CN103515037B - The skeleton of a kind of high-voltage arm and Resistor Divider for Impulse Voltage Measurements - Google Patents
The skeleton of a kind of high-voltage arm and Resistor Divider for Impulse Voltage Measurements Download PDFInfo
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- CN103515037B CN103515037B CN201210391139.4A CN201210391139A CN103515037B CN 103515037 B CN103515037 B CN 103515037B CN 201210391139 A CN201210391139 A CN 201210391139A CN 103515037 B CN103515037 B CN 103515037B
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Abstract
The invention discloses the skeleton of a kind of high-voltage arm, this skeleton is rectangle.This kind of skeleton can effectively reduce residual induction, alleviates the distortion of output waveform.Resistance wire is had mercy on insulation board skeleton with two-wire opposing connection noninductive winding, resistive element length is about 600mm, eventually pass vacuum paint film to process, the high-voltage arm resistance value of actual measurement is 5143.7 Ω, inductance value is 21.56 μ H, less than circular framework value of calculation 145.30 μ H, Resistor Divider for Impulse Voltage Measurements actual measurement square-wave response is less than 10ns.
Description
Technical field
The present invention relates to power system electrical device field, be specifically related to the skeleton of a kind of high-voltage arm and use this skeleton
Resistor Divider for Impulse Voltage Measurements.
Background technology
Impacting high-tension measuring method and have a variety of, the more commonly used is that system measured by impulse voltage divider.Traditional rushes
Hit Voltage Divider Measuring System to be made up of potentiometer, high-voltage connection.Impulse voltage divider can be divided into resitstance voltage divider, capacitive divider
And RC divider.Resistor Divider for Impulse Voltage Measurements is made up of bucking electrode, high-voltage arm and low-voltage arm, and wherein height pressure arm is electricity
Resistance arm.Its schematic diagram as shown in Figure 1, wherein VINFor tested high pressure, VoutFor the low-voltage signal of potentiometer output, high-voltage arm resistance
R1It is far longer than low-voltage arm resistance R2.Resistor Divider for Impulse Voltage Measurements is similar to the potentiometer ultimate principle under steady state voltage, but owing to having
The requirement of dynamic characteristic, it should make close as far as possible is noninductive.
Existing high-voltage arm is generally wound on round insulation skeleton with noninductive winding with high-quality resistance wire.In order to reduce electricity
Sense, it is desirable on the premise of meeting resistance and limiting temperature rise, resistance wire should be the shortest, it is desirable to the resistance coefficient ratio of resistance material
Relatively big, temperature coefficient is smaller.Therefore the high-voltage arm of resitstance voltage divider generally uses constantan wire or card agate filament winding system.Shown in Fig. 2
Be the schematic diagram of noninductive resistance winding.The most employing constantan wires or Ka Masi press in Fig. 2 (a), and the method shown in (b) is wound on
Making parallel on plastic tube or with resistance wire, glass fiber becomes band as warp knitting, then this resistor is rolled on insulating cylinder such as
(c) method in figure two.Fig. 2 (a) show the double-deck reversely winding of two-wire, is to use resistance wire with spiral spaced winding first on insulating cylinder
Layer (internal layer), again with the opposite direction spiral spaced winding second layer (outer layer), impregnated insulating paint system after wrapping insulating barrier after wrapping insulating barrier
Become.The size of residual inductance and winding have the biggest relation, and turn-to-turn distance is the least, and residual inductance is the least.The resistance wire of bag insulation
Can be closeer around obtaining, the turn-to-turn distance of helical wants more relatively large.Patent [high-voltage precise resistance divider and manufacture method]
(application number: 200910084858.X) provides the manufacture method of a kind of resistive film, and it solves resistance value stability well
Problem, but do not solve the problem that inductance is excessive.
In traditional resitstance voltage divider high-voltage arm makes, the noninductive winding of resistance wire is the most ripe, therefore considers to change
High-voltage arm insulation framework is to reduce inductance.Patent [transformer insulating framework] (application number: 200920261693.4) provides one
Plant the cylindricality insulation framework applying to transformator.This insulation framework mainly solves the Insulation Problems of high-tension transformer, but does not relates to
And the reduction problem of inductance, and framing structure is not suitable for resitstance voltage divider.
Summary of the invention
It is an object of the invention to provide the skeleton of a kind of high-voltage arm and use the Resistor Divider for Impulse Voltage Measurements of this skeleton, effectively
Reduce residual induction, alleviate the distortion of output waveform.
The technical solution of the present invention is as follows:
The skeleton of a kind of high-voltage arm, its feature is: described skeleton is rectangle.
Under girth same case, the length-width ratio of skeleton rectangle becomes big as far as possible, and residual induction so can be made to become less.
Described skeleton uses the casting insulated plate of rectangle epoxy.
A kind of Resistor Divider for Impulse Voltage Measurements of the skeleton using described high-voltage arm, its feature is, resistance wire with noninductive around
Method is around in this skeleton.
The external diameter of described insulating support is 108mm, internal diameter 98mm, and the width of skeleton is 35mm, a length of 600mm, thick
Degree is 10mm, and described resistance wire uses Germany import enamel-cover Ka Masi, and the high-voltage arm resistance value of actual measurement is 5143.7 Ω, inductance value
It is 21.56 μ H.
The principle of the present invention is as follows:
Calculating during inductance, as a example by the double-deck reversely winding of two-wire, calculating same resistance silk and skeleton girth
In the case of inductance value.Two-wire is double-deck, and reversely winding is owing to also existing insulating barrier, and the diameter of internal layer and outer layer differs, because of
And the inductance of two-layer also differs, residual induction can not be completely counterbalanced by, and its value can be calculated as follows:
In formula: α1And α2Internal layer and the radius of outer layer winding, centimetre；The length of l winding, centimetre；W is mono-
The number of turn of layer winding；The centre distance of δ two-layer resistance wire, δ=a2-a1。
For rectangular framework, the double-deck reversely winding of two-wire does not has concrete computing formula, according to plain solenoid coil
Computing formula, rectangular solenoid inductance L1With circular solenoid inductor L2Ratio be:
In formula: the length of c and b solenoid bottom surface rectangle and width；The solenoidal length of d；ψc,ψbIt is and c, b,
The value that d is relevant.
Being computed, for plain solenoid coil, in the case of skeleton girth is identical, the inductance of square skeleton is less than
The inductance of circular framework, length-width ratio is the biggest, and inductance is the least.Reversely winding double-deck for two-wire, coil to be considered when calculating inductance
Between mutual inductance, owing to circular framework and rectangular framework all use same inductance winding, the mutual inductance difference between coil is little, therefore
For the coil of noninductive winding, rectangular framework still can make inductance diminish.
Concrete analysis can be calculated by example, and with 300kV Resistor Divider for Impulse Voltage Measurements as example, high-voltage arm resistance value is selected
Taking 5k Ω, resistance wire is around on the round insulation cylinder of Zhou Changwei 90mm with the double-deck reversely winding of two-wire, (1) formula the inductance calculated
Value is 145.30 μ H.For the inductance value of rectangular framework, simulation calculation can be passed through.Use the Magnet of Infolytica company
Software carries out magnetic field analysis, draws inductance value.
Keeping skeleton girth 90mm constant, set up the square skeleton that the length of side is 22.5mm, skeleton is outer around two-layer resistance wire,
Pass to the electric current of different directions, simulation result such as Fig. 4.In simulation result, it can be seen that the magnetic field intensity of thiol is minimum, more
The biggest near fringe magnetic field intensity.This is because pass to magnetic field major part produced by the resistance wire coil of different directions electric current mutually
Offset, only at coil marginal existence fraction leakage field.Emulation reads the magnetic linkage of resistance wire coil, divided by electric current, draws girth
The residual induction of the double-deck reversely winding of the square skeleton two-wire of 90mm is 114.22 μ H, than circle around FAXIA identical with girth
The residual induction of skeleton reduces 21.4%.
Now making skeleton girth constant, change length and the width of rectangular framework, the change of research resistance wire inductance value, from emulation knot
Really it can be seen that in the case of skeleton girth is constant, along with the increase that rectangular framework minor face is wide, inductance value increases in Fig. 5, its
Growth trend gradually slows down.When the minor face width of rectangular framework equal to long hem width, i.e. rectangular framework for square skeleton (in this example is
Time 22.5mm), inductance value is maximum, about 114.22 μ H, less than the inductance with girth circular framework.Along with rectangular framework minor face width
Reduction, inductance declines rapidly, and as minor face a width of 5mm, inductance value is 45.59 μ H, for the 39.91% of maximum.
Compared with prior art, the invention has the beneficial effects as follows
1, propose the high-voltage arm rectangular framework that Resistor Divider for Impulse Voltage Measurements is novel, residual induction can be reduced further.
2, when skeleton girth is identical, rectangular framework length-width ratio is the biggest, and inductance is the least.
