CN117054707B - Low-attenuation-rate high-voltage broadband high-current generating device - Google Patents
Low-attenuation-rate high-voltage broadband high-current generating device Download PDFInfo
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- CN117054707B CN117054707B CN202311300450.8A CN202311300450A CN117054707B CN 117054707 B CN117054707 B CN 117054707B CN 202311300450 A CN202311300450 A CN 202311300450A CN 117054707 B CN117054707 B CN 117054707B
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- 230000003321 amplification Effects 0.000 claims abstract description 13
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 13
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- 239000003990 capacitor Substances 0.000 claims description 16
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 11
- 230000001939 inductive effect Effects 0.000 claims description 9
- 229910000889 permalloy Inorganic materials 0.000 claims description 9
- 239000004020 conductor Substances 0.000 claims description 6
- 238000012545 processing Methods 0.000 claims description 6
- 239000011229 interlayer Substances 0.000 claims description 3
- 238000004804 winding Methods 0.000 claims description 3
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- 229910002070 thin film alloy Inorganic materials 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/28—Provision in measuring instruments for reference values, e.g. standard voltage, standard waveform
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Abstract
The invention provides a low attenuation rate high-voltage broadband high-current generating device, which comprises: a broadband power source group, a broadband booster and a broadband booster; one end of the broadband power source group is connected with the broadband current booster and the broadband voltage booster, and the other end of the broadband power source group is connected with an external signal generator in a communication way; the broadband power source group is used for amplifying low-voltage weak current signals emitted by the signal generator into power signals with load capacity in equal proportion, and transmitting the power signals to the broadband current booster for current amplification to obtain broadband current; and the power signal is also used for transmitting the power signal to the broadband booster for voltage amplification to obtain broadband voltage. The invention designs a low attenuation rate high-voltage broadband high-current generating device which has the main functions of amplifying and outputting two paths of input analog signals into rated high voltage and high current according to a proportional relation, wherein the synchronous output of the voltage and the current is good.
Description
Technical Field
The invention belongs to the technical field of power supplies, and particularly relates to a low-attenuation-rate high-voltage broadband high-current generating device.
Background
The ground fault identification function test of the secondary fusion power distribution equipment is mainly characterized in that when the test is carried out, transient characteristic signals of small-current ground faults are required to be overlapped and output under the rated voltage and rated load current of 10kV when different system grounding modes, grounding resistances, fault types and fault angles are required to be carried out, and the existing test devices in the current market are all based on integrated high-voltage test power supplies, and the problems that the output high-voltage broadband transient waveform signals are easy to distort and the synchronous output performance of voltage and current is poor are solved.
The power supply is mainly formed by modifying a general principle based on a high-voltage test power supply in the prior art and is used for generating high-voltage and high-current signals of power frequency. And the conventional transformer and switch steady-state characteristic test, such as an accuracy test under a power frequency signal, is completed. The loading and the output of the non-power frequency signal waveform cannot be realized, so that the requirement of superposing and outputting transient characteristic waveforms of various small-current ground faults under the rated voltage and the current of a 10kV distribution line cannot be realized. The power supply output control mode is usually communication parameter control, and is characterized in that the power supply output control mode is communication parameter control, amplitude, phase and frequency control parameters are transmitted to a power supply through an upper computer or other control equipment, corresponding voltage and current signals are output inside the power supply according to input parameters, the output signals are voltage and current signals with fixed frequency and phase, and the output of non-power frequency signal waveforms cannot be realized.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides a low-attenuation-rate high-voltage broadband high-current generating device, which comprises:
a broadband power source group, a broadband booster and a broadband booster;
one end of the broadband power source group is connected with the broadband current booster and the broadband voltage booster, and the other end of the broadband power source group is connected with an external signal generator in a communication way;
the broadband power source group is used for amplifying low-voltage weak current signals emitted by the signal generator into power signals with load capacity in equal proportion, and transmitting the power signals to the broadband current booster for current amplification to obtain broadband current; and the power signal is also used for transmitting the power signal to the broadband booster for voltage amplification to obtain broadband voltage.
Preferably, the broadband booster includes: a booster low-voltage side, a booster high-voltage side and an iron core; the low-voltage side of the booster is wound on one side of the iron core, and the high-voltage side of the booster is wound on the other side of the iron core;
two ends of the low-voltage side of the booster are respectively connected with two ends of the broadband power source group to form a loop;
and the high-voltage side of the booster outputs broadband voltage outwards.
Preferably, the iron core is permalloy.
Preferably, the low-voltage side of the booster and the high-voltage side of the booster both comprise coils, the winding intervals of the coils are set according to preset interval values, and the interlayer intervals of the coils are set according to preset interval values.
Preferably, the broadband booster further comprises: one or more capacitive branches;
each capacitor branch is respectively connected with the low-voltage side of the booster in parallel;
each capacitive branch comprises a switch and a capacitor connected in series;
the switch is in communication connection with an external controller;
the switch is used for opening or closing according to the instruction of the controller;
the capacitor is used to capacitively compensate the broadband booster when the switch is closed.
Preferably, the broadband up-converter includes: a primary large current conductor, a magnetic core, and a coil wound around the magnetic core;
two ends of the coil are respectively connected with two ends of the broadband power source group to form a loop;
the primary large-current conductor passes through the magnetic core and outputs broadband current to the outside.
Preferably, the magnetic core includes: a plurality of permalloy sheets mounted together are combined.
Preferably, each permalloy sheet is different in cross-sectional area and structure.
Preferably, each permalloy sheet is cut into a saw-tooth structure at different pitches.
Preferably, the coil comprises a plurality of single coils stacked together.
Preferably, each single coil is hollow cylinder.
Preferably, the single coil comprises a complete single coil and single coils with different half-cut depths.
Preferably, the half-cut depth of the single coil includes: 4mm,6mm,8mm,10mm and 15mm.
Preferably, the broadband up-converter further comprises: one or more capacitive branches;
each capacitor branch is connected with the coil in parallel;
each capacitive branch comprises a switch and a capacitor connected in series;
the switch is in communication connection with an external controller;
the switch is used for opening or closing according to the instruction of the controller;
the capacitor is used to capacitively compensate for a broadband up-converter when the switch is closed.
Preferably, the power signal amplified by the broadband power source group ranges from 30Hz to 5KHz.
Compared with the closest prior art, the invention has the following beneficial effects:
the invention provides a low attenuation rate high-voltage broadband high-current generating device, which comprises: a broadband power source group, a broadband booster and a broadband booster; one end of the broadband power source group is connected with the broadband current booster and the broadband voltage booster, and the other end of the broadband power source group is connected with an external signal generator in a communication way; the broadband power source group is used for amplifying low-voltage weak current signals emitted by the signal generator into power signals with load capacity in equal proportion, and transmitting the power signals to the broadband current booster for current amplification to obtain broadband current; the power signal is also used for transmitting the power signal to the broadband booster for voltage amplification to obtain broadband voltage; the invention can amplify and output the input low-voltage weak current signal into rated broadband voltage and broadband current of the distribution network system according to the proportion relation, thereby realizing the output of non-power frequency signal waveforms; and the synchronous output of voltage and current is good.
Drawings
FIG. 1 is a schematic diagram of a low attenuation rate high voltage broadband high current generator according to the present invention;
FIG. 2 is a wiring diagram of a low attenuation rate high voltage broadband high current generator provided by the invention;
FIG. 3 is a schematic diagram of a broadband power source set in a low attenuation rate high voltage broadband high current generator according to the present invention;
FIG. 4 is a schematic diagram of a broadband booster in a low attenuation rate high voltage broadband high current generator according to the present invention;
FIG. 5 is a schematic diagram of a broadband current booster in a low attenuation rate high voltage broadband high current generator according to the present invention;
fig. 6 is an application block diagram of a three-phase high-voltage high-current generating device combined by three devices in an embodiment of a low-attenuation-rate high-voltage broadband high-current generating device provided by the invention.
Detailed Description
The following describes the embodiments of the present invention in further detail with reference to the drawings.
Example 1:
the invention provides a low attenuation rate high-voltage broadband high-current generating device, as shown in figure 1, comprising:
a broadband power source group, a broadband booster and a broadband booster;
the specific connection of the broadband power source group, the broadband booster and the broadband booster is shown in fig. 2:
one end of the broadband power source group is connected with the broadband current booster and the broadband voltage booster, and the other end of the broadband power source group is connected with an external signal generator in a communication way;
as shown in fig. 3, the broadband power source group amplifies the low-voltage weak current signal emitted by the signal generator into a power signal with load capacity in equal proportion, and transmits the power signal to the broadband current booster for current amplification to obtain broadband current; and the power signal is also used for transmitting the power signal to the broadband booster for voltage amplification to obtain broadband voltage.
Specifically, the broadband power source has a power amplification function, and can keep good amplification following effect on input signals with different frequency characteristics within the range of 30Hz-5KHz.
Specifically, unlike the conventional voltage regulator driven booster, the present invention adopts a broadband power source to drive booster. The conventional voltage regulator has the advantages that the input signal is a common power frequency power supply, the output signal is a common power frequency signal, the adjustment control of frequency and phase cannot be realized, and the output signal is single.
Specifically, the broadband power source input signal is a low-voltage weak current signal, the weak current signal can be derived from a signal generator or a DA (digital to analog) conversion circuit, an analog small signal with adjustable amplitude frequency and phase can be conveniently generated by using a digital circuit processing technology, and the broadband power source is used for amplifying the analog small signal into a power signal with load capacity in equal proportion and is used for driving the booster current booster.
Specifically, as shown in fig. 4, the broadband booster includes: a booster low-voltage side T1, a booster high-voltage side T2 and an iron core; the low-voltage side of the booster is wound on one side of the iron core, and the high-voltage side of the booster is wound on the other side of the iron core;
two ends of the low-voltage side of the booster are respectively connected with two ends of the broadband power source group to form a loop;
and the high-voltage side of the booster outputs broadband voltage outwards.
Specifically, the broadband booster adopts the bolo alloy with higher magnetic conductivity and wider frequency response range to replace the common silicon steel sheet, and adds a capacitive load in the boost control loop for compensating the inductive load in the load of the voltage transformer.
The broadband booster adopts the permalloy with higher magnetic conductivity and wider frequency response range to replace the common silicon steel sheet iron core, the winding interval of the booster coil is increased, the interlayer interval is increased, and the distributed capacitance of the coil is reduced. Capacitive load control is added to the boost control loop to compensate for inductive characteristics in the voltage transformer load. Wherein T1 is the low voltage side of the booster and T2 is the high voltage side of the booster. According to the size of the inductive load, the compensating capacitors C1, C2 and C3 can be partially or completely put into the circuit by controlling the on-off of the switching control devices K1, K2 and K3. Because the compensation capacitor is positioned at the low-voltage side, whether the capacitor is inserted into the booster loop can be conveniently controlled.
Specifically, as shown in fig. 5, the broadband current booster includes: a primary large current conductor, a magnetic core, and a coil wound around the magnetic core;
two ends of the coil are respectively connected with two ends of the broadband power source group to form a loop;
the primary large-current conductor passes through the magnetic core and outputs broadband current to the outside.
Specifically, the broadband current booster adopts the bolmo alloy with higher magnetic conductivity and wider frequency response range to replace the common silicon steel sheet, is structurally designed into a mode of penetrating one turn, is beneficial to reducing the insulation process requirement, and adds a capacitive load into the current boosting control loop to compensate the influence of inductive load in a high-current loop on the current boosting characteristic of the current booster.
Specifically, the broadband current booster adopts the Bomo alloy with higher magnetic conductivity and wider frequency response range to replace the common silicon steel sheet, and simultaneously designs the Bomo alloy into different sectional areas and different structures, and the Bomo alloy is cut into a saw-tooth structure according to different intervals and is assembled together to be used as a magnetic core of the current booster.
Specifically, according to the capacitive load in the broadband current booster, the on-off of the switch control devices K1, K2 and K3 is controlled to control the closing of the C1, C2 and C3, so that capacitance compensation is further performed.
Specifically, when the signal of the input side of the current booster is fixed, the wire diameters of the wires for outputting primary current of the current booster are different, the lengths are different, the number of current transformers connected to the primary wires is different, and the amplitude and the phase of the current output by the current booster are also different.
