CN202221469U - Control system for calibration console of gas relay - Google Patents
Control system for calibration console of gas relay Download PDFInfo
- Publication number
- CN202221469U CN202221469U CN2011203432140U CN201120343214U CN202221469U CN 202221469 U CN202221469 U CN 202221469U CN 2011203432140 U CN2011203432140 U CN 2011203432140U CN 201120343214 U CN201120343214 U CN 201120343214U CN 202221469 U CN202221469 U CN 202221469U
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Abstract
The utility model discloses a control system for a calibration console of a gas relay, which comprises a power source unit, a single-chip microcomputer, a control unit, a printing output unit, a pressure acquisition unit, a pressurizing unit, a contact signal read-in unit and an operating unit. The control unit and the printing output unit are connected with output interfaces of the single-chip microcomputer, and the pressure acquisition unit, the pressurizing unit and the contact signal read-in unit are connected with input interfaces of the single-chip microcomputer. A control output end of the control unit is connected with a control input end of an oil flow circulating unit. The control unit is a variable-frequency control unit, and a communication interface of the single-chip microcomputer is in communication connection with the operating unit through an industrial personal computer. A capacity calculation unit is connected to the other output interface of the single-chip microcomputer. The control system has the advantages that stability and reliability of the system in running are improved, accuracy, high precision and fine repeatability of gas test are realized, and quantitative testing of flow rate of different-caliber gas relays can be completed by testing pipelines of the same caliber.
Description
Technical field
The utility model relates to the Buchholz relay checking table, especially relates to Buchholz relay checking table control system.
Background technology
Buchholz relay is widely used in the large and medium-sized oil-immersed power transformer relay protection; When turn-to-turn short circuit appears in oil-filled transformer inside; During faults such as insulation damages, loose contact, multipoint earthing of iron core; Can in time send fault alarm and excise faulty equipment from electrical network rapidly, reduce the generation of electric power accident, improve the safe reliability of power equipment operation.The sensitivity of Buchholz relay protection is depended on the detection of heavy gas flow speed value and light methane gas volumetric values and is adjusted.For guaranteeing the safe operation of power transformer, how accurately to detect and adjustment gas relay flow speed value and gas volume value, this has become relevant personnel's extensive concern and questions of common interest such as Operation of Electric Systems, maintenance, test.At present, SCM Based Buchholz relay calibration equipment, complex operation, the interface is single; Data query and browse inconvenience, relay information in case be provided with finish, and can not revise, and data can not back up; In case storage chip damages, revise loss of data, must carry out verification again to calibration equipment; After the relay loss of data, cause the verification report not mend and beat simultaneously, need to have brought great inconvenience to the user again to the electrical equipment verification.
Summary of the invention
The utility model purpose is to provide the same bore test of a kind of usefulness pipeline to accomplish the Buchholz relay checking table control system of various different bore Buchholz relay flow speed value detection by quantitative.
For realizing above-mentioned purpose, the utility model can be taked following technical proposals:
The described Buchholz relay checking table of the utility model control system; It comprises power supply unit; Single-chip microcomputer; The pressure acquisition unit, presser unit, the contact point signal that are connected in control module, the print-out unit of said single-chip microcomputer output interface and are connected in its input interface read in the unit, and operating unit; The control output end of said control module is connected with oil stream cycling element control input end; Said control module is a frequency conversion control unit, and said single chip communication interface is communicated by letter with operating unit through industrial computer and is connected; Be connected with the volumetric metering unit at the single-chip microcomputer output interface.
