CN103310960A - 66-kilovolt power distribution output grounding transformer for coil station - Google Patents
66-kilovolt power distribution output grounding transformer for coil station Download PDFInfo
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- CN103310960A CN103310960A CN2013102381342A CN201310238134A CN103310960A CN 103310960 A CN103310960 A CN 103310960A CN 2013102381342 A CN2013102381342 A CN 2013102381342A CN 201310238134 A CN201310238134 A CN 201310238134A CN 103310960 A CN103310960 A CN 103310960A
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Abstract
The invention relates to the field of 66-kilovolt grounding transformers for transformer substations, in particular to a 66-kilovolt power distribution output grounding transformer for a coil station. The 66-kilovolt power distribution output grounding transformer comprises a main winding, an iron core and a neutral point, and is characterized in that a single transformer body structure adopting a three-phase three-column type iron core is adopted; a secondary winding is taken as power distribution output of an installation auxiliary power supply and a power supply for the station; zigzag wiring is adopted on a main winding side, and star-shaped wiring is adopted on a secondary winding side; both the main winding and the secondary winding lead out the phase zero; the rated voltage of the secondary winding is 0.4 kilovolt and is arranged close to the iron core; and the rated voltage of the main winding is 66 kilovolts and is arranged on the outer layer of the secondary winding. Compared with the prior art, the 66-kilovolt power distribution output grounding transformer for the coil station has the benefits as follows: 1), A three-phase power system applicable to neutral point insulation is provided with the secondary winding, and the power supply is provided for an electric device in a transformer substation; and 2), the costs of a large amount of materials are saved, and the transformer has the advantages of small occupied area and little electric energy loss and equipment investment.
Description
Technical field
The present invention relates to 66 kv substations and use the grounding transformer field, relate in particular to the grounding transformer that a kind of 66 kilovolts of tape stations export with distribution.
Background technology
At present traditional 66 kilovolts of grounding transformers and 66 kilovolts of stations all are 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 bigger, energy loss is big, and equipment investment is big, and maintenance cost is big, and operating safety factor is low, so do not reach optimum efficiency in electrical operation.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, provide a kind of rational in infrastructure, 66 kilovolts of tape stations of single device body band secondary winding structure of function admirable save floor occupying area with the grounding transformer of distribution output, reduce energy loss and equipment investment and maintenance cost.
For achieving the above object, the technical solution used in the present invention is:
The grounding transformer that a kind of 66 kilovolts of tape stations export with distribution, comprise main winding, iron core and neutral point, it is the single machine body structure that adopts three phase three limb core, having secondary winding exports with the distribution of power supply as accessory power supply in the station and station, described main winding side adopts the indentation wiring, the secondary winding side adopts star-star connection, main winding all draws zero mutually with secondary winding, wherein the secondary winding rated voltage is 0.4 kilovolt, arrange near unshakable in one's determination, 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 can adopt cylinder mode or sped structure according to the size of capacity.
Compared with prior art, the invention has the beneficial effects as follows: 1) be applicable in the three-phase electrical power system of neutral point insulation, not only
Can utilize neutral by arc extinction coil grounding, also have secondary winding, use with distribution transformer at the double as station, for power consumption equipment in the transformer station provides power supply.2) economize next unshakable in one's determination, fuel tank, three main winding sleeve pipes and part transformer oil than split type grounding transformer and station with transformer, thereby save the lot of materials cost, have the advantage that floor space is little, energy loss is little, equipment investment is little.
Description of drawings
Fig. 1 is embodiment of the invention structural representation;
Fig. 2 is the vertical view of Fig. 1;
Fig. 3 is embodiment of the invention winding arrangement architecture schematic diagram;
Fig. 4 is embodiment of the invention winding connection diagram.
