CN106645858A - High-voltage resistor voltage divider for intelligent switchgear of 10KV distribution network - Google Patents
High-voltage resistor voltage divider for intelligent switchgear of 10KV distribution network Download PDFInfo
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- CN106645858A CN106645858A CN201710116285.9A CN201710116285A CN106645858A CN 106645858 A CN106645858 A CN 106645858A CN 201710116285 A CN201710116285 A CN 201710116285A CN 106645858 A CN106645858 A CN 106645858A
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- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
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Classifications
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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
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Abstract
The invention relates to the field of measuring equipment, and more specifically, relates to a high-voltage resistor voltage divider for intelligent switchgear of a 10KV distribution network. The high-voltage resistor voltage divider comprises an insulated substrate, high-voltage resistor modules, low-voltage resistor modules and a secondary control circuit module, wherein the high-voltage resistor modules and the low-voltage resistor modules are respectively installed on two sides of the insulated substrate, and the adjacent high-voltage resistor modules and low-voltage resistor modules are connected in series; a primary outgoing terminal is arranged at the top of the top high-voltage resistor module, and the bottom of the bottom high-voltage resistor module is connected with the secondary control circuit module; and a ground outgoing terminal is arranged at the bottom of the secondary control circuit module. The high-voltage resistor voltage divider for the intelligent switchgear of the 10KV distribution network has the advantages that the manufacturing cost of the high-voltage resistor voltage divider is obviously lower than that of an electromagnetic voltage transformer under the condition that the measurement reliability is ensured, direct-current magnetization and ferromagnetic resonance are avoided, and the safe operation level of the distribution network can be improved.
Description
Technical field
The present invention relates to measuring apparatus field, more particularly, to a kind of for 10KV power distribution network Intellectualized Switchgears
Highvoltage resistance potential divider.
Background technology
In the field of device measuring, in the case that needs are constant in total voltage, connect one point on a certain circuit
Piezoresistance, will play partial pressure, and a part of voltage will be dropped on divider resistance, and the voltage for making the partial circuit two ends subtracts
Little, the resistance of divider resistance is bigger, and partial pressure effect is more obvious, and a high voltage is applied to the primary voltage of highvoltage resistance potential divider
When between terminal and ground terminal, produce secondary voltage between secondary voltage lead-out terminal and ground terminal, primary voltage with
The ratio of secondary voltage amplitude is referred to as voltage ratio, is numerically nearly equal to the ratio of high-voltage arm resistance value and low-voltage arm resistance value.
In the market, having various highvoltage resistance potential dividers, in general, conventional switching devices it is secondary
Control loop commonly uses electromagnetic relay, needs the output of requirement secondary voltage to have sufficiently large power capacity, needs with electricity consumption
Electromagnetic type voltage transformer.
The intelligent 10kV power distribution networks switchgear secondary control loop for using in a large number at present has been used electronic circuit instead and has been entered
Row measurement and control, secondary voltage signal source need not provide big power output, it is allowed to be replaced using highvoltage resistance potential divider
Traditional electromagnetic potential transformer is used as voltage ratio converter.
But, it is contemplated that highvoltage resistance potential divider has higher accuracy of measurement to require, current 10kV power distribution networks switch sets
The standby highvoltage resistance potential divider for using mainly uses thick-film resistor, particularly high-voltage arm resistance to be substantially all and use thick-film resistor.
Thick-film resistor uses the crystal that metal oxide and metal oxide salt are generated as conducting medium, the electricity with semiconductive material
Conductance, these crystal and appropriate glassy inorganic binder and metal powder micron-sized particle is worn into, and mixes organic
Agent stirs into slurry, and resistance circuit is printed on a ceramic substrate with screen printing technique, sinters in high temperature furnace, finally uses and swashs
Light repaiies school to the nominal value of resistance.Simply, the cost of thick-film resistor is higher so made by production, while crystal has degenerating
Characteristic, the degree of accuracy can reduce with use time, and service life be difficult to reach the requirement of power distribution network switchgear.
