CN110441664A - A kind of lower Partial Discharge Measurement System of harmonic voltage effect - Google Patents
A kind of lower Partial Discharge Measurement System of harmonic voltage effect Download PDFInfo
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- CN110441664A CN110441664A CN201910812536.6A CN201910812536A CN110441664A CN 110441664 A CN110441664 A CN 110441664A CN 201910812536 A CN201910812536 A CN 201910812536A CN 110441664 A CN110441664 A CN 110441664A
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- harmonic voltage
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- partial discharge
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- 238000005259 measurement Methods 0.000 title claims abstract description 31
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- 238000012360 testing method Methods 0.000 claims abstract description 81
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- 238000000034 method Methods 0.000 claims description 10
- 238000002474 experimental method Methods 0.000 claims description 5
- 230000005611 electricity Effects 0.000 claims 1
- 230000007547 defect Effects 0.000 abstract description 2
- 238000011981 development test Methods 0.000 abstract description 2
- 238000004590 computer program Methods 0.000 description 7
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/28—Provision in measuring instruments for reference values, e.g. standard voltage, standard waveform
-
- 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
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- Testing Relating To Insulation (AREA)
Abstract
The invention discloses a kind of harmonic voltages to act on lower Partial Discharge Measurement System, including harmonic voltage testing transformer and several measuring units being connected in series with the harmonic voltage testing transformer, each measuring unit includes filter, shelf depreciation test product and measurement impedance again, and successively sequence is grounded the harmonic voltage after the filter filtering after shelf depreciation test product and measurement impedance.Partial Discharge Measurement System of the invention studies influence of a variety of harmonic components to same test product in primary test, improves the speed of development test.In addition it also avoids the frequency of frequent Adjustment Tests power supply and changes the defect of test product state, the result for enabling discharge measuring test is more accurate.
Description
Technical field
The present invention relates to a kind of harmonic voltages to act on lower Partial Discharge Measurement System, belongs to electrical test equipment field.
Background technique
The DC equipments such as converter power transformer other than bearing conventional alternating voltage, can also bear to hand in the process of running
The specific types electric stress such as direct current and harmonic wave.
It especially will cause loss under harmonic voltage to increase, insulation damages.Research before is all the single 50Hz of research
Power-frequency voltage or pure DC voltage act on lower paper oil insulation or gas isolated Characteristics of Partial Discharge, and have accumulated a large amount of warp
It tests.But for the Characteristics of Partial Discharge research under harmonic voltage effect, since harmonic content is abundant, it tends to be difficult to by different harmonic waves
The voltage of component carries out independent separate, especially can not study a variety of harmonic components to the shadow of same test product in primary test
It rings, which results in the research at present for shelf depreciation under harmonic voltage is less.In addition it also needs frequently to adjust in the prior art
Experiment power supply frequency, to test influence of a variety of different harmonic components to same a collection of test product.
But the process of the frequency of frequent Adjustment Tests power supply can change test product state.
Summary of the invention
Goal of the invention: the present invention proposes that a kind of harmonic voltage acts on lower Partial Discharge Measurement System, avoids due to frequent
The frequency of Adjustment Tests power supply and the change for leading to test product state.
Technical solution: the technical solution adopted by the present invention is that a kind of harmonic voltage acts on lower Partial Discharge Measurement System, packet
At least one measuring unit for including harmonic voltage testing transformer and being connected in series with the harmonic voltage testing transformer, each
Measuring unit includes filter, shelf depreciation test product and measurement impedance, and the harmonic voltage after the filter filtering is successively
Sequence is grounded after shelf depreciation test product and measurement impedance.
The voltage signal that the harmonic voltage testing transformer generates contains different harmonic components.
Described three measuring units of having connected with harmonic voltage testing transformer.
Filter in three measuring units is passive filter.
The measurement impedance is 50 ohm.
The passive filter is high-pass filter.
- 3dB the frequency of three passive filters is respectively 75Hz, 125Hz and 175Hz.