Among the 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 the specific embodiment of the present invention is described further:
See Fig. 1 to Fig. 4, it is the grounding transformer example structure schematic diagram that a kind of 66 kilovolts of tape stations of the present invention export with distribution, it is the single machine body structure that adopts three phase three limb core, have secondary winding as the distribution output of accessory power supply in the 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 used 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 the access station mutually; Main winding is drawn by condenser-type terminal, and it is that O passes through grounding through arc mutually in 66 kilovolts the electric power system that the A of main winding, B, C insert rated voltage mutually.The side top of fuel tank 6 is provided with oil conservator 14, and oil conservator is provided with oil level indicator 13, is provided with Buchholz relay 12 between oil conservator 14 and the fuel tank 6, 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 satisfying 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 all draws zero mutually with secondary winding, wherein the secondary winding rated voltage is 0.4 kilovolt, and voltage is lower, arranges near unshakable in one's determination, 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. 66 kilovolts of tape stations are with the grounding transformer of distribution output, 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, having secondary winding exports with the distribution of power supply as accessory power supply in the station and station, described main winding side adopts the indentation wiring, the secondary winding side adopts star-star connection, main winding all draws zero mutually with secondary winding, wherein the secondary winding rated voltage is 0.4 kilovolt, arrange that near unshakable in one's determination the main winding rated voltage is 66 kilovolts, is arranged in the skin of secondary winding.
2. a kind of 66 kilovolts of tape stations according to claim 1 are with the grounding transformer of distribution output, 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. a kind of 66 kilovolts of tape stations according to claim 1 is characterized in that with the grounding transformer of distribution output described secondary winding can adopt cylinder mode or sped structure according to the size of capacity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013102381342A CN103310960A (en) | 2013-06-17 | 2013-06-17 | 66-kilovolt power distribution output grounding transformer for coil station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013102381342A CN103310960A (en) | 2013-06-17 | 2013-06-17 | 66-kilovolt power distribution output grounding transformer for coil station |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103310960A true CN103310960A (en) | 2013-09-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013102381342A Pending CN103310960A (en) | 2013-06-17 | 2013-06-17 | 66-kilovolt power distribution output grounding transformer for coil station |
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| CN (1) | CN103310960A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106786636A (en) * | 2015-11-19 | 2017-05-31 | 中国石油化工股份有限公司 | A kind of power network neutral point flexible ground current compensation system |
| WO2023004962A1 (en) * | 2021-07-27 | 2023-02-02 | 吴江变压器有限公司 | Grounding transformer comprising secondary winding |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06275444A (en) * | 1993-03-24 | 1994-09-30 | Toshiba Corp | Gas insulated transformer |
| CN201060724Y (en) * | 2007-07-04 | 2008-05-14 | 石家庄天盾电气有限公司 | Stereo wound core grounding transformer |
| CN203242482U (en) * | 2013-03-23 | 2013-10-16 | 辽宁华冶集团发展有限公司 | 66 kilovolt grounding and station transformer |
| CN203338934U (en) * | 2013-06-17 | 2013-12-11 | 国家电网公司 | 66kV grounding transformer with power distribution output for station |
-
2013
- 2013-06-17 CN CN2013102381342A patent/CN103310960A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06275444A (en) * | 1993-03-24 | 1994-09-30 | Toshiba Corp | Gas insulated transformer |
| CN201060724Y (en) * | 2007-07-04 | 2008-05-14 | 石家庄天盾电气有限公司 | Stereo wound core grounding transformer |
| CN203242482U (en) * | 2013-03-23 | 2013-10-16 | 辽宁华冶集团发展有限公司 | 66 kilovolt grounding and station transformer |
| CN203338934U (en) * | 2013-06-17 | 2013-12-11 | 国家电网公司 | 66kV grounding transformer with power distribution output for station |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106786636A (en) * | 2015-11-19 | 2017-05-31 | 中国石油化工股份有限公司 | A kind of power network neutral point flexible ground current compensation system |
| WO2023004962A1 (en) * | 2021-07-27 | 2023-02-02 | 吴江变压器有限公司 | Grounding transformer comprising secondary winding |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130918 |