CN101694810A - Antiresonant three-phase four-wire integrated casting insulated mutual inductor - Google Patents
Antiresonant three-phase four-wire integrated casting insulated mutual inductor Download PDFInfo
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- CN101694810A CN101694810A CN200910180700A CN200910180700A CN101694810A CN 101694810 A CN101694810 A CN 101694810A CN 200910180700 A CN200910180700 A CN 200910180700A CN 200910180700 A CN200910180700 A CN 200910180700A CN 101694810 A CN101694810 A CN 101694810A
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Abstract
The invention discloses an antiresonant three-phase four-wire integrated casting insulated mutual inductor. In the mutual inductor, terminals of primary winding coils of three voltage mutual inductors are mutually electrically connected, and the other terminals of the primary winding coils are respectively connected to primary connecting terminals; winding coil measuring tail ends of secondary sides of the three voltage transformers are mutually connected and used as grounding ends, and start ends thereof are respectively connected to secondary connecting terminals; protective winding coils of the secondary sides of the three voltage transformer are sequentially, serially and electrically connected in an opened triangle pattern, damping resistors are connected in series among the openings of the opened triangle, and output ends of the opened triangle formed by the serial connection are respectively connected to the secondary connecting terminals; and the three voltage mutual inductors are cast by insulation materials to form a fully enclosed casting body arranged in a shell. The mutual inductor can effectively absorb high order harmonic elements of secondary circuits by the damping function of the damping resistors so as to prevent the output circuit from resonance and prevent the transformer from being burnt down due to the ferromagnetic resonance.
Description
Technical field
The present invention relates to voltage transformer, particularly relate to a kind of three-phase and four-line integrated casting insulated mutual inductor of anti-resonance.
Background technology
Present domestic three-phase and four-line integration voltage instrument transformer has only the oil immersed type instrument transformer of 10KV, but the type product adopts insulating oil as dielectric, and easy oil leakage in the use needs often to safeguard, and safeguards inconvenience; Its inside did not have damping resistance when the instrument transformer of oil immersed type designed, and caused ferro resonance easily, caused instrument transformer to burn.
Summary of the invention
Based on above-mentioned existing in prior technology problem, the embodiment of the invention provides a kind of three-phase and four-line integrated casting insulated mutual inductor of anti-resonance, can effectively absorb the high order harmonic component composition of transformer secondary circuit, prevent that output loop generation ferro resonance from causing instrument transformer to burn, cause the anti-circuit ferro resonance ability of instrument transformer low.
The present invention is achieved through the following technical solutions:
The embodiment of the invention provides a kind of three-phase and four-line integrated casting insulated mutual inductor of anti-resonance, comprising:
Three voltage transformers, housing, damping resistance, primary connection terminal and secondary connection terminals;
A terminal of the primary winding coils of three voltage transformers is electrically connected mutually, and the another terminal of the primary winding coils of three voltage transformers is electrically connected with the primary connection terminal respectively; The secondary winding side of every voltage transformer is by measuring winding coil and protecting winding coil to form, and the measurement winding coil end of three voltage transformers interconnects and as earth terminal, top is connected to the secondary connection terminal respectively; The protection winding coil of three voltage transformers head and the tail series connection successively is the open delta mode and is electrically connected, series damping resistor between the head and end of the protection winding coil of three voltage transformers after the series connection, the first and last end of the protection winding coil of three voltage transformers after the series connection is connected to the secondary connection terminal of housing bottom respectively as output; Three voltage transformers after being electrically connected pour into totally enclosed pour mass by insulating material, and described pour mass is arranged in the housing, and described primary connection terminal and secondary connection terminal all are arranged on the housing.
Embodiment by the invention described above as can be seen; in embodiments of the present invention by series damping resistor between the output of the protection winding coil of the secondary side of three voltage transformers; damping action by damping resistance; thereby can effectively absorb the high order harmonic component composition of transformer secondary circuit; prevent output loop generation resonance; avoid taking place ferro resonance and cause instrument transformer to burn, improved the anti-circuit ferro resonance ability of instrument transformer.
Description of drawings
The generalized section of the instrument transformer that Fig. 1 provides for the embodiment of the invention;
The circuit diagram of the instrument transformer that Fig. 2 provides for the embodiment of the invention;
Each label is among the figure:
1. housing; 2. primary connection terminal; 3. primary winding coils; The measurement winding coil of secondary side and the protection winding coil; 5. damping resistance; 6. secondary connection terminal.
Embodiment
The invention will be further described below in conjunction with the drawings and specific embodiments.