A kind of lower method for measurement of partial discharge of harmonic voltage effect, comprising the following steps:
1) first time high-pass filtering, filtered signal access and first time high pass are carried out to the signal that experiment power supply issues
Filter corresponding shelf depreciation test product；
2) second of high-pass filtering, filtered signal access and second of high pass are carried out to the filtered signal of previous step
Filter corresponding shelf depreciation test product；
3) third time high-pass filtering, filtered signal access and third time high pass are carried out to the filtered signal of previous step
Filter corresponding shelf depreciation test product.
- 3dB the frequency of the first time high-pass filtering is 75Hz, and -3dB the frequency of second of high-pass filtering is 125Hz, the
- 3dB the frequency of high-pass filtering is 175Hz three times.
The utility model has the advantages that Partial Discharge Measurement System of the invention studies a variety of harmonic components to same in primary test
The influence of test product improves the speed of development test.In addition it also avoids the frequency of frequent Adjustment Tests power supply and changes test product
The defect of state, the result for enabling discharge measuring test are more accurate.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of measuring system of the present invention.
Specific embodiment
As shown in Figure 1, the present embodiment proposes that a kind of harmonic voltage acts on lower Partial Discharge Measurement System, including harmonic voltage
Testing transformer 1, the first passive filter 2, the second passive filter 3 and third passive filter 4, first partial electric discharge test product
5, the second shelf depreciation test product 7 and third shelf depreciation test product 9, first measure impedance 6, second and measure impedance 8 and third measurement
Impedance 10, oscillograph 11.
The harmonic voltage testing transformer 1 is experiment power supply, generates various test voltages, each test voltage by
Multiple harmonic components are formed by stacking.In the present embodiment harmonic voltage testing transformer 1 generate harmonic component include 50Hz,
100Hz, 150Hz and 200Hz.These harmonic voltages pass sequentially through the first passive filter 2, the second passive filter 3 and third
Passive filter 4.Different passive filters has different passband stopband ranges, can filter out the harmonic wave of specific frequency.Wherein
One passive filter 2 is high-pass filter, -3dB frequency 75Hz.Second passive filter 3 is high-pass filter, -3dB frequency
125Hz.Third passive filter 4 is high-pass filter, -3dB frequency 175Hz.
A shelf depreciation test product is connected in the output end of each passive filter, with the first passive filter 2, second
Correspondingly connection first partial electric discharge test product 5, the second shelf depreciation are tried respectively for passive filter 3 and third passive filter 4
Product 7 and third shelf depreciation test product 9.The other end of each shelf depreciation test product by measuring impedance earth accordingly.With first
Shelf depreciation test product 5, the second shelf depreciation test product 7 and third shelf depreciation test product 9 distinguish corresponding the first measurement of connection resistance
Anti- 6, second measurement impedance 8 and third measure impedance 10.Each shelf depreciation test product tie point for measuring impedance corresponding to its is made
For the measurement point of oscillograph 11, the discharge signal of the tie point introduces oscillograph 11 and measures.
First passive filter 2 filters out 50Hz fundamental wave, therefore 100Hz, 150Hz and 200Hz harmonic component are applied to
On one shelf depreciation test product 5.Second passive filter 3 continues to filter out 100Hz harmonic component, therefore 150Hz and 200Hz harmonic wave point
Amount is applied on the second shelf depreciation test product 7.Third passive filter 4 further filters out 150Hz harmonic component, then 200Hz
Harmonic component is applied on third shelf depreciation test product 9.
Shelf depreciation test product in the present embodiment can be the test product of same structure, for studying different harmonic components pair
The influence of a certain test product shelf depreciation.
Different test product structures can also be studied using the test product of different structure to the sensibility of harmonic component, i.e. research the
Sensibility of the one shelf depreciation test product 5 to 100Hz, 150Hz and 200Hz harmonic wave；Second shelf depreciation test product 7 to 150Hz and
The sensibility of 200Hz harmonic wave；Sensibility of the third shelf depreciation test product 9 to 200Hz harmonic wave.
