CN203338934U - 66kV grounding transformer with power distribution output for station - Google Patents
66kV grounding transformer with power distribution output for station Download PDFInfo
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- CN203338934U CN203338934U CN2013203445703U CN201320344570U CN203338934U CN 203338934 U CN203338934 U CN 203338934U CN 2013203445703 U CN2013203445703 U CN 2013203445703U CN 201320344570 U CN201320344570 U CN 201320344570U CN 203338934 U CN203338934 U CN 203338934U
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- secondary winding
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Abstract
The utility model relates to the field of 66kV grounding transformers with power distribution output for a station, in particular to a 66kV grounding transformer with power distribution output for the station. The 66kv grounding transformer comprises a main winding, an iron core and a neutral point, and is characterized in that a single device body structure of the three-phase three-column type iron core is adopted, a secondary winding serves for power distribution output of an auxiliary power source in the station and a power source used for the station, a zigzag connecting wire is adopted on the main winding side, a star-shaped connecting wire is adopted on the secondary winding side, a zero phase is led out of both the main winding and the secondary winding, the nominal voltage of the secondary winding which is arranged close to the iron core is 0.4kV, and the nominal voltage of the main winding which is arranged on the outer layer of the secondary winding is 66kV. Compared with the prior art, the 66kV grounding transformer has the advantages of being applicable to a three-phase power system with the insulative neutral point, providing power sources for electric equipment in the transformer substation through the secondary winding, saving a large amount of material cost, and being small in occupied area, low in electric energy loss and small in equipment investment.
Description
Technical field
The utility model relates to 66 kv substations and uses the grounding transformer field, relates in particular to the grounding transformer of a kind of 66 kilovolts of tape stations with distribution output.
Background technology
At present traditional 66 kilovolts of grounding transformers and 66 kilovolts of stations are all to adopt split-type design with transformer, need 2 equipment intervals, 2 cover switch cubicles, this grounding transformer is used in the three-phase electrical power system of neutral point insulation, an artificial neutral point can be provided, and utilize this neutral point that grounding through arc is installed, stand simultaneously and also solved the problem of electricity consumption in the station with transformer.But because the whole system floor space is larger, energy loss is large, and equipment investment is large, and maintenance cost is large, and operating safety factor is low, so do not reach optimum efficiency in electrical operation.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, provide a kind of rational in infrastructure, the grounding transformer of distribution output for 66 kilovolts of tape stations of single device body band secondary winding structure of function admirable, save floor occupying area, and reduces energy loss and equipment investment and maintenance cost.
For achieving the above object, the technical solution adopted in the utility model is:
The grounding transformer of distribution output for a kind of 66 kilovolts of tape stations, comprise main winding, iron core and neutral point, it is the single machine body structure that adopts three phase three limb core, with use the secondary winding of the distribution output of power supply as stand interior accessory power supply and station, described main winding side adopts the indentation wiring, the secondary winding side adopts star-star connection, main winding and secondary winding are all drawn zero phase, wherein the secondary winding rated voltage is 0.4 kilovolt, near unshakable in one's determination, arrange, the main winding rated voltage is 66 kilovolts, is arranged in the skin of secondary winding.
Described main winding adopts cylinder mode, is divided into two parts of equal turn numbers, i.e. main winding I and main winding II, and main winding I and main winding II are equipped with the shunting tap for non-excitation pressure adjustment.
Described secondary winding is cylinder mode or sped structure.
Compared with prior art, the beneficial effects of the utility model are: 1) be applicable to, in the three-phase electrical power system of neutral point insulation, not only can utilize neutral by arc extinction coil grounding, also with secondary winding, double as station and use with distribution transformer, for power consumption equipment in transformer station provides power supply.2) economize next unshakable in one's determination, fuel tank, three main winding sleeve pipes and some transformers oil than transformer for split type grounding transformer and station, thereby save the lot of materials cost, have advantages of that floor space is little, energy loss is little, equipment investment is little.
The accompanying drawing explanation
Fig. 1 is the utility model example structure schematic diagram;
Fig. 2 is the vertical view of Fig. 1;
Fig. 3 is the utility model embodiment winding arrangement structure schematic diagram;
Fig. 4 is the utility model embodiment winding connection diagram.
