CN211856689U - Adjustable impulse voltage source - Google Patents
Adjustable impulse voltage source Download PDFInfo
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- CN211856689U CN211856689U CN202020378471.7U CN202020378471U CN211856689U CN 211856689 U CN211856689 U CN 211856689U CN 202020378471 U CN202020378471 U CN 202020378471U CN 211856689 U CN211856689 U CN 211856689U
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Abstract
The application discloses adjustable impulse voltage source, including direct current charging unit, energy storage unit, discharge unit, wave modulation unit and the control unit. The direct current charging unit is used for rectifying alternating current input by an alternating current power grid and outputting direct current voltage; the energy storage unit has variable capacity and outputs the voltage value of the energy storage unit; the signal input end of the control unit is connected with the voltage signal output end, and the control signal output end is configured to output a calibration control signal when the voltage value meets a preset standard; the discharge unit is respectively connected with the output end of the energy storage unit and the wave modulation unit and is used for changing the output end of the energy storage unit and the input end of the wave modulation unit from a normally open state to a conduction state based on the calibration control signal output by the control unit; the wave modulation unit is used for outputting impulse voltage which accords with the calibration standard to the equipment to be calibrated according to the circuit connection which is taught in advance when the electric energy is injected. Thereby enabling the user to utilize the surge voltage to perform waveform calibration on the device to be calibrated.
Description
Technical Field
The application relates to the technical field of high voltage detection, in particular to an adjustable impulse voltage source.
Background
The medium and high voltage equipment in the power system needs to be subjected to impulse voltage tests, and the waveforms, voltage amplitudes and time of the standard lightning impulse voltage and the operation impulse voltage of the tests need to meet the requirements of national standards. For this reason, the acquisition and measurement equipment and instruments required by the impulse voltage test need to be regularly calibrated to ensure the accuracy of the measured data.
In a high-voltage test, to ensure the accuracy of test data, waveform calibration of the acquisition and measurement device is particularly important, and in the waveform calibration, a surge voltage source is required to output a surge voltage meeting a calibration standard to the calibrated acquisition and measurement device.
SUMMERY OF THE UTILITY MODEL
In view of the above, the present application provides an adjustable impulse voltage source for providing impulse voltages according to corresponding parameters in calibrating a secondary acquisition device.
In order to achieve the above object, the following solutions are proposed:
an adjustable impulse voltage source comprises a direct current charging unit, an energy storage unit, a discharging unit, a wave modulation unit and a control unit, wherein:
the direct current charging unit is connected with an alternating current power grid, is used for carrying out constant current charging on the thyristor on the primary side of the transformer, automatically converts the polarity of charging voltage, and is provided with a rectifying module for converting alternating current into direct current to be output from a direct current output end; (ii) a
The input end of the energy storage unit is electrically connected with the direct current output end, the output end of the energy storage unit is electrically connected with the discharge unit, the energy storage unit has variable capacity and is provided with a voltage signal output end, and the voltage signal output end is used for outputting the voltage value of the energy storage unit;
the discharge unit is respectively connected with the output end of the energy storage unit, the input end of the wave modulation unit and the control signal output end of the control unit and is used for changing the output end of the energy storage unit and the input end of the wave modulation unit from a normally open state to a conduction state based on the calibration control signal output by the control unit;
the output end of the wave modulation unit is connected with the electrical input end of the equipment to be calibrated, and is used for outputting impulse voltage meeting the calibration standard to the equipment to be calibrated according to the pre-taught circuit connection when the electric energy is injected;
the signal input end of the control unit is connected with the voltage signal output end, and the control signal output end is configured to output the calibration control signal when the voltage value meets a preset standard.
Optionally, the energy storage unit includes normally closed switch, charging protection resistance, voltage detection circuit and main capacitor of adjustable capacity, wherein:
one end of the normally closed switch is connected with the positive electrode of the direct current output end, the other end of the normally closed switch is connected with one end of the charging protection resistor, and the normally closed switch is in signal connection with the control unit and is configured to be turned off when the control unit outputs the calibration control signal;
the other end of the charging protection resistor is connected with one end of the main capacitor;
the other end of the main capacitor is connected with the negative electrode of the direct current output end;
the voltage detection circuit is connected in parallel with the main capacitor and used for detecting the voltage of the main capacitor and outputting the voltage value to the control unit.
Optionally, the charging protection resistor is formed by inductively winding an enameled resistance wire.
Optionally, the main capacitor comprises a main capacitor branch and at least one auxiliary capacitor branch connected together in parallel, wherein:
the main capacitor branch comprises a first capacitor;
the auxiliary capacitance branch comprises a switching element and a second capacitor which are connected together in series.
