CN103323617A - Static electronic speed testing device and method for generator - Google Patents
Static electronic speed testing device and method for generator Download PDFInfo
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- CN103323617A CN103323617A CN2013102289030A CN201310228903A CN103323617A CN 103323617 A CN103323617 A CN 103323617A CN 2013102289030 A CN2013102289030 A CN 2013102289030A CN 201310228903 A CN201310228903 A CN 201310228903A CN 103323617 A CN103323617 A CN 103323617A
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Abstract
The invention discloses a static electronic speed testing device and method for a generator. The static electronic speed testing device comprises a phase voltage sampling module, an operational amplifier isolation module, three-phase voltage intersection point sampling module, a shaping and filtering module, a digital signal processor and a power module, wherein the phase voltage sampling module comprises three sampling circuits connected with three-phase voltage output ends of a secondary winding of the generator respectively; the operational amplifier isolation module comprises three operational amplifier circuits connected with output ends of the sampling circuits respectively; the three-phase voltage intersection point sampling module comprises six sampling circuits used for obtaining voltage signals of six intersection points, within a circle, of three-phase voltages; the shaping and filtering module is used for shaping and filtering analog levels where the intersection points are sampled; the digital signal processor is used for outputting rotating speed according to signals transmitted by the shaping and filtering module. The static electronic speed testing device does not need installing on the output shaft of the generator, and the rotating speed of the generator can be tested just through the three-phase output voltage signals. Influence of the environment on the static electronic speed testing device is small, and the static electronic speed testing device is easy to install and maintain and low in cost and fault rate.
Description
Technical field
The present invention relates to a kind of speed measuring device, in particular for the state type electronic speed-determination device of generator.
Background technology
In electricity generation system, the rotating speed that detects generator is very important, and many control methods all are in the basic enterprising row operation of the actual speed of measuring generator.For example, the maximal power tracing of our generator control all accurately generator speed participate in controlling.Existing generator speed measuring device adopts light code sensor or Hall element to test the speed more, utilizes the physical construction of rotary kinetic measurement, and installation difficulty is large, and failure rate is high, and Long Service Life can subtract greatly, brings great inconvenience for user's maintenance.Take the light code sensor as example; it is the sensor that the geometry of machinery displacement on the magneto output shaft is converted to pulse or digital quantity by opto-electronic conversion; it easily is subjected to the impact of environment (illumination, dust) in the course of the work; precision is low; the rotary speed unstabilization that measures is fixed; cause power given that disturbance is arranged, even lose the generator speed signal and shut down.
Summary of the invention
For solving the problems of the technologies described above, the purpose of this invention is to provide state type electronic speed-determination device and speed-measuring method thereof for generator.
The technical solution used in the present invention is: be used for the state type electronic speed-determination device of generator, comprise:
The phase voltage sampling module comprises three sample circuits that are connected with generator auxiliary winding three-phase voltage output terminal respectively;
The amplifier isolation module comprises three discharge circuits that are connected with described sample circuit output terminal respectively, is used for sampled voltage operation amplifier and isolation to the phase voltage sampling module;
Three-phase voltage intersection point sampling module comprises six sample circuits, and described sample circuit is used for obtaining the voltage signal of six intersection points of three-phase voltage in one-period;
The shaping filter module is used for analog level shaping, filtering behind the taking-up intersection point;
Digital signal processor is used for the signal output speed according to the transmission of shaping filter module;
Power module is used to amplifier isolation module, three-phase voltage intersection point sampling module, shaping filter module, digital signal processor that the voltage input is provided.
The input signal of described sample circuit is any two phase signals in the three-phase voltage of amplifier isolation module output, is used for exporting with control by the comparison of operational amplifier output high level signal when namely described any two-phase signal level equates.
Be in series with level switch module between described three-phase voltage intersection point sampling module and the shaping filter module, be used for the incoming level of three-phase voltage intersection point sampling module is changed, described three-phase voltage intersection point sampling module is powered by power module.
Be in series with the light-coupled isolation module between described level switch module and the shaping filter module, described light-coupled isolation module is powered by power module.
Described digital signal processor comprises A/D analog to digital converter, dsp processor, host computer, described A/D analog to digital converter is used for the analog output signal of shaping filter module is converted into digital signal, described dsp processor tests out rotating speed according to the digital signal that the A/D analog to digital converter transforms, and described host computer is used for showing rotating speed.
A kind of speed-measuring method of the state type electronic speed-determination device for generator, described state type electronic speed-determination device for generator comprises: the phase voltage sampling module comprises three sample circuits that are connected with generator auxiliary winding three-phase voltage output terminal respectively; The amplifier isolation module comprises three discharge circuits that are connected with described sample circuit output terminal respectively, is used for sampled voltage operation amplifier and isolation to the phase voltage sampling module; Three-phase voltage intersection point sampling module comprises six sample circuits, and described sample circuit is used for obtaining the voltage signal of six intersection points of three-phase voltage in one-period; The shaping filter module is used for analog level shaping, filtering behind the taking-up intersection point; Digital signal processor is used for the signal output speed according to the transmission of shaping filter module; Power module is used to amplifier isolation module, three-phase voltage intersection point sampling module, shaping filter module, digital signal processor that the voltage input is provided; It is characterized in that: may further comprise the steps: the three-phase output voltage signal that A) gathers generator by the phase voltage sampling module; B) the three-phase voltage signal amplifier isolation of amplifier isolation module to collecting; C) obtain the voltage signal of six intersection points of three-phase voltage in one-period by three-phase voltage intersection point sampling module; D) the shaping filter module is to taking out analog level shaping, the filtering behind the intersection point; E) the signal output speed of digital signal processor after according to shaping filter.
Described step C adjusts amplitude the laggard line level conversion of voltage signal of obtaining six intersection points of three-phase voltage in one-period.
Described step C adopts light-coupled isolation to promote transmission speed after level conversion.
Described step D comprises: D1) input pulse; D2) regulating impulse; D3) reverse shaped pulse; D4) pulse bandwidth filtering; D5) output direct current.
Described step e comprises: E1) input direct-current; E2) simulating signal of input is carried out analog to digital conversion; E3) come output speed according to the digital signal input speed function after the conversion; E4) show rotating speed.
Beneficial effect of the present invention:
The present invention is used for state type electronic speed-determination device and the speed-measuring method thereof of generator, need not to be installed on the output shaft of generator, the three-phase output voltage signal that only need measure generator just can be measured the rotating speed of generator, it is a kind of static electronics method of testing, be subjected to the impact of environment less, I﹠M is easy, and cost is low, failure rate is low.
Description of drawings
Below in conjunction with accompanying drawing the specific embodiment of the present invention is described further.
Fig. 1 is functional block diagram of the present invention;
Fig. 2 is digital signal processor module frame chart of the present invention;
Fig. 3 is the circuit diagram of phase voltage sampling module;
Fig. 4 is the circuit diagram of amplifier isolation module;
Fig. 5 is the circuit diagram of three-phase voltage intersection point sampling module;
Fig. 6 is the circuit diagram of level switch module;
Fig. 7 is the circuit diagram of light-coupled isolation module;
Fig. 8 is the circuit diagram of shaping filter module;
Fig. 9 is the process flow diagram of shaping filter module;
Figure 10 is the process flow diagram of digital signal processor module;
Figure 11 is the circuit diagram of power module.
Embodiment
The rotor that the present invention is used for generator tests the speed, and calculates the rotating speed of generator based on the variation of its three-phase output voltage signal, and the cardinal principle of foundation is as follows:
1.y1＝sin(ωx)；
2.y1＝sin(ωx+2*π/3)；
3.y1＝sin(ωx+4*π/3)；
Above three functional expressions that formula is three-phase voltage, get 0～2* π with the scope of x, it is example that ω gets 100* π, and top three formula are obtained in twos intersection point, i.e. 1 and 2 intersection point, 1: 3 intersection point, 2 and 3 intersection point.
