CN102508153A - Main transformer protection tripping time limit check method - Google Patents

Main transformer protection tripping time limit check method Download PDF

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Publication number
CN102508153A
CN102508153A CN2011103236510A CN201110323651A CN102508153A CN 102508153 A CN102508153 A CN 102508153A CN 2011103236510 A CN2011103236510 A CN 2011103236510A CN 201110323651 A CN201110323651 A CN 201110323651A CN 102508153 A CN102508153 A CN 102508153A
Authority
CN
China
Prior art keywords
main transformer
time limit
oscillograph
trigger
coordinate unit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN2011103236510A
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Chinese (zh)
Inventor
赵冠楠
石鑫
孙金强
赵晓琦
张津伟
马鑫
王丹
张思皓
鲁璐
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ningdong Power Supply Bureau Ningxia Electric Power Co ltd
Original Assignee
Ningdong Power Supply Bureau Ningxia Electric Power Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ningdong Power Supply Bureau Ningxia Electric Power Co ltd filed Critical Ningdong Power Supply Bureau Ningxia Electric Power Co ltd
Priority to CN2011103236510A priority Critical patent/CN102508153A/en
Publication of CN102508153A publication Critical patent/CN102508153A/en
Pending legal-status Critical Current

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Abstract

The invention relates to a main transformer protection tripping time limit check method ,which comprises the following steps that: a triggering mode, a triggering condition and a coordinate unit of an oscillograph are set, and each cell of a transverse axis in the coordinate unit is a time value; a first passage and a second passage of the oscillograph are correspondently electrically connected with outlets to be detected of a circuit breaker; transmission test is performed; the waveform is analyzed according to the waveform produced by the oscillograph and the set coordinate unit, and a time difference between the outlets to be detected of the circuit breaker is calculated. Compared with a check method in the prior art, the main transformer protection tripping time limit check method is simple to operate.

Description

Main transformer protection tripping operation time limit method of calibration
Technical field:
The present invention relates to electrical network detection technique field, particularly a kind of main transformer protection tripping operation time limit method of calibration.
Background technology:
In the power supply technique field, in the main transformer to transformer station, the low back-up protection tripping operation time limit carries out verification, general in main transformer, low back-up protection is provided with two tripping operation outlet time limits, first time limit tripping bus connection switch, this side of second time limit tripping switch usually.Because twice trip time lacked (being generally 0.3S) at interval, traditional method of calibration can only use the microcomputer test instrument to measure, but complicated operation, and need tear the protective device control loop open, reduced reliability.
Summary of the invention:
In view of this, be necessary to provide a kind of main transformer protection simple to operate tripping operation time limit method of calibration.
A kind of main transformer protection tripping operation time limit method of calibration may further comprise the steps:
Oscillograph trigger mode, trigger condition and coordinate unit are set, and wherein the every lattice of the transverse axis in the coordinate unit are time value;
With oscillographic first passage, second channel corresponding with protective device in the outlet to be measured of isolating switch electrically connect;
Carry out transmission test;
The waveform that produces according to oscillograph and the coordinate unit analysis waveform of setting also calculate the mistiming between the outlet to be measured of isolating switch.
Main transformer protection tripping operation time limit method of calibration provided by the invention; Use oscillograph to be connected with the outlet to be measured of isolating switch in the protective device; Main transformer protection time limit of tripping is represented through oscillogram; So can accurately measure through the saltus step lattice number of measuring first passage, second channel waveform; Because main transformer protection tripping operation time limit method of calibration provided by the invention need not torn the loop open, only needs to calculate time value through the waveform that shows on the oscillograph and just can accomplish verification operation, the corresponding effect method of the prior art of main transformer protection tripping operation time limit method of calibration therefore provided by the invention is simple to operate.
Description of drawings:
Fig. 1 is the main transformer protection tripping operation time limit method of calibration of a preferred embodiments.
Fig. 2 is an oscillograph and the synoptic diagram that is connected of isolating switch.
Fig. 3 is the oscillogram of oscilloscope measurement.
Among the figure: oscillograph 10, isolating switch 20, main transformer protection tripping operation time limit method of calibration step S300~S303
Embodiment:
When junction closure was tripped in the protection of transformer station, terminal potential can sport+110V under the outlet pressing plate.So,, can confirm the protective device action of whether tripping as long as measure the current potential of outlet pressing plate lower end.Main transformer protection provided by the invention tripping operation time limit method of calibration is utilized the current potential of oscilloscope measurement outlet pressing plate lower end, and producing corresponding waveform, and the waveform that produces according to oscillograph calculates time value, thereby accomplishes main transformer protection tripping operation time limit verification.Please be simultaneously referring to Fig. 1, main transformer protection tripping operation time limit method of calibration provided by the invention may further comprise the steps:
Step S300 is provided with oscillograph trigger mode, trigger condition and coordinate unit, and wherein the every lattice of the transverse axis in the coordinate unit are time value.For example, be example with Agilent 54622A oscillograph, be provided with as follows: it is general mode (triggering when meeting trigger condition), DC voltage that trigger mode is set; Trigger condition is set: passage one triggers, trigger the upper edge, and the trigger slope level is set to 40-50V (signal voltage is 110V), is provided with to trigger the back record ripple time and be about 1s (the protection outlet mistiming is generally 0.3s); Coordinate unit is set: the every lattice of the longitudinal axis are set to 50V, and every lattice time of transverse axis is set to 50ms, and wherein being provided with of coordinate unit can be provided with according to the actual requirements voluntarily.
Step S301, with oscillographic first passage, second channel corresponding with protective device in the outlet to be measured of isolating switch electrically connect.Please be simultaneously referring to Fig. 2, the first passage of oscillograph 10, the outlet electric connection to be measured of passing through isolating switch 20 in probe and the protective device that second channel is corresponding, and the outlet of the preferential tripping operation of the first passage of oscillograph 10 and isolating switch 20 electrically connects.
Step S302 carries out transmission test.For example, selecting oscillograph is Single mode of operation (only writing down the waveform of one-period), then protective device is carried out isolating switch breaker tripping and closing test.
Step S303, the waveform that produces according to oscillograph and the coordinate unit analysis waveform of setting also calculate the mistiming between the outlet to be measured of isolating switch.For example, the outlet 1 of known isolating switch 20 is closed behind 50mS, and the outlet 2 of isolating switch 20 is closed behind 350mS, please be simultaneously referring to Fig. 3, and first passage waveform 11, second channel waveform 22 that the oscillograph 10 that is connected with isolating switch 20 produces, transverse axis one lattice are 50mS.Can observe first passage waveform 11 and second channel waveform 22 time phase difference 6 lattice of undergoing mutation, promptly 300mS explain that the time limit of tripping is accurate.
Main transformer protection tripping operation time limit method of calibration provided by the invention; Use oscillograph 10 to be connected with the outlet to be measured of isolating switch 20; Main transformer protection time limit of tripping is represented through oscillogram; So can accurately measure through the saltus step lattice number of measuring first passage, second channel waveform; Because main transformer protection tripping operation time limit method of calibration provided by the invention need not torn the loop open, only needs to calculate time value through the waveform that shows on the oscillograph and just can accomplish verification operation, the corresponding effect method of the prior art of main transformer protection tripping operation time limit method of calibration therefore provided by the invention is simple to operate.

