CN203289368U - Novel multiple-power source independent superposition excitation device - Google Patents
Novel multiple-power source independent superposition excitation device Download PDFInfo
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- CN203289368U CN203289368U CN2013203033864U CN201320303386U CN203289368U CN 203289368 U CN203289368 U CN 203289368U CN 2013203033864 U CN2013203033864 U CN 2013203033864U CN 201320303386 U CN201320303386 U CN 201320303386U CN 203289368 U CN203289368 U CN 203289368U
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Abstract
The utility model discloses a novel multiple-power source independent superposition excitation device comprising an alternating current power source (1), an electronic power switch (2), a three-winding excitation transformer (3), an external alternating current power source (4), a first rectifier (6), an excitation regulator AVR1 (5), a deexcitation resistor (7), a second rectifier (8), a forced excitation power source (9), an electronic power switch (11), an excitation winding (12), and a generator set (13). A high-voltage winding (3-1) of the excitation transformer (3) is connected with a generator terminal of the generator (13); a low-voltage winding (3-3) of the excitation transformer is connected with the first rectifier (6), an output end of the rectifier (6) being connected with the excitation winding (12); a medium-voltage winding (3-2) of the excitation transformer is connected with the forced excitation power source (9); the external alternating current power source (4) is connected with the forced excitation power source (9); one end of the excitation regulator AVR1 (5) is connected with an output end of the low-voltage winding (3-3) and the other end is connected with the first rectifier (6); and one end of an excitation regulator AVR2 (10) is connected with an output end of the medium-voltage winding (3-2) and the other end is connected with the second rectifier (8).
Description
Technical field
The utility model relates to a kind of many power supplys novel excitation unit that independently superposes, and belongs to the application of electrical engineering.
Background technology
Excitation system is as the important component part of generator unit, for the stable reliable guarantee that provides of electric power system is provided.Along with the development of large unit electrical network, the requirement of encouraging by force ability under failure condition is further improved, the ability of encouraging is subject to the restriction of excitation parameter, structural factor and governing factor by force in actual design, can not arrive designing requirement.Particularly under the shunt self excitation mode, its exciting voltage is subject to the impact of generator terminal voltage, makes to encourage by force performance and further weaken.In existing unit,, in order to reach very high excitation forcing ratio, paid very high cost, such as the capacity that increases rectifier transformer, the rectifier that uses high standard, overvoltage protection of multiple complexity etc.In a word, be to deal with the very little demand of encouraging by force of probability with hundred-percent online deposit, long-term mode operation with a kind of poor efficiency.
In addition, from the shunt excitation magnetism excitation system harmonic pollution problem that exists in service.The harmonic pollution that in self-shunt excitation system, the use of thyristor brings, often make excitation transformer burn because of excess Temperature, so in excitation system, the inhibition of harmonic wave has practical significance.
In sum, the solution of the problems of excitation system can ascribe the change of encouraging by force mode to.
Summary of the invention
The purpose of this utility model is that a kind of many power supplys novel excitation unit that independently superposes is provided for the deficiencies in the prior art, be characterized in traditional ready mode is encouraged by force and changed present off-line backup type into and encourage by force, can greatly reduce place capacity, suppress harmonic pollution, provide the unrestricted superpower ability of encouraging for system.
The purpose of this utility model realizes by following technical measures,
Many power supplys novel excitation unit that independently superposes comprises AC power, electronic power switch, three winding excitation transformers, external AC power supply, the first rectifier, field regulator AVR1, de-excitation resistance, the second rectifier, the forced exciting power supply, electronic power switch, excitation winding, generator unit; The high pressure winding of excitation transformer is connected with the Generator end, and the low pressure winding is connected with the first rectifier, and rectifier output is connected with excitation winding, and middle pressure winding is connected with the forced exciting power supply, and external AC power supply is connected with the forced exciting power supply.The end of field regulator AVR1 is connected with the output of low pressure winding, and the other end is connected with the first rectifier; Field regulator AVR2 one end is connected with middle pressure winding output, and the other end is connected with the second rectifier.
The AC power of described external AC power supply is connected with the AC of the second rectifier by electronic power switch.
The second rectifier of described forced exciting power supply is connected with pressure winding in excitation transformer by electronic power switch, on the middle pressure winding of excitation transformer, the high-order harmonic filtering circuit is set, and forms the screen between the high-low pressure winding.
The utlity model has following advantage:
1 adopts independent superposing type to encourage by force, has removed the excitation transformer capacity and has encouraged by force the binding of ability,, encouraging by force under the ceiling voltage prerequisite of the high multiple of assurance, has reduced the capacity of corresponding excitation transformer.
What 2 external AC power supplies can provide the superelevation multiple encourages by force ceiling voltage, can guarantee the excitation stability of large capacity electrical network.
3 adopt three around excitation transformer, on middle pressure winding, the high order filter circuit are set, and form the screen between the high-low pressure winding, stop the high order harmonic component transmission, can effectively reduce harmonic pollution.
Description of drawings
Fig. 1 is structure principle chart of the present utility model
1 AC power, 2 electronic power switches, 3 three winding excitation transformers, 4 external AC power supplies, 6 first rectifiers, 5. field regulator AVR1,7 de-excitation resistances, 8 second rectifiers, 9 forced exciting power supplys, 10. field regulator AVR2,11. electronic power switches, 12. excitation winding, 13. generator units.
Fig. 2 is three winding excitation transformer schematic diagrams
3-1 high pressure winding, press winding in 3-2,3-3 low pressure winding, 3-4 high-order harmonic filtering circuit.
