CN102004167A - Measuring method for rotate speed of turbine - Google Patents
Measuring method for rotate speed of turbine Download PDFInfo
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- CN102004167A CN102004167A CN 201010510355 CN201010510355A CN102004167A CN 102004167 A CN102004167 A CN 102004167A CN 201010510355 CN201010510355 CN 201010510355 CN 201010510355 A CN201010510355 A CN 201010510355A CN 102004167 A CN102004167 A CN 102004167A
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Abstract
The invention discloses a measuring method for rotate speed of a turbine, which is characterized by comprising the following steps that (1) the number of configuration teeth of the turbine is set for an FPGA (Field Programmable Gate Array) through a DPU (Dispersion Processing Unit); (2) a gear of the turbine rotates to generate a series of positive rotation wave signals through a corresponding a photoelectric pulse sensor, and the signals are transmitted to an OPC (Optical Proximity Correction) module; (3) a shaping circuit shapes the signals into square wave signals and the square wave signals are transmitted to the FPGA after being isolated by a high-speed optical coupler; and (4) standard pulses output by a standard frequency are filled from the first square wave rising edge of the FPGA and are counted from the first square wave rising edge of the FPGA to a plurality of square wave ring edges of the configuration teeth, the number of the filled pulses is transmitted to the DPU, and the rotate speed of the turbine is worked out by the DPU. According to the measuring method provided by the invention, the time spent by the turbine to rotate a whole circle is measured according to the number of teeth of the turbine to work out the rotate speed of the turbine, and because the time spent by the turbine to rotate a circle but not the time spent among the teeth, the calculation error caused by the difference among the gaps of the teeth of the turbine is eliminated.
Description
Technical field
The present invention relates to the measuring method of a kind of turbine speed of digital electro-hydraulic regulating system for steam turbine (vehicle economy H), specifically be applicable in the overspeed protection module of 600MW and following steam turbine of thermal power plant, feed pump turbine.
Background technology
In the digital electro-hydraulic control system (vehicle economy H) of steam turbine of thermal power plant, feed pump turbine, relate to the measurement of turbine speed; turbine speed exceed rated speed 103% and 110% o'clock; speed measuring device need provide alerting signal; send turbine emergency security system (ETS) to the quick closedown solenoid valve, realize stoppage protection.
Digital electro-hydraulic regulating system for steam turbine all is to rotate corresponding photoimpact sensor by the steam turbine gear to produce pulse signal, to calculating current turbine speed behind this signal measurement when realization is measured turbine speed at present.The steam turbine gear quantity of different brackets is difference to some extent. basic evenly distribution between the gear, but the difference of manufacturer's machining precision can cause this space width to have diversity factor.
And the conventional now method that realizes that turbine speed is measured has two kinds: 1, and the frequency measurement method: the time between MEASUREMENT OF STEAM turbine tooth and the tooth, and calculate turbine speed.This method shortcoming: because spacing does not wait the jump variation 2 that causes the survey frequency result between tooth and the tooth, survey all methods: measure in the set time, the number of teeth that steam turbine turns over calculates the rotating speed of steam turbine.This method shortcoming: owing to turn over the number of teeth and have ± 1 tooth error in the certain hour, cause measure under the low speed situation inaccurate.
Summary of the invention
The measuring method that the purpose of this invention is to provide a kind of turbine speed can improve the measuring accuracy of turbine speed.
For solving the problems of the technologies described above, the invention provides a kind of measuring method of turbine speed, it is characterized in that, may further comprise the steps:
1) sets the steam turbine configuration number of teeth by DPU to FPGA;
2) the steam turbine gear rotates and produces a series of dextrorotation ripple signals and be transferred to the OPC module by corresponding photoimpact sensor;
3) shaping circuit is passed to FPGA after isolating with this dextrorotation ripple signal shaping becoming square-wave signal and by high speed photo coupling;
4) FPGA also counts in the full sized pules that first square wave rising edge begins to fill by standard frequency output, stops counting behind a configuration number of teeth square wave rising edge, and the pulse number of filling is passed to DPU, calculates turbine speed by DPU.
Ultimate principle of the present invention is to have rotated between the number of teeth (be complete take turns) of configuration at steam turbine, inserts the high frequency sprocket pulse, calculates turbine speed with high frequency sprocket pulse value.Online setting of increase and power down keep the steam turbine number of gears parameter of function in overspeed protective device, thereby guarantee and can carry out the calculating of rotating speed by the MEASUREMENT OF STEAM turbine rotation one whole correct time that encloses, and go for the steam turbine of optional tooth number.
Owing in the calculating of DEH digital electro-hydraulic control system turbine over control module, added configurable information--the number of teeth of steam turbine guarantees and can rotate a whole correct time that encloses by the MEASUREMENT OF STEAM turbine; rather than the time between measurement tooth and the tooth; get rid of because the frequency that steam turbine space width difference causes measurements and calculations to come out produces the problem of jumping, do not exist yet all methods of survey have within a certain period of time ± error of 1 number of teeth causes the inaccurate of measurement.
The beneficial effect that the present invention reached:
The present invention calculates turbine speed according to the number of teeth MEASUREMENT OF STEAM turbine whole time of enclosing of rotating of steam turbine, like this because what calculate is that steam turbine rotates time of a circle but not time between tooth and the tooth, thereby eliminated the error of calculation that the difference owing to the steam turbine space width causes; When steam turbine high speed rotated, this method also can guarantee to measure the response time simultaneously.Owing to be not to survey all methods, so under the slow-revving situation of steam turbine, can measure rotating speed accurately yet.
Description of drawings
Fig. 1 is an OPC module speed measuring module system chart.
Embodiment
Shown in Fig. 1 speed measuring module system chart, the DPU(data processor) sets the steam turbine configuration number of teeth to FPGA, the steam turbine gear rotates and produces a series of dextrorotation ripple signals and be transferred to the OPC module by corresponding photoimpact sensor, shaping circuit this signal shaping is become square-wave signal and isolate by high speed photo coupling after pass to FPGA, FPGA also counts in the full sized pules that first square wave rising edge begins to fill by standard frequency output, behind a configuration number of teeth square wave rising edge, stop counting, and the pulse number of filling passed to DPU, and calculate turbine speed by DPU.The method is for measuring different steam turbines, the particularly discrepant turbine speed of spacing between the prototype gear, owing to being calculates turbine speed the MEASUREMENT OF STEAM turbine whole time of enclosing of rotating, so there is not rotating speed jump problem.
Advantage of the present invention is to have eliminated the calculating rotating speed that causes the difference of space width to cause owing to the machining precision difference between the steam turbine gear to have the problem of jumping, thereby accurately measures turbine speed.
Technical term:
Digital electro-hydraulic control system vehicle economy H,, form by computer control part and EH hydraulic actuating mechanism.Comprise OPC and VCC.
The turbine over control module is called for short OPC; detect turbine speed; and judging whether to surpass overspeed protection and control setting value, this module also has removal of load prediction (LDA) function, power-load unbalanced (PLU) function etc. simultaneously, and can realize on-line operation overspeed protection test.
Below only the present invention is described further with most preferred embodiment, and so it is not a limitation of the invention, and protection scope of the present invention is as the criterion with the content that is illustrated in claim.
Claims (1)
1. the measuring method of a turbine speed is characterized in that, may further comprise the steps:
Set the steam turbine configuration number of teeth by DPU to FPGA;
The steam turbine gear rotates and produces a series of dextrorotation ripple signals and be transferred to the OPC module by corresponding photoimpact sensor;
Shaping circuit is passed to FPGA after isolating with this dextrorotation ripple signal shaping becoming square-wave signal and by high speed photo coupling;
FPGA also counts in the full sized pules that first square wave rising edge begins to fill by standard frequency output, stops counting behind a configuration number of teeth square wave rising edge, and the pulse number of filling is passed to DPU, calculates turbine speed by DPU.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105103557A CN102004167B (en) | 2010-10-19 | 2010-10-19 | Measuring method for rotate speed of turbine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105103557A CN102004167B (en) | 2010-10-19 | 2010-10-19 | Measuring method for rotate speed of turbine |
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| CN102004167A true CN102004167A (en) | 2011-04-06 |
| CN102004167B CN102004167B (en) | 2012-07-25 |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103018474A (en) * | 2011-09-27 | 2013-04-03 | 上海航天控制工程研究所 | FPGA (Field Programmable Gata Array)-based motor speed and rotating direction detecting device |
| CN103048485A (en) * | 2013-01-09 | 2013-04-17 | 国电联合动力技术有限公司 | Rotating speed measuring method and measuring system of wind driven generator |
| CN104033192A (en) * | 2014-06-13 | 2014-09-10 | 哈尔滨汽轮机厂有限责任公司 | Second or first rotation speed and jumping protective device for steam turbine |
| CN104033193A (en) * | 2014-06-13 | 2014-09-10 | 哈尔滨汽轮机厂有限责任公司 | Two-out-of-three rotation speed jumping protective device for steam turbine |
| CN104931879A (en) * | 2015-05-26 | 2015-09-23 | 广西电网有限责任公司电力科学研究院 | Test method for kinetic energy of generator |
| CN105547604A (en) * | 2015-12-10 | 2016-05-04 | 珠海格力电器股份有限公司 | Air conditioner and fan rotating speed detection method and device thereof |
| CN105699683A (en) * | 2016-03-29 | 2016-06-22 | 杭州和利时自动化有限公司 | Steam turbine rotation speed measurement method and steam turbine rotation speed measurement system |
| CN108646048A (en) * | 2018-05-29 | 2018-10-12 | 宁波帝洲自动化科技有限公司 | A kind of speed detector based on FPGA |
| CN109188077A (en) * | 2018-09-10 | 2019-01-11 | 杭州和利时自动化有限公司 | A kind of signal frequency measuring method, system, device and readable storage medium storing program for executing |
| CN113138290A (en) * | 2021-04-13 | 2021-07-20 | 西安热工研究院有限公司 | Method for measuring rotation speed of steam turbine generator unit by using eddy current sensor |
| CN114997247A (en) * | 2022-07-28 | 2022-09-02 | 成都凯天电子股份有限公司 | FPGA-based unmanned aerial vehicle turbine engine rotating speed acquisition method and system |
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| US4434470A (en) * | 1981-02-09 | 1984-02-28 | The Bendix Corporation | Speed measurement system with means for calculating the exact time period of a known quantity of speed pulses |
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| CN101545916A (en) * | 2008-03-26 | 2009-09-30 | 凯迈(洛阳)机电有限公司 | Measurement circuit and measurement method for rotation speed of CW type electric eddy current dynamometer |
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2010
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Patent Citations (5)
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| US4434470A (en) * | 1981-02-09 | 1984-02-28 | The Bendix Corporation | Speed measurement system with means for calculating the exact time period of a known quantity of speed pulses |
| GB2159955A (en) * | 1984-06-05 | 1985-12-11 | Mtu Friedrichshafen Gmbh | Electronic speed measurement of a reciprocating internal-combustion engine |
| CN101029900A (en) * | 2007-02-06 | 2007-09-05 | 鲁东大学 | Apparatus and method for measuring rotation-axis speed by impulse |
| CN201060207Y (en) * | 2007-05-30 | 2008-05-14 | 刘海泉 | Stepping motor type engine speed hours meter |
| CN101545916A (en) * | 2008-03-26 | 2009-09-30 | 凯迈(洛阳)机电有限公司 | Measurement circuit and measurement method for rotation speed of CW type electric eddy current dynamometer |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103018474A (en) * | 2011-09-27 | 2013-04-03 | 上海航天控制工程研究所 | FPGA (Field Programmable Gata Array)-based motor speed and rotating direction detecting device |
| CN103048485A (en) * | 2013-01-09 | 2013-04-17 | 国电联合动力技术有限公司 | Rotating speed measuring method and measuring system of wind driven generator |
| CN104033192A (en) * | 2014-06-13 | 2014-09-10 | 哈尔滨汽轮机厂有限责任公司 | Second or first rotation speed and jumping protective device for steam turbine |
| CN104033193A (en) * | 2014-06-13 | 2014-09-10 | 哈尔滨汽轮机厂有限责任公司 | Two-out-of-three rotation speed jumping protective device for steam turbine |
| CN104931879A (en) * | 2015-05-26 | 2015-09-23 | 广西电网有限责任公司电力科学研究院 | Test method for kinetic energy of generator |
| CN105547604A (en) * | 2015-12-10 | 2016-05-04 | 珠海格力电器股份有限公司 | Air conditioner and fan rotating speed detection method and device thereof |
| CN105699683A (en) * | 2016-03-29 | 2016-06-22 | 杭州和利时自动化有限公司 | Steam turbine rotation speed measurement method and steam turbine rotation speed measurement system |
| CN108646048A (en) * | 2018-05-29 | 2018-10-12 | 宁波帝洲自动化科技有限公司 | A kind of speed detector based on FPGA |
| CN109188077A (en) * | 2018-09-10 | 2019-01-11 | 杭州和利时自动化有限公司 | A kind of signal frequency measuring method, system, device and readable storage medium storing program for executing |
| CN113138290A (en) * | 2021-04-13 | 2021-07-20 | 西安热工研究院有限公司 | Method for measuring rotation speed of steam turbine generator unit by using eddy current sensor |
| CN113138290B (en) * | 2021-04-13 | 2022-08-23 | 西安热工研究院有限公司 | Method for measuring rotation speed of steam turbine generator unit by using eddy current sensor |
| CN114997247A (en) * | 2022-07-28 | 2022-09-02 | 成都凯天电子股份有限公司 | FPGA-based unmanned aerial vehicle turbine engine rotating speed acquisition method and system |
| CN114997247B (en) * | 2022-07-28 | 2022-11-25 | 成都凯天电子股份有限公司 | FPGA-based unmanned aerial vehicle turbine engine rotating speed acquisition method and system |
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| Publication number | Publication date |
|---|---|
| CN102004167B (en) | 2012-07-25 |
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