Embodiment one
Present embodiment one provides a kind of three-phase and four-line integrated casting insulated mutual inductor of anti-resonance, is a kind of voltage transformer, can be used in the transmission line measuring voltage and carries out relaying protection, and as shown in Figure 1, 2, this instrument transformer comprises:
Three voltage transformer A, B, C, housing 1, damping resistance 5, primary connection terminal 2 and secondary connection terminals 6;
Wherein, three voltage transformer A, B, C are electrically connected mutually, a terminal that specifically is the primary winding coils of three voltage transformer A, B, C is electrically connected mutually, the another terminal of the primary winding coils of three voltage transformers is electrically connected with the primary connection terminal respectively, as shown in Figure 2, the primary winding coils end of three voltage transformers adopts the Y0 mode of connection to be electrically connected; The secondary winding side of every voltage transformer is by measuring winding coil and protecting winding coil to form, the measurement winding coil a of three voltage transformers, b, c (referring to Fig. 2) end interconnect and as earth terminal, top is connected to respectively on the secondary connection terminal that is arranged on housing and (generally is connected on the measurement binding post of secondary connection terminal), is electrically connected even the measurement winding coil of the secondary side of three instrument transformers also is the mode of connection of Y0; The protection winding coil of three voltage transformers (three groups of series coil da-dn among Fig. 2) head and the tail series connection successively is the open delta mode and is electrically connected, series damping resistor R is (promptly between the opening at open delta between the head and end of the protection winding coil of three voltage transformers after the series connection, as series damping resistor R between the dn of the da of an end among Fig. 2 and ground connection), the first and last end of the protection winding coil of three voltage transformers after the series connection is connected to the secondary connection terminal (generally being connected on the protection binding post of secondary connection terminal) of housing bottom respectively as output; Damping resistance can adopt three, three damping resistances are connected in parallel, three damping resistances after being connected in parallel with connect after the open delta coil that is connected to form of the protection winding coil of three voltage transformers between form in parallel, in the reality, damping resistance is arranged on the secondary connection terminal place of housing bottom, and the output of the open delta coil that the protection winding coil of three voltage transformers is connected to form is connected on the terminal at damping resistance place of housing bottom; Three voltage transformers after realization is electrically connected pour into totally enclosed pour mass by insulating material, specifically can adopt epoxy resin to pour into totally enclosed pour mass in the vacuum pouring mode, described pour mass is arranged in the housing, primary connection terminal and secondary connection terminal all are arranged on the housing, have promptly formed the three-phase and four-line integrated casting insulated mutual inductor of anti-resonance.
In the above-mentioned instrument transformer, three damping resistances can adopt the resistance of resistance at 45～60 Ω, and the resistance of three damping resistances can be all identical, or inequality.
Three voltage transformers in the above-mentioned instrument transformer can adopt three voltage transformers that capacity is all identical.Every instrument transformer is all for being made of the measurement winding coil of primary winding coils, secondary side, the protection winding coil and the iron core of secondary side, the measurement winding coil of primary winding coils and secondary side, the protection winding coil of secondary side all are arranged on the iron core, are of coupled connections by iron core; The lead-out wire of primary winding coils is as on high-tension side primary connection end; The lead-out wire of the measurement winding coil of secondary side is measured terminals as the low-pressure side secondary, and the lead-out wire of the protection winding coil of secondary side is as low-pressure side second protection terminals.
In the above-mentioned instrument transformer; owing to making the measurement winding coil be the Y0 mode of connection, the secondary low-voltage side at three voltage transformers is electrically connected; and during the protection winding coil that makes the secondary low-voltage side mode that is open delta is electrically connected; the open delta coil place that is connected to form at the protection winding coil installs damping resistance additional; utilize the damping action of damping resistance; thereby can effectively absorb the high order harmonic component composition of the transformer secondary circuit of whole formation; prevent output loop generation resonance; avoid the generation ferro resonance to cause instrument transformer to burn, effectively improved the anti-circuit ferro resonance ability of instrument transformer.And, form pour mass by the poured with epoxy resin that utilizes good insulation preformance, not only improved the insulation property of whole instrument transformer, also improved stability of structure, need not safeguard basically, only need simply wipe surface dirt and get final product.
In sum; the three-phase and four-line integrated casting insulated mutual inductor of the anti-resonance that the embodiment of the invention provides; can be used in the electric power system as voltage measurement and protection equipment; can be used as the threephase potential transformer of the antiresonance of 20KV; this instrument transformer is connected on the open delta place that the protection winding coil of three voltage transformer low-pressure sides that are electrically connected is connected to form with the damping resistance of three parallel connections; impedance by damping resistance self; thereby can effectively absorb the high order harmonic component composition of whole transformer secondary circuit; prevent output loop generation resonance; effectively protected whole instrument transformer, avoided burning because of the instrument transformer that secondary resonance causes.And also have simple in structure, safeguard the characteristics easily that save trouble.
The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claims.
