CN111835113A - Heavy gas turbine generator rotor coil structure suitable for variable frequency starting - Google Patents
Heavy gas turbine generator rotor coil structure suitable for variable frequency starting Download PDFInfo
- Publication number
- CN111835113A CN111835113A CN202010647370.XA CN202010647370A CN111835113A CN 111835113 A CN111835113 A CN 111835113A CN 202010647370 A CN202010647370 A CN 202010647370A CN 111835113 A CN111835113 A CN 111835113A
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- Prior art keywords
- gas turbine
- turbine generator
- variable frequency
- coil structure
- heavy
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- 238000004804 winding Methods 0.000 claims abstract description 46
- 238000013016 damping Methods 0.000 claims abstract description 42
- 230000005284 excitation Effects 0.000 claims abstract description 34
- 238000009413 insulation Methods 0.000 claims abstract description 25
- 239000010410 layer Substances 0.000 claims abstract description 24
- 239000004020 conductor Substances 0.000 claims description 8
- 238000007747 plating Methods 0.000 claims description 8
- 239000011248 coating agent Substances 0.000 claims description 7
- 238000000576 coating method Methods 0.000 claims description 7
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical group [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 6
- 229910052709 silver Inorganic materials 0.000 claims description 6
- 239000004332 silver Substances 0.000 claims description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 5
- 229920003235 aromatic polyamide Polymers 0.000 claims description 4
- 229910001316 Ag alloy Inorganic materials 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- YCKOAAUKSGOOJH-UHFFFAOYSA-N copper silver Chemical compound [Cu].[Ag].[Ag] YCKOAAUKSGOOJH-UHFFFAOYSA-N 0.000 claims description 3
- 241000555745 Sciuridae Species 0.000 claims description 2
- 239000000463 material Substances 0.000 claims description 2
- 239000011247 coating layer Substances 0.000 claims 3
- 230000001360 synchronised effect Effects 0.000 abstract description 10
- 238000001816 cooling Methods 0.000 abstract description 8
- 230000003068 static effect Effects 0.000 abstract description 6
- 239000012791 sliding layer Substances 0.000 abstract description 5
- 239000000446 fuel Substances 0.000 description 3
- 229920000784 Nomex Polymers 0.000 description 2
- 239000002826 coolant Substances 0.000 description 2
- 238000005034 decoration Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000004763 nomex Substances 0.000 description 2
- 231100000956 nontoxicity Toxicity 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/22—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors consisting of hollow conductors
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/24—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors with channels or ducts for cooling medium between the conductors
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/32—Windings characterised by the shape, form or construction of the insulation
- H02K3/34—Windings characterised by the shape, form or construction of the insulation between conductors or between conductor and core, e.g. slot insulation
- H02K3/345—Windings characterised by the shape, form or construction of the insulation between conductors or between conductor and core, e.g. slot insulation between conductor and core, e.g. slot insulation
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Windings For Motors And Generators (AREA)
Abstract
The invention discloses a heavy gas turbine generator rotor coil structure suitable for variable frequency starting, which comprises a hollow excitation winding, a squirrel-cage damping winding, a slot insulation layer, an inter-turn insulation layer and a slip layer, wherein the hollow excitation winding is arranged on the rotor coil structure; the squirrel-cage damping winding is arranged outside the hollow excitation winding; the hollow excitation winding and the rotor wire embedding groove are sealed in an insulating way through a groove; a sliding layer is arranged between the lowermost coil of the hollow excitation winding and the slot insulation; the heavy-duty gas turbine generator rotor coil structure is mainly suitable for a heavy-duty gas turbine generator started by adopting static variable frequency, meets the starting requirement of a synchronous motor under the working condition, can effectively improve the capacity of bearing unbalanced load of a unit under the working condition of the generator, and has good cooling performance and conductivity, high strength and safe and reliable high-speed operation.
Description
Technical Field
The invention relates to the technical field of large generators, in particular to a heavy gas turbine generator rotor coil structure suitable for variable frequency starting.
Background
At present, a heavy-duty gas turbine generator set is mainly started by a static variable frequency starting device (SFC), and when the heavy-duty gas turbine generator set is started, a generator is controlled by the SFC to serve as a synchronous motor, and the heavy-duty gas turbine generator set automatically exits after a shaft system of the gas turbine generator set is dragged to a self-sustaining rotating speed.
The rotor coil structure of the heavy gas turbine generator started by the SFC meets the excitation requirement of the generator, provides a stable and uniform excitation magnetic field for a unit in the operation process, meets the starting requirement under the working condition of a synchronous motor, can improve the negative sequence resistance of the unit under the working condition of the generator, and has good cooling wind path and mechanical performance.
For example, chinese patent CN2019204413374 discloses a novel rotor magnetic pole excitation winding structure, which includes a plurality of layers of excitation windings, wherein a single-layer excitation winding is composed of a plurality of excitation coils, the excitation coils are copper wire coils, the excitation coils are single-turn copper wire coils, and the excitation coils in the single-layer excitation winding are arranged in an equidistant staggered manner; the rotor coil structure is mainly suitable for a heavy gas turbine generator started by adopting static variable frequency, can not meet the starting requirement under the working condition of a synchronous motor, and can not effectively improve the capacity of bearing unbalanced load of a unit under the working condition of the generator.
Disclosure of Invention
The invention aims to solve the technical problems that the prior art can not meet the starting requirement of a synchronous motor under the working condition and can not effectively improve the capacity of a unit bearing unbalanced load under the working condition of a generator, and provides a heavy gas turbine generator rotor coil structure suitable for variable frequency starting.
The technical scheme adopted by the invention for solving the technical problems is as follows: a heavy gas turbine generator rotor coil structure suitable for variable frequency starting comprises a hollow excitation winding, a squirrel-cage damping winding, a slot insulation layer, an inter-turn insulation layer and a slip layer; the squirrel-cage damping winding is arranged outside the hollow excitation winding; the hollow excitation winding and the rotor wire embedding groove are sealed in an insulating way through a groove; a sliding layer is arranged between the lowermost coil of the hollow excitation winding and the slot insulation; the heavy-duty gas turbine generator rotor coil structure is mainly suitable for a heavy-duty gas turbine generator started by adopting static variable frequency, meets the starting requirement of a synchronous motor under the working condition, can effectively improve the capacity of bearing unbalanced load of a unit under the working condition of the generator, and has good cooling performance and conductivity, high strength and safe and reliable high-speed operation.
As a further improvement of the above technical solution, the hollow type excitation winding is provided with a plurality of layers of inter-turns, and inter-turn insulation is provided between two adjacent layers of inter-turns.
As a further improvement of the above technical scheme, the hollow excitation winding is a hollow conductor, the hollow conductor is made of copper and internally contains a first plating layer, and the first plating layer is a silver plating layer; the cooling medium flows in the hollow conductor, and the cooling effect is improved.
As a further improvement of the above technical solution, the squirrel-cage damping winding includes an end damping coil and a body damping coil, and the end damping coil is connected with the body damping coil; the end damping coil and the body damping coil are both made of copper-silver alloy, and have high conductivity; and a second coating is arranged on the contact surface of the end damping coil and the body damping coil, and the second coating is a silver coating.
As a further improvement of the technical scheme, the material of the slot insulation and the interturn insulation is meta-position polyaramid (Nomex), and the meta-position polyaramid has high temperature resistance, no toxicity and better electrical and mechanical properties.
Compared with the prior art, the invention has the beneficial effects that: the heavy-duty gas turbine generator rotor coil structure is mainly suitable for a heavy-duty gas turbine generator started by adopting static variable frequency, meets the starting requirement of a synchronous motor under the working condition, can effectively improve the capacity of bearing unbalanced load of a unit under the working condition of the generator, and has good cooling performance and conductivity, high strength and safe and reliable high-speed operation.
The squirrel-cage damping winding has simple and reliable structure and provides starting torque for the rotor under the working condition of the synchronous motor; the squirrel-cage damping winding provides a low-resistance path for negative-sequence current, and the capacity of bearing unbalanced load under the working condition of the generator is improved.
Drawings
FIG. 1 is a schematic view of a variable frequency start heavy duty gas turbine generator rotor winding configuration of the present invention;
FIG. 2 is a schematic view of an in-slot portion of a rotor of the present invention;
fig. 3 is a schematic diagram of the squirrel-cage damping winding of the present invention.
In the drawings: 1. the structure comprises an air-core excitation winding, 2 ends of damping coils, 3 bodies of damping coils, 4 grooves of insulation, 5 turns of insulation and 6 sliding layers.
Detailed Description
The present invention will be described in further detail with reference to specific examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1-3, a heavy duty gas turbine generator rotor coil structure suitable for variable frequency starting comprises an air-core excitation winding 1, a squirrel cage type damping winding, a slot insulation 4, an inter-turn insulation 5 and a slip layer 6; the hollow type excitation winding 1 is provided with a plurality of layers of turn-to-turn, and turn-to-turn insulation 5 is arranged between two adjacent layers of turn-to-turn; the squirrel-cage damping winding is arranged outside the hollow excitation winding 1; the hollow excitation winding 1 and the rotor embedding slot are sealed through slot insulation 4; a sliding layer 6 is arranged between the lowermost coil of the hollow excitation winding 1 and the slot insulation 4; the heavy-duty gas turbine generator rotor coil structure is mainly suitable for a heavy-duty gas turbine generator started by adopting static variable frequency, meets the starting requirement of a synchronous motor under the working condition, can effectively improve the capacity of bearing unbalanced load of a unit under the working condition of the generator, and has good cooling performance and conductivity, high strength and safe and reliable high-speed operation.
In the above embodiment, the hollow excitation winding 1 is a hollow conductor, the hollow conductor is made of copper and contains a first plating layer therein, and the first plating layer is a silver plating layer; when the cooling device is used, the cooling medium flows in the hollow conductor, so that the cooling effect is improved.
The squirrel-cage damping winding comprises an end damping coil 2 and a body damping coil 3, and the end damping coil 2 is connected with the body damping coil 3; the end damping coil 2 and the body damping coil 3 are both made of copper-silver alloy, and have high conductivity; and a second coating is arranged on the contact surface of the end damping coil 2 and the body damping coil 3, and the second coating is a silver coating.
The squirrel-cage damping winding has simple and reliable structure and provides starting torque for the rotor under the working condition of the synchronous motor; the squirrel-cage damping winding provides a low-resistance path for negative-sequence current, and the capacity of bearing unbalanced load under the working condition of the generator is improved.
The slot insulation 4 and the inter-turn insulation 5 are made of meta-polyaramid (Nomex) which has high temperature resistance, no toxicity and better electrical and mechanical properties.
Because the sliding layer 6 is arranged between the lowermost coil of the hollow excitation winding 1 and the slot insulation 4, the friction coefficient is lower, and the requirement of axial expansion sliding in the working process of the rotor coil is further met.
Finally, a top section bar frame and a bottom section bar frame of a fuel cell system frame structure of the fuel cell system are connected with a pile module frame through bolts to form a structural system of the whole system; when the fuel cell system is fixed with the whole vehicle, the hole position is arranged on the bottom frame, and the bottom frame is connected with the whole vehicle fixing structure after being transited through the shock pad.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; the two components can be directly connected or indirectly connected through an intermediate medium, and the two components can be communicated with each other. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A heavy gas turbine generator rotor coil structure suitable for variable frequency starting is characterized by comprising an air-core excitation winding (1), a squirrel-cage damping winding, a slot insulation (4) and a slip layer (6); the squirrel-cage damping winding is arranged outside the hollow excitation winding (1); the hollow excitation winding (1) and the rotor embedding slot are sealed through the slot insulation (4); and the slip layer (6) is arranged between the lowermost coil of the hollow excitation winding (1) and the slot insulation (4).
2. A heavy gas turbine generator rotor coil structure suitable for variable frequency starting according to claim 1, characterized in that the air-core type excitation winding (1) is provided with a plurality of layers of inter-turns, and inter-turn insulation (5) is provided between two adjacent layers of inter-turns.
3. A heavy duty gas turbine generator rotor coil structure adapted for variable frequency starting according to claim 2, wherein said air-core type field winding (1) is a hollow conductor.
4. The rotor coil structure of a heavy duty gas turbine generator suitable for variable frequency starting according to claim 3, wherein the hollow conductor is made of copper and contains a first coating layer therein.
5. The heavy-duty gas turbine generator rotor coil structure suitable for variable frequency starting according to claim 4, wherein the first plating layer is a silver plating layer.
6. A heavy duty gas turbine generator rotor coil structure suitable for variable frequency starting according to claim 1, wherein said squirrel cage damping winding comprises an end damping coil (2) and a body damping coil (3), said end damping coil (2) being connected with the body damping coil (3).
7. A heavy gas turbine generator rotor coil structure suitable for variable frequency starting according to claim 6, characterized in that the end damping coils (2) and the body damping coils (3) are made of copper-silver alloy.
8. A heavy gas turbine generator rotor coil structure suitable for variable frequency starting according to claim 6, characterized in that the contact surfaces of the end damping coils (2) and the body damping coils (3) are provided with a second coating.
9. The heavy-duty gas turbine generator rotor coil structure suitable for variable frequency starting according to claim 8, wherein said second coating layer is a silver coating layer.
10. A heavy duty gas turbine generator rotor coil structure suitable for variable frequency starting according to claim 2, characterized in that the material of the slot insulation (4) and the inter-turn insulation (5) is meta-polyaramid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010647370.XA CN111835113A (en) | 2020-07-07 | 2020-07-07 | Heavy gas turbine generator rotor coil structure suitable for variable frequency starting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010647370.XA CN111835113A (en) | 2020-07-07 | 2020-07-07 | Heavy gas turbine generator rotor coil structure suitable for variable frequency starting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111835113A true CN111835113A (en) | 2020-10-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010647370.XA Pending CN111835113A (en) | 2020-07-07 | 2020-07-07 | Heavy gas turbine generator rotor coil structure suitable for variable frequency starting |
Country Status (1)
| Country | Link |
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| CN (1) | CN111835113A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4337628A1 (en) * | 1993-11-04 | 1995-05-11 | Abb Management Ag | Rotor of a turbogenerator with direct gas cooling of the field winding |
| JP3096980B1 (en) * | 1999-10-20 | 2000-10-10 | 西芝電機株式会社 | Salient pole type rotor |
| EP1361642A1 (en) * | 2002-05-10 | 2003-11-12 | ALSTOM (Switzerland) Ltd | Rotor of a turbogenerator |
| CN202197198U (en) * | 2011-09-19 | 2012-04-18 | 山东齐鲁电机制造有限公司 | Novel start-up damping structure of synchronous motor |
| CN202435167U (en) * | 2012-01-18 | 2012-09-12 | 广州广重企业集团有限公司 | Damping winding structure of steam turbine generator |
| CN203481959U (en) * | 2013-07-12 | 2014-03-12 | 哈尔滨电机厂有限责任公司 | Rotor slot internal insulation structure of 1250 MW nuclear-power half-speed turbonator |
| CN106416017A (en) * | 2014-04-10 | 2017-02-15 | 通用电器技术有限公司 | C-shaped or u-shaped half-coil, rotor winding with such a half-coil and its manufacturing method |
| CN207234636U (en) * | 2017-09-26 | 2018-04-13 | 上海马拉松·革新电气有限公司 | A kind of Damper Winding of salient pole type single-phase generator |
-
2020
- 2020-07-07 CN CN202010647370.XA patent/CN111835113A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4337628A1 (en) * | 1993-11-04 | 1995-05-11 | Abb Management Ag | Rotor of a turbogenerator with direct gas cooling of the field winding |
| JP3096980B1 (en) * | 1999-10-20 | 2000-10-10 | 西芝電機株式会社 | Salient pole type rotor |
| EP1361642A1 (en) * | 2002-05-10 | 2003-11-12 | ALSTOM (Switzerland) Ltd | Rotor of a turbogenerator |
| CN202197198U (en) * | 2011-09-19 | 2012-04-18 | 山东齐鲁电机制造有限公司 | Novel start-up damping structure of synchronous motor |
| CN202435167U (en) * | 2012-01-18 | 2012-09-12 | 广州广重企业集团有限公司 | Damping winding structure of steam turbine generator |
| CN203481959U (en) * | 2013-07-12 | 2014-03-12 | 哈尔滨电机厂有限责任公司 | Rotor slot internal insulation structure of 1250 MW nuclear-power half-speed turbonator |
| CN106416017A (en) * | 2014-04-10 | 2017-02-15 | 通用电器技术有限公司 | C-shaped or u-shaped half-coil, rotor winding with such a half-coil and its manufacturing method |
| CN207234636U (en) * | 2017-09-26 | 2018-04-13 | 上海马拉松·革新电气有限公司 | A kind of Damper Winding of salient pole type single-phase generator |
Non-Patent Citations (1)
| Title |
|---|
| 张华伟等: "66MW空内冷汽轮发电机的研制", 《防爆电机》 * |
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| PB01 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20201215 Address after: 250012 Qilu motor building, No.18 Huaxin Road, Lixia District, Jinan City, Shandong Province Applicant after: SHANDONG QILU ELECTRIC MOTOR MANUFACTURING Co.,Ltd. Address before: 250012 Qilu motor building, No.18 Huaxin Road, Lixia District, Jinan City, Shandong Province Applicant before: SHANDONG QILU ELECTRIC MOTOR MANUFACTURING Co.,Ltd. Applicant before: SHANDONG JINAN POWER EQUIPMENT FACTORY Co.,Ltd. |
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Application publication date: 20201027 |
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| RJ01 | Rejection of invention patent application after publication |