CN208831143U - A kind of protective device of the wind speed round detection of wind power generating set - Google Patents

Abstract

The utility model relates to wind power generation fields, and in particular to a kind of protective device of the wind speed round detection of wind power generating set, including wind wheel, variable pitch theft-resistant link chain circuit, obliquity sensor and safety guard；The central shaft hole position of the hub body is provided with obliquity sensor；The safety guard includes controller and relay; the normally-closed contact of the relay is electrically connected with the node in variable pitch theft-resistant link chain circuit, solves over speed of rotation monitoring device in theft-resistant link chain circuit present in prior art problem since failure and other reasons lead to not to play a protective role and technological deficiency with high costs.The utility model provides a kind of with accurate and reliable, low in cost and for wind wheel generation provide the protective device of duplicate protection performance.

Description

A kind of protective device of the wind speed round detection of wind power generating set

Technical field

The utility model relates to wind power generation fields, and in particular to a kind of guarantor of the wind speed round detection of wind power generating set Protection unit.

Background technique

In recent years, the installed capacity of wind-driven power in China and generated energy rapid growth are the energy to rank the first in new energy, at For the third-largest energy for being only second to thermoelectricity, water power.Wind energy is that the following needs greatly develop one of the main new energy utilized.Wind The monitoring and protecting scheme in the existing theft-resistant link chain circuit of motor group is all each monitoring node (such as generating unit speed hypervelocity monitoring) series connection It is linked into theft-resistant link chain circuit.When considerable safety failure occurs for unit, if the corresponding incident failure in theft-resistant link chain circuit When monitoring node (security protection monitoring device failure) is not turned off, the theft-resistant link chain circuit of unit can be always maintained at access shape State.It is likely to result in the damage of unit main component, or even the event of the significant damages sexual behaviors such as driving occurs.

Utility model content

For the over speed of rotation monitoring device in theft-resistant link chain circuit present in prior art problem due to failure and other reasons Lead to not to play a protective role and technological deficiency with high costs.The utility model provides a kind of new wind power generating set Wind speed round detection protective device, the protective device of the wind speed round detection of the wind power generating set have it is accurate and reliable, It is low in cost and provide the performance of duplicate protection for wind wheel generation.

The purpose of this utility model is achieved through the following technical solutions:

The utility model provides a kind of protective device of the wind speed round detection of wind power generating set, including wind wheel and variable pitch Theft-resistant link chain circuit further includes obliquity sensor and safety guard；The wind wheel includes hub body and blade, the hub body Central shaft hole position be provided with obliquity sensor；The safety guard includes controller and relay, the controller Input terminal be electrically connected with obliquity sensor, the output end of the controller is electrically connected with relay, the relay it is normally closed Contact is electrically connected with the node in variable pitch theft-resistant link chain circuit.

When hypervelocity failure occurs for wind power generating set, the wind speed round overspeed monitoring appliance in theft-resistant link chain circuit is due to event When the reasons such as barrier can not disconnect theft-resistant link chain circuit, Safety Redundancy protective effect is played in the monitoring that can exceed the speed limit to wind speed round, to Avoid unit due to the failure that exceeds the speed limit, the damage main component that may cause even occurs the significant damage sexual behavior of driving etc. therefore sends out It is raw, reduce unnecessary economic loss；Wind-driven generator group wind-wheel speed detector provided by the present application is suitable for unit and pacifies The wind speed round overspeed monitoring appliance in full chain circuit breaks down, and can not disconnect theft-resistant link chain circuit when wind wheel hypervelocity failure occurs Situation under, to guarantee can to wind speed round exceed the speed limit monitoring safety guard.Safeguard protection as Wind turbines Redundant apparatus to prevent the generation of wind speed round hypervelocity failure, and the series connection of the relay normally closed contact of protective device is linked into Unit safety chain circuit, when wind speed round is more than controller given threshold, the relay normally closed contact of safety guard is closed, Variable pitch theft-resistant link chain circuit disconnects, and plays the role of safeguard protection.

