CN206132860U - Internal water cooling generator stator winding dielectric loss measuring device - Google Patents
Internal water cooling generator stator winding dielectric loss measuring device Download PDFInfo
- Publication number
- CN206132860U CN206132860U CN201621100442.4U CN201621100442U CN206132860U CN 206132860 U CN206132860 U CN 206132860U CN 201621100442 U CN201621100442 U CN 201621100442U CN 206132860 U CN206132860 U CN 206132860U
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- China
- Prior art keywords
- dielectric loss
- stator winding
- resistance
- water
- generator stator
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Abstract
The utility model belongs to the technical field of dielectric loss measures, a internal water cooling generator stator winding dielectric loss measuring device is disclosed, the device is including high -pressure series resonance unit, dielectric loss measuring unit, high -pressure standard capacitor unit, dielectric loss the control unit, dielectric loss measuring unit's high pressure input and the anodal of high -pressure series resonance unit are connected, and dielectric loss measuring unit's standard capacitor end and the anodal of high -pressure standard capacitor unit are connected, and dielectric loss measuring unit's examination article output and internal water cooling measuring unit 0 winding examination article input are connected, two current measurement end of dielectric loss the control unit connect at ground resistance's both ends dielectric loss measuring unit and dielectric loss the control unit wireless connection respectively, the negative pole of high pressure series resonance unit, the negative pole of high -pressure standard capacitor unit are connected with internal water cooling generator stator winding examination article earthing terminal respectively, and the device can carry out the precision measurement to the dielectric loss of internal water cooling generator stator winding.
Description
Technical field
The utility model belongs to dielectric loss measurement technical field, more particularly to a kind of water-cooled generator stator winding is situated between
Matter loss measurement device, can be used to carry out accurate measurement to the dielectric loss of water-cooled generator stator winding.
Background technology
At present the generating set of 300MW, 600MW, 1000MW becomes main force's unit of power system, its stator winding it is cold
But mode is all to adopt water cooling mode.By charge for remittance ring with connecting greatly, charge for remittance ring is divided into ground connection and over the ground to stator cooling water
Two kinds of forms of insulation.Because stator cooling water has certain electrical conductivity, generator unit stator is electric by some plus after voltage
Stream enters the earth by stator cooling water through charge for remittance circulation.
When carrying out generator unit stator pressure test, what test apparatus was measured is the total current from high pressure side inflow, is converged
The earth current of water ring produces certain impact to measurement result.
During generator unit stator applied voltage directly grounded to charge for remittance ring, for the problems referred to above, at present using the following two kinds
Mode is solved：It is a kind of be by the way of water is dried up, but which has time-consuming and water cannot not blow dryly and can cause
The problems such as insulating water inlet pipe flashover；Another way be reduce stator cooling water electrical conductivity method, but which exist it is right
Water quality requirement is high, the problems such as water quality affects big to measurement result.
During to the generator unit stator applied voltage of generator charge for remittance ring insulation against ground, can be by measurement charge for remittance ring ground connection electricity
The method of stream, eliminates impact of the charge for remittance ring earth current to dielectric loss measurement result.Reversal connection is carried out to generator unit stator winding
During line measurement dielectric loss, because dielectric loss instrument carries out test product total current measurement in hot end, so cannot be by test product total current
Access after instrument internal is synthesized with charge for remittance ring earth current and measure.With regard to the solution of current technology, mainly by drop
The method of low stator cooling water electrical conductivity, but this method equally exists high to water quality requirement, and water quality affects big to measurement result
The problems such as.
Utility model content
For the problems referred to above, the purpose of this utility model is to provide a kind of water-cooled generator stator winding dielectric loss
Measurement apparatus, can carry out accurate measurement to the dielectric loss of water-cooled generator stator winding.
To reach above-mentioned purpose, embodiment of the present utility model is adopted the following technical scheme that and is achieved.
Technical scheme one：
A kind of water-cooled generator stator winding dielectric loss measuring set, the water-cooled generator stator winding it is exhausted
Edge equivalent circuit is included：The capacitance-resistance series arm being composed in series by the first electric capacity and first resistor, the electricity being made up of the second electric capacity
Hold branch road, the resistance branch that is made up of second resistance and charge for remittance ring branch road, one end of first electric capacity and first resistor
One end connects；The other end of first electric capacity one end respectively with second electric capacity, one end of the second resistance are connected,
The other end of the first resistor other end respectively with second electric capacity, the other end of the second resistance are electrically connected；
The charge for remittance ring branch road is included：The capacitance-resistance parallel branch that is made up of 3rd resistor and the 3rd electric capacity and over the ground electricity
Resistance；One end of the capacitance-resistance parallel branch is connected with one end of the resistance to earth, the other end of the capacitance-resistance parallel branch with
One end connection of first electric capacity, and remember that its tie point is water-cooled generator stator winding test product input；It is described over the ground
The other end of resistance is connected with the other end of the first resistor, and remembers that its tie point is water-cooled generator stator winding test product
Earth terminal, and the water-cooled generator stator winding test product earth terminal ground connection is set；
The water-cooled generator stator winding dielectric loss measuring set is provided with high-pressure series resonant element, medium and damages
Consumption measuring unit, high voltage standard capacitor cell and dielectric loss control unit；
The high voltage input terminal of dielectric loss measurement unit is connected with the positive pole of the high-pressure series resonant element, dielectric loss
The standard capacitance end of measuring unit is connected with the positive pole of the high voltage standard capacitor cell, and the test product of dielectric loss measurement unit is defeated
Go out end to be connected with the water-cooled generator stator winding test product input；
Two current measurement ends of dielectric loss control unit are connected to the two ends of the resistance to earth, the medium
Loss measurement unit is wirelessly connected with the dielectric loss control unit；
The negative pole of the high-pressure series resonant element, the high voltage standard capacitor cell negative pole respectively with the internal water cooling
Generator unit stator winding test product earth terminal connects.
Technical scheme two：
A kind of water-cooled generator stator winding dielectric loss measurement method, the measuring method is applied to such as technical scheme
Measurement apparatus described in one, methods described comprises the steps：
Step 1, high-pressure series resonant element provides working power for dielectric loss measurement unit；High voltage standard electric capacity is Jie
Matter loss measurement unit provides high voltage standard electric capacity；
Step 2, dielectric loss measurement unit is according to the high voltage standard electric capacity, the stator winding examination of measurement water-cooled generator
First current in resistance property and the first capacity current of product input；And first current in resistance property and the first capacity current are passed through into nothing
Line mode is sent to dielectric loss control unit；
Step 3, charge for remittance ring branch road is over the ground in dielectric loss control unit measurement water-cooled generator stator winding
Electric current, remembers the current in resistance property over the ground that this pair of earth-current is charge for remittance ring branch road；
Step 4, the dielectric loss control unit is according to first current in resistance property, the first capacity current and charge for remittance ring
The current in resistance property over the ground of branch road, calculates the dielectric loss of water-cooled generator stator winding test product.
The utility model has compared with prior art advantages below：(1) dielectric loss is measured to generator unit stator winding
When, impact of the charge for remittance ring earth current to measurement result is removed, while determining cold water change of water quality without considering when making test, survey
Amount result is more accurate；(2) by charge for remittance ring earth current according to current in resistance property process, it is not necessary to separately take voltage signal, can simplify
Instrument configuration.
Description of the drawings
In order to be illustrated more clearly that the utility model embodiment or technical scheme of the prior art, below will be to embodiment
Or the accompanying drawing to be used needed for description of the prior art is briefly described, it should be apparent that, drawings in the following description are only
It is some embodiments of the present utility model, for those of ordinary skill in the art, in the premise for not paying creative work
Under, can be with according to these other accompanying drawings of accompanying drawings acquisition.
The structure of the water-cooled generator stator winding dielectric loss measuring set that Fig. 1 is provided for the utility model embodiment
Schematic diagram；
The flow process of the water-cooled generator stator winding dielectric loss measurement method that Fig. 2 is provided for the utility model embodiment
Schematic diagram.
Specific embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is carried out
Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of the utility model, rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made
The every other embodiment for being obtained, belongs to the scope of the utility model protection.
With reference to Fig. 1, for a kind of water-cooled generator stator winding dielectric loss measurement that the utility model embodiment is provided
The structural representation of device, the insulation equivalent circuit of the water-cooled generator stator winding is included：By the first electric capacity and first
The capacitance-resistance series arm of resistant series composition, the capacitive branch being made up of the second electric capacity, the resistance branch being made up of second resistance
And charge for remittance ring branch road, one end of first electric capacity and one end connection of first resistor；The other end of first electric capacity point
One end of one end, the second resistance not with second electric capacity is connected, the other end of the first resistor respectively with it is described
The other end electrical connection of the other end of the second electric capacity, the second resistance；
The charge for remittance ring branch road is included：The capacitance-resistance parallel branch that is made up of 3rd resistor and the 3rd electric capacity and over the ground electricity
Resistance；One end of the capacitance-resistance parallel branch is connected with one end of the resistance to earth, the other end of the capacitance-resistance parallel branch with
One end connection of first electric capacity, and remember that its tie point is water-cooled generator stator winding test product input；It is described over the ground
The other end of resistance is connected with the other end of the first resistor, and remembers that its tie point is water-cooled generator stator winding test product
Earth terminal, and the water-cooled generator stator winding test product earth terminal ground connection is set；
The water-cooled generator stator winding dielectric loss measuring set is provided with high-pressure series resonant element, medium and damages
Consumption measuring unit, high voltage standard capacitor cell and dielectric loss control unit；
The high voltage input terminal of dielectric loss measurement unit is connected with the positive pole of the high-pressure series resonant element, dielectric loss
The standard capacitance end of measuring unit is connected with the positive pole of the high voltage standard capacitor cell, and the test product of dielectric loss measurement unit is defeated
Go out end to be connected with the water-cooled generator stator winding test product input；
Two current measurement ends of dielectric loss control unit are connected to the two ends of the resistance to earth, the medium
Loss measurement unit is wirelessly connected with the dielectric loss control unit；
The negative pole of the high-pressure series resonant element, the high voltage standard capacitor cell negative pole respectively with the internal water cooling
Generator unit stator winding test product earth terminal connects.
Specifically, the high-pressure series resonant element provides 0 kilovolt to 60 kilovolts of additional power source.
Again specific, the capacitance of the high voltage standard electric capacity is 100pF, and its insulation against ground is 60 kilovolts.
With reference to Fig. 2, for a kind of water-cooled generator stator winding dielectric loss measurement that the utility model embodiment is provided
Method, the measuring method is applied to the measurement apparatus described in above-described embodiment, and methods described comprises the steps：
Step 1, high-pressure series resonant element provides working power for dielectric loss measurement unit；High voltage standard electric capacity is Jie
Matter loss measurement unit provides high voltage standard electric capacity；
Step 2, dielectric loss measurement unit is according to the high voltage standard electric capacity, the stator winding examination of measurement water-cooled generator
First current in resistance property and the first capacity current of product input；And first current in resistance property and the first capacity current are passed through into nothing
Line mode is sent to dielectric loss control unit；
Step 3, charge for remittance ring branch road is over the ground in dielectric loss control unit measurement water-cooled generator stator winding
Electric current, remembers the current in resistance property over the ground that this pair of earth-current is charge for remittance ring branch road；
Step 4, the dielectric loss control unit is according to first current in resistance property, the first capacity current and charge for remittance ring
The current in resistance property over the ground of branch road, calculates the dielectric loss of water-cooled generator stator winding test product.
Further, step 4 is specifically included：
First current in resistance property deducts the current in resistance property over the ground of charge for remittance ring branch road and obtains current differential；
The dielectric loss of water-cooled generator stator winding test product is equal to the ratio of the current differential and the first capacity current
Value.
Exemplary, in certain 1000MW generator unit stator windings dielectric loss measurement experiment, according to above-described embodiment
Described dielectric loss measuring set carries out wiring, wherein, high-pressure series resonant element is provided after 10 kilovolts of alternating voltages, is passed through
Dielectric loss measurement unit obtains the exchange total current of water-cooled generator stator winding test product input generation and is divided into resistive electricity
Flow component (i.e. the first current in resistance property)With capacitive current component (i.e. the first capacity current)
Existing method calculates generator unit stator winding dielectric loss measurement value according to resistive current component and capacity current point
Measure ratio between two to calculate i.e.Dielectric loss measurement value is obtained for 2.86%.
In technical solutions of the utility model, by measuring charge for remittance ring earth currentAnd in actual work
In journey experiment, it may be determined that charge for remittance ring earth currentIn, current in resistance property compositionCapacitive
Current componentIt can be seen that in charge for remittance ring earth current, capacity current composition is much smaller than current in resistance property composition, can
To ignore.
