CN217904032U - Stator contactor redundancy control device of double-fed wind generating set - Google Patents
Stator contactor redundancy control device of double-fed wind generating set Download PDFInfo
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- CN217904032U CN217904032U CN202220323728.8U CN202220323728U CN217904032U CN 217904032 U CN217904032 U CN 217904032U CN 202220323728 U CN202220323728 U CN 202220323728U CN 217904032 U CN217904032 U CN 217904032U
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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Abstract
The utility model provides a redundant controlling means of double-fed wind generating set stator contactor, including converter controller, UPS, master control and stator contactor, stator contactor divide-shut brake converter control relay K11, stator contactor divide-shut brake master control relay K40, stator contactor power supply master control relay K44, converter control stator contactor divide-shut brake control contactor K39, master control stator contactor divide-shut brake control contactor K41, converter control stator contactor power supply circuit contactor K43, master control stator contactor power supply circuit contactor K45. The utility model discloses an increase the UPS power control that the master control divides disconnected control of stator contactor and supplies power to stator contactor, when guaranteeing that converter control signal or relay appear unusually, guarantee that stator contactor can in time divide absolutely, improve the reliability of system, guarantee wind generating set's safety and stability operation.
Description
Technical Field
The utility model belongs to wind generating set control field especially relates to a redundant controlling means of double-fed wind generating set stator contactor.
Background
The stator contactor of the early part double-fed wind generating set is only controlled by a converter, when the set reaches a grid-connected condition, the converter gives a stator contactor closing instruction, the stator contactor is closed, and the set is connected to the grid; when the unit stops in breeze or fault, the converter gives a breaking instruction of the stator contactor, the stator contactor is disconnected, and the unit is off-line. When the condition that a breaking control loop of a stator contactor is controlled to be abnormal by the converter, the stator contactor is kept closed all the time and cannot be disconnected after the machine set gives a disconnection instruction, the converter can generate an overvoltage condition due to overlong duration, the converter can relieve the overvoltage condition through Crowbar and direct current Chopper action at the moment, and the condition that devices of the converter cannot break down due to overvoltage is guaranteed. The rotating speed of the unit is gradually reduced until the unit stops rotating, but because the stator of the generator is always in a grid-connected state, the stator can absorb large energy from a power grid, the winding of the generator can be heated and over-heated, the unit is finally ignited, and large potential safety hazards exist.
The problem that current doubly-fed wind generating set stator contactor divides disconnected control design scheme to exist is: under the condition that the abnormal condition appears in converter control stator contactor disjunction control circuit, there is not redundant control protection, can arouse when the stator contactor can't in time disjunction and net break that the generator winding is overheated, finally leads to the unit to catch fire, has great potential safety hazard.
Disclosure of Invention
In order to overcome the defect that prior art exists, the utility model provides a redundant controlling means of double-fed wind generating set stator contactor appears in order to prevent to lead to the unable effective disconnected condition of stator grid-connected contactor to appear unusually appearing in converter control circuit, can introduce the redundant control function of master control in stator contactor control circuit, and when the abnormal condition appears, the master control can realize dividing of stator contactor apart outside being independent of the converter, improves the reliability of system, guarantees the safety and stability operation of unit.
The utility model provides a technical scheme that its technical problem adopted is:
a stator contactor redundancy control device of a double-fed wind generating set comprises a converter controller, a UPS, a master control contactor and a stator contactor, a stator contactor on-off converter control relay K11, a stator contactor on-off master control relay K40, a stator contactor power supply master control relay K44, a converter control stator contactor on-off control contactor K39, a master control stator contactor on-off control contactor K41, a converter control stator contactor power supply loop contactor K43 and a master control stator contactor power supply loop contactor K45; the K11-A1 of the relay K11 is connected with the converter controller, and the K11-A2 of the relay K11 is connected with the negative electrode of the 24V power supply; contacts K11-14 of the relay K11 are connected with the UPS-L, and contacts K11-11 of the relay K11 are connected with K39-A1 of the contactor K39; the K40A1 of the relay K40 is connected with a master control, and the K40-A2 of the relay K40 is connected with the negative electrode of a 24V power supply; a contact K40-11 of the relay K40 is connected with the UPS-L, and a contact K40-14 of the relay K40 is connected with a contact K41-A1 of the contactor K41; K39-A1 of the contactor K39 is connected with a contact K11-11 of K11, and K39-A2 of K39 is connected with UPS-N; a contact K39-1 of the contactor K39 is connected with a contact K45-1 of the K45, and a contact K39-2 of the K39 is connected with a contact K41-1 of the K41; K41-A1 of the contactor K41 is connected with a contact K40-14 of K40, and K41-A2 of the contactor K41 is connected with UPS-N; a contact K41-1 of the contactor K41 is connected with a contact K39-2 of the contactor K39, and a contact K41-2 of the contactor K41 is connected with a stator contactor D1; K43-A1 of the contactor K43 is connected with a converter controller, and K43-A2 of the contactor K43 is connected with UPS-N; k43-1 and K43-3 of a contact of the contactor K43 are respectively connected with UPS-L and UPS-N, and K43-2 and K43-4 of the contact of the contactor K43 are respectively connected with K45-1 and K45-3 of a contact of the contactor K45; the K45-A1 of the contactor K45 is connected with the contact K44-12 of the relay K44, and the K45-A2 of the K45 is connected with the UPS-N; k45-1 and K45-3 of a contact of the contactor K45 are respectively connected with K43-2 and K43-4 of a contact of the contactor K43, and K45-2 and K45-4 of the contact of the contactor K45 are respectively connected with K39-1 of a contact of the contactor K39 and a stator contactor D2; K44-A1 of the relay K44 is connected with a master control, and K44-A2 of the relay K44 is connected with the negative electrode of a 24V power supply; k44-11 of the relay K44 contact is connected with the UPS-L, and K44-12 of the K44 contact is connected with K45-A1 of the contactor K45.
The technical conception of the utility model is that: the problem of the existing breaking control design scheme of the stator contactor of the doubly-fed wind generating set is as follows: under the condition that the abnormal condition appears in converter control stator contactor disjunction control circuit, there is not redundant control protection, can arouse when the stator contactor can't in time disjunction and net break that the generator winding is overheated, finally leads to the unit to catch fire, has great potential safety hazard. Therefore, the utility model provides a redundant controlling means of double-fed wind generating set stator contactor guarantees that stator contactor can in time divide absolutely when converter control signal or relay appear unusually through increasing the UPS power control that the master control divides the disconnected control of stator contactor and supplies power to the stator contactor, improves the reliability of system, guarantees wind generating set's safety and stability operation.
The K11 relay is a stator contactor opening and closing converter control relay and is used for controlling a K39 contactor coil; the K40 relay is a master control relay for opening and closing the stator contactor and is used for controlling K,41 contactor coils; the K44 relay is a main control relay for supplying power to the stator contactor and is used for controlling a K45 contactor coil; the K39 contactor and the K41 contactor are stator contactor opening and closing control contactors corresponding to the converter and the master control relay respectively, and the stator contactors can be closed only when the converter and the master control simultaneously issue a closing instruction; and the K43 and the K45 are power supply loop contactors of the stator contactors corresponding to the converter and the master control relay respectively, and when the stator contactors or the K39 and K41 contactors are abnormal, the power supply of 220V of the stator contactor can be cut off, so that the stator contactor is switched off in time.
Under the condition that a converter controls a stator contactor to break and control a loop normally, after a unit is shut down by a small wind or a fault, the converter gives a breaking instruction of the stator contactor after the load reduction of a machine side module is finished, the coil of a K11 relay is powered off, the contact of the K11 relay is changed from a normally closed state to a normally open state, the coil of a K39 contactor is powered off, the contact of the K39 contactor is changed from the normally closed state to the normally open state, the coil of the stator contactor is powered off, the contact of the stator contactor is changed from the normally closed state to the normally open state, and a generator stator is disconnected.
Under the condition that a stator contactor breaking control loop controlled by the converter is abnormal, after a unit stops due to low wind or fault, the converter gives a stator contactor breaking instruction after the load reduction of a machine side module is finished, but a contact of a K11 relay is always in a normally closed state, so that the stator contactor cannot be disconnected and disconnected. At the moment, the master control gives a stator contactor off-network instruction, the coil of the K40 relay is powered off, the contact of the K40 relay is changed into a normally open state from a normally closed state, the coil of the K41 contactor is powered off, the contact of the K41 contactor is changed into a normally open state from a normally closed state, the coil of the stator contactor is powered off, the contact of the stator contactor is changed into a normally open state from a normally closed state, and the stator of the generator is off-network.
Under the condition that a breaking control loop of the converter and the main control stator contactor is abnormal, after a unit stops due to low wind or fault, the converter and the main control give a breaking instruction of the stator contactor after the load reduction of the machine side module is finished, but contacts of the K11 relay and the K40 relay are always in a normally closed state, so that the stator contactor cannot be disconnected and disconnected. At the moment, the converter and the master control simultaneously give an instruction for cutting off the UPS, the coil of the K43 contactor loses power, and the contact of the K43 contactor is changed from a normally closed state to a normally open state; the coil of the K44 relay is in a power-off state, the contact of the K44 relay is in a normally-open state from a normally-closed state, the coil of the K45 contactor is in a power-off state, and the contact of the K45 contactor is in a normally-open state from a normally-closed state. Finally, the UPS is disconnected, the coil of the stator contactor loses power, the contact of the stator contactor is changed from a normally closed state to a normally open state, and the stator of the generator is disconnected.
Under the condition that the inverter controls the breaking control loop of the stator contactor to be abnormal, the breaking control of the stator contactor and the UPS control for supplying power to the stator contactor are added through the main control, so that when the inverter control signal or the relay is abnormal, the stator contactor can be timely broken, the reliability of a system is improved, and the safe and stable operation of the wind generating set is guaranteed.
The utility model has the advantages that: the reliability of the system is improved, and the safe and stable operation of the unit is ensured.
Drawings
FIG. 1 is a current diagram of a stator contactor redundancy control device of a doubly-fed wind generating set.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
Referring to fig. 1, the stator contactor redundancy control device of the double-fed wind generating set comprises a converter controller, a UPS, a main control contactor and a stator contactor, a stator contactor opening and closing converter control relay K11, a stator contactor opening and closing main control relay K40, a stator contactor power supply main control relay K44, a converter control stator contactor opening and closing control contactor K39, a main control stator contactor opening and closing control contactor K41, a converter control stator contactor power supply loop contactor K43 and a main control stator contactor power supply loop contactor K45; K11-A1 of the relay K11 is connected with a converter controller, and K11-A2 of the relay K11 is connected with the negative electrode of a 24V power supply; contacts K11-14 of the relay K11 are connected with the UPS-L, and contacts K11-11 of the relay K11 are connected with K39-A1 of the contactor K39; the K40A1 of the relay K40 is connected with a master control, and the K40-A2 of the relay K40 is connected with the negative electrode of a 24V power supply; a contact K40-11 of the relay K40 is connected with the UPS-L, and a contact K40-14 of the relay K40 is connected with a contact K41-A1 of the contactor K41; K39-A1 of the contactor K39 is connected with a contact K11-11 of K11, and K39-A2 of K39 is connected with UPS-N; a contact K39-1 of the contactor K39 is connected with a contact K45-1 of the K45, and a contact K39-2 of the K39 is connected with a contact K41-1 of the K41; K41-A1 of the contactor K41 is connected with a contact K40-14 of K40, and K41-A2 of the contactor K41 is connected with UPS-N; a contact K41-1 of the contactor K41 is connected with a contact K39-2 of the contactor K39, and a contact K41-2 of the contactor K41 is connected with a stator contactor D1; the K43-A1 of the contactor K43 is connected with the converter controller, and the K43-A2 of the contactor K43 is connected with the UPS-N; k43-1 and K43-3 of a contact of the contactor K43 are respectively connected with UPS-L and UPS-N, and K43-2 and K43-4 of the contact of the contactor K43 are respectively connected with K45-1 and K45-3 of a contact of the contactor K45; the K45-A1 of the contactor K45 is connected with the contact K44-12 of the relay K44, and the K45-A2 of the contactor K45 is connected with the UPS-N; k45-1 and K45-3 of a contact of the contactor K45 are respectively connected with K43-2 and K43-4 of a contact of the contactor K43, and K45-2 and K45-4 of the contact of the contactor K45 are respectively connected with K39-1 of a contact of the contactor K39 and a stator contactor D2; K44-A1 of the relay K44 is connected with a master control, and K44-A2 of the relay K44 is connected with the negative electrode of a 24V power supply; k44-11 of the relay K44 contact is connected with the UPS-L, and K44-12 of the K44 contact is connected with K45-A1 of the contactor K45.