As a further improvement, the safety guard further includes warning device, and the warning device includes and control The buzzer or LED light of device connection processed, warning device issues alarm signal, alarm signal after the normally-closed contact of relay disconnects Buzzing or LED light flashing alarm number can be issued while disconnecting pitch-controlled system theft-resistant link chain circuit.

As a further improvement, the obliquity sensor is single-shaft inclination angle sensor, and in an internal system, speed is It can not

Measurement, but its acceleration can be measured.If initial velocity is it is known that can go out linear speed by integral calculation Degree, and then straight-line displacement can be calculated.

Compared with prior art, the utility model has the beneficial effects that:

Effect one, directly setting obliquity sensor is used to measure wind speed round the utility model in the hub, increases unit Wind speed round exceed the speed limit monitoring node, and the normally-closed contact of relay is connected in series to unit safety chain circuit, as unit safety The redundant apparatus of protection reinforces the safeguard protection performance of unit, and when the failure of wind wheel theft-resistant link chain protective loop itself, the present apparatus is just It will disconnect theft-resistant link chain circuit, play double protection；

Effect two, the hardware component that the utility model uses, is provided with relay in traditional theft-resistant link chain protective loop Normally-closed contact just will disconnect normally-closed contact when wind speed round is excessive, and accuracy with higher, measured value is accurate and reliable, and has Higher economic cost performance, it is of simple structure and low cost.

Detailed description of the invention

Fig. 1 is protective device structural schematic diagram；

Fig. 2 is measuring signal schematic diagram；

Fig. 3 is protective device electrical schematics；

In figure, 1- hub body, 2- blade, 3- obliquity sensor, 4- relay, 5- controller, 6- variable pitch theft-resistant link chain circuit, 7- power supply.

Specific embodiment

It is practical new below in conjunction with this to keep the objectives, technical solutions, and advantages of the embodiments of the present invention clearer Attached drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that described Embodiment be only the utility model a part of the embodiment, instead of all the embodiments.Usually described in attached drawing here It can arrange and design with a variety of different configurations with the component of the utility model embodiment shown.Therefore, below to The detailed description of the embodiments of the present invention provided in attached drawing is not intended to limit the model of claimed invention It encloses, but is merely representative of the selected embodiment of the utility model.Based on the embodiments of the present invention, those skilled in the art exist Every other embodiment obtained under the premise of creative work is not made, is fallen within the protection scope of the utility model.

It is in the description of the present invention, it should be noted that term " center ", "upper", "lower", "left", "right", " perpendicular Directly ", the orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings, and is only For ease of description the utility model and simplify description, rather than the device or element of indication or suggestion meaning must have it is specific Orientation, be constructed and operated in a specific orientation, therefore should not be understood as limiting the present invention.In addition, term " the One ", " second ", " third " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance.

In the description of the present invention, it should also be noted that, unless otherwise clearly defined and limited, term " is pacified Dress ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally Connection；It can be mechanical connection, be also possible to be electrically connected；Can be directly connected, can also indirectly connected through an intermediary, It can be the connection inside two elements.For the ordinary skill in the art, above-mentioned art can be understood with concrete condition The concrete meaning of language in the present invention.

The utility model is further described in detail below through specific implementation examples and in conjunction with the accompanying drawings.