It is therefore proposed that a kind of highvoltage resistance potential divider for 10KV power distribution network Intellectualized Switchgears for solving the above problems
It is actually necessary.
The content of the invention
The present invention is to overcome at least one defect (deficiency) described in above-mentioned prior art, there is provided one kind is used for 10KV distribution
The highvoltage resistance potential divider of net Intellectualized Switchgear.
To solve above-mentioned technical problem, technical scheme is as follows：One kind sets for 10KV power distribution network intelligent switch
Standby highvoltage resistance potential divider, including insulated substrate, high voltage resistive module and low-voltage resistive module, also including linear quadratic control
Return circuit module；
The high voltage resistive module and low-voltage resistive module are separately mounted to insulated substrate both sides, adjacent high voltage electricity
It is connected in series between resistance module and low-voltage resistive module；
The high voltage resistive module top of the top is provided with an outlet terminal, the high voltage resistive module of the bottom
Bottom be connected with secondary control loop module；
The secondary control loop module bottom is provided with ground connection outlet electronics end, by high voltage resistive module and low electricity
Piezoresistance module is separately mounted to insulated substrate both sides, using wire, successively to adjacent high voltage resistive module and low-voltage
Resistive module carries out the connection of bamboo between plum blossom so as to be divided into high voltage resistive module side and low-voltage resistive module side, and
By secondary control loop module, realize to high voltage resistive module and the regulating and controlling voltage of low-voltage resistive module, ensureing to survey
Under the conditions of amount is reliable so that the manufacturing cost of highvoltage resistance potential divider is substantially less than electromagnetic potential transformer, the peace of needs
Dress space is also much smaller, and dc magnetization and ferromagnetic resonance will not occur, and can improve the safety operation level of power distribution network.
Further, the secondary control loop module includes secondary outlet terminal and linear quadratic control resistance, described secondary
Control resistance one end is connected with bottom high voltage resistive module bottom, and the other end is connected with ground connection outlet electronics end, institute
Secondary outlet terminal is stated installed in linear quadratic control resistance and the junction of bottom high voltage resistive module, by secondary outgoing line end
The attachment structure of son and linear quadratic control resistance, instead of traditional electromagnetic potential transformer as voltage ratio converter, make
Its structure is simpler, and production cost is cheaper.
Further, the high voltage resistive module and low-voltage resistive module are Mirror Grinding, pass through
The series connection of multiple Mirror Grindings, can replace traditional thick-film resistor, so as to reduce production cost.
Further, the resistance of the Mirror Grinding is more than the resistance of linear quadratic control resistance, in actual applications,
The size of its resistance can be controlled according to specific voltage, to realize measuring the demand of different circuits.
Further, also including linking arm, an outlet terminal is electric with the high voltage of top by linking arm
Resistance module top is connected, by linking arm so that the stronger high voltage resistance installed in top of outlet terminal
Module top, will not cause terminal to come off because fixation is insecure because of long-term use.
Additionally, also including lead pad, the linear quadratic control resistance is connected by lead pad with ground connection outlet electronics end
Connect, by lead pad, it can be ensured that ground connection outlet electronics end is fully contacted with linear quadratic control resistance, will not fall off and there is peace
Full hidden danger.
Further, the insulated substrate is provided with lead connecting hole, and the adjacent high voltage resistive module passes through
It is connected in series between lead connecting hole and low-voltage resistive module, by lead connecting hole so that the connection of wire is more smooth.
Further, connect in " it " font between the high voltage resistive module and low-voltage resistive module, pass through
The connected mode of " it " font, can save installing space so that the module is volume required to diminish so as to fit for difference
Measuring instrument in.
Further, the insulated substrate is double-sided PCB board, and the setting of double-sided PCB board can cause high voltage resistance
Insulating properties between module and low-voltage resistive module are more preferable.
Further, the double-sided PCB board is in strip, and in actual applications, the shape of double-sided PCB board can be according to reality
Need to be arranged to different shapes, it is within protection scope of the present invention.
Compared with prior art, the beneficial effect of technical solution of the present invention is：
(1) highvoltage resistance potential divider for 10KV power distribution network Intellectualized Switchgears disclosed by the invention, by high electricity
Piezoresistance module and low-voltage resistive module are separately mounted to insulated substrate both sides, using wire, successively to adjacent high voltage
Resistive module and low-voltage resistive module carry out the connection of bamboo between plum blossom so as to be divided into high voltage resistive module side and low-voltage
Resistive module side, and by secondary control loop module, realize to high voltage resistive module and the electricity of low-voltage resistive module
Pressure regulation and control, under the conditions of ensureing that measurement is reliable so that the manufacturing cost of highvoltage resistance potential divider is substantially less than electromagnetic potential
Transformer, the installing space of needs is also much smaller, and dc magnetization and ferromagnetic resonance will not occur, and can improve power distribution network
Safety operation level.
(2) highvoltage resistance potential divider for 10KV power distribution network Intellectualized Switchgears disclosed by the invention, by it is secondary go out
The attachment structure of line terminals and linear quadratic control resistance, instead of traditional electromagnetic potential transformer and converts as voltage ratio
Device so as to which structure is simpler, production cost is cheaper.
(3) highvoltage resistance potential divider for 10KV power distribution network Intellectualized Switchgears disclosed by the invention, by multiple essences
The series connection of close metalfilmresistor, can replace traditional thick-film resistor, so as to reduce production cost.
(4) highvoltage resistance potential divider for 10KV power distribution network Intellectualized Switchgears disclosed by the invention, by two-sided PCB
The setting of plate, can cause the insulating properties between high voltage resistive module and low-voltage resistive module more preferable.
Description of the drawings
Fig. 1 is the structural representation of the highvoltage resistance potential divider for being used for 10KV power distribution network Intellectualized Switchgears in the present invention.
In figure, 1 is high-voltage arm metalfilmresistor, 2 is low-voltage arm metalfilmresistor, 3 is double-sided PCB board, 4 are for outlet terminal, 5
Secondary outlet terminal, 6 are linear quadratic control resistance, 8 are lead connecting hole for ground connection outlet electronics end, 7.
Specific embodiment
Accompanying drawing being for illustration only property explanation, it is impossible to be interpreted as the restriction to this patent；It is attached in order to more preferably illustrate the present embodiment
Scheme some parts to have omission, zoom in or out, do not represent the size of actual product；To those skilled in the art,
Some known features and its explanation in accompanying drawing may be omitted and will be understood by.
In describing the invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " company
Connect " should be interpreted broadly, for example, it may be being fixedly connected, or being detachably connected, or it is integrally connected；It can be machine
Tool connects, or electrically connects；It can be joined directly together, or be indirectly connected with by intermediary, it may be said that two
The connection of element internal.For the ordinary skill in the art, with concrete condition above-mentioned term can be understood in the present invention
Concrete meaning.Technical scheme is described further with reference to the accompanying drawings and examples.
Present embodiment discloses a kind of highvoltage resistance potential divider for 10KV power distribution network Intellectualized Switchgears, including it is two-sided
Pcb board 3, high-voltage arm metalfilmresistor 1 and low-voltage arm metalfilmresistor 2, secondary control loop module；High-voltage arm metalfilmresistor
1 and low-voltage arm metalfilmresistor 2 be separately mounted to the both sides of double-sided PCB board 3, adjacent high-voltage arm metalfilmresistor 1 and low-voltage arm gold
It is connected in series between category film resistance 2；The top of high-voltage arm metalfilmresistor 1 of top is provided with an outlet terminal 4, the bottom
The bottom of high-voltage arm metalfilmresistor 1 is connected with secondary control loop module；And be provided with secondary control loop module bottom
Ground connection outlet electronics end 6, by the way that high-voltage arm metalfilmresistor 1 and low-voltage arm metalfilmresistor 2 are separately mounted to double-sided PCB board
Both sides, using wire, carry out bamboo between plum blossom to adjacent high-voltage arm metalfilmresistor 1 and low-voltage arm metalfilmresistor 2 successively
Connection so as to be divided into the side of high-voltage arm metalfilmresistor 1 and the side of low-voltage arm metalfilmresistor 2, and by secondary control loop
Module, realizes to high-voltage arm metalfilmresistor 1 and the regulating and controlling voltage of low-voltage arm metalfilmresistor 2, is ensureing the reliable bar of measurement
Under part so that the manufacturing cost of highvoltage resistance potential divider is substantially less than electromagnetic potential transformer, the installing space of needs is also little
Much, and dc magnetization and ferromagnetic resonance will not occur, the safety operation level of power distribution network can be improved.
In the present invention, also including linking arm, an outlet terminal is by linking arm and the high voltage resistive mode of top
Block top is connected, by linking arm so that the stronger high voltage resistive module installed in top of outlet terminal
Top, will not cause terminal to come off because fixation is insecure because of long-term use, additionally, also include lead pad, it is described
Linear quadratic control resistance is connected by lead pad with ground connection outlet electronics end, by lead pad, it can be ensured that ground connection outlet
Electronics end is fully contacted with linear quadratic control resistance, will not fall off and there is potential safety hazard.
Wherein, secondary control loop module includes secondary outlet terminal 5 and linear quadratic control resistance 7, linear quadratic control resistance 7 one
End is connected with the bottom of bottom high-voltage arm metalfilmresistor 1, and the other end is connected with ground connection outlet electronics end 6, secondary outgoing line
Terminal 5 is arranged on the junction of linear quadratic control resistance 7 and bottom high-voltage arm metalfilmresistor 1, by the He of secondary outlet terminal 5
The attachment structure of linear quadratic control resistance 7, instead of traditional electromagnetic potential transformer as voltage ratio converter so as to tie
Structure is simpler, and production cost is cheaper.In actual applications, high-voltage arm metalfilmresistor 1 and low-voltage arm metalfilmresistor 2
Mirror Grinding is, by the series connection of multiple Mirror Grindings, traditional thick-film resistor can be replaced, so as to drop
Low production cost.And the resistance of Mirror Grinding is more than the resistance of linear quadratic control resistance, in actual applications, can be with root
The size of its resistance is controlled according to specific voltage, to realize measuring the demand of different circuits.
Additionally, being provided with lead connecting hole 8 on double-sided PCB board 3, adjacent high-voltage arm metalfilmresistor 1 is connected by lead
Connect and be connected in series between hole and low-voltage arm metalfilmresistor 2, by lead connecting hole 8 so that the connection of wire is more smooth, it is high
Connect in " it " font between pressure arm metalfilmresistor 1 and low-voltage resistive module, by the connected mode of " it " font, can be with
Installing space is saved so that the module is volume required to diminish so as to fit in different measuring instruments, additionally, also wrapping
Lead pad is included, the linear quadratic control resistance is connected by lead pad with ground connection outlet electronics end, wherein, in the present embodiment
In, double-sided PCB board is in strip, and in actual applications, the shape of double-sided PCB board can according to actual needs be arranged to different shapes
Shape, it is within protection scope of the present invention.
As shown in figure 1, a kind of measuring high-tension resistive of 10KV power distribution networks is disclosed, in two sides of double-sided PCB board
Face is respectively provided with high-voltage arm metalfilmresistor 1 and low-voltage arm metalfilmresistor 2, wherein, the quantity of high-voltage arm metalfilmresistor 1 is
16, the quantity of low-voltage arm metalfilmresistor 2 is 15, adjacent high-voltage arm metalfilmresistor 1 and low-voltage arm metalfilmresistor 2
It is serially connected in front and back, wherein, high-voltage arm metalfilmresistor 1 and low-voltage arm metalfilmresistor 2 adopt nominal value for 1M Ω, resistance
Precision 0.1%, 25ppm/ DEG C of temperature coefficient, the RJ24 type Mirror Grindings of power capacity 0.5W, and form of zigzag are arranged
It is listed on the double-sided PCB board of bar shaped, then welds in series.
