CN205178875U - Dc voltage divider - Google Patents
Dc voltage divider Download PDFInfo
- Publication number
- CN205178875U CN205178875U CN201520656452.5U CN201520656452U CN205178875U CN 205178875 U CN205178875 U CN 205178875U CN 201520656452 U CN201520656452 U CN 201520656452U CN 205178875 U CN205178875 U CN 205178875U
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- China
- Prior art keywords
- voltage
- capacitor
- divider
- voltage divider
- equalizing capacitor
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- 239000003990 capacitor Substances 0.000 claims abstract description 49
- 238000009434 installation Methods 0.000 claims abstract description 15
- 150000001875 compounds Chemical group 0.000 claims description 2
- 238000012423 maintenance Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 8
- 230000001052 transient effect Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
Abstract
The utility model provides a dc voltage divider, the divider includes: elastic mounting piece (1), top ring (2), voltage -sharing condenser (3), divider resistance ware (4) and equalizer ring (5), elastic mounting piece (1) be four summits with " ten " font form installation piece that top ring (2) are connected, the installation piece with equalizer ring (5) parallel arrangement, among them vertical being provided with on the crossing center pin of " ten " font form voltage -sharing condenser (3). The utility model discloses mainly adopt the redundancy structure, carry out the parallelly connected redundancy of divider resistance ware and voltage -sharing condenser in each grade inside. Become the structure that many condensers are established ties with single voltage -sharing capacitor design. The partial pressure body adopts multistage resistor -Capacitor unit to establish ties to constitute, adopts identical component, and identical structure forms independent resistance -capacitance module, can carry out the merogenesis and install, the dc voltage divider's of being convenient for installation and maintenance.
Description
Technical field
The utility model relates to divider technique, is specifically related to a kind of divider.
Background technology
Along with the increase of DC engineering quantity, the probability that divider accident occurs increases thereupon.The divider of DC transmission engineering generally adopts electric resistance partial pressure principle, and high-voltage arm adopts multilevel resistance device cascaded structure.For ensureing the electric fields uniform of voltage divider in transient process, at every one-level resistor in parallel equalizing capacitor, falling roughly equal with the transient voltage maintained on every one-level resistor, ensureing the operational reliability of divider.In actual motion, there is the inefficacy because of single Resistor-Capacitor Unit in this structure, causes the possibility of divider output abnormality or complete failure.Be in particular in: when single equalizing capacitor open circuit, corresponding resistor will lose voltage equalizing protection, and under transient state surge voltage, this grade of resistor will bear larger overvoltage and may cause damage; When short circuit appears in single equalizing capacitor, then corresponding resistor will by short circuit, and divider high-voltage arm resistance value reduces, and cause the drift of voltage ratio, secondary voltage is overproof; When open circuit appears in single voltage grading resistor, then voltage divider secondary exports and lost efficacy, or at open circuit incision position Discharge Phenomena, causes the significantly high frequency overshoot and falling of secondary output voltage.
Utility model content
For overcoming above-mentioned defect, the utility model provides a kind of divider.Solve from structural design the defect and hidden danger that divider exists at present, solve the problem of divider operational reliability.
For achieving the above object, the technical solution of the utility model is as follows:
A kind of divider, voltage divider comprises: elasticity installation sheet (1), top ring (2), equalizing capacitor (3), voltage grading resistor (4) and grading ring (5);
Described elasticity installation sheet (1) is " ten " word shape installation sheet that four summits are connected with described top ring (2);
Described installation sheet and described grading ring (5) be arranged in parallel, described " ten " word shape intersects on central shaft and is vertically provided with described equalizing capacitor (3) therebetween, the outside upright being positioned at described equalizing capacitor (3) is provided with one end four arms crossing with described " ten " font and is connected, four voltage grading resistors (4) that the other end is connected with described grading ring (5).
Described voltage grading resistor (4) is the resistor coupled in parallel that 4 roadlock values are identical.
The structure of described equalizing capacitor (3) is: every 4 electric capacity of electric capacity that 8 capacity are identical are one group, amounts to two groups of electric capacity; 4 Capacitance parallel connections in one group, two groups of capacitances in series composition equalizing capacitor (3).
Described equalizing capacitor (3) is in parallel with voltage grading resistor (4).
The equalizing capacitor that described equalizing capacitor (3) and voltage grading resistor (4) are withstand voltage twice and voltage grading resistor, to reduce capacitance-resistance damage.
The every one-level of high-voltage arm of described voltage divider adopts the capacitor in parallel of similar resistance.
High-voltage arm every one-level equalizing capacitor of described voltage divider uses the capacitor of identical capacity and tandem compound forms.
With immediate prior art ratio, the beneficial effects of the utility model are as follows:
1. mainly adopt redundancy structure, utilize the structure of divider high-voltage arm plural serial stage, design the parallel redundancy carrying out voltage grading resistor and equalizing capacitor in every one-level inside, improve the reliability of divider when single resistor or single capacitor element open fault generation.
2. adopt the structure single equalizing capacitor being designed to many capacitor series connection, improve the reliability of divider when single equalizing capacitor open fault occurs.
3. a point laminate adopts multistage Resistor-Capacitor Unit to be composed in series, and every one-level adopts identical element, identical structure, forms independently capacitance-resistance module, can carry out merogenesis installation, be convenient to the installation and maintenance of divider.
Accompanying drawing explanation
Fig. 1 is divider schematic diagram.
Fig. 2 is divider single-stage Resistor-Capacitor Unit redundancy structure schematic diagram.
Fig. 3 is divider single-stage Resistor-Capacitor Unit redundancy structure pictorial diagram.
Fig. 4 is equalizing capacitor built-in redundancy structure pictorial diagram.
Fig. 5 is equalizing capacitor pictorial diagram.
Wherein, 1: elasticity installation sheet; 2: top ring; 3: equalizing capacitor; 4: voltage grading resistor; 5: grading ring; 6: equipotential connection contact pin; 7: cell capaciator; 8: the total electrode of equalizing capacitor; 9: protecting sheathing.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the utility model is described in further detail:
If Fig. 1 is that one is applied to the ± electrical connection schematic diagram of the structure of the high reliability divider of 11000kV.Be illustrated in figure 2 divider single-stage Resistor-Capacitor Unit redundancy structure schematic diagram, adopt 4 road resistor coupled in parallel, 8 electric capacity are connected mode in parallel more between two, and divider adopts modularization Resistor-Capacitor Unit to be in series, and each capacitance-resistance module adopts redundancy structure.Be illustrated in figure 3 the pictorial diagram of a capacitance-resistance module.Wherein: elasticity installation sheet 1, top ring 2, equalizing capacitor 3, voltage grading resistor 4, grading ring 5.Wherein, four identical capacitor in parallel composition voltage grading resistors 4.Equalizing capacitor 3 shown in Fig. 4 is connected by 8 identical cell capaciators 7 liang and four is formed in parallel, comprises the total electrode 8 of equalizing capacitor, equipotential connection contact pin 6.Figure 5 shows that a complete equalizing capacitor, is be encapsulated in protecting sheathing 9 by the cell capaciator of 8 in Fig. 47.
In divider accident, the resistance probability that is short-circuited is extremely low, causes voltage divider to work during resistance interruption, and 4 resistance 4 utilizing resistance value identical are in parallel, and when ensureing single resistance interruption, voltage divider can normally work, and contingency occurrence probability reduces to original 1/4.Open circuit and short circuit all ubiquities in capacitive insulation accident, adopt the method for 8 identical capacity cell capacitors 7 first two series connection, four parallel connections again, ensure that arbitrary electric capacity voltage divider that goes wrong can normally work, another electric capacity withstand voltage of connecting during single capacitance short-circuit raises, by withstand voltage for electric capacity be designed to normal operating conditions under withstand voltage 2 times, reduce the probability that equalizing capacitor has an accident.Adopt the series-parallel combining structure of Multilevel partial-pressure, during fault, the change of voltage divider total resistance value is very little, and the change of high-voltage arm time constant is negligible, does not substantially affect transient characterisitics and the frequency characteristic of divider.
It is to be understood that, the utility model content and embodiment be intended to prove the utility model the practical application of technical scheme is provided, should not be construed as the restriction to the utility model protection range.Those skilled in the art, under spirit of the present utility model and principle inspire, can do various amendment, equivalent replacement or improve.But these changes or amendment are all in the protection range that application is awaited the reply.
Claims (7)
1. a divider, is characterized in that: described voltage divider comprises: elasticity installation sheet (1), top ring (2), equalizing capacitor (3), voltage grading resistor (4) and grading ring (5);
Described elasticity installation sheet (1) is " ten " word shape installation sheet that four summits are connected with described top ring (2);
Described installation sheet and described grading ring (5) be arranged in parallel, described " ten " word shape intersects on central shaft and is vertically provided with described equalizing capacitor (3) therebetween, the outside upright being positioned at described equalizing capacitor (3) is provided with one end four arms crossing with described " ten " font and is connected, four voltage grading resistors (4) that the other end is connected with described grading ring (5).
2. voltage divider according to claim 1, is characterized in that: described voltage grading resistor (4) is the resistor coupled in parallel that 4 roadlock values are identical.
3. voltage divider according to claim 1, is characterized in that: the structure of described equalizing capacitor (3) is: every 4 electric capacity of electric capacity that 8 capacity are identical are one group, amounts to two groups of electric capacity; 4 Capacitance parallel connections in one group, two groups of capacitances in series composition equalizing capacitor (3).
4. voltage divider according to claim 1, is characterized in that: described equalizing capacitor (3) is in parallel with voltage grading resistor (4).
5. voltage divider according to claim 1, is characterized in that: the equalizing capacitor that described equalizing capacitor (3) and voltage grading resistor (4) are withstand voltage twice and voltage grading resistor, to reduce capacitance-resistance damage.
6. voltage divider according to claim 1, is characterized in that: the every one-level of high-voltage arm of described voltage divider adopts the capacitor in parallel of similar resistance.
7. voltage divider according to claim 1, is characterized in that: high-voltage arm every one-level equalizing capacitor of described voltage divider uses the capacitor of identical capacity and tandem compound forms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520656452.5U CN205178875U (en) | 2015-08-27 | 2015-08-27 | Dc voltage divider |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520656452.5U CN205178875U (en) | 2015-08-27 | 2015-08-27 | Dc voltage divider |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205178875U true CN205178875U (en) | 2016-04-20 |
Family
ID=55742805
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520656452.5U Active CN205178875U (en) | 2015-08-27 | 2015-08-27 | Dc voltage divider |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205178875U (en) |
-
2015
- 2015-08-27 CN CN201520656452.5U patent/CN205178875U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |