CN110361576A - A kind of generator unit stator winding polarization depolarising test macro and test method - Google Patents
A kind of generator unit stator winding polarization depolarising test macro and test method Download PDFInfo
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- CN110361576A CN110361576A CN201910577467.5A CN201910577467A CN110361576A CN 110361576 A CN110361576 A CN 110361576A CN 201910577467 A CN201910577467 A CN 201910577467A CN 110361576 A CN110361576 A CN 110361576A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R13/00—Arrangements for displaying electric variables or waveforms
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/0092—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring current only
-
- 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
-
- 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
- G01R31/34—Testing dynamo-electric machines
- G01R31/343—Testing dynamo-electric machines in operation
-
- 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
- G01R31/34—Testing dynamo-electric machines
- G01R31/346—Testing of armature or field windings
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Tests Of Circuit Breakers, Generators, And Electric Motors (AREA)
- Control Of Eletrric Generators (AREA)
Abstract
It polarizes the invention discloses a kind of generator unit stator winding and depolarizes test macro and test method, which is handled the polarization depolarization current signal for receiving the collected polarization depolarization current signal of pico-ampere table institute；System includes operation interface and display interface；Operation interface includes that data save setup module and test parameters setup module；Data save setting for by acquisition time and corresponding current Value Data, giving document title after on-test by user and automatically creating document and be stored under specified folder；The test parameters setup module is used to be supplied to selection or setting that user carries out test parameters；Display interface includes that time showing, real-time current the depolarising characteristic curve that shows and polarize are shown.This system is accurately issued by controlling test parameter, is realized the complete preservation of automatic control, data processing and the test data, curve of polarization depolarisation test, is saved test period, improve the working efficiency of testing crew.
Description
Technical field
The present invention relates to polarization to depolarize testing field, and in particular to a kind of generator unit stator winding polarization depolarising test
System and test method.
Background technique
Depolarization current method (PDC) is polarized as a kind of lossless insulation diagnosis technology based on time domain dielectric response theory,
Have the characteristics that carry abundant information, easy to operate.During generator unit stator winding polarization depolarising field test, hand is needed
Dynamic operation 6487 type pico-ampere table of KEITHLEY carries out generator unit stator winding polarization depolarisation test, and the degree of automation is lower.?
During actual measurement is applied, need to carry out 6487 type pico-ampere table current measurement data of KEITHLEY by mobile phone photograph
In real time acquisition, by way of mobile phone photograph, both can not accurately control acquisition time interval, also brought not to real work
Just.In addition independent repairing experiment data are needed after on-the-spot test and draw polarization depolarising characteristic curve, it also can be to overall work
Progress has some impact on.
Summary of the invention
The technical issues of in order to solve inconvenient, efficiency present in existing polarization depolarization current method, the present invention are real
It applies example and a kind of generator unit stator winding polarization depolarising test macro and test method is provided.
To achieve the above object, the technical scheme is that
In a first aspect, polarizing the embodiment of the invention provides a kind of generator unit stator winding depolarizes test macro, this is
System for receiving the collected polarization depolarization current signal of pico-ampere table institute, and to the polarization depolarization current signal at
Reason；The system comprises operation interfaces and display interface；Wherein,
The operation interface includes that data save setup module and test parameters setup module；The data save setting and use
In after on-test by acquisition time and corresponding current Value Data, document title is given by user and automatically creates document and saves
Under specified folder；The test parameters setup module is used to be supplied to selection or setting that user carries out test parameters；
The display interface includes that time showing, real-time current the depolarising characteristic curve that shows and polarize are shown.
Further, the system also includes pico-ampere table zero correction units, for carrying out test advance to pico-ampere table
Row zero correction.
Further, confirmation unit is reminded before pressurizeing the system also includes test, for reminding for being confirmed whether out
Begin to apply DC voltage, to activate pico-ampere table voltage source.
Further, the system also includes experiment control unit is stopped, for being abnormal or needing in test data
When stopping test by force, stop test experiments.
Specifically, the test parameters includes voltmeter range, pressure voltage value, ammeter automatic range selecting circuit, electric current
Table hand range, current-clamp, acquisition time interval, voltage source shut-in time and testing current time.
Further, the operation interface further includes communication interface selecting module, for selecting pico-ampere table and this system logical
Interrogate transmission mode.