Then, topmost, it is not connected into the lead pad of the resistance of series connection and welds a terminal from positioned at double-sided PCB board
Outlet, is 10k Ω from be not connected into series connection in the lead pad of the resistance of series connection to access 1 nominal value positioned at pcb board bottom
Linear quadratic control resistance 7, the resistance precision 0.1% of the linear quadratic control resistance 7,25ppm/ DEG C of temperature coefficient, power capacity 0.5W
RJ24 type Mirror Grindings, while weld secondary terminals outlet, in the lead for not accessing series connection of metalfilmresistor
Ground terminal outlet is welded on pad, highvoltage resistance potential divider is made, wherein, the 10kV resitstance voltage dividers manufactured by Fig. 1 are nominal
Intrinsic standoff ratio is 3101, carries out adjustment of dispatching from the factory again after resin-encapsulated so that divider is placed in test mode, in secondary voltage output
Port is in parallel to access resistance box, and it is 3250 to adjust resistance box and make intrinsic standoff ratio, then removes resistance box, with the close resistance of resistance value
The 100k Ω of case indicating value～220k Ω resistor coupled in parallel accesses secondary voltage output port, and the voltage ratio for making divider is equal to 3250.
Because the Mirror Grinding that the present invention is used will not occur metal oxide and metal oxide salt crystal
Degradation effect, useful life can meet 10kV power distribution network switchgear requirements, and its manufacturing cost is less than high-voltage thick-film resistance,
Price can be reduced to less than 1/2nd of high-voltage thick-film resistance, can effectively extend the use of power distribution network highvoltage resistance potential divider
Life-span and its production cost of attenuating.
In actual applications, multiple Mirror Grindings in series, along its length using "the" shape
Insulated substrate both sides are arranged in from top to bottom, wherein side is high-voltage arm resistance, and opposite side is low-voltage arm resistance, from high-voltage arm electricity
Resistance is not connected into the lead end of series connection and welds an outlet, and the lead end for not being connected into series connection from low-voltage arm resistance is welded and is grounded out
Line, from the series conductor wire end of high-voltage arm resistance and low-voltage arm resistance secondary outgoing line is welded, and makes highvoltage resistance potential divider, is used
When, when a high voltage is applied between the primary voltage terminal of highvoltage resistance potential divider and ground terminal, in secondary voltage
Secondary voltage is produced between lead-out terminal and ground terminal, the effect of electric resistance partial pressure is formed, by the structure, can be further
Partial pressure is carried out to resistance, and saves the space required for installing, wiring is connected and drawn by multiple Mirror Grindings
Mode replaces thick-film resistor, has saved the cost of production.
In figure, position relationship being for illustration only property explanation is described, it is impossible to be interpreted as the restriction to this patent；Obviously, this
Bright above-described embodiment is only intended to clearly illustrate example of the present invention, and is not to embodiments of the present invention
Limit.For those of ordinary skill in the field, other multi-forms can also be made on the basis of the above description
Change or variation.There is no need to be exhaustive to all of embodiment.It is all the spirit and principles in the present invention it
Interior made any modification, equivalent and improvement etc., should be included within the protection domain of the claims in the present invention.
Claims (10)
1. a kind of highvoltage resistance potential divider for 10KV power distribution network Intellectualized Switchgears, including insulated substrate, high voltage resistance
Module and low-voltage resistive module, it is characterised in that also including secondary control loop module；
The high voltage resistive module and low-voltage resistive module are separately mounted to insulated substrate both sides, adjacent high voltage resistive mode
It is connected in series between block and low-voltage resistive module；
The high voltage resistive module top of the top is provided with an outlet terminal, the bottom of the high voltage resistive module of the bottom
End is connected with secondary control loop module；
The secondary control loop module bottom is provided with ground connection outlet electronics end.