In figure: 1-hangs and mixes 2-off circuit tap changer 3-main winding A, B, C phase output terminal 4-main winding O phase output terminal 5-secondary winding output 6-fuel tank 7-radiator fin 8-pressure relief valve 9-footing 10-dehydrating breather 11-fuel outlet valve 12-Buchholz relay 13-oil level indicator 14-oil conservator
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is described further:
See Fig. 1 to Fig. 4, the grounding transformer example structure schematic diagrames of a kind of 66 kilovolts of tape stations of the utility model with distribution output, it is the single machine body structure that adopts three phase three limb core, distribution output with secondary winding as accessory power supply in station, casing is provided with fuel tank 6, radiator fin 7, footing 9 mixes 1 with hanging, the casing top is provided with main winding A, B, C phase output terminal 3, main winding O phase output terminal 4, off circuit tap changer 2 and secondary winding output 5, off circuit tap changer 2 is for realizing non-excitation pressure adjustment, secondary winding is drawn by the combined type sleeve pipe, the o of secondary winding, a, b, c distinguishes 0.4 KV distribution system in access station mutually, main winding is drawn by condenser-type terminal, and the A of main winding, B, C access in the electric power system that rated voltage is 66 kilovolts mutually, and O passes through grounding through arc mutually.The side top of fuel tank 6 is provided with oil conservator 14, and oil conservator is provided with oil level indicator 13, between oil conservator 14 and fuel tank 6, is provided with Buchholz relay 12, and the top of fuel tank 6 connects dehydrating breather 10, and the bottom of fuel tank connects fuel outlet valve 11.The top of casing also is provided with pressure relief valve 8.
Main winding adopts cylinder mode, is divided into two parts of equal turn numbers, i.e. main winding I and main winding II, and for meeting voltage ripple of power network, main winding I and main winding II are equipped with the shunting tap for non-excitation pressure adjustment.Secondary winding can adopt cylinder mode or sped structure according to the size of capacity.
The main winding side adopts the indentation wiring, the secondary winding side adopts star-star connection, main winding and secondary winding are all drawn zero phase, wherein the secondary winding rated voltage is 0.4 kilovolt, and voltage is lower, near unshakable in one's determination, arranges, the main winding rated voltage is 66 kilovolts, voltage is higher, is arranged in the skin of secondary winding, can effectively save insulation distance like this.
Claims (3)
1. the grounding transformer of distribution output for 66 kilovolts of tape stations, comprise main winding, iron core and neutral point, it is characterized in that, it is the single machine body structure that adopts three phase three limb core, with use the secondary winding of the distribution output of power supply as stand interior accessory power supply and station, described main winding side adopts the indentation wiring, the secondary winding side adopts star-star connection, main winding and secondary winding are all drawn zero phase, wherein the secondary winding rated voltage is 0.4 kilovolt, near unshakable in one's determination, arrange, the main winding rated voltage is 66 kilovolts, is arranged in the skin of secondary winding.
2. the grounding transformer that for a kind of 66 kilovolts of tape stations according to claim 1, distribution is exported, it is characterized in that, described main winding adopts cylinder mode, the two parts that are divided into equal turn numbers, be main winding I and main winding II, main winding I and main winding II are equipped with the shunting tap for non-excitation pressure adjustment.
3. the grounding transformer of distribution output for a kind of 66 kilovolts of tape stations according to claim 1, is characterized in that, described secondary winding is cylinder mode or sped structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203445703U CN203338934U (en) | 2013-06-17 | 2013-06-17 | 66kV grounding transformer with power distribution output for station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203445703U CN203338934U (en) | 2013-06-17 | 2013-06-17 | 66kV grounding transformer with power distribution output for station |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203338934U true CN203338934U (en) | 2013-12-11 |
Family
ID=49707598
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013203445703U Expired - Lifetime CN203338934U (en) | 2013-06-17 | 2013-06-17 | 66kV grounding transformer with power distribution output for station |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203338934U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103310960A (en) * | 2013-06-17 | 2013-09-18 | 国家电网公司 | 66-kilovolt power distribution output grounding transformer for coil station |
| CN106783085A (en) * | 2016-12-05 | 2017-05-31 | 德阳新源电器有限责任公司 | Low-voltage three-phase load autobalance transformer |
| CN110491659A (en) * | 2019-07-22 | 2019-11-22 | 辽宁中能电力实业集团有限责任公司 | 66kV(110kV) voltage class wind power generation boosting transformer |
-
2013
- 2013-06-17 CN CN2013203445703U patent/CN203338934U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103310960A (en) * | 2013-06-17 | 2013-09-18 | 国家电网公司 | 66-kilovolt power distribution output grounding transformer for coil station |
| CN106783085A (en) * | 2016-12-05 | 2017-05-31 | 德阳新源电器有限责任公司 | Low-voltage three-phase load autobalance transformer |
| CN110491659A (en) * | 2019-07-22 | 2019-11-22 | 辽宁中能电力实业集团有限责任公司 | 66kV(110kV) voltage class wind power generation boosting transformer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131211 |