Therefore, technical solutions of the utility model consider charge for remittance ring earth current after, dielectric loss measurement value according toIt is calculated as 2%, it can be seen that, the dielectric loss measurement value calculated with existing method is carried out for 2.86%
Relatively, charge for remittance ring earth current can cause 43% measure error.And pass through the method that the utility model embodiment provides and exist
When measuring dielectric loss to generator unit stator winding, impact of the charge for remittance ring earth current to measurement result can be removed, make test
While Shi Buyong considers stator cold water change of water quality, measurement result is more accurate；By charge for remittance ring earth current according to resistive electricity
Stream process, it is not necessary to separately take voltage signal, can simplify instrument configuration.
The above, specific embodiment only of the present utility model, but protection domain of the present utility model do not limit to
In this, any those familiar with the art can readily occur in change in the technical scope that the utility model is disclosed
Or replace, all should cover within protection domain of the present utility model.Therefore, protection domain of the present utility model should be with the power
The protection domain that profit is required is defined.
Claims (3)
1. a kind of water-cooled generator stator winding dielectric loss measuring set, it is characterised in that the water-cooled generator is determined
The insulation equivalent circuit of sub- winding is included：It is the capacitance-resistance series arm that is composed in series by the first electric capacity and first resistor, electric by second
The capacitive branch for holding composition, the resistance branch that is made up of second resistance and charge for remittance ring branch road, one end of first electric capacity and
One end connection of first resistor；The other end of first electric capacity one end, the second resistance respectively with second electric capacity
One end connection, the other end of the first resistor other end respectively with second electric capacity, the second resistance it is another
End electrical connection；
The charge for remittance ring branch road is included：The capacitance-resistance parallel branch being made up of 3rd resistor and the 3rd electric capacity and resistance to earth；Institute
The one end for stating capacitance-resistance parallel branch is connected with one end of the resistance to earth, the other end of the capacitance-resistance parallel branch and described
One end connection of one electric capacity, and remember that its tie point is water-cooled generator stator winding test product input；The resistance to earth
The other end is connected with the other end of the first resistor, and remembers that its tie point is water-cooled generator stator winding test product ground connection
End, and the water-cooled generator stator winding test product earth terminal ground connection is set；
The water-cooled generator stator winding dielectric loss measuring set is provided with high-pressure series resonant element, dielectric loss and surveys
Amount unit, high voltage standard capacitor cell and dielectric loss control unit；
The high voltage input terminal of dielectric loss measurement unit is connected with the positive pole of the high-pressure series resonant element, dielectric loss measurement
The standard capacitance end of unit is connected with the positive pole of the high voltage standard capacitor cell, the test product output end of dielectric loss measurement unit
It is connected with the water-cooled generator stator winding test product input；
Two current measurement ends of dielectric loss control unit are connected to the two ends of the resistance to earth, the dielectric loss
Measuring unit is wirelessly connected with the dielectric loss control unit；
The negative pole of the high-pressure series resonant element, the negative pole of the high voltage standard capacitor cell generate electricity respectively with the internal water cooling
Machine stator winding test product earth terminal connects.
2. a kind of water-cooled generator stator winding dielectric loss measuring set according to claim 1, it is characterised in that
The high-pressure series resonant element provides 0 kilovolt to 60 kilovolts of additional power source.
3. a kind of water-cooled generator stator winding dielectric loss measuring set according to claim 1, it is characterised in that
The capacitance of the high voltage standard electric capacity is 100pF, and its insulation against ground is 60 kilovolts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621100442.4U CN206132860U (en) | 2016-09-30 | 2016-09-30 | Internal water cooling generator stator winding dielectric loss measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621100442.4U CN206132860U (en) | 2016-09-30 | 2016-09-30 | Internal water cooling generator stator winding dielectric loss measuring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206132860U true CN206132860U (en) | 2017-04-26 |
Family
ID=58572354
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621100442.4U Withdrawn - After Issue CN206132860U (en) | 2016-09-30 | 2016-09-30 | Internal water cooling generator stator winding dielectric loss measuring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206132860U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106226604A (en) * | 2016-09-30 | 2016-12-14 | 中国大唐集团科学技术研究院有限公司西北分公司 | Water-cooled generator stator winding dielectric loss measuring set and method |
-
2016
- 2016-09-30 CN CN201621100442.4U patent/CN206132860U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106226604A (en) * | 2016-09-30 | 2016-12-14 | 中国大唐集团科学技术研究院有限公司西北分公司 | Water-cooled generator stator winding dielectric loss measuring set and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20170426 Effective date of abandoning: 20180814 |