Optionally, the first capacitor and the second capacitor are both high-stability ceramic capacitor elements.
Optionally, the voltage detection circuit includes a first voltage dividing resistor, a second voltage dividing resistor, and a digital voltmeter, where:
the first voltage dividing resistor is connected with one end of the main capacitor, the other end of the main capacitor is connected with the digital voltmeter and one end of the second voltage dividing resistor;
the other end of the second voltage-dividing resistor is connected with the other end of the main capacitor.
Optionally, the discharge unit includes a normally open discharge switch, wherein:
one end of the discharge switch is connected with the energy storage unit, the other end of the discharge switch is connected with the wave modulation unit, and the discharge switch is closed according to the calibration control signal, so that electric energy of the energy storage unit is injected into the wave modulation unit.
Optionally, the wave modulation unit includes a loop inductor, a loop resistor, a wave head resistor with an adjustable resistance, a discharge capacitor, and a wave tail resistor with an adjustable resistance, wherein:
one end of the loop inductor is connected with the anode of the output end of the energy storage unit, and the other end of the loop inductor is connected with one end of the loop resistor;
the other end of the loop resistor is connected with one end of the wave head resistor and one end of the wave tail resistor;
the other end of the wave head resistor is used as the anode of the output end of the wave modulating unit and is connected with one end of the discharging capacitor;
and the other end of the discharge capacitor is used as a cathode of the output end of the wave modulation unit and is connected with the other end of the wave tail resistor.
Optionally, the wave head resistor includes a first main resistor and at least one first auxiliary resistor connected in series, where:
each first auxiliary resistor is connected with a first short-circuit switch in parallel.
Optionally, the tail resistor includes a second main resistor and at least one second auxiliary resistor connected in series, where:
and each second auxiliary resistor is connected with a second short-circuit switch in parallel.
According to the technical scheme, the application discloses an adjustable impulse voltage source which comprises a direct current charging unit, an energy storage unit, a discharging unit, a wave modulation unit and a control unit. The direct current charging unit is used for rectifying alternating current input by an alternating current power grid and outputting direct current voltage; the energy storage unit has variable capacity and is provided with a voltage signal output end, and the voltage signal output end is used for outputting a voltage value of the energy storage unit; the signal input end of the control unit is connected with the voltage signal output end, and the control signal output end is configured to output a calibration control signal when the voltage value meets a preset standard; the discharge unit is respectively connected with the output end of the energy storage unit, the input end of the wave modulation unit and the control signal output end of the control unit and is used for changing the output end of the energy storage unit and the input end of the wave modulation unit from a normally open state to a conduction state based on the calibration control signal output by the control unit; the output end of the wave modulation unit is connected with the electrical input end of the equipment to be calibrated, and is used for outputting impulse voltage meeting the calibration standard to the equipment to be calibrated according to the pre-taught circuit connection when the electric energy is injected. Thereby enabling the user to utilize the surge voltage to perform waveform calibration on the device to be calibrated.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a block diagram of an adjustable impulse voltage source according to an embodiment of the present disclosure;
fig. 2 is a circuit diagram of an adjustable impulse voltage source according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Example one
Fig. 1 is a block diagram of an adjustable impulse voltage source according to an embodiment of the present disclosure.
As shown in fig. 1, the adjustable impulse voltage source provided by the present embodiment includes a dc charging unit 10, an energy storage unit 20, a discharging unit 30, a wave modulation unit 40, and a control unit 50.
The direct current charging unit is connected with an alternating current power grid, particularly used for carrying out constant current charging on a thyristor on the primary side of a transformer, automatically converting the polarity of charging voltage, and provided with a rectifying module for converting alternating current into direct current voltage. The voltage of the ac grid may be the supply voltage: 115V/230V (50/60 Hz).
The energy storage unit has variable capacity, is used for receiving direct current voltage injected by the direct current charging unit through the direct current input end of the energy storage unit through the input end of the energy storage unit, realizes energy storage through the energy storage element, and is connected with the discharging unit through the output end of the energy storage element. In addition, the energy storage unit can also detect the voltage of the electric energy stored deeply and output the voltage value of the stored electric energy to the control unit through the signal output end of the energy storage unit.
The control unit is used for receiving the voltage value and outputting a calibration control signal through the control signal output end when the voltage value reaches a preset standard.