Embodiment
Below by embodiment, the utility model is specifically described, but can not be interpreted as restriction to the utility model protection range.
Embodiment:
Many power supplys novel excitation unit that independently superposes comprises AC power 1, electronic power switch 2, three winding excitation transformers 3, external AC power supply 4, the first rectifier 6, field regulator AVR15, de-excitation resistance 7, the second rectifiers 8, forced exciting power supply 9, electronic power switch 11, excitation winding 12, generator unit 13; The high pressure winding 3-1 of excitation transformer 3 is connected with generator 13 machine ends, takes the input power of generator terminal voltage as rectifier; Low pressure winding 3-3 is connected with the first rectifier 5, and rectifier 6 outputs are connected with excitation winding 12; Middle pressure winding 3-2 is connected with forced exciting power supply 9, and external AC power supply 4 is connected with forced exciting power supply 9.The end of field regulator AVR15 is connected with the output of low pressure winding 3-3, and the other end is connected with the first rectifier 6, plays the regulating action to rectifier 6.
The AC power 1 of described external AC power supply 4 is connected with the AC of the second rectifier 8 by electronic power switch 2.Can provide unrestricted superpower exciting voltage to system, when system needs very high field-forcing voltage, after electronic power switch 2 is received trigger command,, with AC power 1 access, increase rectifier 8 AC voltages, export higher exciting voltage.
The second rectifier 8 of described forced exciting power supply 9 is connected with pressure winding 3-2 in excitation transformer 3 by electronic power switch 11, the DC side parallel of the DC side of rectifier 8 and rectifier 6.After electronic power switch 11 is received and encouraged order by force, system will enter and encourage by force state, and rectifier 8 puts into operation, and rectifier bridge 6 is forced to turn-off; Field regulator AVR210 one end is connected with middle pressure winding 3-2 output, and the other end is connected with the second rectifier 8, plays the effect of regulating exciting voltage.
On the middle pressure winding 3-2 of described excitation transformer 3, high-order harmonic filtering circuit 3-4 is set, forms the screen between the high-low pressure winding, stop the harmonic propagation between electrical network and excitation system, effectively reduce harmonic pollution.
Also be provided with de-excitation resistance 7 in excitation unit, by the coordination access de-excitation resistance of field suppression switch HK, protection generator amature.
Above demonstration and described basic principle of the present utility model, principal character and advantage of the present utility model.The technical staff of the industry should understand; the utility model is not restricted to the described embodiments; that describes in above-described embodiment and specification just illustrates principle of the present utility model; the utility model also has various changes and modifications under the prerequisite that does not break away from the utility model spirit and scope, and these changes and improvements all fall in claimed the utility model scope.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (3)
1. the novel excitation unit that independently superposes of power supply more than a kind, is characterized in that this device comprises AC power (1), electronic power switch (2), three winding excitation transformers (3), external AC power supply (4), the first rectifier (6), field regulator AVR1(5), de-excitation resistance (7), the second rectifier (8), forced exciting power supply (9), electronic power switch (11), excitation winding (12), generator unit (13); The high pressure winding (3-1) of excitation transformer (3) is connected with generator (11) machine end, low pressure winding (3-3) is connected with the first rectifier (6), rectifier (6) output is connected with excitation winding (12), middle pressure winding (3-2) is connected with forced exciting power supply (9), external AC power supply (4) is connected with forced exciting power supply (9), field regulator AVR1(5) a end is connected with the output of low pressure winding (3-3), and the other end is connected with the first rectifier (6); Field regulator AVR2(10) end is connected with middle pressure winding (3-2) output, and the other end is connected with the second rectifier (8).
2. many power supplys novel excitation unit that independently superposes according to claim 1, is characterized in that the AC power (1) of external AC power supply (4) is connected with the AC of the second rectifier (8) by electronic power switch (2).
3. the described many power supplys of the claim 1 novel excitation unit that independently superposes, is characterized in that second rectifier (8) of forced exciting power supply (9) is connected with pressure winding (3-2) in excitation transformer (3) by electronic power switch (11); On the middle pressure winding (3-2) of excitation transformer (3), high-order harmonic filtering circuit (3-4) is set, forms the screen between the high-low pressure winding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203033864U CN203289368U (en) | 2013-05-29 | 2013-05-29 | Novel multiple-power source independent superposition excitation device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203033864U CN203289368U (en) | 2013-05-29 | 2013-05-29 | Novel multiple-power source independent superposition excitation device |
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| Publication Number | Publication Date |
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| CN203289368U true CN203289368U (en) | 2013-11-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2013203033864U Expired - Fee Related CN203289368U (en) | 2013-05-29 | 2013-05-29 | Novel multiple-power source independent superposition excitation device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105099308A (en) * | 2015-09-22 | 2015-11-25 | 东方电机控制设备有限公司 | Generator excitation device |
| CN109713959A (en) * | 2019-01-09 | 2019-05-03 | 中国长江电力股份有限公司 | A kind of generator excited system excitation blocking device and method |
-
2013
- 2013-05-29 CN CN2013203033864U patent/CN203289368U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105099308A (en) * | 2015-09-22 | 2015-11-25 | 东方电机控制设备有限公司 | Generator excitation device |
| CN105099308B (en) * | 2015-09-22 | 2018-06-29 | 东方电机控制设备有限公司 | A kind of generator excitation unit |
| CN109713959A (en) * | 2019-01-09 | 2019-05-03 | 中国长江电力股份有限公司 | A kind of generator excited system excitation blocking device and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131113 Termination date: 20160529 |