2. the highvoltage resistance potential divider for 10KV power distribution network Intellectualized Switchgears according to claim 1, its feature exists
Include secondary outlet terminal and linear quadratic control resistance in, the secondary control loop module, described linear quadratic control resistance one end with
Bottom high voltage resistive module bottom is connected, and the other end is connected with ground connection outlet electronics end, the secondary outlet terminal
Installed in linear quadratic control resistance and the junction of bottom high voltage resistive module.
3. the highvoltage resistance potential divider for 10KV power distribution network Intellectualized Switchgears according to claim 2, its feature exists
Mirror Grinding is in, the high voltage resistive module and low-voltage resistive module.
4. the highvoltage resistance potential divider for 10KV power distribution network Intellectualized Switchgears according to claim 3, its feature exists
In the resistance of the Mirror Grinding is more than the resistance of linear quadratic control resistance.
5. the highvoltage resistance potential divider for 10KV power distribution network Intellectualized Switchgears according to claim 1, its feature exists
In also including linking arm, an outlet terminal is connected by linking arm with the high voltage resistive module top of top.
6. the highvoltage resistance potential divider for 10KV power distribution network Intellectualized Switchgears according to claim 1, its feature exists
In also including lead pad, the linear quadratic control resistance is connected by lead pad with ground connection outlet electronics end.
7. the highvoltage resistance potential divider for 10KV power distribution network Intellectualized Switchgears according to claim 1, its feature exists
In the insulated substrate is provided with lead connecting hole, and the adjacent high voltage resistive module is by lead connecting hole and low electricity
It is connected in series between piezoresistance module.
8. the highvoltage resistance potential divider for 10KV power distribution network Intellectualized Switchgears according to claim 1, its feature exists
In in the connection of " it " font between the high voltage resistive module and low-voltage resistive module.
9. the highvoltage resistance potential divider for 10KV power distribution network Intellectualized Switchgears according to claim 1, its feature exists
In the insulated substrate is double-sided PCB board.
10. the highvoltage resistance potential divider for 10KV power distribution network Intellectualized Switchgears according to claim 9, its feature exists
In the double-sided PCB board is in strip.
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| Application Number | Priority Date | Filing Date | Title |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110706878A (en) * | 2019-11-12 | 2020-01-17 | 浙江全瑞本科技股份有限公司 | Voltage transformer removes magnetism protective structure |
| CN111800977A (en) * | 2020-08-13 | 2020-10-20 | 国网福建省电力有限公司 | Voltage transformer divider resistor arrangement structure based on double-layer SMT |
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| CN103926441A (en) * | 2014-04-25 | 2014-07-16 | 湖南银河电气有限公司 | Novel voltage divider |
| CN104237593A (en) * | 2014-09-26 | 2014-12-24 | 国家电网公司 | Voltage divider, voltage division circuit thereof and voltage division control method |
| CN204314358U (en) * | 2015-01-12 | 2015-05-06 | 苏州华电电气股份有限公司 | A kind of AC potentiometer |
| CN206671393U (en) * | 2017-03-01 | 2017-11-24 | 中山市泰峰电气有限公司 | A kind of highvoltage resistance potential divider for 10KV power distribution network Intellectualized Switchgears |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110706878A (en) * | 2019-11-12 | 2020-01-17 | 浙江全瑞本科技股份有限公司 | Voltage transformer removes magnetism protective structure |
| CN110706878B (en) * | 2019-11-12 | 2021-06-08 | 浙江全瑞本科技股份有限公司 | Voltage transformer removes magnetism protective structure |
| CN111800977A (en) * | 2020-08-13 | 2020-10-20 | 国网福建省电力有限公司 | Voltage transformer divider resistor arrangement structure based on double-layer SMT |
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