CN108957085A - High-voltage detecting device - Google Patents
High-voltage detecting device Download PDFInfo
- Publication number
- CN108957085A CN108957085A CN201810837956.5A CN201810837956A CN108957085A CN 108957085 A CN108957085 A CN 108957085A CN 201810837956 A CN201810837956 A CN 201810837956A CN 108957085 A CN108957085 A CN 108957085A
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- voltage
- detecting device
- resistance
- lateral coil
- coil
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/04—Voltage dividers
- G01R15/06—Voltage dividers having reactive components, e.g. capacitive transformer
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
Abstract
A kind of high-voltage detecting device, for the short-circuit protection of high-voltage electric power system instrument, described device includes: voltage-limiting element, and one end is used to couple with high-tension line, and the other end is grounded by high pressure lateral coil；Voltage grading resistor, for coupling the low-voltage side coil coupled with the high pressure lateral coil between the both ends of the input resistance as voltage transformer and the voltage grading resistor.High-voltage detecting device provided by the invention, for overcoming the problems, such as the damage of high-voltage arm device electromagnetic potential transformer institute configuration load after short circuit occurs.
Description
Technical field
The present invention relates to electronic technology fields, in particular to a kind of high-voltage detecting device.
Background technique
10kv high-voltage electricity electromagnetic type voltage transformer uses more in the power system, and volume is big, quality weight, it is difficult to adapt to
The demand of automation.
Existing electromagnetic potential transformer reduces its sampled voltage in proportion, such as the electric resistance partial pressure of Fig. 1 or such as Fig. 2
Capacitance partial pressure mode.
Fig. 1 and Fig. 2 is please referred to, the voltage of high-voltage arm device (Ra, Ca) is much larger than low-voltage arm device (Rb, Cb)；Low-voltage arm
Input terminal of the voltage of device (Rb, Cb) as electromagnetic potential transformer.If when high-voltage arm device (Ra, Ca) is abnormal as short
Road, then can low-voltage arm device (Rb, Cb) overtension, cause electromagnetic potential transformer connection load damage.
Summary of the invention
The embodiment of the present invention at least provides a kind of high-voltage detecting device, for overcoming high-voltage arm device electricity after short circuit occurs
The damage problem of electromagnetic type voltage transformer institute configuration load.The specific implementation of above-described embodiment, as described below.
Described device includes:
Voltage-limiting element, one end are used to couple with high-tension line, and the other end is grounded by high pressure lateral coil；
Voltage grading resistor, for being coupled between the both ends of the input resistance as voltage transformer and the voltage grading resistor
The low-voltage side coil coupled with the high pressure lateral coil.
In preferred embodiments of the present invention, described device includes:
Sampling unit acquires the sampled voltage of the voltage-limiting element or high pressure lateral coil；
Control unit adjusts the resistance value of the voltage grading resistor according to the sampled voltage.
In preferred embodiments of the present invention, the partial pressure resistance device includes at least two divider resistances being sequentially connected in series, and is appointed
It anticipates and is grounded by a switch element between the adjacent divider resistance；
Described control unit respectively drives the on or off of all switch units according to the sampled voltage.
In preferred embodiments of the present invention, the sampling unit includes sampling lateral coil, the sampling lateral coil coupling
The high pressure lateral coil and/or the low-voltage side coil generate sampled voltage.
In preferred embodiments of the present invention, described device includes:
Signal processing unit, to output control signal after sampled voltage rectification and A/D conversion；
Control unit, according to the resistance value of voltage grading resistor described in the control Signal Regulation.
In preferred embodiments of the present invention, the signal processing unit includes:
Rectification circuit rectifies the sampled voltage；
A/D conversion circuit, A/D convert the sampled voltage after rectification as the control signal of digital quantity.
In preferred embodiments of the present invention, the rectification circuit includes:
Filter circuit, the sampled voltage after stablizing rectification, exports the stabilization signal of analog quantity；
A/D conversion circuit, the stabilization signal of A/D modulus of conversion analog quantity are the control signal of digital quantity.
