CN113567730A - Generator shaft voltage measuring method based on rotating speed signal - Google Patents
Generator shaft voltage measuring method based on rotating speed signal Download PDFInfo
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- CN113567730A CN113567730A CN202110909275.7A CN202110909275A CN113567730A CN 113567730 A CN113567730 A CN 113567730A CN 202110909275 A CN202110909275 A CN 202110909275A CN 113567730 A CN113567730 A CN 113567730A
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- 238000000034 method Methods 0.000 title claims abstract description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 24
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 24
- 238000012360 testing method Methods 0.000 claims abstract description 13
- 230000008859 change Effects 0.000 claims description 7
- 238000001179 sorption measurement Methods 0.000 claims description 6
- 230000003068 static effect Effects 0.000 claims description 3
- 238000005259 measurement Methods 0.000 description 9
- 230000015556 catabolic process Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
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- 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
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- Tests Of Circuit Breakers, Generators, And Electric Motors (AREA)
- Control Of Eletrric Generators (AREA)
Abstract
The invention discloses a generator shaft voltage measuring method based on a rotating speed signal. During testing, the photoelectric speed measuring sensor and the carbon brush fixed on the insulating connecting rod can simultaneously measure the rotating speed and voltage signals of the generator, the multiple same-channel data collectors collect voltage amplitude values corresponding to different rotating speeds from rest to rated rotating speed after the generator operates, and finally the data collectors transmit the collected data to the computer and display the rotating speed of the generator and effective values and waveforms of shaft voltage. The invention can test the values and waveforms of the corresponding shaft voltages under different rotating speeds and can obtain the values and waveforms of the corresponding shaft voltages under different powers on the premise of obtaining the rotating speed characteristics. The invention makes up the blank of measuring the shaft voltage of the generator under different working conditions and can effectively help the measurer to prevent the harm caused by the shaft voltage.
Description
Technical Field
The invention belongs to the technical field of wind driven generator detection, relates to a generator shaft voltage testing method, and particularly relates to a generator shaft voltage measuring method based on a rotating speed signal.
Background
When the rotating shaft of the generator rotates, induced electromotive force is generated at the end of the rotating shaft to form shaft voltage as long as unbalanced magnetic flux is linked on the rotating shaft, and when the shaft voltage reaches a certain value, oil film breakdown is caused, the rotating shaft and a bearing are damaged, and the normal operation of the generator is influenced.
At present, most shaft voltage tests of wind driven generators are carried out when the wind driven generators leave a factory, and measurement is rarely carried out on in-service wind driven generator sets. When the shaft voltage measurement is carried out on the wind driven generator in service, a multimeter is generally adopted for direct measurement. During testing, shaft voltage is led into the measurement multimeter from the rotating shaft, and the test risk is large. The use of a multimeter measured the effective value of the shaft voltage and failed to display the resulting shaft voltage variation waveform.
In addition, the current voltage of the shaft of the generator in service is only measured by a voltage value, and the rotating speed and the power of the generator are not required during measurement. The corresponding relation of the rotating speed, the power and the shaft voltage of the generator cannot be effectively established through simple measurement, and further the change trend of the predicted shaft voltage cannot be found, and the damage of the shaft voltage to the generator cannot be prevented.
Disclosure of Invention
In order to solve the problems in the prior art, the invention aims to provide a generator shaft voltage measuring method based on a rotating speed signal, which has the advantages that shaft voltage measurement can be carried out on a generator of a wind generating set in service, effective values and variable waveforms of the measured shaft voltage can be effectively displayed, and the corresponding relation between the rotating speed of the generator and the shaft voltage under different rotating speeds and powers can be effectively established by measuring the rotating speed of the generator and converting the power.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a generator shaft voltage measuring method based on a rotating speed signal comprises the following testing steps:
1) a magnetic adsorption device is fixed on the end face of the driving end of the generator shell;
2) setting a rotating speed characteristic curve of the generator to be tested on a computer according to the model parameters of the generator;
3) connecting the magnetic adsorption device and the multifunctional insulating rod, and erecting the multifunctional insulating rod to a proper position convenient for placing the carbon brush and the photoelectric speed measuring sensor;
4) installing a photoelectric speed measuring sensor and a carbon brush, pasting a reflective sticker on a rotating shaft surface of a driving end of a generator, and adjusting the photoelectric speed measuring sensor to enable an emitting end of the photoelectric speed measuring sensor to be aligned with the reflective sticker;
5) the multifunctional insulating rod and the carbon brush pressure spring are adjusted in a linkage manner, so that the carbon brush can be tightly attached to the rotating shaft surface of the driving end of the generator;
6) removing a grounding carbon brush at the driving end of the generator, and preparing to measure the change of the shaft voltage of the generator in a non-grounding state;
7) starting the generator to enable the generator to rise from a static state to a rated rotating speed, and automatically collecting rotating speed and voltage signals by a data acquisition unit and transmitting the signals to a computer;
8) the computer obtains corresponding shaft voltage amplitude and variation waveform under different generator rotating speeds;
9) the computer generates corresponding shaft voltage amplitude and variation waveform under different powers according to the generator rotation speed characteristic curve set by budget;
10) connecting a grounding carbon brush at the driving end of the generator, and measuring the change of the shaft voltage along with the rotation speed and the power under the grounding state of the generator;
11) and 7) repeating the steps 7) to 10), and collecting two sets of shaft voltage values of the generator grounding carbon brush in a grounding state to finish the test.
Compared with the prior art, the invention has the following advantages:
the shaft voltage measurement can be carried out on the in-service wind generating set generator, the effective value and the variation waveform of the measured shaft voltage can be effectively displayed, and the corresponding relation between the shaft voltage and the rotating speed and the power of different generators can be effectively established by measuring the rotating speed of the generator and converting the power. The invention makes up the blank of measuring the shaft voltage of the generator under different working conditions and can effectively help the measurer to prevent the harm caused by the shaft voltage.
Drawings
FIG. 1 is a flow chart of the method of the present invention.
Fig. 2 is a rotational speed characteristic of the generator.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
1) Due to the limitation of conditions such as the closed source of each data port of the wind turbine generator and the measurement accuracy of the rotating speed sensor, the rotating speed information of the generator cannot be acquired according to the existing rotating speed sensor of the generator set. In order to simplify the measuring method and speed measuring steps, the invention selects the photoelectric speed measuring sensor to be matched with the reflective sticker to measure the rotating speed of the rotating shaft of the generator.
2) Because the operation of measuring the power of the wind generating set in service is complex, the field wiring amount is large, and more measuring devices are involved, the rotating speed is converted into the corresponding power through the computer according to the rotating speed characteristic curve of the generator to be measured.
3) In order to enable the carbon brush to be tightly attached to a rotating shaft of the generator and ensure the accuracy of voltage testing, the carbon brush with the pressure spring is used for measuring the shaft voltage of the generator.
4) In order to ensure the real-time correspondence of the rotating speed of the generator and the shaft voltage, a data acquisition unit is adopted to simultaneously acquire rotating speed and voltage signals.
5) And finally, the computer displays and records the effective value and the variation waveform of the shaft voltage of the generator and establishes the corresponding relation among the rotating speed, the power and the shaft voltage of the generator.
The embodiment of the invention provides a generator shaft voltage measuring method based on a rotating speed signal, which comprises the following testing steps:
1) a magnetic adsorption device is fixed on the end face of the driving end of the generator shell;
2) setting a rotating speed characteristic curve of the generator to be tested on a computer according to the model parameters of the generator, as shown in FIG. 2;
3) connecting the magnetic adsorption device and the multifunctional insulating rod, and erecting the multifunctional insulating rod to a proper position convenient for placing the carbon brush and the photoelectric speed measuring sensor;
4) installing a photoelectric speed measuring sensor and a carbon brush, pasting a reflective sticker on a rotating shaft surface of a driving end of a generator, and adjusting the photoelectric speed measuring sensor to enable an emitting end of the photoelectric speed measuring sensor to be aligned with the reflective sticker;
5) the multifunctional insulating rod and the carbon brush pressure spring are adjusted in a linkage manner, so that the carbon brush can be tightly attached to the rotating shaft surface of the driving end of the generator;
6) removing a grounding carbon brush at the driving end of the generator, and preparing to measure the change of the shaft voltage of the generator in a non-grounding state;
7) setting a data acquisition unit, wherein the sampling frequency is 90Hz, and the output data with the average value of 0.01s is taken as an effective value;
8) starting the generator to enable the generator to rise from a static state to a rated rotating speed, and automatically collecting rotating speed and voltage signals by a data acquisition unit and transmitting the signals to a computer;
9) the computer obtains corresponding shaft voltage amplitude and variation waveform under different generator rotation speeds, wherein the step size of the rotation speed is 100rpm (testers focus on voltage values of the rotation speeds of 500rpm, 1000rpm, 1500r/min and 1700 rpm);
10) the computer generates corresponding shaft voltage amplitude and variation waveform under different powers according to a generator rotation speed characteristic curve set by budget, wherein the power step is 100kW (testers pay close attention to voltage values of 500kW, 1000kW and rated power);
11) connecting a grounding carbon brush at the driving end of the generator, and measuring the change of the shaft voltage along with the rotation speed and the power under the grounding state of the generator;
12) and 7) repeating the steps 8) to 11), and collecting two sets of shaft voltage values of the generator grounding carbon brush in a grounding state to finish the test.
The above description is only for the purpose of illustrating the present invention and the appended claims are not to be construed as limiting the scope of the invention, which is intended to cover all modifications, equivalents and improvements that are within the spirit and scope of the invention as defined by the appended claims.
Claims (1)
1. A generator shaft voltage measuring method based on a rotating speed signal is characterized by comprising the following testing steps:
1) a magnetic adsorption device is fixed on the end face of the driving end of the generator shell;
2) setting a rotating speed characteristic curve of the generator to be tested on a computer according to the model parameters of the generator;
3) connecting the magnetic adsorption device and the multifunctional insulating rod, and erecting the multifunctional insulating rod to a proper position convenient for placing the carbon brush and the photoelectric speed measuring sensor;
4) installing a photoelectric speed measuring sensor and a carbon brush, pasting a reflective sticker on a rotating shaft surface of a driving end of a generator, and adjusting the photoelectric speed measuring sensor to enable an emitting end of the photoelectric speed measuring sensor to be aligned with the reflective sticker;
5) the multifunctional insulating rod and the carbon brush pressure spring are adjusted in a linkage manner, so that the carbon brush can be tightly attached to the rotating shaft surface of the driving end of the generator;
6) removing a grounding carbon brush at the driving end of the generator, and preparing to measure the change of the shaft voltage of the generator in a non-grounding state;
7) starting the generator to enable the generator to rise from a static state to a rated rotating speed, and automatically collecting rotating speed and voltage signals by a data acquisition unit and transmitting the signals to a computer;
8) the computer obtains corresponding shaft voltage amplitude and variation waveform under different generator rotating speeds;
9) the computer generates corresponding shaft voltage amplitude and variation waveform under different powers according to the generator rotation speed characteristic curve set by budget;
10) connecting a grounding carbon brush at the driving end of the generator, and measuring the change of the shaft voltage along with the rotation speed and the power under the grounding state of the generator;
11) and 7) repeating the steps 7) to 10), and collecting two sets of shaft voltage values of the generator grounding carbon brush in a grounding state to finish the test.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110909275.7A CN113567730B (en) | 2021-08-09 | 2021-08-09 | Generator shaft voltage measurement method based on rotating speed signal |
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| CN202110909275.7A CN113567730B (en) | 2021-08-09 | 2021-08-09 | Generator shaft voltage measurement method based on rotating speed signal |
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| CN113567730A true CN113567730A (en) | 2021-10-29 |
| CN113567730B CN113567730B (en) | 2024-05-24 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114646797A (en) * | 2022-03-17 | 2022-06-21 | 山东沃翔智慧能源科技有限公司 | Wind driven generator shaft voltage on-line monitoring device and early warning method |
Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4519669A (en) * | 1984-03-30 | 1985-05-28 | General Electric Company | Braid clamp for generator shaft voltage and current pickup |
| US5032826A (en) * | 1987-10-29 | 1991-07-16 | Westinghouse Electric Corp. | Core monitor that uses rotor shaft voltages |
| CN1287296A (en) * | 1999-09-07 | 2001-03-14 | 三星电子株式会社 | Apparatus and method for detecting rotation speed of DC spindle drive motor |
| CN1601294A (en) * | 2004-10-13 | 2005-03-30 | 哈尔滨工业大学 | Detection method of d.c. permanent magnet dynamo parameter and performance non-loading |
| CN101430358A (en) * | 2008-12-10 | 2009-05-13 | 河南国网宝泉抽水蓄能有限公司 | Head-machine first water pump behavior full-group start test method for pump storage plant |
| KR101303952B1 (en) * | 2012-06-28 | 2013-09-05 | 현대중공업 주식회사 | Induction motor control apparatus |
| CN204925215U (en) * | 2015-07-30 | 2015-12-30 | 龙源（北京）风电工程技术有限公司 | On line measurement device of generator shaft voltage among measurement wind turbine generator system |
