CN201829629U - Neutral wire connecting device of high-voltage parallel capacitor group - Google Patents
Neutral wire connecting device of high-voltage parallel capacitor group Download PDFInfo
- Publication number
- CN201829629U CN201829629U CN2010205254035U CN201020525403U CN201829629U CN 201829629 U CN201829629 U CN 201829629U CN 2010205254035 U CN2010205254035 U CN 2010205254035U CN 201020525403 U CN201020525403 U CN 201020525403U CN 201829629 U CN201829629 U CN 201829629U
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- China
- Prior art keywords
- copper
- neutral wire
- neutral line
- capacitor group
- parallel capacitor
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
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Abstract
The utility model relates to a neutral wire connecting device of a high-voltage parallel capacitor group, which comprises a copper bar neutral wire, a soft aluminum neutral wire and a bolt, and is characterized in that a copper-aluminum transition plate is arranged at the joint between the copper bar neutral wire and the soft aluminum neutral wire, and the copper bar neutral wire and the soft aluminum neutral wire are arranged on the bolt. The neutral wire connecting device of the high-voltage parallel capacitor group has simple and reasonable structure, is provided with the copper-aluminum transition plate with smaller size at the joint between a copper end and an aluminum end, has quick effect, good electrical performance and mechanical performance, lower used amount of copper material and lower manufacturing cost, can ensure the safe operation of equipment, and improves the reliability of power supply.
Description
Technical field
The utility model relates to a kind of jockey, particularly a kind of high-voltage parallel capacitor group neutral line jockey.
Background technology
Shunt capacitor is a kind of static reactive-load compensation equipment, and main effect is to provide reactive power to electric power system, improves power factor.The three-phase star connection of electric equipment all is connected on an end of each phase power supply or load on the neutral point, neutral point can be drawn as the neutral line, forms three-phase four-wire system.When the 10kV Shunt Capacitor Unit of 110kV transformer station put into operation, heating may appear in the neutral line of Shunt Capacitor Unit, when the normal operating temperature of temperature overshoot, can have a strong impact on the safe operation of capacitor group.The heating position of the neutral line mainly appears at the tie point (being called for short copper aluminium tie point) of copper bar line and aluminium flexible cord.And mainly contain for the heating origin cause of formation of tie point: 1, the tie point resistance value becomes big, generally oxidation corrosion occurs in the position of copper-aluminium tie point and causes.In malaria, the aluminium surface can produce alundum (Al, and the copper surface can generate the oxide-film of cupric oxide; These oxide-film electric conductivities are very low, cause the rising of tie point local temperature easily.There is potential difference in two kinds of intermetallics of copper aluminium, and copper is anodal primary cell, and aluminium is the negative pole primary cell, and directly contact forms battery effect easily, produces couple corrosion, has increased contact resistance, the phenomenon that causes conductor temperature to rise; Simultaneously, because copper aluminothermy coefficient of expansion difference, the thermal coefficient of expansion of copper is 17.7 μ m/m. ℃, and the thermal coefficient of expansion of aluminium is 23 μ m/m. ℃.Can not recover original volume simultaneously after the cooling, and the operation of long-time directly overlap joint can produce contact gap, thereby cause the junction loosening, contact resistance increases, and causes superheating phenomenon.2, eddy current appears in tie point, and Shunt Capacitor Unit is when adopting star connection, and its three phase capacitance value must reach balance in theory, so the neutral line electric current that do not have passes through.If Shunt Capacitor Unit three phase capacitance value does not reach the state of balance, make the neutral line have certain electric current to pass through, and these electric currents can form certain eddy current during by lead and tie point, eddy current can impel its temperature to raise by conductor.
The utility model content
It is a kind of simple and reasonable that the purpose of this utility model is to provide, use the less copper to aluminum adapter bar of a kind of volume in the tie point position of copper end and aluminium end, thereby can guarantee the security of operation of equipment, improve the reliability of power supply, and the copper material consumption is less, the high-voltage parallel capacitor group neutral line jockey that manufacturing cost is lower.