Accompanying drawing explanation
Fig. 1 is resitstance voltage divider schematic diagram.
Fig. 2 is prior art noninductive resistance winding schematic diagram.
Fig. 3 is the sectional view of rectangular framework of the present invention.
Fig. 4 is the double-deck reversely winding magnetic field simulation of square skeleton two-wire.
Fig. 5 is inductance value with the wide change curve of rectangle minor face.
Detailed description of the invention
Below in conjunction with embodiment and accompanying drawing, the invention will be further described, but should not limit the protection model of the present invention with this
Enclose.
The present embodiment is the manufacture of 300kV Resistor Divider for Impulse Voltage Measurements: the skeleton of high-voltage arm selects width to be 35mm, a length of
600mm, thickness is the epoxy resins insulation plate of 10mm, and resistance wire uses Germany import enamel-cover Ka Masi, and its data information is as follows:
Title: enamel-cover Ka Masi (NiCr20ALSi)
Specification: 0.16mm
Every meter of resistance value: 66.19 Ω/m
Resistivity: 132 μ Ω * cm
Density: 8.0g/cm3(20 DEG C)
Thermal capacity: 0.46J/gK
Temperature coefficient: < 5ppm(20 DEG C to 105 DEG C)
Using this resistance wire to have mercy on insulation board skeleton with two-wire bilayer noninductive winding, resistive element length is about 600mm,
After through vacuum paint film process, the high-voltage arm resistance value of actual measurement is 5143.7 Ω, and inductance value is 21.56 μ H, less than prior art
Middle circular framework value of calculation 145.30 μ H, Resistor Divider for Impulse Voltage Measurements actual measurement square-wave response, less than 10ns, meets design needs.
Claims (3)
1. the skeleton of a Resistor Divider for Impulse Voltage Measurements high-voltage arm, it is characterised in that: described skeleton cross section is rectangle.
2. the skeleton of high-voltage arm as claimed in claim 1, it is characterised in that: under girth same case, the length of rectangular framework
The ratio of width is the bigger the better.
3. the skeleton of high-voltage arm as claimed in claim 1, it is characterised in that: resistance wire is around on this skeleton with noninductive winding.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210391139.4A CN103515037B (en) | 2012-10-15 | 2012-10-15 | The skeleton of a kind of high-voltage arm and Resistor Divider for Impulse Voltage Measurements |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210391139.4A CN103515037B (en) | 2012-10-15 | 2012-10-15 | The skeleton of a kind of high-voltage arm and Resistor Divider for Impulse Voltage Measurements |
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| Publication Number | Publication Date |
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| CN103515037A CN103515037A (en) | 2014-01-15 |
| CN103515037B true CN103515037B (en) | 2016-12-21 |
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| CN114914041A (en) * | 2022-05-19 | 2022-08-16 | 西安高研电器有限责任公司 | Resistor or resistor divider sharing substrate |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1731195A (en) * | 2005-08-31 | 2006-02-08 | 东南大学 | High-voltage pulse resistance voltage divider |
| CN202033398U (en) * | 2011-04-02 | 2011-11-09 | 烟台东方威思顿电气有限公司 | High-voltage bleeder with high impedance and high temperature stability |
| CN102436879A (en) * | 2011-08-01 | 2012-05-02 | 沈阳鼎盛中贝机电设备有限公司 | High-power non-inductive wire-wound resistor |
-
2012
- 2012-10-15 CN CN201210391139.4A patent/CN103515037B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1731195A (en) * | 2005-08-31 | 2006-02-08 | 东南大学 | High-voltage pulse resistance voltage divider |
| CN202033398U (en) * | 2011-04-02 | 2011-11-09 | 烟台东方威思顿电气有限公司 | High-voltage bleeder with high impedance and high temperature stability |
| CN102436879A (en) * | 2011-08-01 | 2012-05-02 | 沈阳鼎盛中贝机电设备有限公司 | High-power non-inductive wire-wound resistor |
Non-Patent Citations (3)
| Title |
|---|
| An Impulse Voltage Divider Covered with Metal Cylinder and Improvement of Its Response Characteristics;T.KUONO等;《Electrical Engineering in Japan》;19730331;第93卷(第3期);全文 * |
| 纳秒高压脉冲电阻分压器的结构优化;胡景森等;《高压电器》;20110131;第47卷(第1期);全文 * |
| 高压纳秒脉冲电阻分压器的结构;曲忠旭等;《电子测量技术》;20091130;第32卷(第11期);全文 * |
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