CN203761271U - Broadband current-boosting device power supply - Google Patents
Broadband current-boosting device power supply Download PDFInfo
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- CN203761271U CN203761271U CN201420076661.8U CN201420076661U CN203761271U CN 203761271 U CN203761271 U CN 203761271U CN 201420076661 U CN201420076661 U CN 201420076661U CN 203761271 U CN203761271 U CN 203761271U
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- current
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- lifting device
- chip microcomputer
- voltage
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Abstract
The utility model relates to a broadband current-boosting device power supply comprising a rectification filtering module, an inversion filtering module, a single-chip microcomputer used for core control, a D/A conversion module, a pulse width modulation voltage-stabilizing circuit module used for modulating broadband high-current output, a voltage sampling circuit which is connected between the single-chip microcomputer and the input end of a current-boosting device in a feedback way and used for acquiring input voltage of the current-boosting device, and a current sampling circuit which is connected between the single-chip microcomputer and the output end of the current-boosting device in the feedback way and used for acquiring output current of the current-boosting device. The output end of the pulse width modulation voltage-stabilizing circuit module is electrically connected with the input end of the inversion filtering module. On the basis of pulse width modulation voltage stabilization control, the single-chip microcomputer is adopted, a current boosting effect is achieved via adjustment of output current of the current-boosting device, and an objective of current stabilization is achieved via feedback of input voltage of the current-boosting device and feedback of output current of the current-boosting device. Compared with conventional current-boosting devices, work efficiency is high, output current is stable, measuring accuracy is high, frequency range is wide and repeatability is great.
Description
Technical field
The utility model relates to automation control and high-voltage testing equipment field, is specifically related to a kind of broadband up-flow device power supply.
Background technology
Electromagnetic current transducer is the key equipment in electric power system, operate in all the year round in electrical network, supply harmonic is very harmful to electromagnetic current transducer, harmonic current increases the copper loss of current transformer, accelerate its aging or damage, can have a strong impact on the normal operation of equipment, even very dangerous explosion phenomenon can occur.If can apply to electromagnetic current transducer the electric current of different frequency, analyze the error characteristics of current transformer under different frequency, and then analyze the harm of harmonic wave to current transformer, and prevented, can avoid causing more serious consequence.
Current lifting device is also strong current generator, and in electric power system, technical staff often adopts current lifting device to check current transformer, is about to current lifting device cut-in operation power supply, by adjusting voltage regulator output voltage to obtain the required large electric current of test.Owing to being subject to technical limitations, current lifting device output current is often stable not, and reference frequency output is narrower, does not often reach good test effect.
Summary of the invention
The purpose of this utility model is to provide and a kind ofly wideband input signal is provided and can regulates and the current lifting device power supply of stable current lifting device output current.
For achieving the above object, the technical solution adopted in the utility model is: a kind of broadband up-flow device power supply, it comprises for interchange AC voltage input signal being converted to the rectification filtering module of direct voltage output, be electrically connected for d. c. voltage signal being converted to the inversion filtration module of setpoint frequency AC signal with described rectification filtering module output, described inversion filter module output and current lifting device are electrically connected, described current lifting device and current transformer to be measured are electrically connected, it also comprises the single-chip microcomputer of controlling for core, the D/A modular converter being electrically connected with described single-chip microcomputer output, be electrically connected for modulating the pulse width modulated voltage regulator circuit module of wideband High-current output with described D/A modular converter output, feedback link between described single-chip microcomputer and current lifting device input for gathering the voltage sample circuit of current lifting device input voltage, feedback link between described single-chip microcomputer and current lifting device output for gathering the current sampling circuit of current lifting device output current, described pulse width modulated voltage regulator circuit module output and described inversion filter module input are electrically connected.
Optimally, described pulse width modulated voltage regulator circuit module is SPWM modulation, and it is mainly comprised of triangle wave generating circuit, Sine Modulated wave generation circuit and comparator.
Optimally, described D/A modular converter comprises DDS circuit and the D/A circuit for common regulation and control pulse width modulated voltage regulator circuit module output waveform pulsewidth and frequency.
Optimally, described inversion filtration module is that IGBT drives inversion filtration module.
Optimally, it also comprises the liquid crystal display showing for voltage, electric current.
Optimally, described single-chip microcomputer is realized described current lifting device up-flow, the control of current stabilization based on pid algorithm.
Because technique scheme is used, the utility model compared with prior art has following advantages: the utility model adopts single-chip microcomputer, and control based on pulse-width modulation voltage stabilizing, regulate on the one hand the output current of current lifting device, reach the effect of up-flow, by input voltage feedback and the current lifting device output current of current lifting device are fed back, realize the object of current stabilization on the other hand.It is higher than traditional current lifting device operating efficiency, outputting current steadily, and certainty of measurement is high, and wide frequency range is reproducible.The utility model up-flow power supply can directly be exported the sine voltage of 30Hz～2500Hz, 0～150V, except the harmonic wave testing experiment for current transformer, can also for other, need to use the test occasion of frequency conversion voltage adjusting power supply to use.
Accompanying drawing explanation
Accompanying drawing 1 is the utility model current lifting device power principle block diagram;
Accompanying drawing 2 is pulse width modulated voltage regulator circuit module principle block diagram;
Accompanying drawing 3 is based on pid algorithm up-flow, current stabilization flow chart;
Wherein: 1, rectification filtering module; 2, inversion filtration module; 3, current lifting device 4, sample; 5, single-chip microcomputer; 6, D/A modular converter; 7, pulse width modulated voltage regulator circuit module; 8, voltage sample circuit; 9, current sampling circuit; 10, display.
Embodiment
In order to make those skilled in the art understand better content of the present utility model, below in conjunction with drawings and embodiments, the utility model is made to a nearly step and describe in detail.
Current lifting device power supply as shown in Figure 1, it comprises rectification filtering module 1, inversion filtration module 2, single-chip microcomputer 5, D/A modular converter 6, pulse width modulated voltage regulator circuit module 7, voltage sample circuit 8, current sampling circuit 9, wherein, rectification filtering module 1 input is connected with AC alternating current, its output and inversion filtration module 2 are electrically connected, the output of inversion filtration module 2 is connected with current lifting device 3, when needs are current transformer teacher of the testing to sample 4, current lifting device 3 outputs and sample 4 are joined.Single-chip microcomputer 5, D/A modular converter 6, pulse width modulated voltage regulator circuit module 7 outputs are electrically connected successively, and pulse width modulated voltage regulator circuit module 7 outputs are connected with inversion filtration module 2 inputs, thereby single-chip microcomputer 5, D/A modular converter 6, pulse width modulated voltage regulator circuit module 7, inversion filtration module 2, current lifting device 3 and sample 4 form main control circuit.Voltage sample circuit 8 feedback links are between single-chip microcomputer 5 and current lifting device 3 inputs, and current sampling circuit 9 feedback links are between single-chip microcomputer 5 and current lifting device 3 outputs.
In the present embodiment, inversion filtration module 2 adopts IGBT (Insulated Gate Bipolar Transistor, insulated gate bipolar transistor) to drive, and pulse width modulated voltage regulator circuit module 7 adopts SPWM modulation technique.Specific works principle is:
Exchange AC voltage signal and become direct current signal after rectification filtering module 1, export to IGBT pulse-width adjustment inversion filtration module 2, single-chip microcomputer 5 requires to export digital controlled signal to D/A modular converter 6 according to setting, analog control signal after 6 conversions of D/A modular converter enters SPWM pulse width modulated voltage regulator circuit module 7, pulse-width modulation circuit produces the SPWM ripple that can change frequency, frequency range is at 30Hz～2500Hz, and export to IGBT pulse-width adjustment inversion filtration module 2, this signal drives through IGBT, pass through again bridge type inverse, isolation transformation and filtering export current lifting device 3 to, thereby current lifting device 3 can be realized the output of wide electric current tested current transformer etc. is detected.In current lifting device power supply running, single-chip microcomputer 5 also can carry out according to the current lifting device output current feedback signal of the current lifting device input voltage feedback signal of voltage sample circuit 8 outputs and current sampling circuit 9 outputs the current stabilization control of current lifting device.Concrete control principle is as follows:
First, based on SPWM, pulse-width modulation realizes the control that wideband is exported.As shown in Figure 2, it adopts analog circuit to form triangular wave carrier circuit and Sine Modulated wave generation circuit, determines their intersection point with comparator, the conversion of constantly exporting low and high level at intersection point, thus generate SPWM ripple.DDS (Direct Digital Synthesizer) circuit and D/A control circuit regulate sinusoidal wave frequency and amplitude, regulate pulsewidth and the frequency of SPWM ripple.SPWM composite part is to compare with triangular wave with sinusoidal wave, and sine wave is greater than the part of triangular wave, is output as positive pulse, is less than part output negative pulse, and synthetic SPWM ripple enters IGBT and drives.
Control to up-flow, current stabilization, the present embodiment adopts pid algorithm.Fig. 3 realizes the flow chart of up-flow, current stabilization with pid algorithm.The stabling current I of the final output of current lifting device
odepend on the direct voltage of D/A output, and this voltage is determined to 16 bit X of D/A circuit input by single-chip microcomputer.Theoretically, after the hardware parameter of system is established, the high pressure I to each setting
o, its corresponding D/A input X also should determine.
Pid algorithm up-flow and current stabilization stage, the value that increases progressively each time Δ X is calculated by pid algorithm.
If default output current value is I
os; In working control process, output current sampled value is I
oi; Front twice output current sampled value is respectively: I
oi-1i
oi-2.Can calculated difference be:
ei＝I
os-I
oi；
Δei＝ei-ei-1＝I
oi-1-I
oi；
Δ2ei＝Δei-Δei-1＝2I
oi-1-I
oi-I
oi-2。
By pid algorithm, can be calculated:
ΔX
i+1＝ΔX
i+K(Δei+I
ei+DΔ2ei)。
Δ X wherein
i+ 1 for inputting the data increment of D/A, Δ X
ifor the front data increment of once inputting D/A.In superincumbent expression formula, K, I, D are respectively proportionality coefficient, integral coefficient and differential coefficient, and the size of its value is according to the situation adjustment of real system.
Enter pid algorithm boost phase, the Δ X in above formula
iinitial value be exactly the Δ X of previous stage
o, along with the rising increment value Δ X of voltage
i+1more and more less, boost stable after this value be 0.The time interval that at every turn increases progressively input D/A data X in PID control procedure is also a very important parameter, the size in this time interval depends on such three factors: D/A data are input to slow Henan time, the hardware parameter of system and the pressure rising time that software sets of stable high voltage output, and the size of its value is according to the situation adjustment of real system.
Fig. 3 is up-flow, current stabilization flow chart, and the calculating at the beginning of program is also given corresponding register assignment parameter, and these parameters are used in the process of boosting, as Δ X
o, PID COEFFICIENT K, P, I, D etc.While starting up-flow, to D/A, input Δ X
o, when hardware designs, the register in D/A chip is designed to the unit of the outer data storage of monolithic Bigpian, therefore, as long as carry out the outer data storage instruction of access sheet, just can transmit data to D/A chip.With pid algorithm, calculate Δ X at every turn
i+1, then be input in D/A and go, export corresponding electric current, until output current reaches setting electric current.Reaching the right double counting Δ of current setting value successor X
i+1make outputting current steadily in set point.
To sum up, the utility model current lifting device power acquisition is controlled with the voltage stabilizing of SPWM pulsewidth, regulate on the one hand current lifting device output current, on the other hand, the current stabilization that input voltage feedback by current lifting device and current lifting device output current FEEDBACK CONTROL realize current lifting device, it is higher than traditional current lifting device operating efficiency, and output current is more stable, certainty of measurement is higher, and frequency range is wider.The power supply instrument that adopts technical solutions of the utility model to make can also increase manual test and autorun, a tractor serves several purposes.And it can adopt display 10 operation and control interfaces, external mini-printer etc., facilitate Site Detection to use.
