CN216950697U - Wind turbine generator system safety precaution system - Google Patents
Wind turbine generator system safety precaution system Download PDFInfo
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- CN216950697U CN216950697U CN202220279610.XU CN202220279610U CN216950697U CN 216950697 U CN216950697 U CN 216950697U CN 202220279610 U CN202220279610 U CN 202220279610U CN 216950697 U CN216950697 U CN 216950697U
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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
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- 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 discloses a safety early warning system for a wind turbine generator, and belongs to the field of wind turbine generators. The safety early warning system comprises a feedback loop which is connected in series on a main safety chain of the wind turbine generator, wherein a plurality of overload air protection switches which are arranged inside a pitch control cabinet are connected in series on the feedback loop, a plurality of plugging and unplugging switches which are arranged at the positions which are easy to be misplaced on the pitch control cabinet, a pitch motor, a pitch speed reducer and a pitch control cable, and a plurality of micro-motion feedback switches which are arranged at blade bolts, wherein the disconnection of any one switch can cause the disconnection of the feedback loop, so that the early warning effect is realized. The feedback loop provided with the switches is added on the basis of the existing main safety chain, so that the safety chain is reasonable and simple in structure, the original control structure is not required to be damaged, the technical improvement of installation is facilitated, the falling condition of internal parts of the hub can be fed back in time, the problems can be found as soon as possible, the alarm is given in time, the potential safety hazard is reduced, the safety is greatly improved, the cost performance is high, and the universality is good.
Description
Technical Field
The utility model relates to the field of wind turbines, in particular to a safety early warning system for a wind turbine.
Background
With the development of the wind power industry, the safety monitoring technology of the wind generating set is more and more perfect, the hub is always in a rotating state in the safety early warning mechanism of the wind generating set, in the early warning mechanism of each fan factory, the warning nodes of related safety chains are only controlled by the gravity points of over-speed of the hub, error state of a variable pitch frequency converter, exceeding of working positions of blades and the like, and the internal mechanical mechanism is neglected due to fewer problems relative to electrical control. However, when an actual wind power plant operates, due to the redundancy problem of a mechanical mechanism of a fan design, a workshop installation process, the abrasion of mechanical parts and other factors, the risk of the failure of the mechanical mechanism in a hub of a wind generating set is greatly increased, and in addition, a related safety alarm device is not added in the safety design of the original fan, after the failure such as the breakage of a blade bolt, the separation of a variable-pitch cabinet door, the infirm fixation of a control main line and the like occurs in the operation and the maintenance of the fan, the damage can be always caused in the rotating hub, and the existing safety early warning shutdown of the fan can be triggered unless an electric part is broken or the blade is clamped, so that the accident is expanded, and the normal operation of the wind generating set is influenced.
Therefore, the existing wind turbine safety early warning system obviously has inconvenience and defects in structure, method and use, and needs to be further improved. How can establish a new wind turbine generator system safety precaution system, make it in time report to the police when the part drops in wind turbine generator system wheel hub, reduce the harm to the fan, avoid the fan occurence of failure, compensate wind turbine generator system wheel hub mechanical part and drop and cause the potential safety hazard, make wind turbine generator system's security promoted greatly, simultaneously, low cost, the sexual valence relative altitude, the commonality is good, is worth wind-powered electricity generation trade personnel deep research.
SUMMERY OF THE UTILITY MODEL
The technical problem to be solved by the utility model is to provide a wind turbine safety early warning system, which can give an alarm in time when a part falls off in a hub of the wind turbine, reduce the damage to a fan, avoid the occurrence of fan accidents, make up for potential safety hazards caused by the falling of mechanical parts of the hub of the wind turbine, greatly improve the safety of the wind turbine on the basis of low cost, and has high cost performance and good universality. Therefore, the defects of the existing wind turbine safety early warning system are overcome.
In order to solve the technical problems, the utility model provides a wind turbine generator safety early warning system which comprises a feedback loop connected in series with a main safety chain of the wind turbine generator, wherein the feedback loop is connected in series with a plurality of overload air protection switches arranged inside a variable pitch control cabinet, a plurality of plugging and unplugging switches arranged at the positions which are easy to be misplaced on the variable pitch control cabinet, a variable pitch motor, a variable pitch speed reducer and a variable pitch control cable, and a plurality of micro-motion feedback switches arranged at blade bolts, wherein the disconnection of any one switch can cause the disconnection of the feedback loop, so that the early warning effect is realized.
