CN105301550A - Split series combined voltage transformer - Google Patents
Split series combined voltage transformer Download PDFInfo
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- CN105301550A CN105301550A CN201510844656.6A CN201510844656A CN105301550A CN 105301550 A CN105301550 A CN 105301550A CN 201510844656 A CN201510844656 A CN 201510844656A CN 105301550 A CN105301550 A CN 105301550A
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- transformer
- standard potential
- voltage transformer
- potential transformer
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Abstract
The invention discloses a split series combined voltage transformer. By employing the principle of a series voltage summation method, a primary winding of a non-standard voltage class 420 kV higher standard voltage transformer is connected with a primary winding of a 330 kV lower standard voltage transformer in series to form a primary winding of a combined voltage transformer, a primary winding of a high voltage isolation transformer is connected with a secondary winding of the 420 kV higher standard voltage transformer in series, and a secondary winding of the high voltage isolation transformer is connected with a secondary winding of the 330 kV lower standard voltage transformer in series so that a secondary winding of the combined voltage transformer is formed. The higher and lower standard voltage transformers are split and independent, the 420 kV higher standard voltage transformer can be lifted to a security height via an electric hydraulic system and forms a 750 kV standard voltage transformer with the 330 kV lower standard voltage transformer, and the 330 kV lower standard voltage transformer can work independently and reliably.
Description
Technical field
The present invention relates to a kind of split serial combination type voltage transformer (VT), especially can take into account the combined type standard potential transformer being applied to the error measure of 330kV and 750kV mutual inductor on site.
Background technology
At present, it is the most common for utilizing electromagnetic type standard mutual inductor to carry out 750kV voltage transformer (VT) field calibration, the most traditional method, namely with high-precision 750kV standard potential transformer for benchmark, tested mutual inductor is once in parallel with it, get both differences by transformer error tester at secondary side and obtain.But along with standard potential transformer electric pressure brings up to 750kV, the insulation system process of monomer mutual inductor is very difficult, and manufacturing process is very difficult, and price is very expensive.750kV electromagnetic type standard potential transformer separate unit is about 1 ton of weight, height 4 ~ 5 meters, need in testing ground crane closely cooperate it lifting, movement and wiring, bring many potential safety hazards, work efficiency is not high, and in transportation, bulky, heavy standard mutual inductor very easily damage.
Moreover, existing separate unit 750kV standard potential transformer only can be applied to the site error experiment of 750kV voltage transformer (VT), and from nationwide integrated power grid structure, the quantity of 750kV transformer station is far smaller than the quantity of 330kV transformer station, how to allow 750kV standard potential transformer also can be applied to the error test of 330kV mutual inductor, thus to improve plant factor, reduce work complexity, increase economic efficiency be the problem being worth further investigation.
Summary of the invention
For the problems referred to above, the invention provides a kind of rational in infrastructure, build is small and exquisite, cost low energy takes into account the split serial combination type voltage transformer (VT) being applied to the on-the-spot voltage transformer error test of 330kV and 750kV.
For achieving the above object, split serial combination type voltage transformer (VT) of the present invention, comprise: higher level's insulator, higher level's standard potential transformer, subordinate's insulator, coupling part, high_voltage isolation mutual inductor, subordinate's standard potential transformer and jacking gear, described jacking gear is provided with hoistable platform, and described higher level's insulator, higher level's standard potential transformer are arranged on described hoistable platform;
Hoistable platform is risen to safe altitude by jacking gear,
A winding of higher level's standard potential transformer and a windings in series of subordinate's standard potential transformer, a winding of composition split serial combination type voltage transformer (VT); The Secondary Winding of higher level's standard potential transformer and a windings in series of high_voltage isolation mutual inductor, the secondary windings in series of subordinate's standard potential transformer and high_voltage isolation mutual inductor, the Secondary Winding of composition split serial combination type voltage transformer (VT).
Further, the electric pressure of described higher level's standard potential transformer is 420kV, and the electric pressure of described subordinate standard potential transformer is 330kV.
Further, described jacking gear is hydraulic jacking device.
Beneficial effect
Split serial combination type voltage transformer (VT) of the present invention and method and prior art possess following beneficial effect:
Split serial combination type voltage transformer (VT) of the present invention, a winding of higher level's standard potential transformer and a windings in series of subordinate's standard potential transformer, a winding of composition split serial combination type voltage transformer (VT); The Secondary Winding of higher level's standard potential transformer and a windings in series of high_voltage isolation mutual inductor, the secondary windings in series of subordinate's standard potential transformer and high_voltage isolation mutual inductor, the Secondary Winding of composition split serial combination type voltage transformer (VT).Tandem mode is adopted to ensure that 330kV subordinate standard potential transformer and combined type 750kV standard potential transformer can independently reliably work on the one hand, improve plant factor, reduce the insulating requirements of separate unit standard mutual inductor on the other hand, effective minimizing volume and weight of the present invention, be convenient to transport, guarantee that experimental safe is reliable.
