CN104062624A - Direct-current high-voltage voltage divider calibrating method based on standard arm insertion method - Google Patents
Direct-current high-voltage voltage divider calibrating method based on standard arm insertion method Download PDFInfo
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Abstract
The invention relates to a direct-current high-voltage voltage divider calibrating method based on a standard arm insertion method. The direct-current high-voltage voltage divider calibrating method includes the steps that (1), a standard arm formed by connecting a resistor R2 and a resistor R3 in series is sent to a superior metrological verification mechanism, an actual value under a nominal voltage division ratio is obtained, and meanwhile the value of the resistor R2 is obtained; (2), a circuit used for calibration is set up; (3), a voltage divider is calibrated according to ten percent of nominal voltage of the calibration point; (4), an actual voltage division ratio of the calibrated voltage divider at the calibration point is obtained; (5), the step (2), the step (3) and the step (4) are repeated, and the actual voltage division ratios at the calibration point with twenty percent, fifty percent, eighty percent and one hundred percent of the nominal voltage are respectively measured. The direct-current high-voltage voltage divider calibrating method provides powerful help for value traceability of the direct-current high-voltage voltage divider, transport cost in the submitted inspection process is greatly reduced, accidental damage to the calibrated voltage divider in the long-distance transport process is avoided, and meanwhile the requirement for value transmission of a standard voltage divider can be met.
Description
Technical field
The invention belongs to field of measuring techniques, especially a kind of high direct voltage voltage divider calibration steps based on standard arm insertion.
Background technology
Along with the application of DC high voltage technology in national economy and national defense industry is increasingly extensive, the pin-point accuracy measurement of DC high voltage becomes problem in the urgent need to address.The foundation of DC high voltage measurement standard is the basis of the unification of DC high voltage value and transmission of quantity value.The key of setting up DC high voltage standard is the magnitude tracing problem that will solve DC high voltage.
In the world since eighties of last century the seventies, including the states such as the U.S., Germany, Britain, Italy, Japan, Russia, Australia, 100kV or the DC high voltage measurement standard of voltage levels are more all successively set up.In these national DC high voltage measurement standard, DC high voltage voltage divider is generally used as the major equipment of DC high voltage magnitude tracing, realizes DC high voltage tracing to the source to volt benchmark by DC high voltage ratio criteria.The structure of these DC high voltage voltage dividers is not quite similar, and actuating medium also has dividing of insulating oil and gas (air or compressed inert), and therefore their calibration steps is also different.But, no matter adopt which kind of method, all need to be traced to the source by higher level's metering validation activity, under many circumstances, standard direct current high-voltage bleeder need be transported to trace to the source mechanism or the mechanism that traces to the source is transported to its high-grade standard voltage divider by voltage divider location, school, this is all inevitably to being caused and jolt or collide with by school voltage divider or standard voltage divider, to the stable existence hidden danger of equipment.Meanwhile, because high direct voltage standard voltage divider volume is large, Heavy Weight, transport and loading and unloading are very heavy.
Summary of the invention
The object of the invention is in order to overcome the deficiencies in the prior art, a kind of high direct voltage voltage divider calibration steps based on standard arm insertion is provided.
The present invention solves its technical matters and takes following technical scheme to realize:
A high direct voltage voltage divider calibration steps based on standard arm insertion, comprises that step is as follows:
(1) by low-voltage standards voltage divider, the standard arm being made up of resistance R 2 resistance in series R3 is delivered to higher level's metering validation activity, obtains the actual value under nominal intrinsic standoff ratio, obtains the value of resistance R 2 simultaneously;
(2) build the circuit for calibrating, this circuit comprises both ends of power resistance R 1 and resistance R 4 calibration voltage divider in series, the standard arm that resistance R 2 and resistance R 3 are in series and formed by resistance R 5 resistance in series R6 by alignment flow standard voltage divider, between the node between the node between resistance R 5 and resistance R 6 and resistance R 2 and resistance R 3, serial connection zero indicator G and milivoltmeter Δ U, on the node between resistance R 3 and resistance R 4, double-pole single throw K1 is set, K switch 1 closure forms the series circuit of resistance R 1 and resistance R 4, K switch 1 is opened and is formed resistance R 1, R2, the series circuit of R3 and R4,
(3) according to calibration point 10% rated voltage calibration: concrete steps are:
1. first in the time that K1 is closed, will be calibrated high direct voltage voltage divider, resistance R 5 resistance in series R6 use high direct voltage voltage divider with calibration, and resistance R 1 resistance in series R4 carries out intrinsic standoff ratio transmission, and regulating resistance R4 makes zero indicator nulling, and now, bridge balance has:
2. keep the value of resistance R 4 constant, K switch 1 is opened, make standard arm, resistance R 2 resistance in series R3 are inserted between resistance R 1 and resistance R 4, and regulating resistance R3 makes zero indicator nulling again, now has:
(4) obtain by school voltage divider the actual intrinsic standoff ratio at this calibration point; According to equal ratios theorem, by school voltage divider intrinsic standoff ratio,
because resistance R 2 is provided by the higher level mechanism that traces to the source, resistance R 3 is the measured value of step (3), thus, can obtain the actual intrinsic standoff ratio at this calibration point by school voltage divider;
(5) repeat above-mentioned (2), (3), (4) step, measure respectively the actual intrinsic standoff ratio of other 20%, 50%, 80%, 100% rated voltage calibration points.