In a further improvement, six overload air protection switches which are respectively arranged in the three variable pitch control cabinets are connected in series on the feedback loop.
In a further improvement, the overload air protection switch is arranged in an outlet loop of the blade limit switch in the variable pitch control cabinet.
In a further improvement, the overload air protection switch adopts a 24V and 2A overload air protection switch.
The improved structure is characterized in that the pulling and inserting switch on the feedback loop is a lantern-shaped elastic piece pulling and inserting switch which is composed of a copper male head with an elastic reed and a copper female head with a locking groove.
The lantern-shaped elastic piece plugging switch is further improved, and the lantern-shaped elastic piece plugging switch is fixed at the position where the pitch control cabinet, the pitch motor, the pitch reducer and the pitch control cable are prone to being misplaced through self-adhesive fixing.
The improved structure is characterized in that a contact and a spring piece are arranged inside the micro-motion feedback switch, a trigger piece is arranged outside the micro-motion feedback switch, and the micro-motion feedback switch is arranged at the position of the hub wall above a blade bolt bearing large tensile stress when the blade rotates to 0 degree.
In a further improvement, fifteen micro-feedback switches are connected in series on the feedback loop, and the fifteen micro-feedback switches are respectively arranged at the positions of the hub wall above the five blade bolts bearing high tensile stress.
In a further improvement, the lines of the feedback loop are connected in series by using 0.5 square millimeter wires.
In a further improvement, the feedback loop is connected in series with a safety chain link point of the wind turbine main safety chain, wherein the variable pitch working position of the safety chain link point exceeds the limit.
After adopting such design, the utility model has at least the following advantages:
according to the wind turbine safety early warning system, the feedback loop with the switches is additionally arranged on the basis of the existing main safety chain, the structure is reasonable and simple, the original control structure is not required to be damaged, the mounting technical improvement is facilitated, the falling condition of internal parts of the hub can be timely fed back, the problem can be found as early as possible, the early warning is given out, the potential safety hazard caused by the falling of mechanical parts of the hub of the wind turbine is avoided, the safety of the wind turbine is greatly improved on the basis of low cost, the cost performance is high, and the universality is good.
Drawings
The foregoing is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and the detailed description.
FIG. 1 is a schematic structural diagram of a wind turbine safety early warning system of the present invention.
Detailed Description
The utility model relates to an improvement of the existing main safety chain of a wind turbine generator, which is a hardware protection system independent of a PLC control system of the wind turbine generator and is used for connecting fault nodes which can cause serious damage to the wind turbine generator in series to form a loop. Safety chain link points in the existing main safety chain comprise 13 levels of safety chain power supply circuit fuses, emergency stop buttons, impeller overspeed brakes (emergency brake circuit safety chains), three blade errors (emergency brake circuit safety chains), detection of generator overspeed by a cabin converter, cabin vibration, impeller overspeed, a watchdog, brake positions, exceeding of a variable-pitch working position, hub driving faults, maintenance of storage relays and the like, wherein the safety chain nodes are all connected in series through a 24v power supply circuit, when all nodes are normally closed, 24v power supply can be fed back to a main control system, and a fan displays normally; once any one of the nodes is abnormal, the whole loop is powered off, the main control system cannot receive a 24v power supply signal, and the blades of the fan are feathered and the high-speed brake is locked according to the situation, so that the fan is stopped, and the main control system and the converter system are in a locked state. If the fault node cannot be recovered, the normal operation and operation of the whole unit cannot be realized. Meanwhile, the main safety chain is positioned after the software protection of the wind turbine generator and is the last protection of the whole wind turbine generator.
The utility model is to add a feedback loop on the basis of the existing main safety chain of the wind turbine generator, so that the feedback loop can give an alarm when the parts in the hub fall off in time, reduce the damage of the parts falling on the fan, avoid the fan accident and reduce the potential safety hazard. Specific examples thereof are as follows.
Referring to the attached drawing 1, the wind turbine safety early warning system in the embodiment includes a feedback loop connected in series to a main safety chain 1 of the wind turbine, and the feedback loop is specifically connected in series to a safety chain node 2 of the main safety chain of the wind turbine, where a pitch control working position of the safety chain exceeds a limit. As shown in the attached drawing 1, the left side of the dotted line is the original main safety chain system of the fan, the right side is the added feedback loop 3, and each fan hub comprises three sets of wind turbine generator safety early warning systems shown in the attached drawing 1.
The feedback loop 3 is connected with a plurality of overload air protection switches 8 arranged inside the pitch control cabinet 4 in series, a plurality of plugging and unplugging switches 10 arranged at the positions which are easy to be misplaced on the pitch control cabinet 4, the pitch motor 6, the pitch speed reducer and the pitch control cable 5 and a plurality of micro feedback switches 9 arranged at the blade bolts 7, wherein the disconnection of any switch can cause the disconnection of the feedback loop, so that the early warning effect is realized.
Specifically, the feedback loop 3 is connected in series with six overload air protection switches 8 respectively arranged inside the three pitch control cabinets 4. The overload air protection switch 8 is a 24V and 2A overload air protection switch, is arranged in an outlet loop of a blade limit switch in the variable pitch control cabinet 4, and is used for preventing the damage of devices in a main safety chain loop caused by the grounding of a bare and leaked line when a signal line is damaged.
In this embodiment, the plug switch 10 on the feedback loop 3 is a lantern-shaped elastic piece plug switch, and the lantern-shaped elastic piece plug switch is composed of a copper male head with an elastic reed and a copper female head with a locking groove. The lantern type elastic piece plugging switch is fixed at the position, which is easy to misplace, of the variable pitch control cabinet 4, the variable pitch motor 6, the variable pitch speed reducer and the variable pitch control cable 5 through self-adhesive fixing paste, and is used for disconnecting the male head and the female head fixed on the parts when the parts fall down or are displaced greatly, and then disconnecting the whole safety chain loop to play a role in alarming.
In this embodiment, the micro-feedback switch 9 has a contact and a spring piece inside, and a trigger piece outside, and the micro-feedback switch 9 is disposed at a hub wall position above the blade bolt 7 that bears a large tensile stress when the blade rotates to 0 degree. Fifteen micro-motion feedback switches 9 are connected in series on the feedback loop 3, and the fifteen micro-motion feedback switches 9 are respectively arranged at the hub wall positions above the five blade bolts 7 bearing large tensile stress. Therefore, when the blade bolt is broken, the bolt head bounces up the trigger piece of the micro-motion feedback switch, and then the whole safety chain loop is disconnected, so that the alarm effect is achieved.
In this embodiment, the circuit of the feedback loop 3 adopts a 0.5 mm square wire to connect in series, and is used for connecting the above-mentioned switching components in series to form a feedback branch, and then connecting in series into the original safety chain 1 of the fan. Meanwhile, if unfixed foreign matters appear in the hub, the feedback circuit can be damaged, and a certain early warning effect can be achieved.
The safety early warning system of the wind turbine generator system breaks off an overrun node of a working position of a variable pitch blade, leads out a 0.5 square millimeter line, firstly passes through an overload air protection switch 8 in a variable pitch control cabinet 4, then passes through a lantern type elastic piece plugging switch 10 arranged at a key position which is easy to misplace on the variable pitch control cabinet 4, a variable pitch motor 6, a speed reducer and a variable pitch control cable 5, passes through a micro-motion feedback switch 9 at a blade bolt 7, and finally returns to the position of the overrun node break of the working position of the blade, so that a feedback branch of the safety early warning system is connected into a loop of a main safety chain 1 of the wind turbine.
The working principle of the wind turbine generator safety early warning system is that when a variable pitch control cabinet door falls, the variable pitch control cabinet is separated from a hub wall fixed point, a combination position of a variable pitch motor and a variable pitch speed reducer is staggered or separated, the variable pitch speed reducer is separated from a hub fixed surface, and a variable pitch control cable shakes seriously to generate displacement, male and female heads of a lantern-shaped elastic piece plugging switch 10 fixed on the components are forced to be disconnected, and at the moment, a fan main control system cannot receive 24V power supply feedback to control the fan to stop; and when the blade rotates to the 0-degree position, if the torque generated by wind exceeds the torque controlled by the variable pitch motor, several bolts 7 with the largest tensile stress are suddenly broken, so that the micro feedback switch 9 at the position is triggered to disconnect the internal contacts, the 24V power supply of the feedback loop cannot be fed back to the main control system of the fan, the main control system controls the fan to rapidly feather and brake and stop in a pneumatic mode, namely, the timely early warning that the internal part of the hub falls is completed, and the further damage of the fan is avoided.
Of course, the reason for the blade bolt fracture may also be caused by torque maintenance failure, mounting process failure or mechanical fatigue, and the wind turbine generator safety early warning system can be used for timely early warning.
The safety early warning system of the wind turbine generator set is reasonable and simple in structure, does not need to damage the original control structure, is convenient to install, technically improve and low in cost, is suitable for a fan which has been operated for many years, can effectively improve the operation safety of the fan, reduces the phenomenon that objects fall off and continuously smash electrical equipment in a hub, and the fan is not stopped due to faults until the electrical equipment is damaged or blades are clamped, so that early warning is timely performed in advance, the expansion of accidents is avoided, the cost performance is high, and the universality is good.
In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not 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; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in a specific case to those of ordinary skill in the art.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the present invention in any way, and it will be apparent to those skilled in the art that the above description of the present invention can be applied to various modifications, equivalent variations or modifications without departing from the spirit and scope of the present invention.
Claims (10)
1. The safety early warning system is characterized by comprising a feedback loop which is connected in series on a main safety chain of the wind turbine, wherein a plurality of overload air protection switches which are arranged inside a pitch control cabinet are connected in series on the feedback loop, a plurality of plugging and unplugging switches which are arranged at the positions which are easy to be misplaced on the pitch control cabinet, the pitch motor, the pitch speed reducer and the pitch control cable, and a plurality of micro-motion feedback switches which are arranged at blade bolts, wherein the disconnection of any one switch can cause the disconnection of the feedback loop, so that the early warning effect is realized.
2. The wind turbine generator safety pre-warning system of claim 1, wherein six overload air protection switches respectively disposed inside three pitch control cabinets are connected in series to the feedback loop.
3. The wind turbine generator safety pre-warning system of claim 2, wherein the overload air protection switch is disposed in an outlet loop of a blade limit switch in the pitch control cabinet.
4. The wind turbine generator safety pre-warning system according to claim 3, wherein the overload air protection switch is a 24V, 2A overload air protection switch.
5. The wind turbine generator safety early warning system according to claim 1, wherein the plug switch on the feedback loop is a lantern-shaped elastic piece plug switch, and the lantern-shaped elastic piece plug switch is composed of a copper male head with an elastic reed and a copper female head with a locking groove.
6. The wind turbine generator system safety pre-warning system according to claim 5, wherein the lantern-shaped spring piece plugging switch is fixed at a position where the pitch control cabinet, the pitch motor, the pitch reducer and the pitch control cable are prone to being dislocated through self-adhesive fixing.
7. The wind turbine generator safety pre-warning system according to claim 1, wherein the micro-feedback switch is provided with a contact and a spring piece inside, and a trigger piece outside, and is arranged at a hub wall position above a blade bolt which bears a large tensile stress when the blade rotates to 0 degree.
8. The wind turbine generator safety pre-warning system according to claim 7, wherein fifteen micro-feedback switches are connected in series to the feedback loop, and the fifteen micro-feedback switches are respectively arranged at the hub wall position above five blade bolts bearing high tensile stress.
9. The wind turbine generator safety pre-warning system of claim 1, wherein a line of the feedback loop is connected in series by a 0.5 mm square wire.
10. The wind turbine generator safety pre-warning system according to any one of claims 1 to 9, wherein the feedback loop is connected in series at a safety chain link point on the main safety chain of the wind turbine generator where a pitch operating position is out of limit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220279610.XU CN216950697U (en) | 2022-02-11 | 2022-02-11 | Wind turbine generator system safety precaution system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220279610.XU CN216950697U (en) | 2022-02-11 | 2022-02-11 | Wind turbine generator system safety precaution system |
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| Publication Number | Publication Date |
|---|---|
| CN216950697U true CN216950697U (en) | 2022-07-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202220279610.XU Active CN216950697U (en) | 2022-02-11 | 2022-02-11 | Wind turbine generator system safety precaution system |
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| CN (1) | CN216950697U (en) |
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- 2022-02-11 CN CN202220279610.XU patent/CN216950697U/en active Active
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Address after: F17, Block C, International Investment Building, No. 6-9, Fuchengmen North Street, Xicheng District, Beijing 100,034 Patentee after: Longyuan (Beijing) New Energy Engineering Technology Co.,Ltd. Address before: 100034 11th floor, block C, international investment building, 6-9 Fuchengmen North Street, Xicheng District, Beijing Patentee before: LONGYUAN (BEIJING) WIND POWER ENGINEERING TECHNOLOGY Co.,Ltd. |