Embodiment

The present embodiment provides a kind of protective devices of the wind speed round of wind power generating set detection, including wind wheel and variable pitch peace Full chain circuit (6), further includes obliquity sensor (3) and safety guard；The wind wheel includes hub body (1) and blade (2), The central shaft hole position of the hub body is provided with obliquity sensor (3)；The safety guard include controller (5) with after The input terminal of electric appliance (4), the controller (5) is electrically connected with obliquity sensor (3), the output end of the controller (5) with after Electric appliance (4) electrical connection, the normally-closed contact of the relay (4) and the node in variable pitch theft-resistant link chain circuit (6) electrically connect.Inclination angle sensing The speed signal value that device (3) measures is linked into controller, as real-time wind speed round value；Electricity is succeeded in the output end of controller Device, and the normally-closed contact of relay is connected in series in the theft-resistant link chain circuit of pitch-controlled system, one as unit safety chain circuit Divide circuit；When tacho signal value, which is greater than, allows setting value, it is determined as that wind speed round transfinites, the normally-closed contact of relay K disconnects, Then pitch-controlled system executes emergency stopping procedures.Once one of node action will cause whole circuit to power off, unit is at once That is emergency shutdown, executing agency's power loss, unit moment off-grid, and master control system and pitch-controlled system is made to be in blocking, thus Guarantee the safety of unit to the maximum extent.If malfunctioning node cannot restore, the normal operation operation of entire unit is not It is able to achieve.Meanwhile theft-resistant link chain is also last pipe protection of entire unit, it is in after the software protection of unit；Work as wind-force When hypervelocity failure occurs for generating set, the wind speed round overspeed monitoring appliance in theft-resistant link chain circuit is since failure and other reasons are without decision When opening theft-resistant link chain circuit, Safety Redundancy protective effect is played in the monitoring that can exceed the speed limit to wind speed round, with to avoid unit due to super Fast failure, the damage main component that may cause even occur the significant damage sexual behavior of driving etc. therefore occur, reduce unnecessary Economic loss；Wind-driven generator group wind-wheel speed detector provided by the present application, the wind wheel suitable for unit safety chain circuit Over speed of rotation monitoring device breaks down, under the situation in theft-resistant link chain circuit can not be disconnected when wind wheel hypervelocity failure occurs, to Guarantee the safety guard monitored that can exceed the speed limit to wind speed round.As the safeguard protection redundant apparatus of Wind turbines, to prevent The only generation of wind speed round hypervelocity failure.The obliquity sensor is single-shaft inclination angle sensor, and in an internal system, speed is It is unable to measure, but its acceleration can be measured.If initial velocity it is known that linear velocity can be gone out by integral calculation, into And straight-line displacement can be calculated.

Specifically, the safety guard further includes warning device, the warning device includes connecting with control device Buzzer or LED light, warning device issues alarm signal, the normally-closed contact of relay after the normally-closed contact of relay disconnects Warning device issues alarm signal after disconnection, and alarm signal can issue buzzing while disconnecting pitch-controlled system theft-resistant link chain circuit Or LED light flashing alarm.

As shown in Fig. 2, being measuring signal schematic diagram, because obliquity sensor 3 will receive wind wheel rotation during rotation The centrifugal force of generation and the gravity for being horizontally mounted generation, obliquity sensor 3 and installation horizontal plane are a certain included angle β 1, make The horizontal X axis of 3 direction of rotation of obliquity sensor is rotated around trunnion axis L.

The above is only the preferred embodiment of the utility model, it should be understood that the utility model is not limited to herein Disclosed form, should not be regarded as an exclusion of other examples, and can be used for other combinations, modifications, and environments, and Can be in contemplated scope described herein, modifications can be made through the above teachings or related fields of technology or knowledge.And this field The modifications and changes that personnel are carried out do not depart from the spirit and scope of the utility model, then all should be in right appended by the utility model It is required that protection scope in.

Claims (4)

1. the protective device that a kind of wind speed round of wind power generating set detects, including wind wheel and variable pitch theft-resistant link chain circuit (6), It is characterized in that, further includes obliquity sensor (3) and safety guard；

The wind wheel includes hub body (1) and blade (2), and the central shaft hole position of the hub body is provided with obliquity sensor (3)；

The safety guard includes controller (5) and relay (4), and the input terminal of the controller (5) and inclination angle sense Device (3) electrical connection, the output end of the controller (5) is electrically connected with relay (4), the normally-closed contact of the relay (4) and The node in variable pitch theft-resistant link chain circuit (6) electrically connects.

2. the protective device that the wind speed round of wind power generating set according to claim 1 detects, which is characterized in that described Safety guard further includes warning device.

3. the protective device that the wind speed round of wind power generating set according to claim 2 detects, which is characterized in that described Warning device includes the buzzer connecting with control device or LED light, and warning device is sent out after the normally-closed contact of relay disconnects Alarm signal out.

4. the protective device that the wind speed round of wind power generating set according to claim 1 detects, which is characterized in that described

Obliquity sensor (3) is single-shaft inclination angle sensor.