The utility model current lifting device power supply can directly be exported the sine voltage of 30Hz～2500Hz, 0～150V, so except the harmonic wave testing experiment for current transformer (CT), can also need to use the test occasion of frequency conversion voltage adjusting power supply to use for other.
Above-described embodiment is only explanation technical conceive of the present utility model and feature, and its object is to allow person skilled in the art can understand content of the present utility model and implement according to this, can not limit protection range of the present utility model with this.All equivalences of doing according to the utility model Spirit Essence change or modify, within all should being encompassed in protection range of the present utility model.
Claims (6)
1. a broadband up-flow device power supply, it comprises for interchange AC voltage input signal being converted to the rectification filtering module of direct voltage output, be electrically connected for d. c. voltage signal being converted to the inversion filtration module of setpoint frequency AC signal with described rectification filtering module output, described inversion filter module output and current lifting device are electrically connected, described current lifting device and current transformer to be measured are electrically connected, it is characterized in that: it also comprises the single-chip microcomputer of controlling for core, the D/A modular converter being electrically connected with described single-chip microcomputer output, be electrically connected for modulating the pulse width modulated voltage regulator circuit module of wideband High-current output with described D/A modular converter output, feedback link between described single-chip microcomputer and current lifting device input for gathering the voltage sample circuit of current lifting device input voltage, feedback link between described single-chip microcomputer and current lifting device output for gathering the current sampling circuit of current lifting device output current, described pulse width modulated voltage regulator circuit module output and described inversion filter module input are electrically connected.
2. a kind of broadband up-flow device power supply according to claim 1, is characterized in that: described pulse width modulated voltage regulator circuit module is SPWM modulation, and it is mainly comprised of triangle wave generating circuit, Sine Modulated wave generation circuit and comparator.
3. a kind of broadband up-flow device power supply according to claim 1 and 2, is characterized in that: described D/A modular converter comprises DDS circuit and the D/A circuit for common regulation and control pulse width modulated voltage regulator circuit module output waveform pulsewidth and frequency.
4. a kind of broadband up-flow device power supply according to claim 1, is characterized in that: described inversion filtration module is that IGBT drives inversion filtration module.
5. a kind of broadband up-flow device power supply according to claim 1, is characterized in that: it also comprises the liquid crystal display showing for voltage, electric current.
6. a kind of broadband up-flow device power supply according to claim 1, is characterized in that: described single-chip microcomputer is realized described current lifting device up-flow, the control of current stabilization based on pid algorithm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420076661.8U CN203761271U (en) | 2014-02-24 | 2014-02-24 | Broadband current-boosting device power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420076661.8U CN203761271U (en) | 2014-02-24 | 2014-02-24 | Broadband current-boosting device power supply |
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| Publication Number | Publication Date |
|---|---|
| CN203761271U true CN203761271U (en) | 2014-08-06 |
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ID=51256503
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|---|---|---|---|
| CN201420076661.8U Expired - Fee Related CN203761271U (en) | 2014-02-24 | 2014-02-24 | Broadband current-boosting device power supply |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103812354A (en) * | 2014-02-24 | 2014-05-21 | 苏州科技学院 | Broadband strong current generator power supply |
| CN112505575A (en) * | 2020-11-26 | 2021-03-16 | 云南电网有限责任公司电力科学研究院 | Broadband adjustable high-voltage test power supply system |
-
2014
- 2014-02-24 CN CN201420076661.8U patent/CN203761271U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103812354A (en) * | 2014-02-24 | 2014-05-21 | 苏州科技学院 | Broadband strong current generator power supply |
| CN112505575A (en) * | 2020-11-26 | 2021-03-16 | 云南电网有限责任公司电力科学研究院 | Broadband adjustable high-voltage test power supply system |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140806 Termination date: 20160224 |