The purpose of this utility model can reach by following measure: a kind of high-voltage parallel capacitor group neutral line jockey, comprise the copper bar neutral line, the soft neutral line of aluminium, bolt, it is characterized in that: the junction between the copper bar neutral line and the soft neutral line of aluminium is provided with copper to aluminum adapter bar, and all is threaded onto on the bolt.
The purpose of this utility model can also reach by following measure:: the one side of copper to aluminum adapter bar is a copper coin, and another side is an aluminium sheet, and both are welded to each other.Bolt is made of copper.
The utility model has following advantage compared to existing technology: simple and reasonable, use the less copper to aluminum adapter bar of a kind of volume in the tie point position of copper end and aluminium end, effect embodies fast, electric property and mechanical property are good, the copper material consumption is less, manufacturing cost is lower, and can guarantee the security of operation of equipment, improves the reliability of power supply.
Description of drawings
Fig. 1 is a structure cutaway view of the present utility model.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing (embodiment):
With reference to Fig. 1, the utility model comprises the copper bar neutral line 1, the soft neutral line 2 of aluminium, bolt 3, copper to aluminum adapter bar 4 etc.Junction between the copper bar neutral line 1 and the soft neutral line 2 of aluminium is provided with the long-pending less copper to aluminum adapter bar 4 of a block, and all is threaded onto on the bolt 3.Copper to aluminum adapter bar 4 is on an end surfaces of the moderate aluminium sheet of a block size, copper coin of seam, and both become the integral body of metallurgical binding.Increase the metal of a transition in the middle of the copper aluminum metal, make it reach two kinds of metals and do not need direct-connected requirement.Bolt (3) adopts copper material to make.
In addition under normal circumstances, the neutral line is the theory state that is in zero current.In order to ensure the neutral line under normal circumstances is zero current condition, just must rearrange combination to capacitor, promptly each condenser capacitance value of original capacitor group is recomputated by the principle of three-phase equilibrium and distribute, three phase capacitance value capacitor group in a basic balance is formed in the rational position of layout again.Like this, just can guarantee that equipment normally moves and prevent the heating phenomenon that eddy current causes.
Claims (3)
1. high-voltage parallel capacitor group neutral line jockey, comprise the copper bar neutral line (1), the soft neutral line of aluminium (2), bolt (3), it is characterized in that: the junction between the copper bar neutral line (1) and the soft neutral line of aluminium (2) is provided with copper to aluminum adapter bar (4), and all is threaded onto on the bolt (3).
2. high-voltage parallel capacitor group neutral line jockey according to claim 1, it is characterized in that: the one side of copper to aluminum adapter bar (4) is a copper coin, and another side is an aluminium sheet, and both are welded to each other.
3. high-voltage parallel capacitor group neutral line jockey according to claim 1, it is characterized in that: bolt (3) is made of copper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205254035U CN201829629U (en) | 2010-09-08 | 2010-09-08 | Neutral wire connecting device of high-voltage parallel capacitor group |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205254035U CN201829629U (en) | 2010-09-08 | 2010-09-08 | Neutral wire connecting device of high-voltage parallel capacitor group |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201829629U true CN201829629U (en) | 2011-05-11 |
Family
ID=43968147
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205254035U Expired - Fee Related CN201829629U (en) | 2010-09-08 | 2010-09-08 | Neutral wire connecting device of high-voltage parallel capacitor group |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201829629U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110587054A (en) * | 2019-09-23 | 2019-12-20 | 天津市特变电工变压器有限公司 | Welding process of aluminum flat wire and copper stranded wire for oil-immersed distribution transformer product |
-
2010
- 2010-09-08 CN CN2010205254035U patent/CN201829629U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110587054A (en) * | 2019-09-23 | 2019-12-20 | 天津市特变电工变压器有限公司 | Welding process of aluminum flat wire and copper stranded wire for oil-immersed distribution transformer product |
| CN110587054B (en) * | 2019-09-23 | 2021-12-14 | 天津市特变电工变压器有限公司 | Welding process of aluminum flat wire and copper stranded wire for oil-immersed distribution transformer product |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110511 Termination date: 20110908 |