CN203396916U - Generator rotating rectifier detection device - Google Patents
Generator rotating rectifier detection device Download PDFInfo
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- CN203396916U CN203396916U CN201320401180.5U CN201320401180U CN203396916U CN 203396916 U CN203396916 U CN 203396916U CN 201320401180 U CN201320401180 U CN 201320401180U CN 203396916 U CN203396916 U CN 203396916U
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Abstract
The utility model discloses a generator rotating rectifier detection device which is applicable to a brushless excitation generator. The brushless excitation generator includes an excitation circuit for generating an excitation magnetic field, and a rotating rectifier which is arranged on a generator rotor so as to transform an excitation alternating current to a direct current. The detection device comprises a harmonic detection module and a harmonic analyzer; the harmonic detection module is arranged on the excitation circuit and is used for detection of harmonic signals generated by induction of the excitation circuit; and the harmonic analyzer is connected with the output terminal of the harmonic detection module and is used for to judge a fault state of the rotating rectifier based on the harmonic signals detected by the harmonic detection module. The detection device of the utility model uses the harmonic detection module to detect the harmonic signals in the excitation circuit, and uses the number of the harmonic component of the harmonic signals to determine whether the rotating rectifier has faults, so as to realize the online fault state detection of the rotating rectifier in the brushless excitation generator.
Description
Technical field
The utility model relates to brushless excitation generator field, especially, relates to a kind of generator rotating rectifier pick-up unit for brushless excitation generator.
Background technology
Traditional gas-turbine generator set adopts special-purpose DC exciter, and DC exciter and synchronous generator are two independent parts, but needs coaxial installation.The field copper of synchronous generator obtains direct supply by slip ring and the fixed brush being contained on turning axle from exciter, and this generator does not relate to rotating rectifier.
Gas-turbine generator set after improvement adopts brushless excitation generator, and in fact brushless excitation generator adopts two generators to form, and wherein, one as AC exciter, and another is as generator.The field copper of the armature winding of AC exciter, rotating rectifier and generator is all located on the rotor of generator and coaxial rotating, between them without any need for contacts such as slip ring and brushes.Due to rotating rectifier High Rotation Speed, commutation diode as the core component of rotating rectifier need to bear very large centrifugal action, and be operated under the workplace of high speed, high temperature and vibration, also can run into superpotential, excess current and other abnormal conditions, commutation diode may suffer damage, and failure rate is higher.Once and rotating rectifier breaks down and not process in time, will cause whole exciter to burn, generator cannot work.
Because the armature winding of rotating rectifier and AC exciter is installed on the rotor with generator; without directly electrically contacting, while whether having fault in order to detect rotating rectifier, traditional detection method needs to shut down with outside; from generator amature, pull down commutation diode and detect, waste time and energy.Therefore, need badly a kind of online pick-up unit for detection of faults in rotating rectifiers state is provided.
Utility model content
The utility model object is to provide a kind of generator rotating rectifier pick-up unit and detection method, the technical matters that cannot detect online to solve the existing rotating rectifier for brushless excitation generator.
For achieving the above object, the technical solution adopted in the utility model is as follows:
A rotating rectifier pick-up unit, is applicable to brushless excitation generator, and this brushless excitation generator comprises for generating the energized circuit of excitation field, and is located on generator amature for excitation AC being converted to galvanic rotating rectifier; This pick-up unit comprises Harmonic Detection module and harmonic analysis instrument;
Harmonic Detection module is located on energized circuit, the harmonic signal generating for detection of energized circuit induction;
Harmonic analysis instrument, is connected with the output terminal of Harmonic Detection module, judges the malfunction of rotating rectifier for the harmonic signal detecting according to Harmonic Detection module.
Further, Harmonic Detection module is Hall magnetic test coil, and Hall magnetic test coil is for detection of the induced potential in energized circuit, and induced potential is exported to harmonic analysis instrument.
Further, rotating rectifier is three-phase bridge rectifier circuit.
Further, the generator unit stator of brushless excitation generator is provided with the additional winding of generator unit stator, and the output terminal of the additional winding of generator unit stator is connected with the feeder ear of Harmonic Detection module.
Further, the output terminal of the additional winding of generator unit stator is connected with exciter excitation winding through field regulator, field regulator and exciter excitation winding excitation loop.
The utlity model has following beneficial effect:
The utility model generator rotating rectifier pick-up unit, by be provided with the Harmonic Detection module of the harmonic signal generating for detection of energized circuit induction on the energized circuit of AC exciter, the harmonic signal that Harmonic Detection module obtains detection is exported to harmonic analysis instrument, harmonic analysis instrument is judged the malfunction of rotating rectifier according to the number of times of harmonic component in described harmonic signal, thereby has realized the online detection of faults in rotating rectifiers state in brushless excitation generator.
Except object described above, feature and advantage, the utility model also has other object, feature and advantage.Below with reference to figure, the utility model is described in further detail.
Accompanying drawing explanation
The accompanying drawing that forms the application's a part is used to provide further understanding of the present utility model, and schematic description and description of the present utility model is used for explaining the utility model, does not form improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 is the structural representation of the utility model preferred embodiment brushless excitation generator rotating rectifier pick-up unit; And
Fig. 2 is the steps flow chart schematic diagram of the utility model preferred embodiment brushless excitation generator rotating rectifier detection method.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is elaborated, but the multitude of different ways that the utility model can be defined by the claims and cover is implemented.
Preferred embodiment of the present utility model provides a kind of generator rotating rectifier pick-up unit, is applicable to brushless excitation generator, and with reference to Fig. 1, this brushless excitation generator comprises AC exciter 10 and generator 20.AC exciter 10 is provided with energized circuit 11 and armature of exciter winding 12, and generator 20 comprises generator amature 21 and generator unit stator 22, and generator amature 21 is provided with generator amature winding 23, and generator unit stator 22 is provided with generator unit stator main winding 24.Wherein:
Energized circuit 11, for generating excitation field, rotates in excitation field for armature of exciter winding 12 and produces alternating current;
Armature of exciter winding 12, is located on generator amature 21 and through rotating rectifier 30 and connects generator amature winding 23; In the present embodiment, the three-phase bridge rectifier circuit of rotating rectifier 30 for being formed by commutation diode, the three-phase alternating current that armature of exciter winding 12 produces is converted to direct current and exports to generator amature winding 23 through rotating rectifier 30.Generator amature winding 23 generates excitation field as the field copper of generator 20, and the generator unit stator main winding 24 of being located on generator unit stator 22 generates three-phase alternating current output electric energy in the excitation field changing.
Because rotating rectifier 30 is three-phase bridge fully controlled rectifier structures, rotating rectifier 30 can produce harmonic component on the armature of exciter winding 12 of AC exciter 10, by spatial impression, answer, in the energized circuit 11 of AC exciter 10, also produce corresponding harmonic component.Because the armature of exciter winding 12 of AC exciter 10 is for Y shape connects, there is no center line, therefore do not exist 3 times and multiple subharmonic current.During normal operation, in armature supply, there is no direct current and even harmonics component.Therefore in three-phase full-bridge controlled rectifier, only contain 6K ± 1 subharmonic current, higher harmonic current produces fundamental magnetic potential and 6K ± 1 time higher hamonic wave magnetic potential together with fundamental current in armature of exciter winding 12.Because space harmonics magnetic potential is cut the exciter excitation winding 111 that it is arranged in energized circuit 11, produce induced potential.Positive sequence fundamental magnetic potential is not responded to generation electromotive force, and harmonic magnetic potential induction in 6K ± 1 generates stronger 6K subharmonic electromotive force.And 6K time induced potential reduces gradually along with K increases, and wherein, K is natural number.Therefore the fundamental magnetic potential that five times of mainly being produced by fundamental current of 6 overtones band electromotive forces, the seventh harmonic magnetic potential and five times, the seventh harmonic electric current produce is responded to and is produced.Therefore during rotating rectifier 30 normal operation, the induced potential signal that induction generates on energized circuit 11 is 6K rd harmonic signal.When in rotating rectifier 30, commutation diode breaks down, the structure of rectification circuit will change, therefore the main harmonic component in the armature of exciter winding 12 of AC exciter 10 will be no longer 6K ± 1 subharmonic, thereby the induced harmonics electromotive force that induction produces in energized circuit 11 can not take 6K again as main yet.Now by do not put the Harmonic Detection module 50 for detection of harmonic signal in energized circuit 11 on energized circuit 11, the output terminal of Harmonic Detection module 50 connects harmonic analysis instrument 60, and the harmonic component that harmonic analysis instrument 60 detects according to Harmonic Detection module 50 judges the malfunction of rotating rectifier 30.When maximum order harmonic components is 6K time, judge that rotating rectifier 30 is working properly; The harmonic component detecting is 1 or 2 time, illustrates that single branch trouble appears in rotating rectifier 30, thereby has realized the online detection of rotating rectifier 30 malfunctions in generator.
In the present embodiment, Harmonic Detection module 50 is Hall magnetic test coil, and Hall magnetic test coil detects the induced potential in energized circuit 11, and induced potential is exported to harmonic analysis instrument 60.Preferably, be also provided with the additional winding 25 of generator unit stator on generator unit stator 22, additional winding 25 output terminals of generator unit stator are connected with the feeder ear of Harmonic Detection module 50, thereby have saved the additional power source of Harmonic Detection module 50.Additional winding 25 output terminals of generator unit stator connect exciter excitation winding 111 through field regulator 40, and field regulator 40 and exciter excitation winding 111 form the energized circuit 11 of the present embodiment.Like this; utilize the collection of voltage signal of the outgoing side of 40 pairs of generator unit stators 22 of field regulator; the voltage that makes field regulator 40 follow generator 20 outgoing sides is adjusted the voltage on energized circuit 11; guaranteed the constant of generator 20 output voltages; thereby protect normal electricity consumption facility, avoided burning electrical equipment facility because of under-voltage or overvoltage.
The utility model embodiment also provides a kind of generator rotating rectifier detection method, for the fault detect of the rotating rectifier 30 on brushless excitation generator to use.With reference to Fig. 1; this brushless excitation generator comprises AC exciter 10 and generator 20; AC exciter 10 is provided with energized circuit 11 and armature of exciter winding 12; generator 20 comprises generator amature 21 and generator unit stator 22; generator amature 21 is provided with generator amature winding 23, and generator unit stator 22 is provided with generator unit stator main winding 24; Armature of exciter winding 12 is located on generator amature 21 and through rotating rectifier 30 and is connected generator amature winding 23.With reference to Fig. 2, this detection method comprises the following steps:
Step S10, detects the harmonic signal in energized circuit 11;
In the present embodiment, the harmonic signal that adopts Harmonic Detection module 50 to detect in energized circuit 11, preferably, Harmonic Detection module 50 is hall sensing coil, for detection of the induced potential in energized circuit 11.
Step S20, judges whether the harmonic component of harmonic signal is 6K time, and wherein, K is natural number;
In the present embodiment, harmonic analysis instrument receives the induced potential signal from Hall magnetic test coil, and whether analyze this induced potential signal be 6K time, and wherein, K is natural number.
Step S30, if judge rotating rectifier 30 normal operations;
Induced potential signal in energized circuit 11 is 6K time, and harmonic analysis instrument 60 is judged rotating rectifier 30 normal operations.
Step 540, judges that rotating rectifier 30 breaks down if not.
When the induced potential signal in energized circuit 11 is not 6K time, harmonic analysis instrument 60 judges that rotating rectifier 30 breaks down, and starts alerting signal and/or control genset shutdown work.
Generator rotating rectifier detection method in the utility model embodiment, by the harmonic signal that utilizes Harmonic Detection module 50 to detect in energized circuit 11, and utilize harmonic analysis instrument 60 to judge that the number of times of this harmonic signal harmonic component judges whether rotating rectifier 30 breaks down, thereby realized the online detection of rotating rectifier 30 malfunctions in generator, to ensure the normal operation of genset.
The foregoing is only preferred embodiment of the present utility model, be not limited to the utility model, for a person skilled in the art, the utility model can have various modifications and variations.All within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.
Claims (5)
1. a generator rotating rectifier pick-up unit; be applicable to brushless excitation generator; described brushless excitation generator comprises the energized circuit (11) for generating excitation field, and it is upper for excitation AC being converted to galvanic rotating rectifier (30) to be located at generator amature (21); It is characterized in that, this pick-up unit comprises Harmonic Detection module (50) and harmonic analysis instrument (60);
It is upper that described Harmonic Detection module (50) is located at described energized circuit (11), the harmonic signal generating for detection of described energized circuit (11) induction;
Described harmonic analysis instrument (60), is connected with the output terminal of described Harmonic Detection module (50), judges the malfunction of described rotating rectifier (30) for the harmonic signal detecting according to described Harmonic Detection module (50).
2. generator rotating rectifier pick-up unit according to claim 1, is characterized in that,
Described Harmonic Detection module (50) is Hall magnetic test coil, and described Hall magnetic test coil is for detection of the induced potential in described energized circuit (11), and described induced potential is exported to described harmonic analysis instrument (60).
3. generator rotating rectifier pick-up unit according to claim 1, is characterized in that,
Described rotating rectifier (30) is three-phase bridge rectifier circuit.
4. generator rotating rectifier pick-up unit according to claim 1, is characterized in that,
The generator unit stator of described brushless excitation generator (22) is provided with the additional winding (25) of generator unit stator, and the output terminal that described generator unit stator adds winding (25) is connected with the feeder ear of described Harmonic Detection module (50).
5. generator rotating rectifier pick-up unit according to claim 4, is characterized in that,
The output terminal that described generator unit stator adds winding (25) is connected with exciter excitation winding (111) through field regulator (40), and described field regulator (40) and described exciter excitation winding (111) form described energized circuit (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320401180.5U CN203396916U (en) | 2013-07-05 | 2013-07-05 | Generator rotating rectifier detection device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320401180.5U CN203396916U (en) | 2013-07-05 | 2013-07-05 | Generator rotating rectifier detection device |
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| CN203396916U true CN203396916U (en) | 2014-01-15 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103308857A (en) * | 2013-07-05 | 2013-09-18 | 株洲南方燃气轮机成套制造安装有限公司 | Power generator rotating rectifier detecting device and method |
| CN107957550A (en) * | 2016-10-17 | 2018-04-24 | 索恩格汽车德国有限责任公司 | The identification of failure in generator unit |
| CN108919123A (en) * | 2018-08-20 | 2018-11-30 | 中车永济电机有限公司 | A kind of brushless excitation generator measuring device and its measurement method |
| CN111308346A (en) * | 2020-04-08 | 2020-06-19 | 清华大学 | Method and system for detecting faults in stator field windings of polyphase brushless exciters |
| CN113311307A (en) * | 2021-05-28 | 2021-08-27 | 华北电力大学（保定） | Diode open-circuit fault detection method for three-phase brushless exciter rotating rectifier |
-
2013
- 2013-07-05 CN CN201320401180.5U patent/CN203396916U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103308857A (en) * | 2013-07-05 | 2013-09-18 | 株洲南方燃气轮机成套制造安装有限公司 | Power generator rotating rectifier detecting device and method |
| CN103308857B (en) * | 2013-07-05 | 2016-02-17 | 株洲中航动科南方燃气轮机成套制造安装有限公司 | Generator rotating rectifier pick-up unit and detection method |
| CN107957550A (en) * | 2016-10-17 | 2018-04-24 | 索恩格汽车德国有限责任公司 | The identification of failure in generator unit |
| CN107957550B (en) * | 2016-10-17 | 2021-04-09 | 索恩格汽车德国有限责任公司 | Identification of faults in a generator unit |
| CN108919123A (en) * | 2018-08-20 | 2018-11-30 | 中车永济电机有限公司 | A kind of brushless excitation generator measuring device and its measurement method |
| CN108919123B (en) * | 2018-08-20 | 2020-06-09 | 中车永济电机有限公司 | Brushless excitation generator measuring device and measuring method thereof |
| CN111308346A (en) * | 2020-04-08 | 2020-06-19 | 清华大学 | Method and system for detecting faults in stator field windings of polyphase brushless exciters |
| CN113311307A (en) * | 2021-05-28 | 2021-08-27 | 华北电力大学（保定） | Diode open-circuit fault detection method for three-phase brushless exciter rotating rectifier |
| CN113311307B (en) * | 2021-05-28 | 2023-04-07 | 华北电力大学（保定） | Diode open-circuit fault detection method for three-phase brushless exciter rotating rectifier |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140115 Termination date: 20180705 |