The input end of the discharging unit is connected with the output end of the energy storage unit, the output end of the discharging unit is connected with the input end of the wave modulation unit and is connected with the control signal output end of the control unit, and when the control signal outputs the calibration control signal, the energy storage unit is electrically connected with the wave modulation unit, so that the electric energy stored by the energy storage unit is injected into the wave modulation unit through the discharging unit.
The wave modulation unit is provided with a resistor and a discharge capacitor, the circuit connection inside the wave modulation unit can be tuned in advance, and after the injected electric energy is received, the impulse voltage meeting the calibration standard is output to the equipment to be calibrated according to the circuit connection tuned in advance.
The parameters of the impulse voltage output by the wave modulation unit are as follows:
the amplitude range of the output voltage is 20-2000V, and the accuracy is 0.1 grade;
wave-chopping time-delay: (0.3 to 6.0) μ s continuous
Triggering time delay: -5 mus to +50 mus
Wavefront time: minimum 0.2 mus
Half peak time: 0.3-3500 mus
Waveform time accuracy: grade 0.5
Outputting a waveform: the voltage-variable circuit is adjustable within 0.2/20-250/3500 mu s, can generate 25 typical impulse voltage waveforms according to the tuned circuit connection, and covers the standard impulse waveforms specified in IEC 60060-1-2010 and GB/T16927.1-2011.
According to the technical scheme, the embodiment provides the adjustable impulse voltage source which comprises a direct current charging unit, an energy storage unit, a discharging unit, a wave modulation unit and a control unit. The direct current charging unit is used for rectifying alternating current input by an alternating current power grid and outputting direct current voltage; the energy storage unit has variable capacity and is provided with a voltage signal output end, and the voltage signal output end is used for outputting a voltage value of the energy storage unit; the signal input end of the control unit is connected with the voltage signal output end, and the control signal output end is configured to output a calibration control signal when the voltage value meets a preset standard; the discharge unit is respectively connected with the output end of the energy storage unit, the input end of the wave modulation unit and the control signal output end of the control unit and is used for changing the output end of the energy storage unit and the input end of the wave modulation unit from a normally open state to a conduction state based on the calibration control signal output by the control unit; the output end of the wave modulation unit is connected with the electrical input end of the equipment to be calibrated, and is used for outputting impulse voltage meeting the calibration standard to the equipment to be calibrated according to the pre-taught circuit connection when the electric energy is injected. Thereby enabling the user to utilize the surge voltage to perform waveform calibration on the device to be calibrated.
The specific circuit of the adjustable surge voltage source in the present application is shown in fig. 2.
The panel of the voltage source is provided with the extension unit which can be externally connected with a wave modulation element to achieve more accurate control of the waveform.
The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
While preferred embodiments of the present application have been described, additional variations and modifications of these embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including the preferred embodiment and all such alterations and modifications as fall within the true scope of the embodiments of the application.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or terminal that comprises the element.
The technical solutions provided by the present application are introduced in detail, and specific examples are applied in the description to explain the principles and embodiments of the present application, and the descriptions of the above examples are only used to help understanding the method and the core ideas of the present application; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.
Claims (10)
1. The adjustable impulse voltage source is characterized by comprising a direct current charging unit, an energy storage unit, a discharging unit, a wave modulation unit and a control unit, wherein:
the direct current charging unit is connected with an alternating current power grid and used for rectifying alternating current input by the alternating current power grid and outputting direct current voltage through a direct current output end;
the input end of the energy storage unit is electrically connected with the direct current output end, the output end of the energy storage unit is electrically connected with the discharge unit, the energy storage unit has variable capacity and is provided with a voltage signal output end, and the voltage signal output end is used for outputting the voltage value of the energy storage unit;
the discharge unit is respectively connected with the output end of the energy storage unit, the input end of the wave modulation unit and the control signal output end of the control unit and is used for changing the output end of the energy storage unit and the input end of the wave modulation unit from a normally open state to a conduction state based on the calibration control signal output by the control unit;
the output end of the wave modulation unit is connected with the electrical input end of the equipment to be calibrated, and is used for outputting impulse voltage meeting the calibration standard to the equipment to be calibrated according to the pre-taught circuit connection when the electric energy is injected;
the signal input end of the control unit is connected with the voltage signal output end, and the control signal output end is configured to output the calibration control signal when the voltage value meets a preset standard.
2. The adjustable surge voltage source of claim 1, wherein said energy storage unit comprises a normally closed switch, a charge protection resistor, a voltage detection circuit, and an adjustable capacity main capacitor, wherein:
one end of the normally closed switch is connected with the positive electrode of the direct current output end, the other end of the normally closed switch is connected with one end of the charging protection resistor, and the normally closed switch is in signal connection with the control unit and is configured to be turned off when the control unit outputs the calibration control signal;
the other end of the charging protection resistor is connected with one end of the main capacitor;
the other end of the main capacitor is connected with the negative electrode of the direct current output end;
the voltage detection circuit is connected in parallel with the main capacitor and used for detecting the voltage of the main capacitor and outputting the voltage value to the control unit.