Specifically, after pico-ampere table voltage source is activated, time counter starts timing, pico-ampere table according to set time between
Every measurement polarization current data, when timing number is greater than I section of current measurement time setting value, voltage source is closed, the measurement of pico-ampere table
Depolarization current data, when timing number is greater than the sum of I, II section of current measurement time setting value, pico-ampere table stops measurement, test
Terminate；Time and real-time current value will draw polarization depolarising characteristic curve in display interface Dynamically Announce to realize.
Second aspect polarizes the embodiment of the invention provides a kind of generator unit stator winding and depolarizes test method, comprising:
Start to test, saves setup module by data data file storing path is arranged；
Zero correction is carried out to pico-ampere table；
Obtain test parameters；
It is confirmed whether to start to apply voltage, selects "No", then test pause, select "Yes", then activate pico-ampere table voltage source,
Into next step；
Time counter starts counting, and pico-ampere table measurement starts；
It reads and stores polarization current measurement data measured by pico-ampere table；
It shows real-time current value, and draws depolarising characteristic curve according to time and real-time current value, and on display circle
Face Dynamically Announce；
Judge whether timing number is greater than I section of current measurement time setting value；If "No" maintains the original state；If "Yes",
Pico-ampere table voltage source is closed, into next step；
It reads and stores polarization current measurement data measured by pico-ampere table；
It shows real-time current value, and draws polarization depolarising characteristic curve according to time and real-time current value, and aobvious
Show interface Dynamically Announce；
Judge whether timing number is greater than the sum of I, II section of current measurement time setting value, if "No", maintains the original state；If
"Yes", pico-ampere table then stop measuring, off-test.
Compared with prior art, the present invention the beneficial effect is that:
Generator unit stator winding polarization depolarising test macro provided in this embodiment passes through the accurate of controlling test parameter
It issues, realizes the complete preservation of automatic control, data processing and the test data, curve of polarization depolarisation test, save
Test period, improves the working efficiency of testing crew.
Detailed description of the invention
Fig. 1 is the user interface signal of generator unit stator winding provided in an embodiment of the present invention polarization depolarising test macro
Figure；
Fig. 2 is the working principle block diagram that data save setup module；
Fig. 3 is pico-ampere table zero correction unit and the working principle diagram that test parameters obtains；
Fig. 4 is the working principle diagram of prompting confirmation unit before test pressurization；
Fig. 5 is that the timing of pico-ampere table voltage source is closed, pico-ampere table current measurement function is realized and characteristic curve drawing principle frame
Figure；
Fig. 6 is the flow chart of generator unit stator winding provided in an embodiment of the present invention polarization depolarising test method；
The application effect signal of Fig. 7 generator unit stator winding polarization depolarising test macro provided in an embodiment of the present invention
Figure.
Specific embodiment
The contents of the present invention are described in further details with reference to the accompanying drawings and detailed description.
Embodiment:
In the present embodiment, pico-ampere table is 6487 type pico-ampere table of KEITHLEY comprising the DC voltage an of ± 500V
Source, while ohm measurement etc. with current measurement and convertible polarity of voltage mode, micro current range be 2nA~
20mA, measuring accuracy can reach 1pA, can be programmed by interface bus RS232 and IEEE488.Generator provided in this embodiment
Stator winding polarization depolarising test macro mainly pass through 6487 type pico-ampere table of KEITHLEY to polarization depolarization current signal into
Row acquisition, acquisition signal send data collecting card to after pico-ampere table inter-process, are then transmitted to what this system was installed again
In computer, that is to say, that the collected test parameters of pico-ampere table will be transferred to this system in real time, be carried out by this system
Reason；Wherein, data collecting card uses the GPIB-USB-HS+ of NI company, product number 783368-01 to use standard IEEE 488
Handshake Protocol, transmission rate reach 1.8MB/s (IEEE 488.1) or 7.2MB/s (HS488), have small in size, light-weight spy
Point.It is Intel (R) Core (TM) i3-6006U, dominant frequency 2.00GHz, memory that PC computer, which selects ThinkPad X270, CPU,
8.00GB, operating system are 7 professional version of Windows.
Refering to fig. 1 shown in -6, generator unit stator winding polarization depolarising test macro provided in this embodiment mainly includes
Operation interface 1 and display interface 2.