Claims (2)

1. main transformer protection tripping operation time limit method of calibration may further comprise the steps:
Oscillograph trigger mode, trigger condition and coordinate unit are set, and wherein the every lattice of the transverse axis in the coordinate unit are time value;
With oscillographic first passage, second channel outlet electric connection to be measured corresponding and isolating switch;
Carry out transmission test;
The waveform that produces according to oscillograph and the coordinate unit analysis waveform of setting also calculate the mistiming between the outlet to be measured of isolating switch.
2. main transformer protection according to claim 1 tripping operation time limit method of calibration is characterized in that: oscillograph trigger mode, trigger condition and coordinate unit are set, and wherein the every lattice of the transverse axis in the coordinate unit are that the step of time value is specially:
It is general mode, DC voltage that trigger mode is set;
Trigger condition is set: passage one triggers, trigger the upper edge, and the trigger slope level is set to 40-50V, is provided with to trigger the back record ripple time and be about 1s;
Coordinate unit is set: the every lattice of the longitudinal axis are set to 50V, and every lattice time of transverse axis is set to 50ms.
CN2011103236510A 2011-10-24 2011-10-24 Main transformer protection tripping time limit check method Pending CN102508153A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2011103236510A CN102508153A (en) 2011-10-24 2011-10-24 Main transformer protection tripping time limit check method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2011103236510A CN102508153A (en) 2011-10-24 2011-10-24 Main transformer protection tripping time limit check method

Publications (1)

Publication Number Publication Date
CN102508153A true CN102508153A (en) 2012-06-20

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN2011103236510A Pending CN102508153A (en) 2011-10-24 2011-10-24 Main transformer protection tripping time limit check method

Country Status (1)

Country Link
CN (1) CN102508153A (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5065101A (en) * 1990-03-07 1991-11-12 Nec Electronics, Inc. Mini-relay or reed relay tester
US6486674B2 (en) * 2000-01-27 2002-11-26 Siemens Aktiengesellschaft Method for detecting faults on safety oriented sensors
US20100066376A1 (en) * 2008-09-16 2010-03-18 Omicron Electronics Gmbh Method for testing a protective device, a protective device, and test device
CN201993445U (en) * 2011-01-25 2011-09-28 衡水供电公司 Intelligent tester for switch trip logic time

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5065101A (en) * 1990-03-07 1991-11-12 Nec Electronics, Inc. Mini-relay or reed relay tester
US6486674B2 (en) * 2000-01-27 2002-11-26 Siemens Aktiengesellschaft Method for detecting faults on safety oriented sensors
US20100066376A1 (en) * 2008-09-16 2010-03-18 Omicron Electronics Gmbh Method for testing a protective device, a protective device, and test device
CN201993445U (en) * 2011-01-25 2011-09-28 衡水供电公司 Intelligent tester for switch trip logic time

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
戴文雯: "正确使用示波器", 《黑龙江科技信息》 *
李宪优等: "利用示波器精确测量传输线延迟时间", 《核电子学与探测技术》 *

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Application publication date: 20120620