CN206470357U - Wind power generating set and its cable fault detecting device - Google Patents
Wind power generating set and its cable fault detecting device Download PDFInfo
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- CN206470357U CN206470357U CN201720176011.4U CN201720176011U CN206470357U CN 206470357 U CN206470357 U CN 206470357U CN 201720176011 U CN201720176011 U CN 201720176011U CN 206470357 U CN206470357 U CN 206470357U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
- Y04S10/52—Outage or fault management, e.g. fault detection or location
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Abstract
The utility model provides a kind of wind power generating set and its cable fault detecting device.In cable fault detecting device, wind power generating set includes stator winding, each phase in A phases, B phases and the C phases of stator winding is connected at least two cables being connected in parallel, the cable clamping of the A phases of the same winding of every three connections, B phases and C phases is a bundle, cable fault detecting device includes PLC and multiple first current transformers, wherein, at least partly the first current transformer is arranged on different bundles and out of phase cable, and the first current transformer is communicated to connect with PLC respectively.Cable fault detecting device of the present utility model can be quick, accurately detects cable fault, and then cable fault can be excluded into the stage in the early stage, it is ensured that the reliability service of wind power generating set.
Description
Technical Field
The utility model relates to a power transmission field especially relates to a wind generating set and cable fault detection device thereof.
Background
At present, the capacity of the whole wind generating set is increasingly large, the maximum capacity set reaches 8 megawatts, and the height of a tower is close to 200 meters. For the wind generating set with the oversize size, the length of the cable connection from the generator to the converter is far longer than that of a common wind generating set, and the traditional process of adopting the whole cable for wire protection is not suitable for the wind generating set with the high tower and the large capacity.
In order to meet the power transmission requirement of a high-tower and large-capacity wind generating set, two butt-joint or multi-section cable section butt-joint technology is adopted for the adopted cable. Specifically, as shown in fig. 1, the vertical section of the cable 1 is clamped on the inner wall of the tower 3 by a cable clamp 2, and the butt-jointed portions of the cable are connected by a connecting pipe 4, preferably a cold-pressed copper connecting pipe.
The cable 1 connected by the connecting tube 4 has the following disadvantages: the quality of the connecting pipe used at the butt joint position is unqualified, the constructor is paralyzed carelessly, the technical experience is insufficient or the construction appliance is failed, the conductivity of the connecting position of the cable 1 is unqualified, the heating value of the middle joint of the cable is large, the temperature is high, the insulation of the connecting pipe 4 and the cables at the two ends of the connecting pipe 4 is damaged, and even the connecting pipe 4 is burnt out or the cables at the joint are burnt out.
Further, in order to ensure sufficient current-carrying capacity, the cables of the wind turbine generator system are usually arranged by connecting a plurality of cables in phase with the winding in parallel. In order to reduce the eddy current effect, three cables of A, B, C three phases of the same winding are usually clamped into one bundle by a cable clamp, and two or more bundles of cables are usually connected in parallel to the same winding. If the butt joint position of one cable in one bundle fuses due to overcurrent and overtemperature, and other bundles of parallel cables are still normally connected, the unit cannot be in fault shutdown and still normally operates, but the current of other bundles of cables with the same phase as the winding can be increased.
Lack among the prior art and can effectively carry out fault detection's means to the cable of generator to converter cabinet interlude, can't carry out quality inspection and acceptance after the cable passes through the connecting pipe and connects, and also can not shut down when cable butt joint department breaks down, and then the insulating layer that can accelerate other cables is ageing, lead to the fusing of other cables or burn out other electrical apparatus of unit inside, and then influence wind generating set's normal operating, influence operating personnel's personal safety even.
SUMMERY OF THE UTILITY MODEL
An embodiment of the utility model provides a cable fault detection device to solve and carry out effectual fault detection's problem to wind generating set's many cables.
In order to achieve the above object, the embodiments of the present invention adopt the following technical solutions:
an embodiment of the utility model provides a wind generating set's cable fault detection device on the one hand, wind generating set includes stator winding, stator winding's A looks, each looks in B looks and the C looks is connected with two piece at least parallel connection's cable respectively, every three A looks of connecting same winding, the cable centre gripping in B looks and C looks is a bundle, cable fault detection device includes PLC controller and a plurality of first current transformer, wherein, at least partial first current transformer sets up on the cable of different bundles and different looks, first current transformer respectively with PLC controller communication connection.
Optionally, the stator winding is a group, and each of the phases a, B and C of the stator winding is connected with two cables connected in parallel; the cable is divided into two bundles; the number of the first current transformers is three, wherein two first current transformers are arranged on any two-phase cables in the A phase, the B phase and the C phase in one cable bundle, and the other first current transformer is arranged on a third-phase cable in the A phase, the B phase and the C phase in the other cable bundle.
Optionally, the stator winding is a group, and each of the phases a, B and C of the stator winding is connected with three cables connected in parallel; the cable is divided into three bundles; the number of the first current transformers is three, wherein the three first current transformers are respectively arranged on different bundles of cables with different phases.
Optionally, the stator windings are divided into two groups, and each of the phases a, B and C of the stator windings is connected with two cables connected in parallel; the cable is divided into two bundles; the number of the first current transformers is six, and every three first current transformers detect cables of a group of stator windings; wherein, for one stator winding, two first current transformers are arranged on any two-phase cables in the A phase, the B phase and the C phase in one bundle of cables, and the other first current transformer is arranged on a third-phase cable in the A phase, the B phase and the C phase in the other bundle of cables.
Optionally, the stator windings are divided into two groups, and each of the phases a, B and C of the stator windings is connected with three cables connected in parallel; the number of the first current transformers is six, and every three first current transformers detect cables of a group of stator windings; wherein, for one stator winding, three first current transformers are respectively arranged on different bundles of cables with different phases.
Optionally, the system further comprises a first analog-to-digital conversion circuit in communication connection with the PLC controller, and the first current transformers are respectively connected with the first analog-to-digital conversion circuit.
Optionally, the wind generating set further comprises a second current transformer, the second current transformer is arranged on a ground wire of a tower of the wind generating set, and the second current transformer is in communication connection with the PLC controller.
Optionally, the second current transformer is connected with the second analog-to-digital conversion circuit.
Optionally, the tower is grounded through a plurality of grounding wires, and the second current transformer is arranged on the grounding wire with the shortest distance from the main control cabinet of the wind generating set.
The embodiment of the utility model provides an on the other hand provides a wind generating set, has aforementioned cable fault detection device.
The embodiment of the utility model provides a cable fault detection device, through at least part of first current transformer sets up on the cable of different bundles and different phases, and with first current transformer respectively with PLC controller communication connection, on the basis that need not every cable all to set up current transformer, can accurate detection and judgement whether there is the cable to break down, and report and the processing of trouble, can improve wind generating set's reliability and security by a wide margin, can carry out timely detection and processing to cable fault, reduce the influence of cable fault to wind generating set operation, eliminate the trouble at the initial stage, ensured wind generating set's operation safety; meanwhile, the number of the current transformers is reduced, the cost is reduced, and the data processing capacity of the PLC is reduced.
Further, the embodiment of the utility model provides a cable fault detection device can also detect and the fault report to the ground electric current of complete machine, and the power cable overlap joint that has the fusing is on a tower section of thick bamboo, in time reports to the police, guarantees unit tower section of thick bamboo lower part staff's personal safety.
The embodiment of the utility model provides a wind generating set can realize the detection and the trouble report of cable fault with lower cost, has higher reliability and security.
Further, the embodiment of the utility model provides a wind generating set can also detect and the fault report ground current of unit, has also promoted wind generating set's security.
Drawings
FIG. 1 is a schematic configuration diagram of the arrangement of a cable in a tower of a wind generating set according to the first embodiment;
FIG. 2 is a schematic diagram of a cable fault detection apparatus according to a first embodiment arranged on a cable when a wind turbine generator employs a set of windings;
FIG. 3 is a schematic diagram of a cable fault detection apparatus according to a second embodiment arranged on a cable when a wind turbine generator employs a set of windings;
FIG. 4 is a diagram illustrating a cable fault detection apparatus according to a third embodiment arranged on a cable when a wind turbine generator employs two sets of windings;
fig. 5 is a diagram illustrating a cable fault detection apparatus according to a fourth embodiment arranged on a cable when a wind turbine generator employs two sets of windings;
fig. 6 is a schematic circuit connection diagram of the cable fault detection apparatus of the present embodiment;
fig. 7 is a schematic circuit connection diagram of another embodiment of the cable fault detection apparatus of the present embodiment.
The reference numbers illustrate:
1. a cable; 2. a cable clamp; 3. a tower drum; 4. a connecting pipe; 11. a first cable; 12. a second cable; 13. a third cable; 14. a fourth cable; 15. a fifth cable; 16. a sixth cable; 17. a seventh cable; 18. an eighth cable; 19. a ninth cable; 21. a tenth cable; 22. an eleventh cable; 23. a twelfth cable; 24. a thirteenth cable; 25. a fourteenth cable; 26. a fifteenth cable; 27. a sixteenth cable; 28. a seventeenth cable; 29. an eighteenth cable; 211. a first clamp; 212. a second clamp; 213. a third clamp; 221. a fourth clamp; 222. a fifth clamp; 223. a sixth jig; 51. a first current transformer; 52. a second current transformer; 61. a first analog-to-digital conversion circuit; 62. a second analog-to-digital conversion circuit; 7. a PLC controller; 100. a cable connected to the first stator winding; 200. and a cable connected to the second stator winding.
Detailed Description
The following describes the wind generating set and the cable fault detection device thereof in detail in accordance with the embodiments of the present invention with reference to the accompanying drawings. In fig. 2 to 5, the cable on which the first current transformer 51 is mounted is hatched for distinction.
The embodiment relates to a cable fault detection device of a wind generating set, and the wind generating set comprises a stator winding. Each phase of A phase, B phase and C phase of the stator winding is respectively connected with at least two cables connected in parallel, and every three cables connected with the A phase, the B phase and the C phase of the same winding are clamped into a bundle. The cable fault detection device of the present embodiment includes a PLC controller 7 and a plurality of first current transformers 51, where at least some of the first current transformers 51 are disposed on cables in different bundles and different phases, and the first current transformers 51 are respectively in communication connection with the PLC controller 7.
Specifically, the first current transformer 51 detects the operating currents of the cables in different phases, and transmits the operating current values I of the cables in different phases to the PLC controller 7, and the PLC controller 7 determines whether a cable has a fault according to the detected operating current values, and if it is determined that a cable fault has occurred, may perform a fault report in time to perform fault processing. The principle of fault judgment is mainly that when one cable of a plurality of parallel cables connected with the same phase of the stator winding has a fault at a butt joint, such as disconnection, the running current of the other cables connected with the cable in parallel is abnormally increased, and then the fault of the cable of the phase where the cable is located can be judged by detecting the abnormal change of the running current of the cable.
Alternatively, one way to determine whether a cable has failed is to detect the operating current I of cables of different phases and compare the operating current values I of cables of different phases with each other. If the ratio of the deviation of the running current value I of a certain cable and the running current values I of other cables exceeds a preset range, the connected cable can be judged to have a fault; if the deviation of the running current values I of all the cables is within the preset range, the cables can be judged to be free of faults. The predetermined range may be set according to actual conditions, and may be set to be, for example, between 8% and 15%, and preferably 10%.
For example, if the operating current value I of a two-phase cable is 300A and the operating current value I of another phase cable is 360A in a three-phase cable, and the ratio of the deviation is (360- & ltSUB- & gt 300)/300 & ltSUB & gt 20%, it is determined that the connecting cable of the phase with the operating current value I of 360A has a fault.
Optionally, another way of judging whether the cable has a fault is that the PLC controller 7 calculates a current value corresponding to a single cable according to the current operating power of the wind turbine generator system to obtain a reference value IDatumThen, the operating current value I of the cables of different phases detected by the first current transformer 51 is compared with the reference value IDatumComparing the running current value I of a certain phase cable with the reference value IDatumIf the ratio of the deviation exceeds a predetermined range, it can be determined that the connected cable has a fault; if the deviation of the running current values I of all the cables is within the preset range, the cables can be judged to be free of faults. The predetermined range may be set according to actual conditions.
For example, it may be set to 8% to 15%, preferably 10%. For example, if the reference value I is calculated from the operating powerDatum300A, the operation current value I of the cable of a certain phase is 360A, and the deviation ratio is (360-300)/300-20%, at this time, it is determined that the connection cable of the phase where the operation current value I is 360A has a fault.
Optionally, the cable fault may also be determined by a combination of the two determination manners, that is, when at least one of the two determination manners determines that the cable is faulty, the cable is considered to be faulty. The detailed description is not repeated.
In addition, in this embodiment, the first current transformers 51 are disposed on cables of different bundles, and the first current transformers 51 are not disposed on cables of the same bundle, which is mainly caused by the fact that the first current transformers 51 are sleeved on the periphery of the cables, and the outer diameter of the cable bundle is increased by disposing the first current transformers 51 on the same bundle of cables, which is not beneficial to clamping the cables.
In addition, the first current transformers 51 are arranged on the cables which are bundled differently and are not in the same phase, the influence on the diameter of the cable bundle can be reduced, meanwhile, the detection on each phase of cable is realized, the first current transformers 51 do not need to be arranged on each cable, the arrangement number of the first current transformers 51 is reduced, and the cost is reduced.
Optionally, all of the first current transformers 51 are arranged on different bundles and different phases of cables.
The embodiment of the utility model provides a cable fault detection device, through setting up at least part of first current transformer 51 on the cable of different bundles and different phases, and with first current transformer 51 respectively with PLC controller 7 communication connection, on the basis that need not every cable and all set up first current transformer 51, can accurate detection and judgement whether there is the cable to break down, and the report and the processing of trouble go on, can improve wind generating set's reliability and security by a wide margin, can carry out timely detection and processing to the cable fault, reduce the influence of cable fault to wind generating set operation; meanwhile, the number of the first current transformers 51 is reduced, the cost is reduced, and the data processing capacity of the PLC 7 is reduced.
Specifically, fig. 2 shows a first embodiment of the cable fault detection apparatus of the present embodiment, in which a stator winding is a set, and two cables connected in parallel are respectively connected to each of the phases a, B, and C of the stator winding; the cable is divided into two bundles; the number of the first current transformers 51 is three, wherein two first current transformers 51 are provided on any two of the cables of the a phase, the B phase, and the C phase in one bundle of cables, and another first current transformer 51 is provided on a third one of the cables of the a phase, the B phase, and the C phase in another bundle of cables.
Specifically, as shown in fig. 2, the cables 100 connected to the first stator winding have 6 cables in total, wherein the first cable 11 is connected in parallel to the fourth cable 14 and connected to the a-phase of the stator winding, respectively, the second cable 12 is connected in parallel to the fifth cable 15 and connected to the B-phase of the stator winding, respectively, and the third cable 13 is connected in parallel to the sixth cable 16 and connected to the C-phase of the stator winding, respectively. The first cable 11, the second cable 12 and the third cable 13 are clamped into a first bundle by a first clamp 211; fourth cable 14, fifth cable 15, and sixth cable 16 are held in a second bundle by second clamp 212.
Two first current transformers 51 are arranged on the first bundle of first cables 11 and the second cable 12, respectively, and another first current transformer 51 is arranged on the second bundle of sixth cables 16. However, the arrangement of the first current transformer 51 is not limited thereto.
With this arrangement, the cable fault detection apparatus of the present embodiment can perform fault detection on cables of the a-phase, the B-phase, and the C-phase, respectively, and the three first current transformers 51 are arranged on two bundles of cables, respectively, thereby avoiding an excessive influence on the diameter of one bundle of cables. Meanwhile, the three first current transformers 51 are adopted to realize the fault detection of the two bundles of cables.
As a modification, fig. 3 shows a second embodiment of the cable fault detection apparatus of the present embodiment, in which a stator winding is a set, and three cables connected in parallel are connected to each of the phases a, B, and C of the stator winding; the cable is divided into three bundles; the number of the first current transformers 51 is three, wherein the three first current transformers 51 are respectively arranged on different bundles of cables of different phases.
Specifically, as shown in fig. 3, the cables 100 connected to the first stator winding have 9 in total, in which the first cable 11, the fourth cable 14, and the seventh cable 17 are connected in parallel and connected to the a-phase of the stator winding, respectively, the second cable 12, the fifth cable 15, and the eighth cable 18 are connected in parallel and connected to the B-phase of the stator winding, respectively, and the third cable 13, the sixth cable 16, and the ninth cable 19 are connected in parallel and connected to the C-phase of the stator winding, respectively. The first cable 11, the second cable 12 and the third cable 13 are clamped into a first bundle by a first clamp 211; fourth cable 14, fifth cable 15, and sixth cable 16 are held in a second bundle by second clamp 212; seventh cable 17, eighth cable 18, and ninth cable 19 are held in a third bundle by third clamp 213.
Three first current transformers 51 are arranged on the first bundle of first cables 11, the second bundle of fifth cables 15, and the third bundle of ninth cables 19, respectively. However, the arrangement of the current transformer is not limited to this.
With this arrangement, the cable fault detection apparatus of the present embodiment can perform fault detection on cables of the a-phase, the B-phase, and the C-phase, respectively, and the three first current transformers 51 are arranged on three bundles of cables, respectively, avoiding an excessive influence on the diameter of one bundle of cables. Meanwhile, the three first current transformers 51 are adopted to realize the fault detection of the three bundles of cables.
Embodiments one and two show different embodiments of the cable fault detection apparatus for a set of stator windings, but the present embodiment is not limited to the above two embodiments.
As an extension, fig. 4 shows a third embodiment of the cable fault detection device when the wind turbine generator system is provided with two sets of stator windings.
Specifically, the stator windings are divided into two groups, and each phase of the A phase, the B phase and the C phase of the stator windings is respectively connected with two cables connected in parallel; the cable is divided into two bundles; six first current transformers 51 are provided, and every three first current transformers 51 detect cables of a group of stator windings; wherein, for one stator winding, two first current transformers 51 are arranged on the cables of any two phases of the A phase, the B phase and the C phase in one bundle of cables, and the other first current transformer 51 is arranged on the cable of the third phase of the A phase, the B phase and the C phase in the other bundle of cables.
Specifically, as shown in fig. 4, there are 6 cables 100 connected to the first stator winding, wherein the first cable 11 is connected in parallel to the fourth cable 14 and connected to the a-phase of the first stator winding, respectively, the second cable 12 is connected in parallel to the fifth cable 15 and connected to the B-phase of the first stator winding, respectively, and the third cable 13 is connected in parallel to the sixth cable 16 and connected to the C-phase of the first stator winding, respectively. The first cable 11, the second cable 12 and the third cable 13 are clamped into a first bundle by a first clamp 211; fourth cable 14, fifth cable 15, and sixth cable 16 are held in a second bundle by second clamp 212.
Two first current transformers 51 are arranged on the first bundle of first cables 11 and the second cable 12, respectively, and another first current transformer 51 is arranged on the second bundle of sixth cables 16.
The total number of the cables 200 connected to the second stator winding is 6, wherein a tenth cable 21 is connected in parallel to a thirteenth cable 24 and is connected to the phase a of the second stator winding, respectively, an eleventh cable 22 is connected in parallel to a fourteenth cable 25 and is connected to the phase B of the second stator winding, respectively, and a twelfth cable 23 is connected in parallel to a fifteenth cable 26 and is connected to the phase C of the second stator winding, respectively. Wherein, the tenth cable 21, the eleventh cable 22 and the twelfth cable 23 are clamped into a third bundle by a fourth clamp 221; the thirteenth cable 24, the fourteenth cable 25, and the fifteenth cable 26 are held in a fourth bundle by a fifth holder 222.
Two first current transformers 51 are arranged on the tenth cable 21 and the eleventh cable 22 of the third bundle, respectively, and another first current transformer 51 is arranged on the fifteenth cable 26 of the fourth bundle. However, the arrangement of the current transformer is not limited to this.
As an extension, fig. 5 shows a third embodiment of the cable fault detection device when the wind turbine generator system is provided with two sets of stator windings.
The number of cables 100 connected to the first stator winding is 9 in total, wherein a first cable 11, a fourth cable 14 and a seventh cable 17 are connected in parallel and connected to phase a of the first stator winding, respectively, a second cable 12, a fifth cable 15 and an eighth cable 18 are connected in parallel and connected to phase B of the first stator winding, respectively, and a third cable 13, a sixth cable 16 and a ninth cable 19 are connected in parallel and connected to phase C of the first stator winding, respectively. The first cable 11, the second cable 12 and the third cable 13 are clamped into a first bundle by a first clamp 211; fourth cable 14, fifth cable 15, and sixth cable 16 are held in a second bundle by second clamp 212; seventh cable 17, eighth cable 18, and ninth cable 19 are held in a third bundle by third clamp 213.
Three first current transformers 51 are arranged on the first bundle of first cables 11, the second bundle of fifth cables 15, and the third bundle of ninth cables 19, respectively. The arrangement of the first current transformer 51 on the cable 100 connected to the first stator winding is not limited thereto.
The total number of the cables 200 connected to the second stator winding is 9, wherein a tenth cable 21, a thirteenth cable 24 and a sixteenth cable 27 are connected in parallel and are respectively connected to the a phase of the second stator winding, an eleventh cable 22, a fourteenth cable 25 and a seventeenth cable 28 are connected in parallel and are respectively connected to the B phase of the second stator winding, and a twelfth cable 23, a fifteenth cable 26 and an eighteenth cable 29 are connected in parallel and are respectively connected to the C phase of the second stator winding. Wherein, the tenth cable 21, the eleventh cable 22 and the twelfth cable 23 are clamped into a fourth bundle by a fourth clamp 221; the thirteenth cable 24, the fourteenth cable 25, and the fifteenth cable 26 are held in a fifth bundle by a fifth holder 222; the sixteenth cable 27, the seventeenth cable 28 and the eighteenth cable 29 are held in a sixth bundle by a sixth jig 223.
Three first current transformers 51 are provided on the fourth bundle of tenth cables 21, the fifth bundle of fourteenth cables 25, and the sixth bundle of eighteenth cables 29, respectively. The arrangement of the first current transformer 51 on the cable 200 connected to the second stator winding is not limited thereto.
Embodiments three and four show different embodiments of the cable fault detection apparatus of two sets of stator windings, but the present embodiment is not limited to the above two embodiments.
Alternatively, as shown in fig. 6, with the cable fault detection apparatus of the above embodiment, a first analog-to-digital conversion circuit 61 communicatively connected with the PLC controller 7 is further included, and the first current transformers 51 are respectively connected with the first analog-to-digital conversion circuit 61.
Optionally, for the cable fault detection apparatus of the above embodiment, a second current transformer 52 is further included, the second current transformer 52 is disposed on a ground wire of the tower 3 of the wind turbine generator system, and the second current transformer 52 is in communication connection with the PLC controller 7.
The second current transformer 52 is configured to detect a ground current of the tower 3 and send the ground current to the PLC controller 7, and if the PLC controller 7 determines that the ground current detected by the second current transformer 52 exceeds a preset value, for example, exceeds 10mA, it is determined that a connection pipe in contact with a cable pair may be blown, the blown cable is overlapped on the tower 3, and at this time, the PLC controller 7 also determines that a cable has a fault and reports the fault.
Optionally, the second current transformer 52 may also detect whether there is a leakage or ground discharge condition of other electrical components of the wind turbine generator system. Meanwhile, whether the wind generating set is hit by thunder or not can be detected. At this time, the PLC controller 7 may also determine that a fault occurs according to an abnormality in the detection value of the second current transformer 52, and perform a fault report, thereby further ensuring the personal safety of field workers.
Optionally, for the cable fault detection apparatus of the above embodiment, a second analog-to-digital conversion circuit 62 is further included, which is in communication connection with the PLC controller 7, and the second current transformer 52 is connected with the second analog-to-digital conversion circuit 62.
Optionally, the tower 3 is grounded through a plurality of grounding wires, and the second current transformer 52 is disposed on the grounding wire with the shortest distance from the main control cabinet of the wind turbine generator system. This prevents signal degradation of the second current transformer 52 in the case of a long wiring.
The embodiment of the utility model provides an on the other hand provides a wind generating set, has like aforementioned cable fault detection device.
The embodiment of the utility model provides a cable fault detection device, through setting up at least part of first current transformer on the cable of different bundles and different phases, and with first current transformer respectively with PLC controller communication connection, on the basis that need not every cable and all set up current transformer, detection that can be accurate and judgement have the cable to break down, and carry out the report and the processing of trouble, can improve wind generating set's reliability and security by a wide margin, can in time detect and handle cable fault, reduce the influence of cable fault to wind generating set operation, eliminate the trouble at the initial stage, wind generating set's operation safety has been ensured. Meanwhile, the number of the current transformers is reduced, the cost is reduced, and the data processing capacity of the PLC is reduced.
Further, the embodiment of the utility model provides a cable fault detection device can also detect and the fault report to the ground electric current of complete machine, and the power cable overlap joint that has the fusing is on a tower section of thick bamboo, in time reports to the police, guarantees unit tower section of thick bamboo lower part staff's personal safety.
The embodiment of the utility model provides a wind generating set can realize the detection and the trouble report of cable fault with lower cost, has higher reliability and security.
Further, the embodiment of the utility model provides a wind generating set can also detect and the fault report ground current of unit, has also promoted wind generating set's security.
The above description is only for the specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. The utility model provides a wind generating set's cable fault detection device, wind generating set includes stator winding, each looks in stator winding's A looks, B looks and the C looks is connected with two piece at least parallel connection's cable respectively, and every three cable centre grippings of connecting same winding's A looks, B looks and C looks are a bundle, its characterized in that: the cable fault detection device comprises a PLC (programmable logic controller) and a plurality of first current transformers (51), wherein at least part of the first current transformers (51) are arranged on cables which are bundled in different bundles and are out of phase, and the first current transformers (51) are respectively in communication connection with the PLC (7).
2. The cable fault detection device according to claim 1, wherein the stator winding is a set, and two cables connected in parallel are connected to each of the phases a, B and C of the stator winding; the cable is divided into two bundles; the number of the first current transformers (51) is three, wherein two first current transformers (51) are arranged on any two-phase cables in the A phase, the B phase and the C phase in one cable bundle, and the other first current transformer (51) is arranged on a third-phase cable in the A phase, the B phase and the C phase in the other cable bundle.
3. The cable fault detection device of claim 1, wherein the stator winding is a set, and three cables connected in parallel are connected to each of the phases a, B and C of the stator winding; the cables are divided into three bundles; the number of the first current transformers (51) is three, wherein the three first current transformers (51) are respectively arranged on different bundles of cables with different phases.
4. The cable fault detection device according to claim 1, wherein the stator windings are provided in two groups, and two cables connected in parallel are connected to each of the phases a, B and C of the stator windings; the cable is divided into two bundles; the number of the first current transformers (51) is six, and every three first current transformers (51) detect cables of a group of stator windings; wherein,
for one stator winding, two first current transformers (51) are arranged on cables of any two phases of A phase, B phase and C phase in a bundle of cables, and the other first current transformer (51) is arranged on a cable of a third phase of A phase, B phase and C phase in the other bundle of cables.
5. The cable fault detection device of claim 1, wherein the stator windings are in two groups, and three cables connected in parallel are connected to each of the phases a, B and C of the stator windings; the number of the first current transformers (51) is six, and every three first current transformers (51) detect cables of a group of stator windings; wherein,
for one stator winding, three first current transformers (51) are arranged on different bundles of cables of different phases, respectively.
6. The cable fault detection device according to claim 1, further comprising first analog-to-digital conversion circuits (61) communicatively connected to the PLC controller (7), the first current transformers (51) being respectively connected to the first analog-to-digital conversion circuits (61).
7. The cable fault detection device according to claim 1, further comprising a second current transformer (52), wherein the second current transformer (52) is arranged on a grounding wire of a tower (3) of the wind generating set, and the second current transformer (52) is in communication connection with the PLC controller (7).
8. The cable fault detection device of claim 7, further comprising a second analog-to-digital conversion circuit (62) communicatively coupled to the PLC controller (7), the second current transformer (52) being coupled to the second analog-to-digital conversion circuit (62).
9. The cable fault detection device according to claim 7, wherein the tower (3) is grounded via a plurality of ground wires, and the second current transformer (52) is arranged on the ground wire with the shortest distance from a main control cabinet of the wind turbine generator system.
10. A wind park according to any of claims 1-9, having a cable fault detection device.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11199177B2 (en) | 2016-12-22 | 2021-12-14 | Vestas Wind Systems A/S | Detecting electrical failures in a wind turbine generator control system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11199177B2 (en) | 2016-12-22 | 2021-12-14 | Vestas Wind Systems A/S | Detecting electrical failures in a wind turbine generator control system |
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