CN2148382Y - Arc-extinguishing transformer - Google Patents
Arc-extinguishing transformer Download PDFInfo
- Publication number
- CN2148382Y CN2148382Y CN 92240977 CN92240977U CN2148382Y CN 2148382 Y CN2148382 Y CN 2148382Y CN 92240977 CN92240977 CN 92240977 CN 92240977 U CN92240977 U CN 92240977U CN 2148382 Y CN2148382 Y CN 2148382Y
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- transformer
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Abstract
The utility model relates to an arc suppression transformer used for the neutral point earthing of a power network. An iron core with four poles is arranged in an oil tank 1, wherein, three core poles are sheathed in the three-phase coil curl of a transformer with Z-shaped wirings. The two parts of each phase of the coil curl are positioned on the different segments of the core poles. Another core pole is sheathed in a neutral point induction coil. The utility model is a single equipment, has the advantages of convenient installation and adjustment, less capital cost, strong anti-tuning syntony ability, and can save copper wires by 15% to 30%.
Description
The utility model relates to a kind of power network neutral ground device, particularly a kind of arc suppression transformer.
The 6-10KV power network will improve this class mains supply operational reliability greatly if adopt the neutral by arc extinction coil grounding mode.Since general power plant, transformer station 220,110,6 or 10KV side winding of 35KV power supply main transformer be delta connection, the non-transformer neutral point is to realize the neutral by arc extinction coil grounding mode, needs installing three-phase compensation of ground device.Domestic extensive employing at present be that a three-phase three-column core does not have the Z-shaped wiring transformer of paying winding, draw the high pressure neutral point, insert arc suppression coil over the ground in neutral point, constitute arc suppression transformer.This device is that two equipment constitute, and needs the installing special switch at interval, Installation and Debugging inconvenience, and the capital cost height, and anti-resonance tuning characteristic is poor.
The purpose of this utility model provides and a kind ofly is made of single equipment, and capital cost is lower, Installation and Debugging are convenient and arc suppression transformer with stronger anti-resonance tuning ability.
The utility model is to establish four column iron cores in the fuel tank, three Z-shaped wiring transformer three-phase coils of stem stem suit wherein, and two parts of every phase coil are positioned on the different sections of stem stem, suit neutral point inductance coil on another stem stem.
The utility model is a single equipment, and Installation and Debugging are convenient, saves capital cost.Wherein the coil of Z-shaped wiring transformer divides two sections coilings, increases X
TOValue and d
KValue.During action, three-phase coil is respectively by equidirectional 1/3rd electric currents, and the magnetic potential direction that two sections coils of same stem stem produce is opposite, produces big leakage field, makes X
TOBigger.Simultaneously, leakage field radially constitutes magnetic loop through tank envelope in coil, produces magnetic hysteresis eddy current loss at tank envelope, makes equivalent R
KIncrease, thereby d
KBe worth bigger.Move under the light load because of the utility model was in very in most running times, only just move band at full capacity when the power network single-phase earthing, peak load is the maximum current operating current during action down separately.According to present domestic regulation, the maximum maximum duration of moving continuously down at full capacity was by design in 2 hours.Therefore, the utility model adopts and increases d
KThe design of value is that reasonably it not only satisfies relevant rules requirement, and has stronger anti-resonance tuning characteristic.Because X
TOValue increases, and can reduce the design of neutral point inductive capacity, improves whole installed capacity and distributes, and can save copper cash.Because coil is that two sections branches are arranged, radiating condition is good, and its current in wire density value can suitably improve, and also can save the copper cash consumption.The arc suppression transformer of the utility model and present two assemblings is relatively saved copper cash 15-30%.
Fig. 1 is the utility model winding diagram.
Fig. 2 is the utility model core body figure.
Fig. 3 is the utility model device body installation diagram.
T among Fig. 1
OBe Z-shaped wiring transformer, L
OBe neutral point inductance, K
TBe high-voltage tap changer.T
O, L
O, K
TBe loaded in the fuel tank 1, the fuel tank panel is provided with A, B, C, O, J five outdoor type high voltage porcelain bushings pipe and K
TAdjusting handle separately.Other has little fuel tank 4, in establish low pressure small inductor L
F, the low-voltage variation capacitor C
FThe little step-up transformer T of (1 μ F, 400V) low pressure
FWith low pressure shunting switch K
F, constitute modulating and testing device.Install F, P, three low pressure outdoor types of M porcelain bushing on the modulating and testing device panel.WL
FValue is designed to WL.Below 0.5% of value.A, B, C are connected to a side of three-phase high-voltage disconnecting link 2, and J is connected to an end of high-tension fuse 3, another termination of high-tension fuse F end, and M holds ground connection.When putting into operation, close the three-phase high-voltage disconnecting link earlier, after close high-tension fuse, when out of service, divide earlier high-tension fuse, the three-phase high-voltage disconnecting link is divided in the back.Therefore the dedicated operations switch gap need be set.Compensation current is by K
TRegulate.
As shown in Figure 2, the utility model iron core is one four column iron core.The Z-shaped wiring transformer three-phase coil of stem stem 5,6,7 suits, iron core 8,9,10,11 constitute band air gap stem stem suit neutral point inductance coil, and 17,18,19 is air gap.Iron core 5,6,7,8 is identical with old-fashioned distribution transformer iron core iron yoke lamination overlap joint with the lamination overlap joint of iron yoke 12,13,14,16. Iron yoke 14 and 15 do not overlap, and carvel joint is arranged between them, leave the 1-2mm air gap.Upper clamping piece is designed to punish disconnected two at this carvel joint, and lower clamping piece is one.During assembling, iron core 5,6,7,8 and iron yoke 12,16 closed assemblies is good, fastening with lower clamping piece, Z-shaped wiring transformer three-phase coil of suit and installing end winding cross-over block, closed assembly iron yoke 13,14 then, fastening upper right folder, installing iron core 9,10, suit neutral point inductance coil and cross-over block, the iron core 11 that upper left folder is fixing is loaded onto with the parts cover of iron yoke 15 closed assemblies, refill and establish cross-over block and pressure ring, fastening upper left folder.At last, with two upper clamping piece bolted.
Claims (1)
1, a kind of arc suppression transformer is characterized in that establishing in the fuel tank 1 four column iron cores, three Z-shaped wiring transformer three-phase coils of stem stem suit wherein, and two parts of every phase coil are positioned on the different sections of stem stem, suit neutral point inductance coil on another stem stem.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92240977 CN2148382Y (en) | 1992-11-19 | 1992-11-19 | Arc-extinguishing transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92240977 CN2148382Y (en) | 1992-11-19 | 1992-11-19 | Arc-extinguishing transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2148382Y true CN2148382Y (en) | 1993-12-01 |
Family
ID=33781175
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92240977 Expired - Fee Related CN2148382Y (en) | 1992-11-19 | 1992-11-19 | Arc-extinguishing transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2148382Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110033936A (en) * | 2019-05-14 | 2019-07-19 | 云南电网有限责任公司电力科学研究院 | A kind of compound ground connection arc |
-
1992
- 1992-11-19 CN CN 92240977 patent/CN2148382Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110033936A (en) * | 2019-05-14 | 2019-07-19 | 云南电网有限责任公司电力科学研究院 | A kind of compound ground connection arc |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |