CN206311733U - A kind of electricity generator stator coil Condition assessment of insulation device - Google Patents
A kind of electricity generator stator coil Condition assessment of insulation device Download PDFInfo
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- CN206311733U CN206311733U CN201621344815.2U CN201621344815U CN206311733U CN 206311733 U CN206311733 U CN 206311733U CN 201621344815 U CN201621344815 U CN 201621344815U CN 206311733 U CN206311733 U CN 206311733U
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Abstract
The utility model is related to a kind of electricity generator stator coil Condition assessment of insulation device, it is used to the state of insulation by assessing testing generator stator coil using polarization depolarization current method, the device includes data acquisition controller, protective resistance and the high-voltage DC power supply being connected with data acquisition controller respectively, selecting switch, ammeter and contrast display module, described high-voltage DC power supply positive pole, the b contacts of selecting switch, the a contacts of selecting switch, testing generator stator coil, ammeter and high-voltage DC power supply negative pole are sequentially connected composition polarization loop, the a contacts of described selecting switch, testing generator stator coil, ammeter, the c contacts of protective resistance and selecting switch are sequentially connected composition depolarising loop.Compared with prior art, the utility model has the advantages that Non-Destructive Testing, simple structure, is easy to detection.
Description
Technical field
The utility model is related to generator insulating diagnostic field, more particularly, to a kind of electricity generator stator coil state of insulation
Apparatus for evaluating.
Background technology
Generator is one of most important electrical equipment in power plant, and its running status directly determines the safety and stability of power network
Operation.Electricity generator stator coil is subjected to the polyfactorial synergy such as heat, electricity, machinery and environment and aging degradation occurs for a long time.
Research shows that the state of insulation of stator coil directly determines the running status of generator, therefore, accurate evaluation stator coil
State of insulation, for working out rational repair schedule, the operational reliability for improving generator is significant.
At present, the detection method of electricity generator stator coil insulation mainly has insulaion resistance, dielectric loss, shelf depreciation etc. often
Rule method of testing.These methods have the following disadvantages：First, experiment uses high pressure, and insulation may be caused to damage；Second,
Test the insulation information for obtaining single, and easily disturbed by scene, test result dispersiveness is greatly, it is difficult to accurate evaluation generator it is exhausted
Edge state.
In recent years, the diagnostic techniques based on dielectric response method is applied to the field of non destructive testing of insulation dielectric, obtains
Extensive concern.Polarization-depolarization current method (PDC, Polarization Depolarization Current) is exactly wherein
One kind, its general principle is：Apply DC voltage, electric charge, dipole in dielectric etc. at the two ends of insulation dielectric to be subject to
The effect of electric field produces dielectric displacement, then flows through the electric current referred to as polarization current of insulation dielectric, removes after applying DC voltage outward,
Surface charge discharges immediately, and inside produces process of depolarization, then flows through the electric current referred to as depolarization current of insulation dielectric.When
When the ageing state for presenting that insulate is different, polarization current changes with time from depolarization current and different trend can be presented, should
Trend can be used for characterizing the ageing state of electricity generator stator coil insulation, so that for the maintenance of generator provides guidance.
Utility model content
The purpose of this utility model be exactly provided for the defect for overcoming above-mentioned prior art to exist a kind of Non-Destructive Testing,
Simple structure, the electricity generator stator coil Condition assessment of insulation device for being easy to detection.
The purpose of this utility model can be achieved through the following technical solutions：
A kind of electricity generator stator coil Condition assessment of insulation device, is used to be assessed by using polarization-depolarization current method
The state of insulation of testing generator stator coil, the device include data acquisition controller, protective resistance and respectively with data
High-voltage DC power supply, selecting switch, ammeter and contrast display module that acquisition controller is connected, described high-voltage DC power supply
Positive pole, the b contacts of selecting switch, a contacts of selecting switch, testing generator stator coil, ammeter and high-voltage DC power supply
Negative pole is sequentially connected composition polarization loop, a contacts, testing generator stator coil, ammeter, the protection of described selecting switch
The c contacts of resistance and selecting switch are sequentially connected composition depolarising loop.
Described contrast display module includes display and for depositing testing generator stator coil history detection
The historical data base of data, described display and historical data base are connected with data acquisition controller respectively.
Described data acquisition controller is PDC-ANALYSER-1MOD testers.
Described testing generator stator coil is the electricity generator stator coil of 10.5kV~24kV.
The device also includes electric discharge ground connection copper cash, and described electric discharge ground connection copper cash one end is determined by switch with testing generator
Subcoil is connected, other end ground connection.
The voltage regulation limits of described high-voltage DC power supply are 30~2000V.
Compared with prior art, the utility model has advantages below：
1st, Non-Destructive Testing：Supply voltage is no more than 2000V, does not apply HVDC, will not be to electricity generator stator coil
Insulation causes to damage, and the utility model belongs to a kind of the cannot-harm-detection device；
2nd, simple structure, be easy to detection：The informative that test result is carried, strong antijamming capability is highly suitable for
The complicated on-the-spot test of operating mode.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model.
Fig. 2 is test result of the same stator coil of generator in different times.
Wherein, 1, high-voltage DC power supply, 2, selecting switch, 3, testing generator stator coil, 4, ammeter, 5, protection electricity
Resistance, 6, data acquisition controller.
Specific embodiment
The utility model is described in detail with specific embodiment below in conjunction with the accompanying drawings.
Embodiment：
As shown in figure 1, PDC- of the data acquisition controller 6 using the production of ALFF ENGINEERING companies of Switzerland
ANALYSER-1MOD testers, its test philosophy is：The output voltage U of high-voltage DC power supply 10, the now contact a of selecting switch 2
Connected with b, the insulation of testing generator stator coil 3 carries out polarization process, meanwhile, the polarization in the record polarization process of ammeter 4
Electric current ip, it is sent to data acquisition controller 6 and records, as the polarization time t for reaching settingp, the contact a and b of selecting switch 2 break
Open, be also turned on contact a and c, the insulation of testing generator stator coil 3 carries out process of depolarization, meanwhile, the collection of ammeter 4 is gone
Depolarization current i in polarization processd, it is sent to data acquisition controller 6 and records, when acquisition time is more than tpWhen, test knot
Beam.Now, data acquisition controller 6 is according to the polarization current i for obtainingpWith depolarization current idGeneration polarization curve and depolarising
Current curve simultaneously shows.According to polarization curve and the variation tendency of Depolarization curves, it is compared with last time result of the test, is assessed
The ageing state of generator stator insulator, the present apparatus is applied to commenting for the electricity generator stator coil state of insulation of 10.5kV~24kV
Estimate.
The specific implementation step of state estimation is as follows：
Step one：Generator is stopped transport and is reliably disconnected with circuit；Electricity generator stator coil temperature is down to environment temperature；Will hair
Coil of stator of motor is with flat copper litz wire short circuit and is grounded, and is grounded time at least 30min, removes ground connection copper cash；
Step 2：The output end of high voltage power supply is connected with the high-pressure side of electricity generator stator coil, by the shell of generator
Earth terminal is connected with the earth terminal of polarization-depolarization current test device, and ensures reliable ground；
Step 3：Start polarization-depolarization current test device, test parameter is set, wherein, output voltage U0Value
Scope is 30~2000V, and 1000V, polarization time t are set in this examplepAdjustable range be 100~5000s, in this example set
It is 1000s；
Step 4：Start test.Polarization current i in test device automatic data collection polarization processp, obtain polarization current bent
Line, after polarization process terminates, the depolarization current i in test device automatic data collection process of depolarizationd, obtain depolarization current
Curve；
Step 5：According to polarization current curve and the Changing Pattern of depolarization current curve, the result of the test with last time is entered
Row lateral comparison carries out lateral comparison with the generator of batch, the ageing state of assessment electricity generator stator coil insulation.
As shown in Fig. 2 being to test the same generator for obtaining in the utility model embodiment to determine run time different
The polarization current curve and depolarization current curve of subcoil insulation.