The utility model advantage mainly be presented as following some:
1, described single-chip microcomputer only is responsible for command reception and execution, sends instruction through industrial computer, alleviates the single-chip microcomputer operating load greatly, has improved the stability and the reliability of system's operation;
2, adopt high precision volumetric metering unit; Automatically accomplish the measurement of light gas volume by industrial computer control; Thoroughly solved in the past by read Buchholz relay volume scale to be measured obtain light gas volumetric values because of artificial reading, scale is inaccurate or the low problem of the low measuring accuracy that brings of precision, have light gas test accurately, high, the good reproducibility of precision;
3, regulate the oil stream output of oil stream cycling element through frequency conversion control unit, the oil body flow velocity that flows through Buchholz relay to be verified is progressively changed, Buchholz relay action mechanism greatly improves the gas relay accuracy of detection during analogue transformer internal fault;
4, adopt the fluid-velocity survey method of demarcating; Overlap the perfect various model Buchholz relay fluid-velocity survey databases that are applicable to through setting up one; Reach the purpose of accomplishing various different bore gas relay flow speed value detection by quantitative with the test pipeline of same bore, can the various Buchholz relays of verification;
5, through the real-time control operation of industrial computer, the complete Chinese window type of host computer liquid crystal shows, system operation objective interface, succinct is simple to operate easy;
6, can pass through industrial computer self-defined report form, the non-verification property data message of form can be revised and can replenish after the first verification.
Description of drawings
Fig. 1 is the control system structural representation of the utility model.
Fig. 2 is the control system principle schematic of the utility model.
Embodiment
Shown in Fig. 1-2; The described Buchholz relay checking table of the utility model control system; It comprises power supply unit, and single-chip microcomputer is connected in control module, the print-out unit of said single-chip microcomputer output interface; Read in the unit with the pressure acquisition unit that is connected in its input interface, presser unit, contact point signal, and operating unit; The control output end of said control module is connected with oil stream cycling element control input end; Said control module is a frequency conversion control unit, and said single chip communication interface is communicated by letter with operating unit through industrial computer and is connected; Be connected with the volumetric metering unit at the single-chip microcomputer output interface.
The method of operating of the utility model is following:
When Buchholz relay is carried out verification and revises; Industrial computer software sends execution command and gives industrial computer; Industrial computer is through single-chip microcomputer output executing instruction operations topworks, and the information of returning execution gives industrial computer, and industrial computer software carries out sending of next bar instruction according to condition execution instruction.Circulation is carried out up to verification and is finished like this, after verification finishes the user according to circumstances printed report and preserve database or the non-check information of some Buchholz relays of amended record to database, in case check information verification completion can not be revised.
Claims (1)
1. Buchholz relay checking table control system; It comprises power supply unit, and single-chip microcomputer is connected in control module, the print-out unit of said single-chip microcomputer output interface; Read in the unit with the pressure acquisition unit that is connected in its input interface, presser unit, contact point signal, and operating unit; The control output end of said control module is connected with oil stream cycling element control input end; It is characterized in that: said control module is a frequency conversion control unit, and said single chip communication interface is communicated by letter with operating unit through industrial computer and is connected; Be connected with the volumetric metering unit at the single-chip microcomputer output interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203432140U CN202221469U (en) | 2011-09-14 | 2011-09-14 | Control system for calibration console of gas relay |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203432140U CN202221469U (en) | 2011-09-14 | 2011-09-14 | Control system for calibration console of gas relay |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202221469U true CN202221469U (en) | 2012-05-16 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203432140U Expired - Fee Related CN202221469U (en) | 2011-09-14 | 2011-09-14 | Control system for calibration console of gas relay |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202221469U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102879737A (en) * | 2012-10-23 | 2013-01-16 | 上海市电力公司 | Field calibration method for gas relay |
| CN107621295A (en) * | 2017-10-25 | 2018-01-23 | 云南电网有限责任公司电力科学研究院 | A kind of three pipeline gas relay test tables |
-
2011
- 2011-09-14 CN CN2011203432140U patent/CN202221469U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102879737A (en) * | 2012-10-23 | 2013-01-16 | 上海市电力公司 | Field calibration method for gas relay |
| CN102879737B (en) * | 2012-10-23 | 2015-11-18 | 上海市电力公司 | A kind of pressure transducer field calibration method of Buchholz relay |
| CN107621295A (en) * | 2017-10-25 | 2018-01-23 | 云南电网有限责任公司电力科学研究院 | A kind of three pipeline gas relay test tables |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120516 Termination date: 20170914 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |