A control method and system for efficient uncabling of a wind turbine generator system

Abstract

The application discloses a kind of wind generating set high-efficiency cable release control method and system, including wind strategy, machine self-checking strategy, small wind condition strategy, high wind condition strategy and safety protection strategy.The present application is based on existing unit sensing information, and carries out information mining, preknows and judges in advance, confirms subsequent unit operating state, so as to judge subsequent unit cable twisting condition, and then makes the cable release of unit more intelligent and efficient, fully and effectively utilizes high wind window period to continue power generation, greatly improves the utilization period of unit high wind speed section, fully utilizes the process of unit machine yawing wind, and simultaneously releases cable, to ensure that cable is in the best state when entering grid-connected state;Fully utilize wind and small wind condition, and reasonably release cable action;Fully utilize high wind window period, and adopt efficient yaw cable release operation strategy based on multiple power generation principle.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of wind turbine group uncabling control, and particularly to a wind turbine group efficient uncabling control method, system, storage medium and computing device. BACKGROUND

[0002] With the large-scale and price parity of wind turbine groups, the yaw of large groups is generally slow, and the reserved cable twisting section is not too abundant due to cost pressure, so the demand for efficient uncabling is increasing. A good uncabling strategy can fully and effectively utilize the large wind window period for continuous power generation, greatly improving the utilization period of the high wind speed section of the group.

[0003] The current mainstream technology route is mainly designed from the perspective of protection, that is, after triggering a certain protection value, the uncabling mode is adopted to operate the group uncabling. This method often lags behind in uncabling or appears some invalid yaw, and cannot achieve high-precision and efficient uncabling operation. Especially with the large-scale of the group, the yaw speed is generally slow, and the cable reservation is no longer as abundant as before, so the demand for efficient uncabling is increasing, and the power generation window is fully and effectively utilized to improve the overall power generation of the group.

[0004] There is no patent literature related to efficient uncabling. The existing patent literature mainly considers the device implementation of automatic uncabling, the safety and effective protection of the control aspect, or the relatively simple uncabling logic. There is no control strategy to fully utilize the existing group sensor information, conduct deep information mining, and improve the more efficient uncabling control method of the group through precise control strategy. SUMMARY

[0005] The first object of the present application is to overcome the shortcomings and deficiencies of the prior art, and to provide a wind turbine group efficient uncabling control method based on the existing group sensor information and information mining. The operation of the group is predicted and judged in advance, and the subsequent group operation state is confirmed, so as to judge the subsequent group cable twisting condition, and then make the uncabling of the group more intelligent and efficient, fully and effectively utilize the large wind window period for continuous power generation, and greatly improve the utilization period of the high wind speed section of the group.

[0006] The second object of the present application is to provide a wind turbine group efficient uncabling control system.

[0007] The third object of the present application is to provide a storage medium.

[0008] The fourth object of the present application is to provide a computing device.

[0009] The first object of the application is achieved by the following technical solution: a control method for efficient uncabling of a wind turbine, the following operations are performed:

[0010] a) wind waiting strategy

[0011] a1) when uncabling is performed under light wind conditions, if a wind waiting condition is encountered, uncabling is preferentially completed, and after uncabling is completed, the wind waiting state is entered again to wait for the next unit start operation;

[0012] a2) when the wind waiting state, i.e., the unit is not yawed, lasts more than T0, and the twist cable angle exceeds A0, the uncabling action is started, wherein A0 and T0 are values greater than 0;

[0013] b) start-up self-check strategy: when the unit enters the start-up state after long wind waiting, twist cable self-check control is performed, so that efficient start-up is achieved while the twist cable angle is in an optimal initial state after start-up;

[0014] c) light wind condition strategy: when the unit is running under light wind conditions, uncabling is considered to be performed as early as possible to ensure that more uncabling is performed and timely grid-connected power generation is ensured;

[0015] d) heavy wind condition strategy: when the unit is running under heavy wind conditions, uncabling is considered to be performed as little as possible to ensure that less uncabling is performed and more power generation is ensured;

[0016] e) safety protection strategy: a large angle A4 is added to the limit of the twist cable angle for protection to prevent excessive twist cable, wherein A4 is a value greater than 0.

[0017] Further, the specific conditions of the start-up self-check strategy are as follows:

[0018] b1) when the twist cable angle is greater than A1, and the wind direction is greater than N0, the unit is yawed according to the uncabling direction and faces the wind, which is counterclockwise yawing, to prevent the twist cable angle from being too large when facing the wind normally, and the unit is easily triggered to trigger the uncabling limit during grid-connected operation after start-up, wherein A1 is a value greater than 0, and 100°

[0019] b2) when the twist cable angle is less than -A1, and the wind direction is less than -N0, the unit is yawed according to the uncabling direction and faces the wind, which is clockwise yawing, to prevent the twist cable angle from being too large when facing the wind normally, and the unit is easily triggered to trigger the uncabling limit during grid-connected operation after start-up;

[0020] b3) in other cases except the above two cases, the unit faces the wind according to normal yawing.

[0021] Further, the specific conditions of the light wind condition strategy are as follows:

[0022] c1) when the twist cable angle + the wind direction angle + K0 is greater than A2, the cable is untwisted, at this time the twist cable angle, the wind direction angle, K0 and A2 are all greater than 0;

[0023] c2) when the twist cable angle + the wind direction angle - K0 is less than -A2, the cable is untwisted, at this time the twist cable angle and the wind direction angle are both less than 0;

[0024] c3) in other cases except the above two cases, the unit is normally operated;

[0025] In the process of untwisting the cable, it is considered that the wind is started to be faced when the untwisting is to the twist cable angle ± B1, so as to ensure that the untwisting is more and the power generation is timely connected to the grid, wherein B1 is 180 degrees.

[0026] Further, the specific case of the strong wind working condition strategy is as follows:

[0027] d1) when the twist cable angle + the wind direction angle + K0 is greater than A3, the cable is untwisted, at this time the twist cable angle, the wind direction angle, K0 and A3 are all greater than 0;

[0028] d2) when the twist cable angle + the wind direction angle - K0 is less than -A3, the cable is untwisted, at this time the twist cable angle and the wind direction angle are both less than 0;

[0029] d3) in other cases except the above two cases, the unit is normally operated;

[0030] In the process of untwisting the cable, it is considered that the wind is started to be faced when the untwisting is to the twist cable angle ± B1, so as to ensure that the untwisting is more and the power generation is timely connected to the grid, wherein B1 is 180 degrees.

[0031] Further, the small wind working condition strategy increases the pre-judgment of the wind speed and the wind direction, so as to more accurately determine whether to preferentially untwist the cable or to preferentially generate power; wherein the pre-judgment is as follows:

[0032] It is predicted that the small wind is continuous, the cable is untwisted more preferentially, and the twist cable angle is reduced;

[0033] It is predicted that the wind speed is larger, the cable is untwisted in advance, and the power loss is reduced;

[0034] It is predicted that the wind speed is smaller, the untwisting time is reduced, and the power generation is preserved;

[0035] It is predicted that the strong wind is continuous, the cable is untwisted less, and the power generation is preserved.

[0036] Further, the strong wind working condition strategy increases the pre-judgment of the wind speed and the wind direction, so as to more accurately determine whether to preferentially untwist the cable or to preferentially generate power; wherein the pre-judgment is as follows:

[0037] It is predicted that the small wind is continuous, the cable is untwisted more preferentially, and the twist cable angle is reduced;

[0038] It is predicted that the wind speed is larger, the cable is untwisted in advance, and the power loss is reduced;

[0039] Predicting the wind speed to be small, reducing the uncabling time, and ensuring power generation;

[0040] Predicting a sustained gale, uncabling less, and ensuring power generation.

[0041] The second object of the application is achieved by the following technical solution: an efficient uncabling control system of a wind turbine generator set, used to realize the efficient uncabling control method of the wind turbine generator set, comprising:

[0042] A wind waiting strategy module, when uncabling under a small wind condition, if a wind waiting condition is encountered, the uncabling is preferentially completed, and after the uncabling is completed, the wind waiting shutdown is entered again to wait for the next unit start operation; in addition, when the unit is not yawing in the wind waiting state, and the twist cable angle exceeds A0 for more than T0, the uncabling action is started, wherein A0 and T0 are values greater than 0;

[0043] A unit self-checking strategy module, when the unit enters a unit start state after a long wind waiting, the twist cable self-checking control is performed, so that the unit starts efficiently, and the twist cable angle is in an optimal initial state after the unit starts;

[0044] A small wind condition strategy module, when the unit runs under a small wind condition, the uncabling is as early as possible to ensure that the uncabling is more and the power generation is timely after the wind is connected to the grid;

[0045] A gale condition strategy module, when the unit runs under a gale condition, the uncabling is as less as possible to ensure that the uncabling is less and the power generation is more;

[0046] A safety protection strategy module, for increasing a large angle A4 to the limit of the twist cable angle for protection, to prevent the twist cable from being excessively twisted, wherein A4 is a value greater than 0.

[0047] The third object of the application is achieved by the following technical solution: a storage medium storing a program, the program being executed by a processor to realize the efficient uncabling control method of the wind turbine generator set.

[0048] The fourth object of the application is achieved by the following technical solution: a computing device comprising a processor and a memory for storing a program executable by the processor, the processor executing the program stored in the memory to realize the efficient uncabling control method of the wind turbine generator set.

[0049] Compared with the prior art, the application has the following advantages and beneficial effects:

[0050] The present application is based on the existing unit sensing information, and carries out information mining, predicts and judges in advance the unit operation, confirms the subsequent unit operation state, thereby judges the subsequent unit cable twisting condition, and further makes the cable release of the unit more intelligent and efficient, fully and effectively utilizes the high wind window period to continue power generation, and greatly improves the utilization period of the unit in the high wind speed section. Therefore, the present application can more efficiently achieve the following purposes of cable release:

[0051] 1. Solve the invalid yawing caused by triggering the limit angle;

[0052] 2. Real-time tracking of the optimal yawing cable release route, so as to timely perform yawing cable release; early identification, early prediction, and window period occupation for fault handling;

[0053] 3. Fully utilize the process of unit starting yawing against the wind to simultaneously release the cable, and ensure that the cable is in the best state when entering the grid-connected state;

[0054] 4. According to different reserved cables, a more stable and efficient yawing cable release strategy is adopted;

[0055] 5. Fully utilize the wind waiting and small wind conditions to perform reasonable cable action;

[0056] 6. Fully utilize the high wind window period, and adopt an efficient yawing cable release operation strategy based on the principle of multiple power generation. BRIEF DESCRIPTION OF DRAWINGS

[0057] Figure 1 is the overall framework diagram of the method of the present application.

[0058] Figure 2 is the self-checking strategy flowchart of the unit.

[0059] Figure 3 is the cable release flowchart of the small wind condition.

[0060] Figure 4 is the cable release flowchart of the high wind condition.

[0061] Figure 5 is the cable release prediction block diagram.

[0062] Figure 6 is the logic block diagram of the system of the present application. DETAILED DESCRIPTION

[0063] The present application will be further described in detail below in combination with embodiments and drawings, but the embodiments of the present application are not limited thereto.

[0064] Example 1

[0065] This embodiment discloses a control method for efficient cable release of a wind turbine generator set, as shown in Figure 1 , and the specific scheme is as follows:

[0066] a) Wind waiting strategy

[0067] a1) When the cable is untied in a small wind condition, if the wind waiting condition is encountered, the untie is preferentially completed, and after the untie is completed, the next unit start operation is entered into the wind waiting stop;

[0068] a2) When the wind waiting state (i.e., the unit is not yawed) lasts more than T0, and the cable twisting angle exceeds A0, the untie action is started, wherein A0 and T0 are values greater than 0.

[0069] b) Start-up self-check strategy

[0070] When the unit enters the start-up state after long wind waiting, the cable twisting self-check control is performed, as shown in Figure 2 , so that the efficient start-up is ensured, and at the same time, the cable twisting angle after the start-up is in an optimal initial state, and the specific strategy is as follows:

[0071] b1) When the cable twisting angle is greater than A1, and the wind direction is greater than N0, the unit is yawed according to the untie direction and faces the wind (counterclockwise yawing), to prevent the normal wind facing cable twisting angle from being too large, and the unit after start-up operation is easy to trigger the untie limit value in the grid-connected operation process, wherein A1 is a value greater than 0, and 100°<N0<180°;

[0072] b2) When the cable twisting angle is less than -A1, and the wind direction is less than -N0, the unit is yawed according to the untie direction and faces the wind (clockwise yawing), to prevent the normal wind facing cable twisting angle from being too large, and the unit after start-up operation is easy to trigger the untie limit value in the grid-connected operation process;

[0073] b3) In other cases except the above two cases, the unit is normally yawed to face the wind.

[0074] c) Small wind condition strategy: When the unit is running in a small wind condition, the untie is considered to be performed as early as possible, as shown in Figure 3 , and the specific logic is as follows:

[0075] c1) When the cable twisting angle + wind direction angle + K0 is greater than A2, the untie is performed, wherein the cable twisting angle, the wind direction angle, K0, and A2 are values greater than 0;

[0076] c2) When the cable twisting angle + wind direction angle - K0 is less than -A2, the untie is performed, wherein the cable twisting angle and the wind direction angle are values less than 0;

[0077] c3) In other cases except the above two cases, the unit is normally running;

[0078] In the untie process, the wind facing is considered to be started when the untie is performed to the cable twisting angle ±B1, to ensure that the untie is performed and the wind facing is performed in time for grid-connected power generation, wherein B1 is 180 degrees.