Claims (6)
1. a kind of electricity generator stator coil Condition assessment of insulation device, is used to be treated by using the assessment of polarization-depolarization current method
Survey the state of insulation of electricity generator stator coil (3), it is characterised in that the device includes data acquisition controller (6), protective resistance
(5) high-voltage DC power supply (1) that and is respectively connected with data acquisition controller (6), selecting switch (2), ammeter (4) and right
Than display module, described high-voltage DC power supply (1) positive pole, the b contacts of selecting switch (2), a contacts of selecting switch (2), treat
Survey electricity generator stator coil (3), ammeter (4) and high-voltage DC power supply (1) negative pole and be sequentially connected composition polarization loop, it is described
The a contacts of selecting switch (2), testing generator stator coil (3), ammeter (4), protective resistance (5) and selecting switch (2)
C contacts are sequentially connected composition depolarising loop.
2. a kind of electricity generator stator coil Condition assessment of insulation device according to claim 1, it is characterised in that described
Contrast display module includes display and the history number for depositing testing generator stator coil (3) the history detection data
According to storehouse, described display and historical data base are connected with data acquisition controller (6) respectively.
3. a kind of electricity generator stator coil Condition assessment of insulation device according to claim 1, it is characterised in that described
Data acquisition controller (6) is PDC-ANALYSER-1MOD testers.
4. a kind of electricity generator stator coil Condition assessment of insulation device according to claim 1, it is characterised in that described
Testing generator stator coil (3) is the electricity generator stator coil of 10.5kV~24kV.
5. a kind of electricity generator stator coil Condition assessment of insulation device according to claim 1, it is characterised in that the device
Also include electric discharge ground connection copper cash, described electric discharge ground connection copper cash one end is connected by switch with testing generator stator coil (3),
The other end is grounded.
6. a kind of electricity generator stator coil Condition assessment of insulation device according to claim 1, it is characterised in that described
The voltage regulation limits of high-voltage DC power supply (1) are 30~2000V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621344815.2U CN206311733U (en) | 2016-12-08 | 2016-12-08 | A kind of electricity generator stator coil Condition assessment of insulation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621344815.2U CN206311733U (en) | 2016-12-08 | 2016-12-08 | A kind of electricity generator stator coil Condition assessment of insulation device |
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| CN206311733U true CN206311733U (en) | 2017-07-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201621344815.2U Active CN206311733U (en) | 2016-12-08 | 2016-12-08 | A kind of electricity generator stator coil Condition assessment of insulation device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108646152A (en) * | 2018-05-11 | 2018-10-12 | 哈动国家水力发电设备工程技术研究中心有限公司 | A kind of method of polarization/depolarization current method check and evaluation stator bar insulation ag(e)ing state |
| CN110514999A (en) * | 2019-09-04 | 2019-11-29 | 青岛艾普智能仪器有限公司 | A kind of motor stator coil single-point damage testing method |
| CN111239562A (en) * | 2020-02-10 | 2020-06-05 | 桑原电机(大连)有限公司 | High-voltage motor insulation detection method and device |
| CN113419169A (en) * | 2021-04-23 | 2021-09-21 | 上海电机学院 | High-voltage motor stator insulation detection system and method thereof |
| 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 |
-
2016
- 2016-12-08 CN CN201621344815.2U patent/CN206311733U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108646152A (en) * | 2018-05-11 | 2018-10-12 | 哈动国家水力发电设备工程技术研究中心有限公司 | A kind of method of polarization/depolarization current method check and evaluation stator bar insulation ag(e)ing state |
| CN108646152B (en) * | 2018-05-11 | 2021-05-25 | 哈动国家水力发电设备工程技术研究中心有限公司 | Method for detecting and evaluating insulation aging state of stator bar by polarization/depolarization current method |
| CN110514999A (en) * | 2019-09-04 | 2019-11-29 | 青岛艾普智能仪器有限公司 | A kind of motor stator coil single-point damage testing method |
| CN111239562A (en) * | 2020-02-10 | 2020-06-05 | 桑原电机(大连)有限公司 | High-voltage motor insulation detection method and device |
| CN113419169A (en) * | 2021-04-23 | 2021-09-21 | 上海电机学院 | High-voltage motor stator insulation detection system and method thereof |
| 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 |
| 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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