The result is π/6,3* π/6,5* π/6,7* π/6,9* π/6,11* π/6.When the frequencies omega of three-phase voltage changed, intersection point also changed according to a certain percentage, frequencies omega and rotation speed n one-to-one relationship, and its relational expression:
Namely
Wherein, p is the number of pole-pairs of synchronous generator.
Otherwise when intersection point (frequencies omega) changed, namely the rotation speed n of generator also changed thereupon.
With reference to Fig. 1-shown in Figure 11, be used for the state type electronic speed-determination device of generator, comprising:
Phase voltage sampling module 1 comprises three sample circuits that are connected with generator auxiliary winding three-phase voltage output terminal respectively;
Three-phase voltage intersection point sampling module 3 comprises six sample circuits, and described sample circuit is used for obtaining the voltage signal of six intersection points of three-phase voltage in one-period; Wherein, the input signal of sample circuit is any two phase signals in the three-phase voltage of amplifier isolation module 2 outputs, be used for output signal being controlled with the integrating circuit combination by the comparison of operational amplifier output high level pulse signal when namely described any two-phase signal level equates;
For adjusting output amplitude, be in series with level switch module 7 between three-phase voltage intersection point sampling module 3 and the shaping filter module 4, be used for the incoming level of three-phase voltage intersection point sampling module 3 is converted to 24V by 15V, three-phase voltage intersection point sampling module 3 is by power module 6 power supplies.
In addition, be in series with light-coupled isolation module 8 between level switch module 7 and the shaping filter module 4, to improve transmission speed, light-coupled isolation module 8 is by power module 6 power supplies.
As shown in Figure 8, shaping filter module 4 is provided with turnable pulse width resistance to regulate input pulse.
As shown in Figure 2, digital signal processor 5 comprises A/D analog to digital converter 51, dsp processor 52, host computer 53, A/D analog to digital converter 51 is used for the analog output signal of shaping filter module 4 is converted into digital signal, dsp processor 52 tests out rotating speed according to the digital signal that A/D analog to digital converter 51 transforms, and host computer 53 is used for showing rotating speed.
A kind of speed-measuring method of the state type electronic speed-determination device for generator, described state type electronic speed-determination device for generator comprises: phase voltage sampling module 1 comprises three sample circuits that are connected with generator auxiliary winding three-phase voltage output terminal respectively; Amplifier isolation module 2 comprises three discharge circuits that are connected with described sample circuit output terminal respectively, is used for sampled voltage operation amplifier and isolation to phase voltage sampling module 1; Three-phase voltage intersection point sampling module 3 comprises six sample circuits, and sample circuit is used for obtaining the voltage signal of six intersection points of three-phase voltage in one-period; Shaping filter module 4 is used for analog level shaping, filtering behind the taking-up intersection point; Digital signal processor 5 is used for the signal output speed according to 4 transmission of shaping filter module; Power module 6 is used to amplifier isolation module 2, three-phase voltage intersection point sampling module 3, shaping filter module 4, digital signal processor 5 that the voltage input is provided; May further comprise the steps: the three-phase output voltage signal that A) gathers generator by phase voltage sampling module 1; B) the three-phase voltage signal amplifier isolation that collects of 2 pairs of amplifier isolation modules; C) obtain the voltage signal of six intersection points of three-phase voltage in one-period by three-phase voltage intersection point sampling module 3; D) analog level shaping, the filtering behind 4 pairs of taking-ups of shaping filter module intersection point; E) digital signal processor 5 is according to the signal output speed behind the shaping filter.
As the further optimization of the technical program, step C adjusts amplitude the laggard line level conversion of voltage signal of obtaining six intersection points of three-phase voltage in one-period.
As the further optimization of the technical program, step C adopts light-coupled isolation to promote transmission speed after level conversion.
As shown in Figure 9, step D comprises: D1) input pulse; D2) regulating impulse; D3) reverse shaped pulse; D4) pulse bandwidth filtering; D5) output direct current 0～10v.
As shown in figure 10, step e comprises: E1) input 0-10v direct current signal; E2) simulating signal of input is carried out analog to digital conversion digital signal (sexadecimal 0000～7FFF); E3) come output speed according to the digital signal input speed function after the conversion; E4) show rotating speed.
Wherein, step e 3 is asked the Rotation Process foundation
Value * 0.000833; Wherein, n is rotating speed, and the AD value is the result of A/D analog to digital converter 51 outputs.The range of the A/D analog to digital converter 51 that the present embodiment uses is 65535, and voltage is 20V.
Its corresponding relation is as follows:
0～32767： 0V～+10V；
32768～65535：-10V～0V；
2.73 to be voltage turn with the relation of rotating speed: 10V corresponding 27.3 (this relation is to be worth by the swept resistance in the regulating circuit, can be other value, and here we are fixing this value, thus the relation that is fixed).
Such as: the AD value is 10000,
(turning).
The present invention is used for state type electronic speed-determination device and the method for testing thereof of generator, need not to be installed on the output shaft of generator, the three-phase output voltage signal that only need measure generator just can be measured the rotating speed of generator, it is a kind of static electronics method of testing, be subjected to the impact of environment less, I﹠M is easy, and cost is low, failure rate is low.
The above only is preferential embodiment of the present invention, and the present invention is not limited to above-mentioned embodiment, as long as realize that with basic identical means the technical scheme of the object of the invention all belongs within protection scope of the present invention.
Claims (10)
1. be used for the state type electronic speed-determination device of generator, it is characterized in that comprising:
Phase voltage sampling module (1) comprises three sample circuits that are connected with generator auxiliary winding three-phase voltage output terminal respectively;
Amplifier isolation module (2) comprises three discharge circuits that are connected with described sample circuit output terminal respectively, is used for sampled voltage operation amplifier and isolation to phase voltage sampling module (1);
Three-phase voltage intersection point sampling module (3) comprises six sample circuits, and described sample circuit is used for obtaining the voltage signal of six intersection points of three-phase voltage in one-period;
Shaping filter module (4) is used for analog level shaping, filtering behind the taking-up intersection point;
Digital signal processor (5) is used for the signal output speed according to shaping filter module (4) transmission;
Power module (6) is used to amplifier isolation module (2), three-phase voltage intersection point sampling module (3), shaping filter module (4), digital signal processor (5) that the voltage input is provided.
2. the state type electronic speed-determination device for generator according to claim 1, it is characterized in that: the input signal of described sample circuit is any two phase signals in the three-phase voltage of amplifier isolation module (2) output, be used for exporting with control by the comparison of operational amplifier output high level signal when namely described any two-phase signal level equates.
3. the state type electronic speed-determination device for generator according to claim 1, it is characterized in that: be in series with level switch module (7) between described three-phase voltage intersection point sampling module (3) and the shaping filter module (4), be used for the incoming level of three-phase voltage intersection point sampling module (3) is changed, described three-phase voltage intersection point sampling module (3) is powered by power module (6).
4. the state type electronic speed-determination device for generator according to claim 3, it is characterized in that: be in series with light-coupled isolation module (8) between described level switch module (7) and the shaping filter module (4), described light-coupled isolation module (8) is powered by power module (6).
5. the state type electronic speed-determination device for generator according to claim 1, it is characterized in that: described digital signal processor (5) comprises A/D analog to digital converter (51), dsp processor (52), host computer (53), described A/D analog to digital converter (51) is used for the analog output signal of shaping filter module (4) is converted into digital signal, described dsp processor (52) tests out rotating speed according to the digital signal that A/D analog to digital converter (51) transforms, and described host computer (53) is used for showing rotating speed.
