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Power distribution network mutual inductor metering performance calibration system and laboratory calibration device

A technology for measuring performance and calibrating systems, which is applied to measuring devices, measuring electrical variables, instruments, etc., can solve the problems of multiple times of testing, large detection errors, and large floor space, so as to reduce manual participation, improve safety, Effects of Improving Calibration Efficiency and Accuracy

Pending Publication Date: 2021-12-21
国网四川省电力公司营销服务中心
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is that the existing distribution network transformer measurement performance detection technology is not only inefficient, but also has wiring errors caused by switching wiring, large detection errors introduced by manual detection, multiple times of testing, and heavy workload. Large, time-consuming; large space occupation and cumbersome wiring, the purpose of the present invention is to provide a distribution network transformer measurement performance calibration system and a laboratory calibration device to solve the above technical problems

Method used

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  • Power distribution network mutual inductor metering performance calibration system and laboratory calibration device
  • Power distribution network mutual inductor metering performance calibration system and laboratory calibration device

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Effect test

Embodiment 1

[0032] This embodiment provides a measurement performance calibration system for a distribution network transformer, including: an automatic switching device, a standard voltage transformer, a standard current transformer, a high-power low-voltage program-controlled power supply, a program-controlled voltage regulating device, and a control center;

[0033] The high-power low-voltage program-controlled source provides a three-phase power supply. After the three-phase power supply is boosted, it is connected to the standard voltage transformer and the transformer of the distribution network under test; after the three-phase power supply is boosted, it is connected to the standard current transformer and the tested transformer. distribution network transformer;

[0034] The output signals of the standard voltage transformer, standard current transformer and tested distribution network transformer are connected to the transformer calibrator for calibration;

[0035] The control c...

Embodiment 2

[0045] The process of calibrating the metering performance of the distribution network transformer under test with the intelligent calibration device for the metering performance of the distribution network transformer is as follows: figure 2 shown. At the beginning of the whole calibration test, the wiring shall be carried out according to the calibration method of the regulations. Since the wiring of the standard current transformer and standard voltage transformer has been connected, it is only necessary to connect the primary and secondary wiring of the tested distribution network transformer. ; Then turn on the high-power low-voltage program-controlled power supply, and set the rated primary current, rated voltage, transformation ratio, rated load, wiring mode and other information of the tested distribution network transformer in the software control and operating system, and send it to the automatic switching Devices, current load boxes, voltage load boxes and other eq...

Embodiment 3

[0047] This embodiment provides a laboratory calibration device for the metering performance of distribution network transformers, which is based on the metering performance calibration system for distribution network transformers in Embodiment 1, including the high-voltage area, low-voltage area, high-voltage current and voltage placed in the same room Circuit; the high-voltage area and the low-voltage area are separated by a glass curtain wall, and the high-voltage current and voltage circuit copper bars are fixed to the ceiling by insulator hoisting;

[0048] The high-voltage area is a complete set of high-voltage cabinets, and the high-voltage cabinet is built with: current booster, booster, multi-ratio standard current transformer, multi-ratio standard voltage transformer and automatic switching device; the low-voltage area includes: secondary control Equipment, a three-phase program-controlled power supply, a transformer calibrator, a load box and a controller; the contro...

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Abstract

The invention discloses a power distribution network mutual inductor metering performance calibration system and a laboratory calibration device. A high-power low-voltage program control source provides a three-phase power supply for boosting and then is connected to a standard voltage mutual inductor and a tested power distribution network mutual inductor at the same time; the three-phase power supply is connected to the standard current transformer and the tested power distribution network transformer at the same time after current rising; output signals of the standard voltage transformer, the standard current transformer and the tested power distribution network transformer are accessed to the transformer calibrator for calibration; the control center designs a calibration scheme and process according to the tested power distribution network mutual inductor, generates a task list, sends the task list to the program control voltage regulation device and the automatic switching device, and regulates and controls the output of the high-power low-voltage program control power supply according to the corresponding information of the task list, switches the wiring states of the two sides of the standard voltage transformer, the standard current transformer and the tested power distribution network transformer according to the corresponding information of the task list; the calibration efficiency and accuracy are greatly improved, manual participation in the calibration process is reduced, and the safety is improved.

Description

technical field [0001] The invention relates to the technical field of measurement performance calibration, in particular to a distribution network transformer measurement performance calibration system and a laboratory calibration device. Background technique [0002] As the number of distribution network transformers is increasing year by year, the measurement performance calibration of distribution network transformers can only be carried out by manual wiring and testing. Not only is the detection efficiency low, but there are wiring errors caused by switching wiring and the introduction of manual testing The detection error is large. [0003] Since distribution network transformers have the characteristics of many types and different wiring methods, including combined distribution network transformers, which are composed of three-phase or two-phase voltage transformers (TV) and three-phase or two-phase current transformers (TA) A combination or a combination of a single...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R35/02
CPCG01R35/02
Inventor 覃剑刘鹍黄嘉鹏刘刚罗睿希张鹏张杰夫史强曾兰李琪林
Owner 国网四川省电力公司营销服务中心
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