Specifically, the reference structure is dimensioned as described below. The film alloy structure is a hollow cylinder, and the structure size of a single coil is 130mm in outer diameter, 100mm in inner diameter and 30mm in height. In order to ensure enough magnetic flux, 10 coils are stacked together, and the structure can effectively avoid the phenomenon that the volume of a single coil is overlarge, and the thin film alloy inside the coil is cracked due to stress so as to influence the magnetic conductivity. 5 of the 10 coils are designed to be complete coils, the other 5 coils are respectively set to be different half-cutting depths, the inner design half-cutting depths are respectively 4mm,6mm,8mm,10mm and 15mm, the number of the serrated half-cutting is 4, and the positions are equally divided by the inner diameter equidistance.
Specifically, the current booster is structurally designed to be a through one-turn mode, so that the insulation process requirement is reduced, and a capacitive load is added into the current booster control loop to compensate the influence of inductive load in a high-current loop on the current booster characteristic. The number of capacitive loads in the control loop can be actively switched on or off according to the change of inductive loads in the primary current loop.
Specifically, as described above, the combination of the broadband power source, the broadband booster and the broadband current booster can form a high-voltage and high-current generating device, and the information such as amplitude, frequency, phase and the like of the output signal changes along with the input analog small signal, so that good signal following characteristics can be maintained.
Specifically, as shown in fig. 6, three devices are combined to form a three-phase high-voltage high-current generating device, and output signals are loaded to a tested article (switch or ring main unit), so that the requirement of the distribution automation equipment for carrying out a small-current ground fault recognition function test can be met.
Specifically, the low attenuation rate high-voltage broadband high-current generating device designed by the invention has the main functions of amplifying and outputting two paths of input analog quantity signals into rated high voltage and high current of a 10kV distribution network system according to a proportional relation, wherein the attenuation rate of non-power frequency components is low, and the synchronous output performance of voltage and current is good.
The low attenuation rate high-voltage broadband high-current generating device designed by the invention is used as a high-voltage high-power supply, and can be used for solving the requirement of an experimental power supply in a ground fault identification function test of a secondary integrated power distribution device. The output waveform has obvious high-frequency transient characteristics, can be output when the ground fault waveform is simulated under rated voltage and current conditions, has low attenuation rate of high-frequency components, high waveform fidelity and good synchronous output of zero sequence voltage and current, and can meet the requirement of the distribution automation equipment on carrying out a small-current ground fault identification function test. The ground fault identification function test method can be directly applied to ground fault identification function tests of secondary fusion power distribution equipment by matching with other control equipment.
The waveform of the actual fault of the power distribution network belongs to non-power frequency signals, the output signal of the experimental power supply needs to be responded quickly in a very short time, and the closed loop feedback regulation process of the experimental power supply is limited by the requirement of quick response. The low attenuation rate high-voltage broadband high-current generating device designed by the invention has the advantages that the signal input end is an analog signal, the input signal can be a power frequency signal and a non-power frequency signal, the output does not need closed-loop regulation, the quick response requirement can be realized, and the defect that the output of a general experimental power supply can only be a single frequency signal and the defect that the output needs closed-loop regulation is overcome.
It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It should be noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the scope of protection thereof, and although the present invention has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that various changes, modifications or equivalents may be made to the specific embodiments of the application after reading the present invention, and these changes, modifications or equivalents are within the scope of protection of the claims appended hereto.
