[0078] This embodiment proposes a device for checking the transformation ratio of a distribution network current transformer, such as image 3 As shown, the device of this embodiment includes a data acquisition unit, a data processing unit, a calculation unit and a verification unit.

[0079] Wherein, the data acquisition unit is used to obtain the electric energy of each power supply transformer at the power supply end and the electric energy of each power consumption transformer at the power consumption end in the same time period.

[0080] The data processing unit calculates the total input electric energy and the total consumed electric energy except the power transformer to be checked according to the electric energy of each power supply transformer and the electric energy of each power transformer.

[0081] The calculation unit calculates the calculated transformation ratio of the corresponding current transformer of the power transformer to be checked according to the c...

Embodiment 3

[0084] In this embodiment, the method proposed in the above-mentioned embodiment 1 is applied to a specific power supply circuit, and the schematic diagram of the specific power supply circuit is as follows Figure 4 As shown, the parameters in the figure are expressed as follows:

[0085] A1——1# power supply transformer, used to provide electric energy, and the electric energy provided (primary side) is represented by A1

[0086] A2——2# power supply transformer, used to provide electric energy, and the electric energy provided (primary side) is represented by A2

[0087] An——n# power supply transformer, used to provide electric energy, and the electric energy provided (primary side) is represented by An

[0088] B1——The electric energy meter connected to the 1# power supply transformer through the transformer (the transformation ratio of the corresponding current transformer is Q1, and the transformation ratio of the voltage transformer is S1), which is used to measure the e...

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Abstract

The invention discloses a power distribution network current transformer transformation ratio checking method and device, equipment and a medium. The method comprises the following steps of: acquiring electric energy of each power supply transformer at a power supply end and electric energy of each power utilization transformer at a power utilization end in the same time period; according to the electric energy of each power supply transformer and the electric energy of each power utilization transformer, calculating to obtain total input electric energy and total consumed electric energy except a to-be-checked power utilization transformer; according to the calculated total input electric energy and total consumed electric energy and the consumed electric energy of the to-be-checked power utilization transformer, calculating a transformation ratio of a current transformer corresponding to the to-be-checked power utilization transformer; and checking the calculated transformation ratio of the current transformer corresponding to the to-be-checked power utilization transformer and a corresponding archive transformation ratio. According to the invention, the online checking of the transformation ratio of a power distribution network current transformer is realized by using the electric energy data, and the efficiency and reliability of the transformation ratio checking of the power distribution network current transformer are improved.

Description

technical field [0001] The invention belongs to the technical field of distribution network transformers, and in particular relates to a method, device, equipment and medium for checking the transformation ratio of a distribution network current transformer. Background technique [0002] Distribution network transformer is one of the key equipment of distribution network. With the deepening of electric power reform, its good operation quality has received more and more attention. Distribution network transformers mainly have the following characteristics. 1. As a trade settlement device, it is a compulsory verification equipment. According to the provisions of the measurement law, qualified distribution network transformers can be used for electric energy measurement; 2. There are many. According to statistics, there are more than 4.5 million sets of 6-35kV distribution network transformers in my country, and there are various wiring methods; 3. The operating environment is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R35/02G01R29/20
CPCG01R35/02G01R29/20
Inventor 刘刚严平李琪林汪佳高俊李金嵩易黎张杰夫薛莉思叶子阳刘晨黄嘉鹏丁熠辉周莹
Owner 国网四川省电力公司营销服务中心
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