The K11 relay is a stator contactor opening and closing converter control relay and is used for controlling a K39 contactor coil; the K40 relay is a master control relay for opening and closing the stator contactor and is used for controlling K,41 contactor coils; the K44 relay is a main control relay for supplying power to the stator contactor and is used for controlling a K45 contactor coil; the K39 contactor and the K41 contactor are stator contactor opening and closing control contactors corresponding to the converter and the master control relay respectively, and the stator contactors can be closed only when the converter and the master control simultaneously issue a closing instruction; and the K43 and the K45 are stator contactor power supply loop contactors corresponding to the converter and the master control relay respectively, and when the stator contactor or the K39 and K41 contactors are abnormal, the power supply of the stator contactor is cut off by 220V, so that the stator contactor is cut off in time.
In this embodiment, the converter controller is a machine side control board in fig. 1.
Under the condition that a stator contactor breaking control loop is normally controlled by a converter, after a unit is shut down by low wind or faults, the converter gives a stator contactor breaking instruction after load reduction of a machine side module is finished, the coil of a K11 relay is powered off, the contact of the K11 relay is changed from a normally closed state to a normally open state, the coil of a K39 contactor is powered off, the contact of the K39 contactor is changed from a normally closed state to a normally open state, the coil of the stator contactor is powered off, the contact of the stator contactor is changed from the normally closed state to the normally open state, and a generator stator is disconnected from a network.
Under the condition that a current transformer controls a stator contactor to break and control a loop to be abnormal, after a unit is shut down by small wind or faults, the current transformer gives a breaking instruction of the stator contactor after the load reduction of a machine side module is finished, but a contact of a K11 relay is always in a normally closed state, so that the stator contactor cannot be disconnected and disconnected. At the moment, the master control gives a stator contactor off-network instruction, the coil of the K40 relay is powered off, the contact of the K40 relay is changed into a normally open state from a normally closed state, the coil of the K41 contactor is powered off, the contact of the K41 contactor is changed into a normally open state from a normally closed state, the coil of the stator contactor is powered off, the contact of the stator contactor is changed into a normally open state from a normally closed state, and the stator of the generator is off-network.
Under the condition that a breaking control loop of the converter and the main control stator contactor is abnormal, after a unit stops due to low wind or fault, the converter and the main control give a breaking instruction of the stator contactor after the load reduction of the machine side module is finished, but contacts of the K11 relay and the K40 relay are always in a normally closed state, so that the stator contactor cannot be disconnected and disconnected. At the moment, the converter and the master control simultaneously give an instruction for cutting off the UPS, the coil of the K43 contactor loses power, and the contact of the K43 contactor is changed into a normally open state from a normally closed state; the coil of the K44 relay is powered off, the contact of the K44 relay is changed into a normally open state from a normally closed state, the coil of the K45 contactor is powered off, and the contact of the K45 contactor is changed into a normally open state from a normally closed state. And finally, the UPS is disconnected, the coil of the stator contactor loses electricity, the contact of the stator contactor is changed from a normally closed state to a normally open state, and the generator stator is disconnected.
