Safety protection system of wind turbine generator and wind turbine generator

Abstract

The utility model discloses a safety protection system of a wind turbine generator and the wind turbine generator, which comprises a safety relay, a plurality of fault nodes connected in series in a safety chain loop, an emergency stop operation unit and a reset operation unit, the safety relay comprises a first input end connected with a plurality of fault nodes, a second input end connected with an emergency stop operation unit, a third input end connected with a reset operation unit, a first output end connected with a yaw system, a second output end connected with a variable pitch system, and a third output end connected with a converter. And a safety chain loop adopts a double-contact redundancy design. According to the scheme, the double-contact redundancy design is adopted for input signals in the safety chain, the control ends of important mechanism parts possibly causing serious damage to the unit are connected in series to form the loop, and when any contact in the loop breaks down, the safety chain is disconnected, emergency shutdown is caused, and the wind turbine unit is instantly off-grid, the safety of the unit is guaranteed to the maximum extent.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of wind power generation, in particular to a safety protection system of wind turbine generator and wind turbine generator. BACKGROUND

[0002] The wind turbine generator needs a complete and reliable safety chain system independent of the control system to ensure the safety of the unit, maintenance personnel and the safe operation of the mechanical and electrical equipment of the wind farm, and to ensure the safe shutdown of the unit when the control system fails. As a hardware protection measure independent of the controller, the action of the safety chain should be prioritized over the unit control system, so even if the control system is abnormal, it will not affect the normal action of the safety chain. In order to strengthen the safety protection of the unit, it is necessary to focus on important mechanical components that may cause damage to the unit, connect the control end of these components to the safety chain loop, and take appropriate redundant design at some key nodes to improve the safety of the wind turbine generator operation. SUMMARY

[0003] A series of simplified concepts are introduced in the summary part of the utility model, which will be further described in detail in the specific embodiment part. The summary part of the utility model does not mean to try to limit the key features and necessary technical features of the claimed technical solution, nor does it mean to try to determine the protection scope of the claimed technical solution.

[0004] In order to at least partially solve the above problems, the utility model provides a safety protection system of wind turbine generator, including safety relay, multiple fault nodes connected in series in safety chain loop, emergency stop operation unit and reset operation unit, the safety relay includes first input end connected with the multiple fault nodes, second input end connected with the emergency stop operation unit, third input end connected with the reset operation unit, first output end connected with yaw system, second output end connected with variable pitch system and third output end connected with variable flow device, the safety chain loop adopts double contact redundancy design.

[0005] Further, the multiple fault nodes include generator overspeed node, unit over-vibration node, hub low-speed shaft overspeed node, yaw cable twist limit node, main control watchdog fault node, storage relay fault node and variable pitch drive fault node connected in series with each other, and each fault node adopts double contact switch.

[0006] Further, the hub overspeed protection contact is electrically connected with the slip ring encoder.

[0007] Further, the emergency stop operation unit includes a tower base emergency stop button arranged on a tower base control cabinet panel and a nacelle emergency stop button arranged on a nacelle control cabinet panel. Further, the reset operation unit includes a tower base reset button arranged on the tower base control cabinet panel and a nacelle reset button arranged on the nacelle control cabinet panel.

[0008] Further, the reset operation unit comprises a tower base reset button arranged on a tower base control cabinet panel and a nacelle reset button arranged on a nacelle control cabinet panel.

[0009] Further, the tower base emergency stop button and the nacelle emergency stop button are both double-contact switches.

[0010] The utility model also provides a wind turbine, the wind turbine includes above-mentioned safety protection system.

[0011] The scheme adopts double-contact redundant design for the safety chain loop, and the control ends of important mechanism components that can cause serious damage to the unit are connected in series into a loop, when any contact in the loop fails, the safety chain is disconnected, emergency shutdown is caused, the wind turbine is instantaneously disconnected from the grid, so that the safety of the unit is maximally ensured. BRIEF DESCRIPTION OF DRAWINGS

[0012] The following drawings of the utility model are used as a part of the utility model for understanding the utility model. The drawings show the embodiments of the utility model and the description thereof, and are used to explain the device and principle of the utility model. In the drawings,

[0013] Figure 1 It is a structural schematic view of the safety protection system of the utility model embodiment. DETAILED DESCRIPTION

[0014] In the following description, a large number of specific details are given in order to provide a more thorough understanding of the utility model. However, it is obvious for those skilled in the art that the utility model can be implemented without one or more of these details. In other examples, in order to avoid confusion with the utility model, some technical features known in the art are not described.

[0015] In order to thoroughly understand the utility model, detailed structures will be proposed in the following description in order to explain the utility model. Obviously, the implementation of the utility model is not limited to the special details familiar to those skilled in the art. The preferred embodiments of the utility model are described in detail as follows, however, in addition to these detailed descriptions, the utility model can also have other embodiments, and should not be interpreted as being limited to the embodiments proposed here.

[0016] It should be understood that the terminology used herein is intended only to describe particular embodiments and is not intended to limit the scope of the invention. The singular forms “a,” “an,” and “the” are also intended to include the plural forms unless the context clearly indicates otherwise. When the terms “comprising” and / or “including” are used in this specification, they indicate the presence of the stated feature, integral, step, operation, element, and / or component, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or combinations thereof. The terms “upper,” “lower,” “front,” “rear,” “left,” “right,” and similar expressions used in this invention are for illustrative purposes only and are not intended to be limiting.

