CN104345170A - Hydraulic generator rotating speed measuring system - Google Patents
Hydraulic generator rotating speed measuring system Download PDFInfo
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- CN104345170A CN104345170A CN201310326566.9A CN201310326566A CN104345170A CN 104345170 A CN104345170 A CN 104345170A CN 201310326566 A CN201310326566 A CN 201310326566A CN 104345170 A CN104345170 A CN 104345170A
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- rotating speed
- measuring system
- speed measuring
- hydraulic generator
- computing module
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Abstract
The invention discloses a hydraulic generator rotating speed measuring system in the field of generators. The hydraulic generator rotating speed measuring system comprises a signal processing circuit, a frequency multiplication circuit, a DSP operational module, a D/A converting module, a rotating speed adjusting and alarming unit, and a display unit. The signal output end of the signal processing circuit is connected with the signal input end of the frequency multiplication circuit. The signal output end of the frequency multiplication circuit is connected with the signal input end of the DSP operational module. The DSP operational module performs data exchange with the rotating speed adjusting and alarming unit, the D/A converting module, and the display unit. The system operational capability and anti-interference capability of the hydraulic generator rotating speed measuring system are improved. The hydraulic generator rotating speed measuring system has high measurement precision and reliability and can be used by hydraulic generators.
Description
Technical field
The present invention relates to a kind of generator, particularly a kind of hydrogenerator.
Background technology
Power station adopted simulation Rotation rate signal device in a large number in the past, although it can follow the tracks of rotating speed, only provided the on-off model of rotating speed traffic coverage, can not provide use by the rotary speed actual value measured.Present tachometric survey adopts microprocessor to realize in a large number, and collection transmits and be shown as one, and improve precision, enhance interference free performance, parameter tuning etc. are also than more flexible in the past.
For the electric measurement mode of rotating speed, tach signal is after sensor measurement, and its follow-up core processor part is still main flow with single-chip microcomputer at present, or adopts the mode of PLC or CPLD to be further processed the tach signal detected.For PLC tachometric survey mode, its reliability is high, but rate accuracy is undesirable, can not provide high-precision rotating speed measured value for the closed loop adjustment of system.The application of single-chip microcomputer greatly solves the problem of tachometric survey precision, but reliability declines to some extent, due to the complicacy of working environment, the existence of various random electromagnetic interference can make system cisco unity malfunction sometimes in operational process, such as occurs the abnormal occurrencies such as the improper sudden change of tachometer value.Although attempt the reliability being improved single-chip microcomputer velocity-measuring system by software filtering, due to the relative limitation of single-chip microcomputer digital operating ability, make scm software filter effect.Although adopt CPLD real-time better, from the calculation process angle of digital signal, still there is the problem of digital operating ability relative deficiency.
Summary of the invention
The object of this invention is to provide a kind of Rotate Speed Measure System for Hydro-turbine Generator, enhance system operations ability and antijamming capability, and there is higher measuring accuracy.
The object of the present invention is achieved like this: a kind of Rotate Speed Measure System for Hydro-turbine Generator, comprise signal processing circuit, frequency multiplier circuit, DSP computing module, D/A modular converter, adjustment of rotational speed and alarm unit and display unit, the signal output part of described signal processing circuit is connected with the signal input part of frequency multiplier circuit, the signal output part of described frequency multiplier circuit is connected with the signal input part of DSP computing module, and described DSP computing module carries out exchanges data with rotating speed and alarm unit, D/A modular converter and display unit respectively.
As a further improvement on the present invention, described DSP computing module selects TMS320F240 chip.
As a further improvement on the present invention, described frequency multiplier circuit comprises CMOS phaselocked loop CD4046 and two decade counter CD4518.
When the present invention works, the computing of DSP and processing module mainly realize 3 functions: rotating speed calculates, rotating speed shows and warning, rotating speed analog output; DSP receives after the pulse signal of frequency multiplication conversion, first the speed revolution value after utilizing formula to calculate frequency multiplication, numerical value can obtain the actual speed of genset thus, after calculating the rotating speed of genset, the rotating speed of unit is demonstrated in real time to monitor unit ruuning situation, simultaneously through display unit; Based on this numerical value, the speed switch amount signal of the raising speed/reduction of speed action situation of specific rotation speeds point required in unit sequential control just can be provided through adjustment and warning circuit, and then unit is control effectively, D/A change-over circuit mainly for the host computer of Power Station Monitored Control System provide set remote control required for unit operation parameter, compared with prior art, beneficial effect of the present invention is, invention enhances system operations ability and antijamming capability, and there is higher measuring accuracy and reliability.The present invention can be used in hydrogenerator.
Accompanying drawing explanation
Fig. 1 is control principle block diagram of the present invention.
Embodiment
A kind of Rotate Speed Measure System for Hydro-turbine Generator as shown in Figure 1, comprise signal processing circuit, frequency multiplier circuit, DSP computing module, D/A modular converter, adjustment of rotational speed and alarm unit and display unit, the signal output part of signal processing circuit is connected with the signal input part of frequency multiplier circuit, the signal output part of frequency multiplier circuit is connected with the signal input part of DSP computing module, DSP computing module respectively with rotating speed and alarm unit, D/A modular converter and display unit carry out exchanges data, DSP computing module selects TMS320F240 chip, frequency multiplier circuit comprises CMOS phaselocked loop CD4046 and two decade counter CD4518.
When the present invention works, the computing of DSP and processing module mainly realize 3 functions: rotating speed calculates, rotating speed shows and warning, rotating speed analog output, DSP receives after the pulse signal of frequency multiplication conversion, first the speed revolution value after utilizing formula to calculate frequency multiplication, numerical value can obtain the actual speed of genset thus, after calculating the rotating speed of genset, the rotating speed of unit is demonstrated in real time to monitor unit ruuning situation through display unit, simultaneously, based on this numerical value, the speed switch amount signal of the raising speed/reduction of speed action situation of specific rotation speeds point required in unit sequential control just can be provided through adjustment of rotational speed and warning circuit, and then unit is control effectively, D/A change-over circuit mainly for the host computer of Power Station Monitored Control System provide set remote control required for unit operation parameter.
Those skilled in the art, under the condition not departing from the spirit and scope of the present invention that claims are determined, can also carry out various amendment to above content.Therefore scope of the present invention is not limited in above explanation, but determined by the scope of claims.
Claims (3)
1. a Rotate Speed Measure System for Hydro-turbine Generator, it is characterized in that, comprise signal processing circuit, frequency multiplier circuit, DSP computing module, D/A modular converter, adjustment of rotational speed and alarm unit and display unit, the signal output part of described signal processing circuit is connected with the signal input part of frequency multiplier circuit, the signal output part of described frequency multiplier circuit is connected with the signal input part of DSP computing module, and described DSP computing module carries out exchanges data with rotating speed and alarm unit, D/A modular converter and display unit respectively.
2. a kind of Rotate Speed Measure System for Hydro-turbine Generator according to claim 1, is characterized in that, described DSP computing module selects TMS320F240 chip.
3. a kind of Rotate Speed Measure System for Hydro-turbine Generator according to claim 1 and 2, is characterized in that, described frequency multiplier circuit comprises CMOS phaselocked loop CD4046 and two decade counter CD4518.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310326566.9A CN104345170A (en) | 2013-07-29 | 2013-07-29 | Hydraulic generator rotating speed measuring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310326566.9A CN104345170A (en) | 2013-07-29 | 2013-07-29 | Hydraulic generator rotating speed measuring system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104345170A true CN104345170A (en) | 2015-02-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310326566.9A Pending CN104345170A (en) | 2013-07-29 | 2013-07-29 | Hydraulic generator rotating speed measuring system |
Country Status (1)
| Country | Link |
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| CN (1) | CN104345170A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106124794A (en) * | 2016-08-03 | 2016-11-16 | 南京信息工程大学 | A kind of speed switch based on technique of laser imaging and speed detection method |
| CN107941203A (en) * | 2017-11-29 | 2018-04-20 | 张建洲 | A kind of intellectual faculties and method |
| CN109541252A (en) * | 2018-11-13 | 2019-03-29 | 上海锦科电气科技有限公司 | A kind of rotatation speed test method of motor |
-
2013
- 2013-07-29 CN CN201310326566.9A patent/CN104345170A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106124794A (en) * | 2016-08-03 | 2016-11-16 | 南京信息工程大学 | A kind of speed switch based on technique of laser imaging and speed detection method |
| CN107941203A (en) * | 2017-11-29 | 2018-04-20 | 张建洲 | A kind of intellectual faculties and method |
| CN109541252A (en) * | 2018-11-13 | 2019-03-29 | 上海锦科电气科技有限公司 | A kind of rotatation speed test method of motor |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150211 |