In preferred embodiments of the present invention, the rectification circuit includes:
First diode, positive one end with the low-voltage side coil couple, and cathode couples the input of the filter circuit
End；
The other end of second diode, positive first diode opposite with the low-voltage side coil is coupled and is grounded, cathode
It is coupled with the cathode of the first diode.
In preferred embodiments of the present invention, described control unit includes:
Single-chip microcontroller is configured to receive the control signal and described in driving at least one according to the size of the control signal
The on or off of switch element.
Another embodiment of the present invention at least discloses a kind of high-voltage detecting device, and described device includes:
Voltage-limiting element, one end are used to couple with high-tension line, and the other end is grounded by high pressure lateral coil；
Voltage grading resistor couples the low-voltage side coil coupled with the high pressure lateral coil between both ends；
Electromagnetic transformer, both ends are coupled with the low-voltage side coil respectively.
For above scheme, the present invention is by being referring to the drawings described in detail disclosed exemplary embodiment, also
The other feature and its advantage for making the embodiment of the present invention understand.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 is one circuit diagram of embodiment；
Fig. 2 is the circuit diagram of two low-pressure side of embodiment；
Fig. 3 is the circuit diagram that embodiment one samples side；
Fig. 4 is the circuit diagram that embodiment one samples side.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.The present invention being usually described and illustrated herein in the accompanying drawings is implemented
The component of example can be arranged and be designed with a variety of different configurations.
Therefore, the detailed description of the embodiment of the present invention provided in the accompanying drawings is not intended to limit below claimed
The scope of the present invention, but be merely representative of selected embodiment of the invention.Based on the embodiments of the present invention, this field is common
Technical staff's every other embodiment obtained without creative efforts belongs to the model that the present invention protects
It encloses.
In the present invention unless specifically defined or limited otherwise, fisrt feature second feature "upper" or "lower"
It may include that the first and second features directly contact, also may include that the first and second features are not direct contacts but pass through it
Between other characterisation contact.Moreover, fisrt feature includes the first spy above the second feature " above ", " above " and " above "
Sign is right above second feature and oblique upper, or is merely representative of first feature horizontal height higher than second feature.Fisrt feature exists
Second feature " under ", " lower section " and " following " include that fisrt feature is directly below and diagonally below the second feature, or is merely representative of
First feature horizontal height is less than second feature.
Embodiment one
The present embodiment at least provides a kind of high-voltage detecting device, for the negative of short-circuit protection coupling electromagnetic potential transformer
It carries, it is specific as follows.
Referring to FIG. 1, the device of the present embodiment includes at least the high pressure lateral coil L1 and low-voltage side coil L2, electricity being coupled
Hinder R1 and resistance R2.One end of resistance R1 and high-tension line couple, and the other end is grounded by high pressure lateral coil L1.The two of resistance R2
End is coupled with the side of the same name of low-voltage side coil L2 relatively high pressure lateral coil L1 respectively.The both ends of resistance R2 are electric with electromagnetic type respectively
Press the both ends coupling of first siding ring in mutual inductor.
So, after the resistance R1 of voltage-limiting element is extremely short-circuit the maximum pressure drop of resistance R2 be high-tension line total voltage phase
To two coil ratios.The device of the present embodiment can be realized the isolation to high-tension line where resistance R1, while reduce resistance
The maximum pressure drop that R2 is born guarantees that the connect instrument of electromagnetic potential transformer always works in the range of nominal tension.
Embodiment two
The present embodiment at least separately provides a kind of high-voltage detecting device, including high pressure lateral coil L1, the low pressure side line being coupled
Enclose L2 and sampling lateral coil L3.
The one end for please referring to Fig. 2 and Fig. 3 high pressure lateral coil L1 is coupled by resistance R1 and 10KV high-tension line, another termination
Ground.The both ends of low-voltage side coil L2 are coupled by concatenated resistance R3, resistance R4 and resistance R5, and resistance R4 and resistance R5 it
Between coupled by bidirectional triode thyristor Q1 after be grounded and the input terminal as electromagnetic potential transformer, resistance R3 and resistance R4 it
Between another input terminal as electromagnetic potential transformer.Resistance R5 and low-voltage side coil L2 indirectly.
So, when the present embodiment bidirectional triode thyristor Q1 is turned off, using resistance R4 and resistance R5 as electromagnetic potential transformer
Input resistance, resistance R3 divides resistance R4 and resistance R5；When bidirectional triode thyristor Q1 is connected, resistance R4 is as electromagnetic type
The input resistance of voltage transformer, resistance R3 divide resistance R4.
Through the above scheme, the range of the present embodiment extension instrument can be controlled, and prevent from transfiniting；Specifically in resistance
After R1 short circuit, by controlling the conducting of bidirectional triode thyristor Q1, subtract the input resistance of electromagnetic potential transformer compared to resistance R3
It is small, the pressure drop of input resistance is reduced, realizes and the instrument range connecting with electromagnetic potential transformer is expanded.
Fig. 3 and Fig. 4 specifically are please referred to, the control of the present embodiment bidirectional triode thyristor Q1 is as follows.
Endpoint P1, P2 of the sampling lateral coil L3 of the present embodiment is coupled through signal processing unit and control unit.At signal
Reason unit handles the sampled voltage of sampling lateral coil L3 acquisition, generates control signal.Control unit is according to control signal
Two-way controllable cabinet silicon Q1 is controlled by exit point P3.
Signal processing unit includes rectification circuit, filter circuit and A/D conversion circuit.
Specifically, rectification circuit includes diode D1 and diode D2, the anode coupling of endpoint P1 and diode D1, diode
The cathode of D1 and the anode of diode D2 couple, the coupling of the endpoint P2 of the cathode and sampling lateral coil L3 of diode D2.
Filter circuit includes capacitor C1, and the anode of capacitor C1 is coupled with the cathode of diode D1, and cathode and endpoint P2 are coupled.
Through the above scheme, after the present embodiment rectifies sampled voltage by diode D1 and diode D2, by electricity
Hold C1 to be filtered the sampled voltage of rectification, generates the stabilization signal of analog quantity.
A/D conversion circuit carries out analog-to-digital conversion to stabilization signal, generates the control signal of digital quantity.
Single-chip microcontroller as control unit combines basic peripheral circuit, judges control signal.Believed according to control
Number size control endpoint P3 output high level or low level；Single-chip microcontroller is after control signal increases above the threshold value of inner setting
It then controls and exports high level as the endpoint P3 of output pin, make the bidirectional triode thyristor conducting as switch original part, and then to electricity
The pressure drop of the input resistance of electromagnetic type voltage transformer is reduced, and the range with electromagnetic potential transformer coupling instrument is expanded.
In addition, the present embodiment demonstration discloses a kind of high pressure check device, including voltage-limiting element, one end is used for and high-voltage line
Road coupling, the other end are grounded by high pressure lateral coil；Voltage grading resistor, for the input resistance as voltage transformer and described
The low-voltage side coil coupled with the high pressure lateral coil is coupled between the both ends of voltage grading resistor.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of high-voltage detecting device, the short-circuit protection for high-voltage electric power system instrument, which is characterized in that described device packet
It includes:
Voltage-limiting element, one end are used to couple with high-tension line, and the other end is grounded by high pressure lateral coil；
Voltage grading resistor, for coupling and institute between the both ends of the input resistance as voltage transformer and the voltage grading resistor
State the low-voltage side coil of high pressure lateral coil coupling.
2. high-voltage detecting device according to claim 1, which is characterized in that described device includes:
Sampling unit acquires the sampled voltage of the voltage-limiting element or high pressure lateral coil；
Control unit adjusts the resistance value of the voltage grading resistor according to the sampled voltage.
3. high-voltage detecting device according to claim 2, which is characterized in that partial pressure resistance device includes at least two successively
Concatenated divider resistance is grounded between the divider resistance of arbitrary neighborhood by a switch element；
Described control unit respectively drives the on or off of all switch units according to the sampled voltage.
4. high-voltage detecting device according to claim 2, which is characterized in that the sampling unit includes sampling lateral coil,
The sampling lateral coil couples the high pressure lateral coil and/or the low-voltage side coil, generates sampled voltage.
5. high-voltage detecting device according to claim 2, which is characterized in that described device includes:
Signal processing unit, to output control signal after sampled voltage rectification and A/D conversion；
Control unit, according to the resistance value of voltage grading resistor described in the control Signal Regulation.
6. high-voltage detecting device according to claim 5, which is characterized in that the signal processing unit includes:
Rectification circuit rectifies the sampled voltage；
A/D conversion circuit, A/D convert the sampled voltage after rectification as the control signal of digital quantity.
7. high-voltage detecting device according to claim 6, which is characterized in that the rectification circuit includes:
Filter circuit, the sampled voltage after stablizing rectification, exports the stabilization signal of analog quantity；
A/D conversion circuit, the stabilization signal of A/D modulus of conversion analog quantity are the control signal of digital quantity.
8. high-voltage detecting device according to claim 6, which is characterized in that the rectification circuit includes:
First diode, positive one end with the low-voltage side coil couple, and cathode couples the input terminal of the filter circuit；
The other end of second diode, positive first diode opposite with the low-voltage side coil is coupled and is grounded, cathode and institute
State the cathode coupling of first diode.
9. high-voltage detecting device according to claim 6, which is characterized in that described control unit includes:
Single-chip microcontroller is configured to receive the control signal and drives at least one described switch according to the size of the control signal
The on or off of element.
10. a kind of high-voltage detecting device, which is characterized in that described device includes:
Voltage-limiting element, one end are used to couple with high-tension line, and the other end is grounded by high pressure lateral coil；
Voltage grading resistor couples the low-voltage side coil coupled with the high pressure lateral coil between both ends；
Electromagnetic transformer, both ends are coupled with the low-voltage side coil respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810837956.5A CN108957085A (en) | 2018-07-26 | 2018-07-26 | High-voltage detecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810837956.5A CN108957085A (en) | 2018-07-26 | 2018-07-26 | High-voltage detecting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108957085A true CN108957085A (en) | 2018-12-07 |
Family
ID=64464129
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810837956.5A Pending CN108957085A (en) | 2018-07-26 | 2018-07-26 | High-voltage detecting device |
Country Status (1)
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| CN (1) | CN108957085A (en) |
Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1269893A (en) * | 1997-09-08 | 2000-10-11 | 西门子公司 | Circuit arrangement and method for protecting control element against overcurrent |
| US20060001493A1 (en) * | 2004-07-02 | 2006-01-05 | Infineon Technologies Fiber Optics Gmbh | Amplifier circuit for converting the current signal from an optical receiving element into a voltage signal |