And, in described step (1), also should trace to the source accordingly to resistance R 3, guarantee its resistance value accurately and reliably.
And resistance R 1, resistance R 4 form calibration voltage divider in described step (2), its rated voltage is with consistent by alignment flow standard voltage divider.
Advantage of the present invention and good effect are:
The magnitude tracing work to high direct voltage voltage divider is provided strong help by the present invention, greatly reduce the transportation cost in censorship process, avoid the accidental injury in long-distance transportation process by school standard voltage divider, also can meet the transmission of quantity value demand of standard voltage divider simultaneously.
Brief description of the drawings
Fig. 1 is the circuit theory diagrams of standard arm insertion calibration of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the invention process is further described, following examples are descriptive, are not determinate, can not limit protection scope of the present invention with this.
A high direct voltage voltage divider calibration steps based on standard arm insertion, comprises that step is as follows:
(1) by low-voltage standards voltage divider, the standard arm being made up of resistance R 2 resistance in series R3 is delivered to higher level's metering validation activity, obtains the actual value under nominal intrinsic standoff ratio (as 100000:10), obtains the value of resistance R 2 simultaneously;
(2) build the circuit for calibrating, as shown in Figure 1, this circuit comprises both ends of power resistance R 1 and resistance R 4 calibration voltage divider in series, the standard arm that resistance R 2 and resistance R 3 are in series and formed by resistance R 5 resistance in series R6 by alignment flow standard voltage divider, between the node between the node between resistance R 5 and resistance R 6 and resistance R 2 and resistance R 3, serial connection zero indicator G and milivoltmeter Δ U, on the node between resistance R 3 and resistance R 4, double-pole single throw K1 is set, K switch 1 closure forms the series circuit of resistance R 1 and resistance R 4, K switch 1 is opened and is formed resistance R 1, R2, the series circuit of R3 and R4,
(3) according to calibration point 10% rated voltage calibration: concrete steps are:
1. first in the time that K1 is closed, will be calibrated high direct voltage voltage divider, resistance R 5 resistance in series R6 use high direct voltage voltage divider with calibration, and resistance R 1 resistance in series R4 carries out intrinsic standoff ratio transmission, and regulating resistance R4 makes zero indicator nulling, and now, bridge balance has:
2. keep the value of resistance R 4 constant, K switch 1 is opened, make standard arm, resistance R 2 resistance in series R3 are inserted between resistance R 1 and resistance R 4, and regulating resistance R3 makes zero indicator nulling again, now has:
(4) obtain by school voltage divider the actual intrinsic standoff ratio at this calibration point; According to equal ratios theorem, by school voltage divider intrinsic standoff ratio,
because resistance R 2 is provided by the higher level mechanism that traces to the source, resistance R 3 is the measured value of step (3), thus, can obtain the actual intrinsic standoff ratio at this calibration point by school voltage divider.Like this, just need not directly send school by standard direct current high-voltage bleeder, bring great convenience to the work of tracing to the source, also avoid that volume is large, the standard divider of Heavy Weight is sending the infringement causing in the process of school, effectively ensured the reliable delivery of value.
(5) repeat above-mentioned (2), (3), (4) step, measure respectively the actual intrinsic standoff ratio of other 20%, 50%, 80%, 100% rated voltage calibration points.
In specific embodiment of the invention, in described step (1), also should trace to the source accordingly to resistance R 3, guarantee its resistance value accurately and reliably.
In specific embodiment of the invention, in described step (2), resistance R 1, resistance R 4 form calibration voltage divider, and its rated voltage is with consistent by alignment flow standard voltage divider.
Claims (3)
1. the high direct voltage voltage divider calibration steps based on standard arm insertion, is characterized in that comprising that step is as follows:
(1) by low-voltage standards voltage divider, the standard arm being made up of resistance R 2 resistance in series R3 is delivered to higher level's metering validation activity, obtains the actual value under nominal intrinsic standoff ratio, obtains the value of resistance R 2 simultaneously;
(2) build the circuit for calibrating; This circuit comprise resistance R 1 and resistance R 4 voltage divider, resistance R 2 and resistance R 3 for calibration in series standard arm in series and formed by resistance R 5 resistance in series R6 by alignment flow standard voltage divider, between the node between the node between resistance R 5 and resistance R 6 and resistance R 2 and resistance R 3, serial connection zero indicator G and milivoltmeter Δ U, on the node between resistance R 3 and resistance R 4, double-pole single throw K1 is set, K switch 1 closure forms the series circuit of resistance R 1 and resistance R 4, and K switch 1 is opened the series circuit that forms resistance R 1, R2, R3 and R4;
(3) according to calibration point 10% rated voltage calibration, concrete steps are:
1. first in the time that K1 is closed, will be calibrated high direct voltage voltage divider, resistance R 5 resistance in series R6 use high direct voltage voltage divider with calibration, and resistance R 1 resistance in series R4 carries out intrinsic standoff ratio transmission, and regulating resistance R4 makes zero indicator nulling, and now, bridge balance has:
2. keep the value of resistance R 4 constant, K switch 1 is opened, make standard arm, resistance R 2 resistance in series R3 are inserted between resistance R 1 and resistance R 4, and regulating resistance R3 makes zero indicator nulling again, now has:
(4) obtain by school voltage divider the actual intrinsic standoff ratio at this calibration point; According to equal ratios theorem, by school voltage divider intrinsic standoff ratio,
because resistance R 2 is provided by the higher level mechanism that traces to the source, resistance R 3 is the measured value of step (3), thus, can obtain the actual intrinsic standoff ratio at this calibration point by school voltage divider;
(5) repeat above-mentioned (2), (3), (4) step, measure respectively the actual intrinsic standoff ratio of other 20%, 50%, 80%, 100% rated voltage calibration points.
2. the high direct voltage voltage divider calibration steps based on standard arm insertion according to claim 1, is characterized in that: in described step (1), also should trace to the source accordingly to resistance R 3, guarantee its resistance value accurately and reliably.
3. the high direct voltage voltage divider calibration steps based on standard arm insertion according to claim 1, it is characterized in that: in described step (2), resistance R 1, resistance R 4 form calibration voltage divider, and its rated voltage is with consistent by alignment flow standard voltage divider.
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Cited By (6)
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| CN105137378A (en) * | 2015-08-14 | 2015-12-09 | 中国电力科学研究院 | 2/1 voltage ratio self-calibration method of voltage divider |
| CN106291066A (en) * | 2016-10-31 | 2017-01-04 | 西安交通大学 | A kind of DC high voltage based on divider time sharing sampling is measured and correction system and method |
| CN107247248A (en) * | 2017-08-09 | 2017-10-13 | 辽宁省计量科学研究院 | Voltage calibration device and system |
| CN108761367A (en) * | 2018-04-20 | 2018-11-06 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | One kind ± 800kV extra-high voltage direct-current divider calibrate analysis method |
| CN111781553A (en) * | 2020-06-28 | 2020-10-16 | 云南电网有限责任公司电力科学研究院 | Voltage divider calibration system and method |
| CN113484811A (en) * | 2021-05-26 | 2021-10-08 | 中国电力科学研究院有限公司 | Self-calibration method and system for direct-current resistor voltage divider |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105137378A (en) * | 2015-08-14 | 2015-12-09 | 中国电力科学研究院 | 2/1 voltage ratio self-calibration method of voltage divider |
| CN105137378B (en) * | 2015-08-14 | 2018-11-09 | 中国电力科学研究院 | A kind of 2/1 intrinsic standoff ratio method for self-calibrating of divider |
| CN106291066A (en) * | 2016-10-31 | 2017-01-04 | 西安交通大学 | A kind of DC high voltage based on divider time sharing sampling is measured and correction system and method |
| CN106291066B (en) * | 2016-10-31 | 2019-02-05 | 西安交通大学 | A kind of DC high voltage measurement and correction system and method based on divider time sharing sampling |
| CN107247248A (en) * | 2017-08-09 | 2017-10-13 | 辽宁省计量科学研究院 | Voltage calibration device and system |
| CN108761367A (en) * | 2018-04-20 | 2018-11-06 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | One kind ± 800kV extra-high voltage direct-current divider calibrate analysis method |
| CN111781553A (en) * | 2020-06-28 | 2020-10-16 | 云南电网有限责任公司电力科学研究院 | Voltage divider calibration system and method |
| CN111781553B (en) * | 2020-06-28 | 2022-09-02 | 云南电网有限责任公司电力科学研究院 | System and method for verifying voltage divider |
| CN113484811A (en) * | 2021-05-26 | 2021-10-08 | 中国电力科学研究院有限公司 | Self-calibration method and system for direct-current resistor voltage divider |
| CN113484811B (en) * | 2021-05-26 | 2023-12-26 | 中国电力科学研究院有限公司 | Self-calibration method and system for direct-current resistor voltage divider |
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Address after: 300010 Tianjin city Hebei District Wujing Road No. 39 Applicant after: State Grid Corporation of China Applicant after: State Grid Tianjin Electric Power Company Address before: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Applicant before: State Grid Corporation of China Applicant before: State Grid Tianjin Electric Power Company |
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Application publication date: 20140924 |