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A method for on-site testing of power transformer intelligent components

A technology for power transformers and field testing, applied in the measurement of electrical variables, instruments, and electrical measurement, can solve problems such as incompleteness and insufficient primary equipment maintenance, and achieve the effect of improving work effects, sufficient maintenance, and improving processes.

Active Publication Date: 2017-03-29
STATE GRID CORP OF CHINA +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Nowadays, in the smart substation, the analog circuit is canceled for the secondary equipment, the AC sampling and input and output are completely digital, which puts forward higher requirements for the operation and maintenance work. At the same time, the intelligent components in the transformer are in the form of It conforms to the secondary equipment, but it is closely related to the primary body, which is a new thing. The transport personnel cannot simply adopt the experience and methods of testing the digital secondary equipment, which may easily lead to insufficient and incomplete maintenance of the primary equipment.

Method used

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  • A method for on-site testing of power transformer intelligent components
  • A method for on-site testing of power transformer intelligent components
  • A method for on-site testing of power transformer intelligent components

Examples

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Embodiment 1

[0057] Such as figure 1 As shown, an on-site testing method for intelligent components of a power transformer is a single unit, that is, without monitoring the main IED. On-site testing equipment includes: a relay protection tester, a variable resistor, an on-site testing platform for an intelligent transformer, and an IED under test. The relay protection tester and the variable resistor are respectively connected to the tested IED with cables; the intelligent transformer field test platform and the tested IED are connected with optical fibers. Taking the measured IED as an example, the test steps are:

[0058] 1) The tester selects all the functions of the transformer measurement IED on the intelligent transformer field test platform, reads the relevant configuration files, and generates the test plan.

[0059] 2) Use the relay protection tester as the current signal standard source to generate 4-20mA DC current signal to simulate the main fuel tank oil level and oil pressure info...

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Abstract

The invention belongs to the technical field of intelligent high-voltage device test, and particularly relates to a method for testing intelligent components of a power transformer on site. The intelligent elements include a measuring IED, an on-load tap switch control IED, a cooling device control IED, a dissolved-in-oil gas monitoring IED, an iron core grounding current monitoring IED, a main monitoring IED and a combining unit. The method includes the steps of the monomer site test without the main monitoring IED, the site test with the main monitoring IED and the integrated site test. By means of the method, the process of testing the intelligent transformer on site can be effectively improved, and the obvious effect of overhauling the device at a time is completely and thoroughly achieved. The blank in the field of the site test of the intelligent components of the transformer is filled, efficiency and quality of the site test of the intelligent components of the transformer are greatly improved, and the working effect is obviously improved.

Description

Technical field [0001] The invention belongs to the technical field of intelligent high-voltage equipment testing, and in particular relates to an on-site testing method for power transformer intelligent components. Background technique [0002] As the construction of smart substations continues to deepen, a large number of smart transformers have been put into operation on site. The smart transformer is composed of a transformer body, a sensor, and smart components, and the sensor and the body are integrated. The intelligent component realizes the functions of measuring, monitoring, and controlling the main body. It is connected to the sensors and actuators in the transformer through cables or optical fibers. The connection can be an analog signal or a digital signal. [0003] Nowadays, in the smart substation, the secondary equipment cancels the analog loop, AC sampling and binary input and output, and completely adopts digital quantities, which puts forward higher requirements ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/00
Inventor 高强张光明耿宝宏韩月刘齐原峰程大伟王茂军钟丹田李艳丹李平
Owner STATE GRID CORP OF CHINA
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