| CN105515489A (en) * | 2016-01-21 | 2016-04-20 | 珠海格力节能环保制冷技术研究中心有限公司 | Method and device for controlling motor rotation speed |
| CN205992017U (en) * | 2016-08-29 | 2017-03-01 | 酒泉钢铁(集团)有限责任公司 | A kind of generator shaft voltage measuring apparatus |
| CN206292284U (en) * | 2016-11-02 | 2017-06-30 | 中广核核电运营有限公司 | Generator amature shaft-voltage measurement part |
| CN108156830A (en) * | 2015-10-08 | 2018-06-12 | Abb瑞士股份有限公司 | There is the motor of resonance circuit in axis ground connection |
| CN108303648A (en) * | 2018-02-07 | 2018-07-20 | 广州发展集团股份有限公司 | The monitoring device and its monitoring method of generator's motor shaft operating status |
| CN208297593U (en) * | 2018-05-23 | 2018-12-28 | 华电通用轻型燃机设备有限公司 | Boat remodeling gas turbine generator shaft voltage and shaft current monitoring device |
| CN111812383A (en) * | 2020-07-08 | 2020-10-23 | 江苏核电有限公司 | Tool and method for measuring shaft voltage of steam turbine generator |
| CN112138328A (en) * | 2020-09-15 | 2020-12-29 | 广州视源电子科技股份有限公司 | Exercise machine force-losing protection method and device, exercise machine and medium |
| CN112260603A (en) * | 2020-09-27 | 2021-01-22 | 深圳市鑫汇科股份有限公司 | Motor drive control method, control device and storage medium |
-
2021
- 2021-08-09 CN CN202110909275.7A patent/CN113567730B/en active Active
Patent Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4519669A (en) * | 1984-03-30 | 1985-05-28 | General Electric Company | Braid clamp for generator shaft voltage and current pickup |
| US5032826A (en) * | 1987-10-29 | 1991-07-16 | Westinghouse Electric Corp. | Core monitor that uses rotor shaft voltages |
| CN1287296A (en) * | 1999-09-07 | 2001-03-14 | 三星电子株式会社 | Apparatus and method for detecting rotation speed of DC spindle drive motor |
| CN1601294A (en) * | 2004-10-13 | 2005-03-30 | 哈尔滨工业大学 | Detection method of d.c. permanent magnet dynamo parameter and performance non-loading |
| CN101430358A (en) * | 2008-12-10 | 2009-05-13 | 河南国网宝泉抽水蓄能有限公司 | Head-machine first water pump behavior full-group start test method for pump storage plant |
| KR101303952B1 (en) * | 2012-06-28 | 2013-09-05 | 현대중공업 주식회사 | Induction motor control apparatus |
| CN204925215U (en) * | 2015-07-30 | 2015-12-30 | 龙源（北京）风电工程技术有限公司 | On line measurement device of generator shaft voltage among measurement wind turbine generator system |
| CN108156830A (en) * | 2015-10-08 | 2018-06-12 | Abb瑞士股份有限公司 | There is the motor of resonance circuit in axis ground connection |
| CN105515489A (en) * | 2016-01-21 | 2016-04-20 | 珠海格力节能环保制冷技术研究中心有限公司 | Method and device for controlling motor rotation speed |
| CN205992017U (en) * | 2016-08-29 | 2017-03-01 | 酒泉钢铁(集团)有限责任公司 | A kind of generator shaft voltage measuring apparatus |
| CN206292284U (en) * | 2016-11-02 | 2017-06-30 | 中广核核电运营有限公司 | Generator amature shaft-voltage measurement part |
| CN108303648A (en) * | 2018-02-07 | 2018-07-20 | 广州发展集团股份有限公司 | The monitoring device and its monitoring method of generator's motor shaft operating status |
| CN208297593U (en) * | 2018-05-23 | 2018-12-28 | 华电通用轻型燃机设备有限公司 | Boat remodeling gas turbine generator shaft voltage and shaft current monitoring device |
| CN111812383A (en) * | 2020-07-08 | 2020-10-23 | 江苏核电有限公司 | Tool and method for measuring shaft voltage of steam turbine generator |
| CN112138328A (en) * | 2020-09-15 | 2020-12-29 | 广州视源电子科技股份有限公司 | Exercise machine force-losing protection method and device, exercise machine and medium |
| CN112260603A (en) * | 2020-09-27 | 2021-01-22 | 深圳市鑫汇科股份有限公司 | Motor drive control method, control device and storage medium |
Non-Patent Citations (2)
| Title |
|---|
| GREG STONE 等: "Monitoring of shaft voltages and grounding currents in rotating machines", 《2014 17TH INTERNATIONAL CONFERENCE ON ELECTRICAL MACHINES AND SYSTEMS》, 19 January 2015 (2015-01-19), pages 3361 - 3364 * |
| 孙莉君 等: "汽轮发电机组轴电压在线监测与分析", 《沈阳工程学院学报（自然科学版）》, vol. 12, no. 3, 31 July 2016 (2016-07-31), pages 243 - 247 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114646797A (en) * | 2022-03-17 | 2022-06-21 | 山东沃翔智慧能源科技有限公司 | Wind driven generator shaft voltage on-line monitoring device and early warning method |
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| CN113567730B (en) | 2024-05-24 |
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