3. An adjustable impulse voltage source as claimed in claim 2, characterized in that said charge protection resistor is inductively wound from an enamelled resistance wire.
4. An adjustable surge voltage source according to claim 2, wherein said main capacitor comprises a main capacitor branch and at least one auxiliary capacitor branch connected together in parallel, wherein:
the main capacitor branch comprises a first capacitor;
the auxiliary capacitance branch comprises a switching element and a second capacitor which are connected together in series.
5. An adjustable surge voltage source according to claim 4, wherein said first capacitor and said second capacitor are both high stability ceramic capacitive elements.
6. The adjustable surge voltage source of claim 2, wherein said voltage detection circuit comprises a first voltage divider resistor, a second voltage divider resistor, and a digital voltmeter, wherein:
the first voltage dividing resistor is connected with one end of the main capacitor, the other end of the main capacitor is connected with the digital voltmeter and one end of the second voltage dividing resistor;
the other end of the second voltage-dividing resistor is connected with the other end of the main capacitor.
7. The adjustable surge voltage source of claim 1, wherein said discharge cell comprises a normally-on discharge switch, wherein:
one end of the discharge switch is connected with the energy storage unit, the other end of the discharge switch is connected with the wave modulation unit, and the discharge switch is closed according to the calibration control signal, so that electric energy of the energy storage unit is injected into the wave modulation unit.
8. The adjustable surge voltage source of claim 1, wherein said wave modulating unit comprises a loop inductor, a loop resistor, a wave head resistor with adjustable resistance, a discharge capacitor, and a wave tail resistor with adjustable resistance, wherein:
one end of the loop inductor is connected with the anode of the output end of the energy storage unit, and the other end of the loop inductor is connected with one end of the loop resistor;
the other end of the loop resistor is connected with one end of the wave head resistor and one end of the wave tail resistor;
the other end of the wave head resistor is used as the anode of the output end of the wave modulating unit and is connected with one end of the discharging capacitor;
and the other end of the discharge capacitor is used as a cathode of the output end of the wave modulation unit and is connected with the other end of the wave tail resistor.
9. The adjustable surge voltage source of claim 8, wherein said ripple-head resistor comprises a first main resistor and at least one first auxiliary resistor connected in series, wherein:
each first auxiliary resistor is connected with a first short-circuit switch in parallel.
10. The adjustable surge voltage source of claim 8, wherein said tail resistor comprises a second main resistor and at least one second auxiliary resistor connected in series, wherein:
and each second auxiliary resistor is connected with a second short-circuit switch in parallel.
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| CN202020378471.7U CN211856689U (en) | 2020-03-23 | 2020-03-23 | Adjustable impulse voltage source |
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| CN202020378471.7U CN211856689U (en) | 2020-03-23 | 2020-03-23 | Adjustable impulse voltage source |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113009289A (en) * | 2021-02-01 | 2021-06-22 | 成都产品质量检验研究院有限责任公司 | Device and method for testing impulse voltage of photoelectric material and device |
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2020
- 2020-03-23 CN CN202020378471.7U patent/CN211856689U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113009289A (en) * | 2021-02-01 | 2021-06-22 | 成都产品质量检验研究院有限责任公司 | Device and method for testing impulse voltage of photoelectric material and device |
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Effective date of registration: 20210819 Address after: 710077 No. 18 West Second Ring Road, Shaanxi, Xi'an Patentee after: XI'AN HIGH VOLTAGE APPARATUS RESEARCH INSTITUTE Co.,Ltd. Address before: No.18, north section of West 2nd Ring Road, Lianhu District, Xi'an City, Shaanxi Province, 710077 Patentee before: XI'AN HIGH VOLTAGE APPARATUS RESEARCH INSTITUTE Co.,Ltd. Patentee before: CHINA XD ELECTRIC Co.,Ltd. |
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Address after: 710077 No. 18 West Second Ring Road, Shaanxi, Xi'an Patentee after: Xi'an High Voltage Electrical Apparatus Research Institute Co.,Ltd. Address before: 710077 No. 18 West Second Ring Road, Shaanxi, Xi'an Patentee before: XI'AN HIGH VOLTAGE APPARATUS RESEARCH INSTITUTE Co.,Ltd. |
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