Claims (7)
1. the three-phase and four-line integrated casting insulated mutual inductor of an anti-resonance is characterized in that, comprising:
Three voltage transformers, housing, damping resistance, primary connection terminal and secondary connection terminals;
A terminal of the primary winding coils of three voltage transformers is electrically connected mutually, and the another terminal of the primary winding coils of three voltage transformers is electrically connected with the primary connection terminal respectively; The secondary winding side of every voltage transformer is by measuring winding coil and protecting winding coil to form, and the measurement winding coil end of three voltage transformers interconnects and as earth terminal, top is connected to the secondary connection terminal respectively; The protection winding coil of three voltage transformers head and the tail series connection successively is the open delta mode and is electrically connected, series damping resistor between the head and end of the protection winding coil of three voltage transformers after the series connection, the first and last end of the protection winding coil of three voltage transformers after the series connection is connected to the secondary connection terminal of housing bottom respectively as output; Three voltage transformers after being electrically connected pour into totally enclosed pour mass by insulating material, and described pour mass is arranged in the housing, and described primary connection terminal and secondary connection terminal all are arranged on the housing.
2. the three-phase and four-line integrated casting insulated mutual inductor of anti-resonance as claimed in claim 1; it is characterized in that; described damping resistance is three, and three damping resistances are connected in parallel, three damping resistances after being connected in parallel with connect after the protection winding coil parallel connection of three voltage transformers.
3. the three-phase and four-line integrated casting insulated mutual inductor of anti-resonance as claimed in claim 2 is characterized in that, the resistance of described three damping resistances is all identical, is 45～60 Ω.
4. the three-phase and four-line integrated casting insulated mutual inductor of anti-resonance as claimed in claim 2 is characterized in that, the resistance of described three damping resistances is inequality, is 45～60 Ω.
5. the three-phase and four-line integrated casting insulated mutual inductor of anti-resonance as claimed in claim 1 is characterized in that, the capacity of described three voltage transformers is all identical.
6. as the three-phase and four-line integrated casting insulated mutual inductor of claim 1 or 5 described anti-resonance, it is characterized in that, described every voltage transformer is made of the measurement winding coil of primary winding coils, secondary side, the protection winding coil and the iron core of secondary side, the measurement winding coil of primary winding coils and secondary side, the protection winding coil of secondary side all are arranged on the iron core, are of coupled connections by iron core; The lead-out wire of primary winding coils is as on high-tension side primary connection end; The lead-out wire of the measurement winding coil of secondary side is measured terminals as the low-pressure side secondary, and the lead-out wire of the protection winding coil of secondary side is as low-pressure side second protection terminals.
7. as the three-phase and four-line integrated casting insulated mutual inductor of claim 1 or 5 described anti-resonance, it is characterized in that three voltage transformers after described being electrically connected pour into totally enclosed pour mass by insulating material and pour into totally enclosed pour mass for adopting epoxy resin in the vacuum pouring mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910180700A CN101694810A (en) | 2009-10-28 | 2009-10-28 | Antiresonant three-phase four-wire integrated casting insulated mutual inductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910180700A CN101694810A (en) | 2009-10-28 | 2009-10-28 | Antiresonant three-phase four-wire integrated casting insulated mutual inductor |
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| Publication Number | Publication Date |
|---|---|
| CN101694810A true CN101694810A (en) | 2010-04-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910180700A Pending CN101694810A (en) | 2009-10-28 | 2009-10-28 | Antiresonant three-phase four-wire integrated casting insulated mutual inductor |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106449072A (en) * | 2016-09-29 | 2017-02-22 | 湖北大二互科技股份有限公司 | Novel mutual inductor for automation of power distribution network |
| CN106680565A (en) * | 2017-01-19 | 2017-05-17 | 广东电网有限责任公司中山供电局 | Voltage transformer module for 10kV electric energy metering device, and electric energy metering device |
| CN109600050A (en) * | 2019-01-29 | 2019-04-09 | 重庆睿伊互感器研究院有限公司 | A kind of simple charge power supply of three-phase and four-line combination transformer |
| CN110571034A (en) * | 2019-09-12 | 2019-12-13 | 湖北大二互科技股份有限公司 | Three-phase current transformer |
-
2009
- 2009-10-28 CN CN200910180700A patent/CN101694810A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106449072A (en) * | 2016-09-29 | 2017-02-22 | 湖北大二互科技股份有限公司 | Novel mutual inductor for automation of power distribution network |
| CN106680565A (en) * | 2017-01-19 | 2017-05-17 | 广东电网有限责任公司中山供电局 | Voltage transformer module for 10kV electric energy metering device, and electric energy metering device |
| CN109600050A (en) * | 2019-01-29 | 2019-04-09 | 重庆睿伊互感器研究院有限公司 | A kind of simple charge power supply of three-phase and four-line combination transformer |
| CN110571034A (en) * | 2019-09-12 | 2019-12-13 | 湖北大二互科技股份有限公司 | Three-phase current transformer |
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Application publication date: 20100414 |