The test voltage of harmonic component is applied on different shelf depreciation test products simultaneously in this way containing there are many, disposable complete
Test at the combination of individual harmonic components or harmonic component to electric discharge test product, and can the repeated multiple times voltage for changing experiment power supply
To obtain influence result of the different harmonic components to shelf depreciation test product.The present embodiment can also will be containing there are many harmonic component
One test voltage is applied on same shelf depreciation test product, tests different harmonic components to a certain shelf depreciation test product
It influences.
In addition the system also avoids in existing test method, frequently adjusts part brought by single test supply frequency
The change for test product state of discharging, this state change the change of mainly space charge, will lead to the electric discharge of shelf depreciation test product
The change of characteristic.
It should be understood by those skilled in the art that, embodiments herein can provide as method, system or computer program
Product.Therefore, complete hardware embodiment, complete software embodiment or reality combining software and hardware aspects can be used in the application
Apply the form of example.Moreover, it wherein includes the computer of computer usable program code that the application, which can be used in one or more,
The computer program implemented in usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.) produces
The form of product.
The application is referring to method, the process of equipment (system) and computer program product according to the embodiment of the present application
Figure and/or block diagram describe.It should be understood that every one stream in flowchart and/or the block diagram can be realized by computer program instructions
The combination of process and/or box in journey and/or box and flowchart and/or the block diagram.It can provide these computer programs
Instruct the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce
A raw machine, so that being generated by the instruction that computer or the processor of other programmable data processing devices execute for real
The device for the function of being specified in present one or more flows of the flowchart and/or one or more blocks of the block diagram.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works, so that it includes referring to that instruction stored in the computer readable memory, which generates,
Enable the manufacture of device, the command device realize in one box of one or more flows of the flowchart and/or block diagram or
The function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that counting
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, thus in computer or
The instruction executed on other programmable devices is provided for realizing in one or more flows of the flowchart and/or block diagram one
The step of function of being specified in a box or multiple boxes.
Finally it should be noted that: the above embodiments are merely illustrative of the technical scheme of the present invention and are not intended to be limiting thereof, to the greatest extent
Invention is explained in detail referring to above-described embodiment for pipe, it should be understood by those ordinary skilled in the art that: still
It can be with modifications or equivalent substitutions are made to specific embodiments of the invention, and without departing from any of spirit and scope of the invention
Modification or equivalent replacement, should all cover within the scope of the claims of the present invention.
Claims (9)
1. a kind of harmonic voltage acts on lower Partial Discharge Measurement System, it is characterised in that: including harmonic voltage testing transformer
(1) and with the harmonic voltage testing transformer (1) at least one measuring unit being connected in series, each measuring unit include filter
Wave device, shelf depreciation test product and measurement impedance, the harmonic voltage after the filter filtering are successively sequentially put by part
It is grounded after electric test product and measurement impedance.
2. harmonic voltage according to claim 1 acts on lower Partial Discharge Measurement System, it is characterised in that: the harmonic wave electricity
The voltage signal that pressure testing transformer (1) generates contains different harmonic components.
3. harmonic voltage according to claim 1 acts on lower Partial Discharge Measurement System, it is characterised in that: described and harmonic wave
Voltage test transformer (1) has been connected three measuring units.
4. harmonic voltage according to claim 3 acts on lower Partial Discharge Measurement System, it is characterised in that: three surveys
The filter measured in unit is passive filter.
5. harmonic voltage according to claim 3 acts on lower Partial Discharge Measurement System, it is characterised in that: the measurement resistance
Resist is 50 ohm.
6. harmonic voltage according to claim 4 acts on lower Partial Discharge Measurement System, it is characterised in that: the passive filter
Wave device is high-pass filter.
7. harmonic voltage according to claim 6 acts on lower Partial Discharge Measurement System, it is characterised in that: three nothings
- 3dB the frequency of source filter is respectively 75Hz, 125Hz and 175Hz.
8. a kind of harmonic voltage acts on lower method for measurement of partial discharge, which comprises the following steps:
1) first time high-pass filtering, filtered signal access and first time high-pass filtering are carried out to the signal that experiment power supply issues
Corresponding shelf depreciation test product；
2) second of high-pass filtering, filtered signal access and second of high-pass filtering are carried out to the filtered signal of previous step
Corresponding shelf depreciation test product；
3) third time high-pass filtering, filtered signal access and third time high-pass filtering are carried out to the filtered signal of previous step
Corresponding shelf depreciation test product.