Under the condition that the inverter controls the breaking control loop of the stator contactor to be abnormal, the breaking control of the stator contactor and the UPS control for supplying power to the stator contactor are added through the main control, so that when the inverter control signal or the relay is abnormal, the stator contactor can be timely broken, the reliability of a system is improved, and the safe and stable operation of the wind generating set is guaranteed.
The embodiments described in this specification are merely examples of implementations of the inventive concepts, which are intended for illustrative purposes only. The scope of the present invention should not be construed as being limited to the specific forms set forth in the following description, but rather should be construed as encompassing all the equivalent technical means which may be conceived by one of ordinary skill in the art based on the teachings of the present invention.
Claims (1)
1. The stator contactor redundancy control device of the double-fed wind generating set is characterized by comprising a converter controller, a UPS, a main control contactor and a stator contactor, wherein the stator contactor opening and closing converter control relay K11, the stator contactor opening and closing main control relay K40, a stator contactor power supply main control relay K44, the converter control stator contactor opening and closing control contactor K39, the main control stator contactor opening and closing control contactor K41, the converter control stator contactor power supply loop contactor K43 and the main control stator contactor power supply loop contactor K45; K11-A1 of the relay K11 is connected with a converter controller, and K11-A2 of the relay K11 is connected with the negative electrode of a 24V power supply; contacts K11-14 of the relay K11 are connected with the UPS-L, and contacts K11-11 of the relay K11 are connected with K39-A1 of the contactor K39; the K40A1 of the relay K40 is connected with a master control, and the K40-A2 of the relay K40 is connected with the negative electrode of a 24V power supply; a contact K40-11 of the relay K40 is connected with the UPS-L, and a contact K40-14 of the relay K40 is connected with a contact K41-A1 of the contactor K41; K39-A1 of the contactor K39 is connected with a contact K11-11 of K11, and K39-A2 of K39 is connected with UPS-N; a contact K39-1 of the contactor K39 is connected with a contact K45-1 of the K45, and a contact K39-2 of the K39 is connected with a contact K41-1 of the K41; the K41-A1 of the contactor K41 is connected with the contact K40-14 of the K40, and the K41-A2 of the contactor K41 is connected with the UPS-N; a contact K41-1 of the contactor K41 is connected with a contact K39-2 of the contactor K39, and a contact K41-2 of the contactor K41 is connected with a stator contactor D1; K43-A1 of the contactor K43 is connected with a converter controller, and K43-A2 of the contactor K43 is connected with UPS-N; k43-1 and K43-3 of a contact of the contactor K43 are respectively connected with UPS-L and UPS-N, and K43-2 and K43-4 of the contact of the contactor K43 are respectively connected with K45-1 and K45-3 of a contact of the contactor K45; the K45-A1 of the contactor K45 is connected with the contact K44-12 of the relay K44, and the K45-A2 of the K45 is connected with the UPS-N; k45-1 and K45-3 of a contact of the contactor K45 are respectively connected with K43-2 and K43-4 of a contact of the contactor K43, and K45-2 and K45-4 of the contact of the contactor K45 are respectively connected with K39-1 of a contact of the contactor K39 and a stator contactor D2; K44-A1 of the relay K44 is connected with a master control, and K44-A2 of the relay K44 is connected with the negative electrode of a 24V power supply; k44-11 of the relay K44 contact is connected with the UPS-L, and K44-12 of the K44 contact is connected with K45-A1 of the contactor K45.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220323728.8U CN217904032U (en) | 2022-02-17 | 2022-02-17 | Stator contactor redundancy control device of double-fed wind generating set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220323728.8U CN217904032U (en) | 2022-02-17 | 2022-02-17 | Stator contactor redundancy control device of double-fed wind generating set |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217904032U true CN217904032U (en) | 2022-11-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220323728.8U Active CN217904032U (en) | 2022-02-17 | 2022-02-17 | Stator contactor redundancy control device of double-fed wind generating set |
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| Country | Link |
|---|---|
| CN (1) | CN217904032U (en) |
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2022
- 2022-02-17 CN CN202220323728.8U patent/CN217904032U/en active Active
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