Wherein, which includes that data save setup module 11 and test parameters setup module 12；As shown in Fig. 2,
The setting that the data save setup module 11 is to choose certain polarization depolarization current measured value in reasonable time
As test data sheet, first definition document title and data savings path can be set before test, system can give document according to user
Title automatically creates Excel document in designated position, and polarization depolarization current value will be recorded successively in chronological order；And the test
Parameter setting module 12 then for measuring voltmeter range, pressure voltage value, ammeter automatic range selecting circuit, ammeter manually
Journey, current-clamp, acquisition time interval, voltage source shut-in time and testing current time are supplied to user and select or set
It is fixed, that is to say, that ammeter range, current-clamp, voltmeter range before test, apply the setting of the test parameters such as voltage value with
And the timing controlled of pico-ampere table voltage source can be unified in client end interface completion, manual operating instrument is not necessarily to, in order to test
The operation of personnel
And the display interface 2 is then shown including the testing time, real-time current shows and polarizes, and depolarising characteristic curve is aobvious
Show.That is, a whole display interface can concisely, intuitive way understand test data variation.
It follows that generator unit stator winding polarization depolarising test macro provided in this embodiment by obtaining skin in real time
Pacify the test parameters of table, with accurately issuing for control parameter, realize the polarization automatic control of depolarisation test, data processing with
And the complete preservation of test data, curve, test period is saved, the working efficiency of testing crew is improved.
Preferably, this further includes pico-ampere table zero to one kind as above-mentioned generator unit stator winding polarization depolarising test macro
Point correction unit, for carrying out zero correction before testing to pico-ampere table, before the test, to prevent measurement initial value from deviateing zero
Point, it is ensured that 6487 type pico-ampere table measurement data accuracy of KEITHLEY
Preferably, which further includes examination to another kind as above-mentioned generator unit stator winding polarization depolarising test macro
Confirmation unit is reminded before testing pressurization, for reminding for being confirmed whether to start to apply DC voltage, if start to carry out to activate
Pico-ampere table voltage source, to remind whether user tests.That is, before on-test pressurization, in the display interface of system
In will pop up " start apply voltage? " confirmation interface, remind user will start apply DC voltage.Click " No " test stream
Journey stops, and clicks " Yes ", and experiment process continues, specific as shown in Figure 4.
Another as above-mentioned generator unit stator winding polarization depolarising test macro is preferred, which further includes stopping
Only experiment control unit 3, for stopping test experiments when test data is abnormal or needs to stop test by force.
In addition, above-mentioned operation interface further includes communication interface selecting module, for selecting pico-ampere table and this system to communicate
Transmission mode transmits transmission requirement to meet different data.
Specifically, after pico-ampere table voltage source is activated, time counter starts timing, pico-ampere table according to set time between
Every measurement polarization current data, when timing number is greater than I section of current measurement time setting value, voltage source is closed, the measurement of pico-ampere table
Depolarization current data, when timing number is greater than the sum of I, II section of current measurement time setting value, pico-ampere table stops measurement, test
Terminate；Time and real-time current value will draw polarization depolarising characteristic curve in display interface Dynamically Announce to realize.Also
It is to say, by real-time acquisition and pole that the timing closing of pico-ampere table voltage source, testing current data may be implemented with this system
Change and depolarizes characteristic drafting function.
Correspondingly, the present embodiment additionally provides a kind of generator unit stator winding polarization depolarising test method, such as Fig. 6 institute
Show, this method comprises:
Start to test, saves setup module by data data file storing path is arranged；
Zero correction is carried out to pico-ampere table；
Obtain test parameters；
It is confirmed whether to start to apply voltage, selects "No", then test pause, select "Yes", then activate pico-ampere table voltage source,
Into next step；
Time counter starts counting, and pico-ampere table measurement starts；
It reads and stores polarization current measurement data measured by pico-ampere table；
It shows real-time current value, and draws polarization characteristic curve according to time and real-time current value, and in display interface
Dynamically Announce；
Judge whether timing number is greater than I section of current measurement time setting value；If "No" maintains the original state；If "Yes",
Pico-ampere table voltage source is closed, into next step；
It reads and stores depolarization current measurement data measured by pico-ampere table；
It shows real-time current value, and draws depolarising characteristic curve according to time and real-time current value, and on display circle
Face Dynamically Announce；
Judge whether timing number is greater than the sum of I, II section of current measurement time setting value, if "No", maintains the original state；If
"Yes", pico-ampere table then stop measuring, off-test.
Before test, to prevent measurement initial value from deviateing zero point, it is ensured that 6487 type pico-ampere table measurement data of KEITHLEY is accurate
Property, it needs to carry out zeroing calibration to instrument.Program control system selects pico-ampere table minimum range to execute automatically before current measurement
Zero correction.Program command and meaning are as follows:
* RST // by 6487 types return GPIB default value
SYST:ZCH ON // activation zero check
RANG 2e-9 // selection 2nA range
INIT // triggering reading is used as zero correction
SYST:ZCOR:ACQ // by selection the last one reading be used as zero-point correction value
SYST:ZCOR ON // carry out zero correction
SYST:ZCH OFF；// stop zeroing.
Below with reference to an application implementation, this system to be further detailed:
The polarization depolarising test of certain pump storage plant generator machine stator winding is specific steps are as follows: in system operatio
Interface sets test parameters, setting storing path " C: Users Administrator Desktop certain power plant #1 generator
Stator winding polarization depolarisation test .xls ", selects VISA resource name " GPIB0::22::INSTR ", voltmeter range is arranged
" 500V ", apply voltage value " 200V ", current-clamp " 2.5e-5 ", acquisition time interval " 0.5s ", I section of current measurement time
" 20s ", II section of current measurement time " 20s ", ammeter automatic range " ON " click menu and run button, polarization that you can get it
Characteristic curve is depolarized, as shown in Figure 7.
To sum up, in generator unit stator winding polarization depolarisation test, this test macro advantage is as follows:
(1) zero correction can be carried out automatically before the test of 6487 type pico-ampere table of KEITHLEY, be not necessarily to manual operating instrument.
(2) ammeter range, current-clamp, voltmeter range before testing, apply the setting of the test parameters such as voltage value with
And the timing controlled of pico-ampere table voltage source can be unified in client end interface completion, be not necessarily to manual operating instrument.
(3) test data is obtained compared to original shooting style, current acquisition time interval is arranged by this system, it can
More accurate control current measurement time.
(4) acquisition of data and the processing of data use parallel organization, i.e., in the same of operation polarization depolarization current test
When real time data can be analyzed and processed.
(5) data automatically save, while providing real time monitoring and graphic software platform, on-the-spot test to polarization depolarisation test
Afterwards without in addition independent repairing experiment data and drafting polarization depolarising characteristic curve.
This test macro by controlling test parameter accurately issue, realize polarization depolarisation test automatic control,
Data processing and the complete preservation of test data, curve, save test period, improve the working efficiency of testing crew.
Polarization depolarization current monitoring system has been applied to on-the-spot test at present, and system run all right, output result is reliable, can be hair
Motor Condition assessment of insulation provides effectively reference.
Simply to illustrate that technical concepts and features of the invention, its purpose is allows in the art above-described embodiment
Those of ordinary skill cans understand the content of the present invention and implement it accordingly, and it is not intended to limit the scope of the present invention.It is all
It is the equivalent changes or modifications that the essence of content according to the present invention is made, should be covered by the scope of protection of the present invention.
Claims (10)
1. a kind of generator unit stator winding polarization depolarising test macro, which is characterized in that the system is for receiving pico-ampere table
The collected polarization depolarization current signal of institute, and the polarization depolarization current signal is handled；The system comprises behaviour
Make interface and display interface；Wherein,
The operation interface includes that data save setup module and test parameters setup module；The data save setting for
By acquisition time and corresponding current Value Data after on-test, document title is given by user and automatically creates document and is stored in finger
Determine under file；The test parameters setup module is used to be supplied to selection or setting that user carries out test parameters；
The display interface includes that time showing, real-time current the depolarising characteristic curve that shows and polarize are shown.
2. generator unit stator winding polarization depolarising test macro as described in claim 1, which is characterized in that the system is also
Including pico-ampere table zero correction unit, for carrying out zero correction before testing to pico-ampere table.
3. generator unit stator winding polarization depolarising test macro as claimed in claim 1 or 2, which is characterized in that the system
System further includes prompting confirmation unit before test pressurization, for reminding for being confirmed whether to start to apply DC voltage, to activate skin
Pacify table voltage source.