Accompanying drawing explanation
Fig. 1 is the structural drawing of split serial combination type voltage transformer (VT) of the present invention;
Fig. 2 is the circuit theory diagrams of split serial combination type voltage transformer (VT) of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention will be further described.
Embodiment
As shown in Figure 1, the present embodiment split serial combination type voltage transformer (VT), comprise: higher level's insulator, higher level's standard potential transformer, subordinate's insulator, coupling part, high_voltage isolation mutual inductor, subordinate's standard potential transformer and jacking gear, described jacking gear is provided with hoistable platform, and described higher level's insulator, higher level's standard potential transformer are arranged on described hoistable platform.
Upper and lower class B insulation and upper and lower grade standard voltage transformer (VT) relation: in high voltage standard voltage transformer (VT), its standard potential transformer part belongs to canonical measure equipment, this equipment cannot bear actual design high voltage, the insulator connected by its high-pressure side takes design high voltage, in order to avoid standard potential transformer part is burnt because of superpotential.
Hoistable platform is risen to safe altitude by jacking gear, and wherein said jacking gear is hydraulic jacking device.Jacking gear is by the safe altitude of hoistable platform by start bit rising 4m or more than 4m.
A winding of higher level's standard potential transformer and a windings in series of subordinate's standard potential transformer, a winding of composition split serial combination type voltage transformer (VT); The Secondary Winding of higher level's standard potential transformer and a windings in series of high_voltage isolation mutual inductor, the secondary windings in series of subordinate's standard potential transformer and high_voltage isolation mutual inductor, the Secondary Winding of composition split serial combination type voltage transformer (VT).
Off-standard voltage class 4 20kV higher level standard potential transformer 3 and 330kV subordinate standard potential transformer 7 superpose with cascaded structure and place.High_voltage isolation mutual inductor 6 is as the addition winding of secondary windings in series of the present invention, and effect is that the secondary voltage of upper and lower two-stage standard potential transformer is added, and exports from subordinate's standard potential transformer 7.Upper lower uniform pressure ring 1 is positioned at higher level's insulator 2 two ends, plays and improves Electric Field Distribution, improves the effect of apparatus insulated level.Higher level's insulator 2 ensures that higher level's standard potential transformer 3 insulate reliably, subordinate's insulator 4 ensures to insulate reliably between higher level's standard potential transformer 3 and subordinate's insulator 4 and high_voltage isolation mutual inductor 6, coupling part 5 connects upper and lower standard potential transformer 3, subordinate's standard potential transformer 7 and high_voltage isolation mutual inductor 6, and ensure that three parts insulate reliably.
As shown in Figure 2, the circuit theory diagrams of split serial combination type voltage transformer (VT) of the present invention, by electro-hydraulic system by 420kV higher level's standard potential transformer 3 jacking to safe altitude, its winding A
1n
1(primary side voltage U
11=420kV) with a winding A of subordinate's standard potential transformer 7
2n
2(primary side voltage U
12=330kV) series connection, form a winding AN of the present invention, the primary voltage U of cascade type instrument transformer
1=U
11+ U
12=750kV, the Secondary Winding a of higher level's standard potential transformer 3
1n
1by the Secondary Winding a of isolating transformer 6 with subordinate's standard potential transformer 7
2n
2series connection, form Secondary Winding an of the present invention, secondary voltage is U
2.
The present invention be should be understood that; above-described embodiment; further detailed description has been carried out to object of the present invention, technical scheme and beneficial effect; these are only embodiments of the invention; be not intended to limit the present invention, every within spiritual principles of the present invention, done any amendment, equivalent replacement, improvement etc.; all should be included within protection scope of the present invention, the protection domain that protection scope of the present invention should define with claim is as the criterion.
