CN111856383B - Indirect measurement method for sensitivity of high-frequency pulse sensor - Google Patents
Indirect measurement method for sensitivity of high-frequency pulse sensor Download PDFInfo
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- CN111856383B CN111856383B CN202010740204.4A CN202010740204A CN111856383B CN 111856383 B CN111856383 B CN 111856383B CN 202010740204 A CN202010740204 A CN 202010740204A CN 111856383 B CN111856383 B CN 111856383B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/02—Testing or calibrating of apparatus covered by the other groups of this subclass of auxiliary devices, e.g. of instrument transformers according to prescribed transformation ratio, phase angle, or wattage rating
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/02—Measuring characteristics of individual pulses, e.g. deviation from pulse flatness, rise time or duration
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
- G01R31/1263—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation
- G01R31/1272—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation of cable, line or wire insulation, e.g. using partial discharge measurements
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
An indirect measurement method for sensitivity of a high-frequency pulse sensor relates to the field of power failure equipment, and comprises the following steps: sleeving a high-frequency pulse sensor on a loop of a first signal wire of a partial discharge signal calibration source, and connecting the output of the high-frequency pulse sensor to an electric pulse partial discharge instrument by using a second signal wire; adjusting the partial discharge signal calibration source to enable the electric quantity output by the partial discharge signal calibration source to be gradually increased from zero, observing the discharge quantity displayed on the electric pulse partial discharge instrument, and recording the minimum discharge quantity Q displayed on the electric pulse partial discharge instrument; the sensitivity of the high-frequency pulse sensor is estimated with reference to the minimum discharge amount Q. The invention utilizes the partial discharge signal calibration source, the electric pulse partial discharge instrument, the insulating clamp and the like to construct a measuring device which is simple in connection and low in cost and aims at the sensitivity of the high-frequency pulse sensor, and the sensitivity of the high-frequency pulse sensor can be accurately measured by combining a designed calculation method and specific requirements on the detecting device.
Description
Technical Field
The invention relates to the field of power failure equipment, in particular to an indirect measurement method for the sensitivity of a high-frequency pulse sensor.
Background
The high-frequency pulse sensor is a common magnetic field induction sensor which is matched with a power equipment fault detector and is used for detecting the faults of the power equipment. The sensitivity of the high-frequency pulse sensor can directly influence the acquisition of fault signals of the high-frequency pulse sensor, and further influence the detection result of the power equipment fault detector, so that the normal sensitivity of the high-frequency pulse sensor is one of important bases for the accuracy of the power equipment fault detector. However, there is currently no fast and efficient sensitivity measurement method for high frequency pulse sensors.
Disclosure of Invention
The invention provides an indirect measurement method for the sensitivity of a high-frequency pulse sensor, which aims to solve the problems in the prior art.
The technical scheme adopted by the invention is as follows:
an indirect measurement method for the sensitivity of a high-frequency pulse sensor comprises the following steps: 1. sleeving a high-frequency pulse sensor on a loop of a first signal wire of a partial discharge signal calibration source, and connecting the output of the high-frequency pulse sensor to an electric pulse partial discharge instrument by using a second signal wire; 2. adjusting the partial discharge signal calibration source to enable the electric quantity output by the partial discharge signal calibration source to gradually increase from zero, observing the discharge quantity displayed on the electric pulse partial discharge instrument, and recording the minimum discharge quantity Q displayed on the electric pulse partial discharge instrument; 3. and taking the minimum discharge quantity Q as a preliminary estimation value of the sensitivity of the high-frequency pulse sensor.
Further, the method also comprises the following steps: 4. repeating the step 2 and the step 3N-1 times, and marking the initial estimation value of the sensitivity of the ith time as Q i N is not less than 2 and is an integer; 5. calculating an estimated value of the sensitivity of the high-frequency pulse sensor according to the following formula:
in the formula, Q i Represents the minimum discharge quantity displayed and recorded on the ith electric pulse partial discharge instrument, Δ q represents the detection sensitivity of the electric pulse partial discharge instrument, and λ 1 、λ 2 Representing the weight coefficients.
Further, in the step 1, the first signal lines passing through two sides of the high-frequency pulse sensor are straightened by using two insulating clamps, and the first signal lines vertically pass through the high-frequency pulse sensor.
Further, the distance h from the insulating fixture to the high-frequency pulse sensor needs to satisfy the following formula:
wherein D is the outer diameter of the high-frequency pulse sensor, a is a constant, L is the linear distance between the partial discharge signal calibration source and the high-frequency pulse sensor, mu is the magnetic permeability of the first signal line, I max The maximum current of the first signal line is theta, the included angle between a connecting line from the partial discharge signal calibration source to the high-frequency pulse sensor and the straightening line segment of the first signal line is theta, R is the resistance of the first signal line, and d is the inner diameter of the high-frequency pulse sensor.
Further, before starting step 2, the high-frequency pulse sensor, the straightening line segment and the second signal line are placed in a signal shielding box for isolating external signals.
Further, the method also comprises the following steps: 6. in satisfying
On the premise of changing the installation position of the high-frequency pulse sensor by up-down movement adjustment, repeating the steps from 2 to 5M-1 times, and recording the estimated value of the sensitivity of the jth time as delta Q j Then, the average value of the estimated value of the sensitivity of the high-frequency pulse sensor is calculated according to the following formula
(ii) a Wherein M is an integer of 2 or more.
Compared with the prior art, the invention has the advantages that:
the invention utilizes the partial discharge signal calibration source, the electric pulse partial discharge instrument, the insulating clamp and the like to build a measuring device which is simple in connection and low in cost and aims at the sensitivity of the high-frequency pulse sensor, and the sensitivity of the high-frequency pulse sensor can be accurately measured by combining a designed calculation method and specific requirements on the detecting device.
Drawings
FIG. 1 is a schematic view of a measuring apparatus according to the present invention.
Detailed Description
The following describes embodiments of the present invention with reference to the drawings. Numerous details are set forth below in order to provide a thorough understanding of the present invention, but it will be apparent to those skilled in the art that the present invention may be practiced without these details.
As shown in fig. 1, an indirect measurement apparatus for sensitivity of a high-frequency pulse sensor includes a partial discharge signal calibration source 1, a first signal line 2, a second signal line 5, an electric pulse partial discharge instrument 6, a high-frequency pulse sensor 4 to be measured, an insulating fixture 3 and a shielding box 7, wherein two ends of the second signal line 5 are connected to the partial discharge signal calibration source 1 to form a loop, the second signal line 5 is inserted into the high-frequency pulse sensor 4, and an output end of the high-frequency pulse sensor 4 is connected to the electric pulse partial discharge instrument 6 through the second signal line 5.
As shown in fig. 1, specifically, two insulating clamps 3 are clamped to the first signal line 2, so that the first signal line 2 is straightened and vertically passes through the axial center line of the high-frequency pulse sensor 4. The first signal line 2 forms a straightened-out line section 21 between the two insulating holders 3.
As shown in fig. 1, specifically, the upper and lower peripheral surfaces of the shielding box 7 are respectively provided with a threading hole, and each threading hole is provided with an insulating clamp 3, and the second signal line 5, the first signal line 2 straightened between the two insulating clamps 3, and the high-frequency pulse sensor 4 are arranged inside the shielding box 7.
As shown in fig. 1, a mounting mechanism for horizontally mounting the high-frequency pulse sensor 4 is also provided inside the shield case 7. Specifically, the mounting mechanism includes a first numerical control sliding table 81, a second numerical control sliding table 82, an upper glass plate 91 and a lower glass plate 92, wherein the upper glass plate 91 is movably arranged in the shielding box 7 up and down through the first numerical control sliding table 81 and is used for supporting the upper end surface of the high-frequency pulse sensor 4; the lower glass plate 92 is movably disposed on the shielding box 7 up and down through the second numerical control sliding table 82, and is used for supporting the lower end surface of the high-frequency pulse sensor 4, and the upper glass plate 91 and the lower glass plate 92 are both provided with through holes penetrating through the first signal line 2.
As shown in fig. 1, a plurality of positioning blocks 90 for abutting against the outer side wall of the high-frequency pulse sensor 4 are disposed on the top surface of the upper glass plate 91 and the bottom surface of the lower glass plate 92 in a ring shape.
As shown in fig. 1, the method for measuring the sensitivity of the high-frequency pulse sensor by using the measuring device comprises the following steps:
1. the high-frequency pulse sensor 4 is sleeved on a loop of a first signal wire 2 of the partial discharge signal calibration source 1, and the output of the high-frequency pulse sensor 4 is connected to an electric pulse partial discharge instrument 6 by a second signal wire 5.
Specifically, the first signal lines 2 passing through both sides of the high-frequency pulse sensor 4 are straightened by the two insulating jigs 3, and the first signal lines 2 are made to pass vertically through the high-frequency pulse sensor 4.
Moreover, in order to improve the accuracy of measurement, the distance h from the insulating jig 3 to the high-frequency pulse sensor 4 needs to satisfy the following formula:
wherein D is the outer diameter of the high-frequency pulse sensor 4, a is a constant, L is the linear distance between the partial discharge signal calibration source 1 and the high-frequency pulse sensor 4, mu is the magnetic permeability of the first signal line 2, and I max The maximum current of the first signal line 2, θ is the angle between the connection line from the partial discharge signal calibration source 1 to the high-frequency pulse sensor 4 and the straightening line segment 21 of the first signal line 2, R is the resistance of the first signal line 2, and d is the inner diameter of the high-frequency pulse sensor 4. The first numerical control sliding table and the second numerical control sliding table of the mounting mechanism are matched with each other, so that the upper glass plate and the lower glass plate can be utilized to fix the high-frequency pulse sensor 4 to meet the requirement
At a suitable position to facilitate subsequent measurement.
In order to further improve the measurement accuracy, the high-frequency pulse sensor 4, the straightening line segment 21, and the second signal line 5 are placed in a signal shielding box 7 for isolating external signals.
2. Adjusting the partial discharge signal calibration source 1 to gradually increase the electric quantity output by the partial discharge signal calibration source 1 from zero, observing the discharge quantity displayed on the electric pulse partial discharge instrument 6, and recording the minimum discharge quantity Q displayed on the electric pulse partial discharge instrument 6;
3. taking the minimum discharge quantity Q as a preliminary estimation value of the sensitivity of the high-frequency pulse sensor 4;
4. repeating the step 2 and the step 3N-1 times, and marking the initial estimation value of the sensitivity of the ith time as Q i I.e. the minimum discharge quantity displayed on the ith electric pulse partial discharge instrument 6 is Q i N is not less than 2 and is an integer;
5、considering the influence of the electric pulse partial discharge instrument 6 on the test, the estimated value of the sensitivity of the high-frequency pulse sensor 4 is calculated according to the following formula:
in the formula, Q i Represents the minimum discharge quantity displayed and recorded on the ith electric pulse partial discharge instrument 6, Δ q represents the detection sensitivity of the electric pulse partial discharge instrument 6, and λ 1 、λ 2 Representing the weight coefficients.
6. In addition, in order to improve the accuracy of the data, the method is satisfied
On the premise of (1), the mounting position of the high-frequency pulse sensor 4 is adjusted up and down through the mounting mechanism, then the steps 2 to 5 are repeated for M-1 times, and the estimated value of the sensitivity of the jth time is recorded as delta Q j Then, the average value of the estimated values of the sensitivity of the high-frequency pulse sensor 4 is calculated according to the following formula
(ii) a Wherein, is not less than 2 and is an integer.
The above description is only an embodiment of the present invention, but the design concept of the present invention is not limited thereto, and any insubstantial modifications made by using the design concept should fall within the scope of infringing the present invention.
Claims (5)
1. An indirect measurement method for the sensitivity of a high-frequency pulse sensor is characterized by comprising the following steps: 1) sleeving the high-frequency pulse sensor on a loop of a first signal wire of the partial discharge signal calibration source, and connecting the output of the high-frequency pulse sensor to an electric pulse partial discharge instrument by using a second signal wire; 2) adjusting the partial discharge signal calibration source to enable the electric quantity output by the partial discharge signal calibration source to gradually increase from zero, observing the discharge quantity displayed on the electric pulse partial discharge instrument, and recording the minimum discharge quantity Q displayed on the electric pulse partial discharge instrument; 3) taking the minimum discharge quantity Q as a preliminary estimation value of the sensitivity of the high-frequency pulse sensor; 4) repeating step 2) and step N-1 timesStep 3), marking the preliminary estimation value of the sensitivity of the ith time as Q i N is not less than 2 and is an integer; 5) and calculating to obtain an estimated value of the sensitivity of the high-frequency pulse sensor according to the following formula:
in the formula, Q i Represents the minimum discharge quantity displayed and recorded on the ith electric pulse partial discharge instrument, Δ q represents the detection sensitivity of the electric pulse partial discharge instrument, and λ 1 、λ 2 Representing the weight coefficients.
2. The indirect measurement method for the sensitivity of the high-frequency pulse sensor according to claim 1, characterized in that: in the step 1), the first signal wires penetrating through two sides of the high-frequency pulse sensor are straightened by using two insulating clamps, and the first signal wires vertically penetrate through the high-frequency pulse sensor.
3. The indirect measurement method of the sensitivity of the high-frequency pulse sensor according to claim 2, characterized in that: the distance h from the insulating clamp to the high-frequency pulse sensor needs to satisfy the following formula:
wherein D is the outer diameter of the high-frequency pulse sensor, a is a constant, L is the linear distance between the partial discharge signal calibration source and the high-frequency pulse sensor, mu is the magnetic permeability of the first signal line, and I max The maximum current of the first signal line is theta, the included angle between a connecting line from the partial discharge signal calibration source to the high-frequency pulse sensor and the straightening line segment of the first signal line is theta, R is the resistance of the first signal line, and d is the inner diameter of the high-frequency pulse sensor.
4. The indirect measurement method for the sensitivity of the high-frequency pulse sensor according to claim 2, characterized in that: before starting the step 2), the high-frequency pulse sensor, the straightening line segment and the second signal line are placed in a signal shielding box for isolating external signals.
5. The indirect measurement method of the sensitivity of the high-frequency pulse sensor according to claim 1, further comprising the steps of: 6) is meeting
Under the premise of (1), the installation position of the high-frequency pulse sensor is changed by up-and-down movement adjustment, and then the steps from 2) to 5) are repeated for M-1 times, and the estimated value of the sensitivity of the jth time is recorded as delta Q j Then, the average value of the estimated value of the sensitivity of the high-frequency pulse sensor is calculated according to the following formula
(ii) a Wherein M is an integer of 2 or more.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101706562A (en) * | 2009-09-08 | 2010-05-12 | 保定天威集团有限公司 | Calibration device of hand-held type local-discharge ultrasonic sensor |
| CN103197212A (en) * | 2013-03-29 | 2013-07-10 | 国家电网公司 | Global information system (GIS) partial discharge on-line monitoring calibration instrument and configuration authentication method thereof |
| CN104215925A (en) * | 2014-09-09 | 2014-12-17 | 广州供电局有限公司 | High-frequency sensor and sensitivity detecting device and method thereof |
| CN205229440U (en) * | 2015-12-15 | 2016-05-11 | 国网北京市电力公司 | A detecting system for detecting partial discharge detector |
| CN109270414A (en) * | 2018-07-23 | 2019-01-25 | 北方夜视技术股份有限公司 | Day blind ultraviolet-cameras discharge examination sensitivity test method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2482089B1 (en) * | 2010-02-24 | 2018-06-13 | Omicron electronics GmbH | Method and system for locating a defect in a cable |
-
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- 2020-07-28 CN CN202010740204.4A patent/CN111856383B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101706562A (en) * | 2009-09-08 | 2010-05-12 | 保定天威集团有限公司 | Calibration device of hand-held type local-discharge ultrasonic sensor |
| CN103197212A (en) * | 2013-03-29 | 2013-07-10 | 国家电网公司 | Global information system (GIS) partial discharge on-line monitoring calibration instrument and configuration authentication method thereof |
| CN104215925A (en) * | 2014-09-09 | 2014-12-17 | 广州供电局有限公司 | High-frequency sensor and sensitivity detecting device and method thereof |
| CN205229440U (en) * | 2015-12-15 | 2016-05-11 | 国网北京市电力公司 | A detecting system for detecting partial discharge detector |
| CN109270414A (en) * | 2018-07-23 | 2019-01-25 | 北方夜视技术股份有限公司 | Day blind ultraviolet-cameras discharge examination sensitivity test method |
Non-Patent Citations (1)
| Title |
|---|
| 超声波局部放电检测仪校验方法研究及应用;杨宁;《电测与仪表》;20141125;第104-109页 * |
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