9. harmonic voltage according to claim 8 acts on lower method for measurement of partial discharge, which is characterized in that the first time
- 3dB the frequency of high-pass filtering is 75Hz, and -3dB the frequency of second of high-pass filtering is the 125Hz, -3dB of third time high-pass filtering
Frequency is 175Hz.
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| CN201910812536.6A CN110441664A (en) | 2019-08-30 | 2019-08-30 | A kind of lower Partial Discharge Measurement System of harmonic voltage effect |
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|---|---|---|---|---|
| JPH06109799A (en) * | 1992-09-25 | 1994-04-22 | Meidensha Corp | Partial discharge detecting device |
| CN202474898U (en) * | 2011-12-23 | 2012-10-03 | 国彪电源集团有限公司 | Harmonic-recycling-type online uninterrupted power source system |
| CN103364618A (en) * | 2013-07-26 | 2013-10-23 | 武汉大学 | Measuring method for harmonic voltage on direct current side of high-voltage direct current power transmission system |
| CN104316796A (en) * | 2014-10-24 | 2015-01-28 | 国家电网公司 | High power harmonic power supply characteristic testing system and method |
| CN104345234A (en) * | 2014-10-24 | 2015-02-11 | 国网四川省电力公司电力科学研究院 | Harmonic power supply feature test system and method |
| CN104852388A (en) * | 2015-05-15 | 2015-08-19 | 国电南京自动化股份有限公司 | Chain SVG device with active filter function |
| US20160161543A1 (en) * | 2014-12-09 | 2016-06-09 | Rosemount Inc. | Partial discharge detection system |
| CN205680766U (en) * | 2016-06-22 | 2016-11-09 | 深圳市创屹集成器件有限公司 | A kind of wave filter based on LTCC |
| CN205753409U (en) * | 2015-12-30 | 2016-11-30 | 江苏省电力公司常州供电公司 | A kind of intermediate frequency furnace harmonic filter system of low cost |
| CN108732471A (en) * | 2018-04-26 | 2018-11-02 | 天津大学 | Multiple physical field based on superfrequency method couples paper oil insulation partial discharge detecting system |
| CN211293127U (en) * | 2019-08-30 | 2020-08-18 | 国网江苏省电力有限公司电力科学研究院 | Partial discharge measurement system under harmonic voltage effect |
-
2019
- 2019-08-30 CN CN201910812536.6A patent/CN110441664A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06109799A (en) * | 1992-09-25 | 1994-04-22 | Meidensha Corp | Partial discharge detecting device |
| CN202474898U (en) * | 2011-12-23 | 2012-10-03 | 国彪电源集团有限公司 | Harmonic-recycling-type online uninterrupted power source system |
| CN103364618A (en) * | 2013-07-26 | 2013-10-23 | 武汉大学 | Measuring method for harmonic voltage on direct current side of high-voltage direct current power transmission system |
| CN104316796A (en) * | 2014-10-24 | 2015-01-28 | 国家电网公司 | High power harmonic power supply characteristic testing system and method |
| CN104345234A (en) * | 2014-10-24 | 2015-02-11 | 国网四川省电力公司电力科学研究院 | Harmonic power supply feature test system and method |
| US20160161543A1 (en) * | 2014-12-09 | 2016-06-09 | Rosemount Inc. | Partial discharge detection system |
| CN104852388A (en) * | 2015-05-15 | 2015-08-19 | 国电南京自动化股份有限公司 | Chain SVG device with active filter function |
| CN205753409U (en) * | 2015-12-30 | 2016-11-30 | 江苏省电力公司常州供电公司 | A kind of intermediate frequency furnace harmonic filter system of low cost |
| CN205680766U (en) * | 2016-06-22 | 2016-11-09 | 深圳市创屹集成器件有限公司 | A kind of wave filter based on LTCC |
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