4. generator unit stator winding polarization depolarising test macro as claimed in claim 3, which is characterized in that the system is also
Including stopping experiment control unit, for it is real to stop test when test data is abnormal or needs to stop by force test
It tests.
5. generator unit stator winding polarization depolarising test macro as described in claim 1, which is characterized in that the test ginseng
When number includes voltmeter range, pressure voltage value, ammeter automatic range selecting circuit, ammeter hand range, current-clamp, acquisition
Between interval, voltage source shut-in time and testing current time.
6. generator unit stator winding polarization depolarising test macro as described in claim 1, which is characterized in that operation circle
Face further includes communication interface selecting module, for selecting pico-ampere table and this system communication transfer mode.
7. generator unit stator winding polarization depolarising test macro as claimed in claim 3, which is characterized in that when pico-ampere table electricity
After potential source is activated, time counter starts timing, and pico-ampere table interval measurement polarization current data according to set time work as timing
When number is greater than I section of current measurement time setting value, voltage source is closed, and pico-ampere table measures depolarization current data, when timing number is big
When the sum of I, II section of current measurement time setting value, pico-ampere table stops measurement, off-test；Time and real-time current value will
In display interface Dynamically Announce, polarization depolarising characteristic curve is drawn to realize.
8. a kind of generator unit stator winding polarization depolarising test method characterized by comprising
Start to test, saves setup module by data data file storing path is arranged；
Zero correction is carried out to pico-ampere table；
Obtain test parameters；
It is confirmed whether to start to apply voltage, selects "No", then test pause, select "Yes", then activate pico-ampere table voltage source, enter
Next step；
Time counter starts counting, and pico-ampere table measurement starts；
It reads and stores polarization current measurement data measured by pico-ampere table；
It shows real-time current value, and draws depolarising characteristic curve according to time and real-time current value, and is dynamic in display interface
State is shown；
Judge whether timing number is greater than I section of current measurement time setting value；If "No" maintains the original state；If "Yes" is closed
Pico-ampere table voltage source, into next step；
It reads and stores polarization current measurement data measured by pico-ampere table；
It shows real-time current value, and draws polarization depolarising characteristic curve according to time and real-time current value, and on display circle
Face Dynamically Announce；
Judge whether timing number is greater than the sum of I, II section of current measurement time setting value, if "No", maintains the original state；If
"Yes", pico-ampere table then stop measuring, off-test.
9. generator unit stator winding polarization depolarising test method as claimed in claim 8, which is characterized in that the test ginseng
When number includes voltmeter range, pressure voltage value, ammeter automatic range selecting circuit, ammeter hand range, current-clamp, acquisition
Between interval, voltage source shut-in time and testing current time.
10. generator unit stator winding polarization depolarising test method as claimed in claim 8, which is characterized in that described to skin
Peace table carries out zero correction
Pico-ampere table to be corrected is returned into GPIB default value；
Activate zero check；
Select 2nA range；
Triggering reading is used as zero correction；
It regard the last one reading of selection as zero-point correction value；
Carry out zero correction；
Stop zeroing.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910577467.5A CN110361576A (en) | 2019-06-28 | 2019-06-28 | A kind of generator unit stator winding polarization depolarising test macro and test method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910577467.5A CN110361576A (en) | 2019-06-28 | 2019-06-28 | A kind of generator unit stator winding polarization depolarising test macro and test method |
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| CN110361576A true CN110361576A (en) | 2019-10-22 |
Family
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112040502A (en) * | 2020-08-31 | 2020-12-04 | 广东电网有限责任公司广州供电局 | PDC test data transmission method and device |
| CN116298734A (en) * | 2023-05-05 | 2023-06-23 | 南方电网调峰调频发电有限公司检修试验分公司 | Method, device, equipment and medium for testing insulation performance of engine stator |
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| CN106908654A (en) * | 2015-12-23 | 2017-06-30 | 华中科技大学 | A kind of polarization-depolarization current measuring system |
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| CN116298734B (en) * | 2023-05-05 | 2023-10-27 | 南方电网调峰调频发电有限公司检修试验分公司 | Method, device, equipment and medium for testing insulation performance of engine stator |
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Application publication date: 20191022 |
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