6. method of testing that is used for the state type electronic speed-determination device of generator, the state type electronic speed-determination device that wherein is used for generator comprises: phase voltage sampling module (1) comprises three sample circuits that are connected with generator auxiliary winding three-phase voltage output terminal respectively; Amplifier isolation module (2) comprises three discharge circuits that are connected with described sample circuit output terminal respectively, is used for sampled voltage operation amplifier and isolation to phase voltage sampling module (1); Three-phase voltage intersection point sampling module (3) comprises six sample circuits, and described sample circuit is used for obtaining the voltage signal of six intersection points of three-phase voltage in one-period; Shaping filter module (4) is used for analog level shaping, filtering behind the taking-up intersection point; Digital signal processor (5) is used for the signal output speed according to shaping filter module (4) transmission; Power module (6) is used to amplifier isolation module (2), three-phase voltage intersection point sampling module (3), shaping filter module (4), digital signal processor (5) that the voltage input is provided; It is characterized in that: may further comprise the steps: the three-phase output voltage signal that A) gathers generator by phase voltage sampling module (1); B) the three-phase voltage signal amplifier isolation of amplifier isolation module (2) to collecting; C) obtain the voltage signal of six intersection points of three-phase voltage in one-period by three-phase voltage intersection point sampling module (3); D) shaping filter module (4) is to taking out analog level shaping, the filtering behind the intersection point; E) digital signal processor (5) is according to the signal output speed behind the shaping filter.
7. the method for testing of a kind of state type electronic speed-determination device for generator according to claim 6, it is characterized in that: described step C adjusts amplitude the laggard line level conversion of voltage signal of obtaining six intersection points of three-phase voltage in one-period.
8. the method for testing of a kind of state type electronic speed-determination device for generator according to claim 7, it is characterized in that: described step C adopts light-coupled isolation to promote transmission speed after level conversion.
9. the method for testing of a kind of state type electronic speed-determination device for generator according to claim 6, it is characterized in that: described step D comprises: D1) input pulse; D2) regulating impulse; D3) reverse shaped pulse; D4) pulse bandwidth filtering; D5) output direct current.
10. the method for testing of a kind of state type electronic speed-determination device for generator according to claim 6, it is characterized in that: described step e comprises: E1) input direct-current; E2) simulating signal of input is carried out analog to digital conversion; E3) come output speed according to the digital signal input speed function after the conversion; E4) show rotating speed.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103675324A (en) * | 2013-12-13 | 2014-03-26 | 中国航空工业集团公司第六三一研究所 | Rotation speed measurement method with anti-shake function |
| CN110470857A (en) * | 2019-09-08 | 2019-11-19 | 陕西航空电气有限责任公司 | A kind of Rotating speed measring method suitable for aviation power system generator |
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| CN203337679U (en) * | 2013-06-08 | 2013-12-11 | 广东明阳龙源电力电子有限公司 | Static electronic speed measuring device for generator |
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| GB2371427A (en) * | 2000-10-19 | 2002-07-24 | Lg Electronics Inc | Speed control of synchronous reluctance motor |
| CN1481604A (en) * | 2000-12-18 | 2004-03-10 | ��ʽ���簲����� | Method for correcting estimate of speed of induction motor and its device |
| US20030009309A1 (en) * | 2001-07-06 | 2003-01-09 | Sang-Hoon Lee | Method of estimating speed of induction motor and magnetic flux of rotor |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103675324A (en) * | 2013-12-13 | 2014-03-26 | 中国航空工业集团公司第六三一研究所 | Rotation speed measurement method with anti-shake function |
| CN110470857A (en) * | 2019-09-08 | 2019-11-19 | 陕西航空电气有限责任公司 | A kind of Rotating speed measring method suitable for aviation power system generator |
| CN110470857B (en) * | 2019-09-08 | 2021-04-13 | 陕西航空电气有限责任公司 | Rotating speed detection method suitable for aviation power system generator |
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