Claims (13)
1. The utility model provides a low decay rate high pressure wide band heavy current generating device which characterized in that includes:
a broadband power source group, a broadband booster and a broadband booster;
one end of the broadband power source group is connected with the broadband current booster and the broadband voltage booster, and the other end of the broadband power source group is connected with an external signal generator in a communication way;
the broadband power source group is used for amplifying low-voltage weak current signals emitted by the signal generator into power signals with load capacity in equal proportion, and transmitting the power signals to the broadband current booster for current amplification to obtain broadband current; the power signal is also used for transmitting the power signal to the broadband booster for voltage amplification to obtain broadband voltage; the power signal amplified by the broadband power source group is in a range of 30Hz-5KHz and is used for keeping the amplification following of input signals with different frequency characteristics, and the input signals are low-voltage weak current signals;
the weak current signal is derived from a signal generator or a DA digital-to-analog conversion circuit, an analog small signal with adjustable amplitude, frequency and phase is generated by using a digital circuit processing technology, and the analog small signal is amplified into a power signal with load capacity by a broadband power source in equal proportion and is used for driving a booster current booster;
the broadband booster includes: a booster low-voltage side, a booster high-voltage side and an iron core; the low-voltage side of the booster is wound on one side of the iron core, and the high-voltage side of the booster is wound on the other side of the iron core;
two ends of the low-voltage side of the booster are respectively connected with two ends of the broadband power source group to form a loop;
the high-voltage side of the booster outputs broadband voltage outwards;
adding capacitive load control in the boost control loop for compensating an inductive load in the voltage transformer load;
wherein, according to the inductive load in the broadband booster, the on-off of the devices K1, K2 and K3 is controlled by controlling the switch, and partial or all compensation capacitors C1, C2 and C3 are put into to perform capacitance compensation;
adding capacitive load control in the current-rising control loop for compensating the influence of inductive load in the high-current loop on the current-rising characteristic of the current-rising device;
according to the capacitive load in the broadband current booster, the on-off control of the devices K1, K2 and K3 is controlled by the control switch to actively input or cut off the devices C1, C2 and C3, so that capacitance compensation is performed.
2. The apparatus of claim 1, wherein the core is permalloy.
3. The apparatus of claim 1, wherein the low voltage side of the booster and the high voltage side of the booster each include a coil, a winding interval of the coil is set at a preset interval value, and an inter-layer interval of the coil is set at a preset interval value.
4. The apparatus of claim 1, wherein the broadband booster further comprises: one or more capacitive branches;
each capacitor branch is respectively connected with the low-voltage side of the booster in parallel;
each capacitive branch comprises a switch and a capacitor connected in series;
the switch is in communication connection with an external controller;
the switch is used for opening or closing according to the instruction of the controller;
the capacitor is used to capacitively compensate the broadband booster when the switch is closed.
5. The apparatus of claim 1, wherein the broadband booster comprises: a primary large current conductor, a magnetic core, and a coil wound around the magnetic core;
two ends of the coil are respectively connected with two ends of the broadband power source group to form a loop;
the primary large-current conductor passes through the magnetic core and outputs broadband current to the outside.
6. The apparatus of claim 5, wherein the magnetic core comprises: a plurality of permalloy sheets mounted together are combined.
7. The device of claim 6, wherein each permalloy sheet has a different cross-sectional area and structure.
8. The device of claim 6, wherein each permalloy sheet is cut into a saw-tooth configuration at different pitches.
9. The apparatus of claim 5, wherein the coil comprises a plurality of single coils stacked together.
10. The apparatus of claim 9, wherein each of the single coils is configured as a hollow cylinder.
11. The apparatus of claim 9, wherein the single coil comprises a full single coil and a single coil of different half cut depths.
12. The apparatus of claim 11, wherein the half-cut depth of the single coil comprises: 4mm,6mm,8mm,10mm and 15mm.
13. The apparatus of claim 5, wherein the broadband up-converter further comprises: one or more capacitive branches;
each capacitor branch is connected with the coil in parallel;
each capacitive branch comprises a switch and a capacitor connected in series;
the switch is in communication connection with an external controller;
the switch is used for opening or closing according to the instruction of the controller;
the capacitor is used to capacitively compensate for a broadband up-converter when the switch is closed.
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| CN108710043A (en) * | 2018-06-28 | 2018-10-26 | 国家电网公司 | A kind of relay protection vector checkout facility device using freq-variable electronic pressure regulator |
| CN209400684U (en) * | 2018-11-20 | 2019-09-17 | 国家电网有限公司 | A kind of voltage transformer wideband error measuring system |
| CN111220861A (en) * | 2018-11-27 | 2020-06-02 | 西安交通大学 | Large-current generating circuit for MMC sub-module capacitor test |
| CN114019297A (en) * | 2021-09-26 | 2022-02-08 | 中国电力科学研究院有限公司 | Distribution line high-frequency transient characteristic signal generating device and control method thereof |
| CN114545068A (en) * | 2021-12-22 | 2022-05-27 | 云南电网有限责任公司电力科学研究院 | Portable 10kV three-phase broadband power standard equipment |
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