Claims (3)
1. a split serial combination type voltage transformer (VT), it is characterized in that, comprise: higher level's insulator, higher level's standard potential transformer, subordinate's insulator, coupling part, high_voltage isolation mutual inductor, subordinate's standard potential transformer and jacking gear, described jacking gear is provided with hoistable platform, and described higher level's insulator, higher level's standard potential transformer are arranged on described hoistable platform;
Jacking gear by the safe altitude of hoistable platform by start bit rising 4m or more than 4m,
A winding of higher level's standard potential transformer and a windings in series of subordinate's standard potential transformer, a winding of composition split serial combination type voltage transformer (VT); The Secondary Winding of higher level's standard potential transformer and a windings in series of high_voltage isolation mutual inductor, the secondary windings in series of subordinate's standard potential transformer and high_voltage isolation mutual inductor, the Secondary Winding of composition split serial combination type voltage transformer (VT).
2. split serial combination type voltage transformer (VT) according to claim 1, is characterized in that, the electric pressure of described higher level's standard potential transformer is 420kV, and the electric pressure of described subordinate standard potential transformer is 330kV.
3. split serial combination type voltage transformer (VT) according to claim 1, is characterized in that, described jacking gear is hydraulic jacking device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510844656.6A CN105301550A (en) | 2015-11-27 | 2015-11-27 | Split series combined voltage transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510844656.6A CN105301550A (en) | 2015-11-27 | 2015-11-27 | Split series combined voltage transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105301550A true CN105301550A (en) | 2016-02-03 |
Family
ID=55199033
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510844656.6A Pending CN105301550A (en) | 2015-11-27 | 2015-11-27 | Split series combined voltage transformer |
Country Status (1)
| Country | Link |
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| CN (1) | CN105301550A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107731488A (en) * | 2017-11-10 | 2018-02-23 | 江苏思源赫兹互感器有限公司 | A kind of more piece voltage transformer for being easy to adjust error |
| CN117147938A (en) * | 2023-09-06 | 2023-12-01 | 中山市华讯电器有限公司 | High-voltage transformer without high-voltage fuse |
Citations (6)
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|---|---|---|---|---|
| GB804915A (en) * | 1955-03-25 | 1958-11-26 | Metra Blansko | Apparatus for testing current or voltage transformers |
| CN102253257A (en) * | 2011-04-27 | 2011-11-23 | 国网电力科学研究院 | Integrated standard device for field calibration of extra/ultra high voltage capacitor voltage transformer (CVT) |
| CN103267958A (en) * | 2013-04-27 | 2013-08-28 | 广东电网公司电力科学研究院 | Circuit and method for measuring voltage transformer voltage coefficient |
| CN103730247A (en) * | 2013-12-17 | 2014-04-16 | 国家电网公司 | Full-shielding high-voltage isolated-type voltage transformer |
| CN104459274A (en) * | 2014-11-19 | 2015-03-25 | 中国计量科学研究院 | Measuring method for voltage coefficient of high voltage standard capacitor |
| CN205176251U (en) * | 2015-11-27 | 2016-04-20 | 国网宁夏电力公司电力科学研究院 | Components of a whole that can function independently tandem compound formula voltage transformer |
-
2015
- 2015-11-27 CN CN201510844656.6A patent/CN105301550A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB804915A (en) * | 1955-03-25 | 1958-11-26 | Metra Blansko | Apparatus for testing current or voltage transformers |
| CN102253257A (en) * | 2011-04-27 | 2011-11-23 | 国网电力科学研究院 | Integrated standard device for field calibration of extra/ultra high voltage capacitor voltage transformer (CVT) |
| CN103267958A (en) * | 2013-04-27 | 2013-08-28 | 广东电网公司电力科学研究院 | Circuit and method for measuring voltage transformer voltage coefficient |
| CN103730247A (en) * | 2013-12-17 | 2014-04-16 | 国家电网公司 | Full-shielding high-voltage isolated-type voltage transformer |
| CN104459274A (en) * | 2014-11-19 | 2015-03-25 | 中国计量科学研究院 | Measuring method for voltage coefficient of high voltage standard capacitor |
| CN205176251U (en) * | 2015-11-27 | 2016-04-20 | 国网宁夏电力公司电力科学研究院 | Components of a whole that can function independently tandem compound formula voltage transformer |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107731488A (en) * | 2017-11-10 | 2018-02-23 | 江苏思源赫兹互感器有限公司 | A kind of more piece voltage transformer for being easy to adjust error |
| CN107731488B (en) * | 2017-11-10 | 2024-02-23 | 江苏思源赫兹互感器有限公司 | Multisection voltage transformer convenient to adjust error |
| CN117147938A (en) * | 2023-09-06 | 2023-12-01 | 中山市华讯电器有限公司 | High-voltage transformer without high-voltage fuse |
| CN117147938B (en) * | 2023-09-06 | 2024-04-09 | 中山市华讯电器有限公司 | High-voltage transformer without high-voltage fuse |
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Application publication date: 20160203 |