[0017] The ordinal numbers such as "first" and "second" used in this invention are merely identifiers and have no other meaning, such as a specific order. Furthermore, for example, the term "first component" does not imply the existence of "second component," and the term "second component" does not imply the existence of "first component."

[0018] The specific embodiments of the present invention will be described in more detail below with reference to the accompanying drawings, which show representative embodiments of the present invention and are not intended to limit the present invention.

[0019] This utility model provides a safety protection system for wind turbine generators. For example... Figure 1 As shown, the safety protection system includes a safety relay 1, multiple fault nodes 2 connected in series in the safety chain loop, an emergency stop operation unit 3, and a reset operation unit 4. The safety relay 1 includes a first input terminal connected to the multiple fault nodes 2, a second input terminal connected to the emergency stop operation unit 2, a third input terminal connected to the reset operation unit 3, a first output terminal connected to the yaw system, a second output terminal connected to the pitch system, and a third output terminal connected to the converter. This design employs a dual-contact redundancy design for the input signals in the safety chain, connecting the control terminals of critical components that could cause serious damage to the unit in series into a loop. When any contact in the loop fails, the safety chain breaks, causing an emergency shutdown, and the wind turbine instantly disconnects from the grid, thereby maximizing the safety of the unit.

[0020] According to an embodiment of this utility model, multiple fault nodes 2 include generator overspeed node, unit over-vibration node, hub low-speed shaft overspeed node, yaw cable twist limit node, main control watchdog fault node (to prevent unit main controller failure), storage relay fault node, and pitch drive fault node connected in series. Each fault node uses a double-contact switch. The above contacts can be normally closed switches. If any node malfunctions, the switch will open, breaking the entire safety chain. For example, if the impeller or generator speed exceeds the set normal range due to control failure, the corresponding overspeed emergency stop switch will open, thus breaking the entire safety chain. The impeller speed can be obtained by a slip ring encoder installed at the rear end of the unit's main gearbox. If an abnormal yaw causes the clockwise or counterclockwise cable twist angle to exceed the allowable range, the corresponding cable twist limit switch will open, breaking the entire safety chain to avoid cable damage. Depending on the location of the fault node, all or part of the yaw control circuit, pitch control circuit, and converter control circuit can be disconnected. For example, if the cable twist limit switch is open, the yaw control circuit locks the yaw system and the unit stops yawing; if overspeed or abnormal vibration occurs, the pitch control circuit causes the pitch system to perform a pitch retraction operation.

[0021] Emergency stop unit 3 includes a tower base emergency stop button on the tower base control cabinet panel and a nacelle emergency stop button on the nacelle control cabinet panel. These are operated by personnel in emergency situations. Pressing the emergency stop button disconnects the safety chain, causing the unit to shut down immediately and ensuring safety. Reset unit 4 includes a tower base reset button on the tower base control cabinet panel and a nacelle reset button on the nacelle control cabinet panel. The tower base reset button can include both a tower base emergency stop reset button and a tower base system reset button. After the fault is resolved, personnel can operate the reset button to re-close the safety chain, allowing the unit to resume normal operation.

[0022] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for descriptive purposes only and is not intended to limit the scope of the invention. Terms such as “part” or “component” appearing herein can refer to a single part or a combination of multiple parts. Terms such as “installation” or “installation” appearing herein can refer to one component being directly attached to another component or one component being attached to another component via an intermediary. A feature described in one embodiment herein may be applied, alone or in combination with other features, to another embodiment, unless that feature is not applicable in that other embodiment or is otherwise specified.

[0023] The utility model discloses has been through the above implementation mode and has been explained, but should understand, the above implementation mode is only for the example and the purpose of illustration, and is not intended to limit the utility model to the implementation range described. In addition, those skilled in the art can understand that the utility model is not limited to the above implementation, and more kinds of variations and modifications can be made according to the teaching of the utility model, and the variations and modifications all fall within the scope of the utility model claimed. The protection scope of the utility model is defined by the attached claim and its equivalent range.

Claims

1. A safety protection system for a wind turbine generator set, characterized in that, It includes a safety relay, multiple fault nodes connected in series in the safety chain loop, an emergency stop operation unit, and a reset operation unit. The safety relay includes a first input terminal connected to the multiple fault nodes, a second input terminal connected to the emergency stop operation unit, a third input terminal connected to the reset operation unit, a first output terminal connected to the yaw system, a second output terminal connected to the pitch system, and a third output terminal connected to the converter. The safety chain loop adopts a dual-contact redundancy design.

2. The security protection system according to claim 1, characterized in that, The multiple fault nodes include generator overspeed node, unit over-vibration node, hub low-speed shaft overspeed node, yaw torsion cable limit node, main control watchdog fault node, storage relay fault node, and pitch drive fault node connected in series. Each fault node uses a double-contact switch.

3. The security protection system according to claim 2, characterized in that, The low-speed shaft overspeed node of the hub is electrically connected to the slip ring encoder.

4. The security protection system according to claim 1, characterized in that, The emergency stop operation unit includes a tower base emergency stop button on the tower base control cabinet panel and an engine room emergency stop button on the engine room control cabinet panel.

5. The security protection system according to claim 4, characterized in that, Both the tower base emergency stop button and the cabin emergency stop button are double-contact switches.

6. The security protection system according to any one of claims 1-5, characterized in that, The reset operation unit includes a tower base reset button on the tower base control cabinet panel and a nacelle reset button on the nacelle control cabinet panel.

7. A wind turbine generator set, characterized in that, The wind turbine includes a safety protection system according to any one of claims 1-6.

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