| CN101079546A (en) * | 2006-05-26 | 2007-11-28 | 鸿富锦精密工业（深圳）有限公司 | Surge restraint circuit |
| CN101377976A (en) * | 2007-08-29 | 2009-03-04 | 熊江咏 | Electronic voltage transformer |
| CN101879882A (en) * | 2010-03-20 | 2010-11-10 | 中国第一汽车集团公司 | Vehicle body control unit |
| CN102435903A (en) * | 2011-11-14 | 2012-05-02 | 国网电力科学研究院 | Online monitoring device for turn-to-turn short circuit of voltage transformer |
| CN102510207A (en) * | 2011-08-29 | 2012-06-20 | 广州金升阳科技有限公司 | Short-circuit protection method for buffer output of DC/DC (Direct-Current/Direct-Current) power supply converter and buffer output circuit |
| CN103440974A (en) * | 2013-08-02 | 2013-12-11 | 苏刚印 | Multifunctional high-voltage transformer |
| CN203502489U (en) * | 2013-10-08 | 2014-03-26 | 陈�胜 | Improved circuit capable of expanding measurement scope of voltmeter |
| CN103713179A (en) * | 2013-12-24 | 2014-04-09 | 盐城工学院 | Fiber assembly current dynamic test system |
| CN203910508U (en) * | 2014-01-13 | 2014-10-29 | 浙江北互互感器有限公司 | Outdoor anti-ferromagnetic resonance voltage transformer |
| CN204407172U (en) * | 2015-02-15 | 2015-06-17 | 董亮星 | A kind of voltage transformer of anti-high-voltage impact |
| CN105262055A (en) * | 2015-08-31 | 2016-01-20 | 国网河南省电力公司电力科学研究院 | Overcurrent protection circuit with adjustable intermittent time |
| CN205067651U (en) * | 2015-10-29 | 2016-03-02 | 国网山东省电力公司枣庄供电公司 | Detect distribution networking return circuit electric leakage device with adjustable |
| CN106249045A (en) * | 2016-07-14 | 2016-12-21 | 江阴长仪集团有限公司 | A kind of wide-range electric power meter and metering method thereof |
-
2018
- 2018-07-26 CN CN201810837956.5A patent/CN108957085A/en active Pending
Patent Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1269893A (en) * | 1997-09-08 | 2000-10-11 | 西门子公司 | Circuit arrangement and method for protecting control element against overcurrent |
| US20060001493A1 (en) * | 2004-07-02 | 2006-01-05 | Infineon Technologies Fiber Optics Gmbh | Amplifier circuit for converting the current signal from an optical receiving element into a voltage signal |
| CN101079546A (en) * | 2006-05-26 | 2007-11-28 | 鸿富锦精密工业（深圳）有限公司 | Surge restraint circuit |
| CN101377976A (en) * | 2007-08-29 | 2009-03-04 | 熊江咏 | Electronic voltage transformer |
| CN101879882A (en) * | 2010-03-20 | 2010-11-10 | 中国第一汽车集团公司 | Vehicle body control unit |
| CN102510207A (en) * | 2011-08-29 | 2012-06-20 | 广州金升阳科技有限公司 | Short-circuit protection method for buffer output of DC/DC (Direct-Current/Direct-Current) power supply converter and buffer output circuit |
| CN102435903A (en) * | 2011-11-14 | 2012-05-02 | 国网电力科学研究院 | Online monitoring device for turn-to-turn short circuit of voltage transformer |
| CN103440974A (en) * | 2013-08-02 | 2013-12-11 | 苏刚印 | Multifunctional high-voltage transformer |
| CN203502489U (en) * | 2013-10-08 | 2014-03-26 | 陈�胜 | Improved circuit capable of expanding measurement scope of voltmeter |
| CN103713179A (en) * | 2013-12-24 | 2014-04-09 | 盐城工学院 | Fiber assembly current dynamic test system |
| CN203910508U (en) * | 2014-01-13 | 2014-10-29 | 浙江北互互感器有限公司 | Outdoor anti-ferromagnetic resonance voltage transformer |
| CN204407172U (en) * | 2015-02-15 | 2015-06-17 | 董亮星 | A kind of voltage transformer of anti-high-voltage impact |
| CN105262055A (en) * | 2015-08-31 | 2016-01-20 | 国网河南省电力公司电力科学研究院 | Overcurrent protection circuit with adjustable intermittent time |
| CN205067651U (en) * | 2015-10-29 | 2016-03-02 | 国网山东省电力公司枣庄供电公司 | Detect distribution networking return circuit electric leakage device with adjustable |
| CN106249045A (en) * | 2016-07-14 | 2016-12-21 | 江阴长仪集团有限公司 | A kind of wide-range electric power meter and metering method thereof |
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Application publication date: 20181207 |
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