[0079] d) Large wind condition strategy: in the large wind condition, the unit is running, and the untying of the cable is considered as little as possible, such as Figure 4 As shown in the specific logic as follows:

[0080] d1) when the twist cable angle + wind direction angle + K0 is greater than A3, untying the cable is performed, at this time, the twist cable angle, wind direction angle, K0, and A3 are all values greater than 0;

[0081] d2) when the twist cable angle + wind direction angle - K0 is less than -A3, untying the cable is performed, at this time, the twist cable angle and wind direction angle are both values less than 0;

[0082] d3) in other cases except the above two cases, the unit is normally running;

[0083] In the untying process, it is considered that the wind is started after the twist cable angle is reduced by B2 when untying, to ensure that the cable is untied as little as possible and more power is generated, wherein B2 is 270 degrees.

[0084] e) Safety protection strategy: a larger angle A4 is added to the twist cable angle limit for protection to prevent special situations from causing excessive twisting of the cable, wherein A4 is a value greater than 0.

[0085] Preferably, on the basis of the above strategy, especially in the small wind condition strategy and the large wind condition strategy, a pre-judgment of the wind speed and direction is added to more accurately determine whether to preferentially untie the cable or preferentially generate power, such as Figure 5 As shown in the specific logic as follows:

[0086] Predicting continuous small wind, preferentially untie the cable more, and reduce the twist cable angle;

[0087] Predicting that the wind speed is getting larger, untie the cable in advance, and reduce the power loss;

[0088] Predicting that the wind speed is getting smaller, reduce the untying time, and preserve the power generation;

[0089] Predicting continuous large wind, untie the cable less, and preserve the power generation.

[0090] Embodiment 2

[0091] The embodiment discloses a control system for efficient untying of a wind turbine generator set, which is used to implement the control method for efficient untying of the wind turbine generator set in embodiment 1, as shown in the figure, the system comprises the following functional modules: Figure 6

[0092] A waiting wind strategy module is used for untying the cable in a small wind condition, if a waiting wind condition is encountered, the untying of the cable is preferentially completed, and after the untying of the cable is completed, the unit enters a waiting wind shutdown state to wait for the next unit start operation; in addition, when the unit is not yawing in the waiting wind state, the waiting wind state lasts for more than T0, and the twist cable angle is greater than A0, an untying action is started, wherein A0 and T0 are both values greater than 0;

[0093] ​The start-up self-checking strategy module is used for performing a twisted cable self-checking control when the wind turbine generator system enters a start-up state after long-term wind waiting, so that the wind turbine generator system is started up efficiently and the twisted cable angle is in an optimal initial state after start-up.

[0094] The small wind condition strategy module is used for untwisting the cable as early as possible to ensure untwisting the cable and connecting to the grid in time when the wind turbine generator system operates under a small wind condition.

[0095] The large wind condition strategy module is used for untwisting the cable as little as possible to ensure generating more power when the wind turbine generator system operates under a large wind condition.

[0096] The safety protection strategy module is used for adding a large angle A4 to the limit of the twisted cable angle for protection, to prevent over-twisting the cable, wherein A4 is a value greater than 0.

[0097] Embodiment 3

[0098] The embodiment discloses a storage medium, which stores a program, and the program is executed by a processor to realize the control method for efficiently untwisting a cable of a wind turbine generator system.

[0099] The storage medium in the embodiment can be a disk, an optical disk, a computer memory, a read-only memory (ROM), a random access memory (RAM), a U disk, a mobile hard disk, or the like.

[0100] Embodiment 4

[0101] The embodiment discloses a computing device, which comprises a processor and a memory for storing a program executable by the processor, and the processor executes the program stored in the memory to realize the control method for efficiently untwisting a cable of a wind turbine generator system.

[0102] The computing device in the embodiment can be a desktop computer, a notebook computer, a smart phone, a PDA handheld terminal, a tablet computer, a programmable logic controller (PLC), or other terminal devices with a processor function.

[0103] The above embodiments are preferred embodiments of the present application, but the embodiments of the present application are not limited to the above embodiments, and any changes, modifications, substitutions, combinations, simplifications made without departing from the spirit and principles of the present application should be equivalent replacement modes, and all are included in the protection scope of the present application.

Claims

1. A method for controlling efficient unwinding of a wind turbine generator set, characterized in that: Do the following: a) Waiting for the wind strategy a1) When unwinding in light wind conditions, if the unit is waiting for wind, unwinding should be completed first, and then the unit will enter the waiting for wind shutdown mode and wait for the next unit start-up; a2) When the wind-waiting state is in place, i.e. the unit is not yawed and the situation lasts longer than T0, and the twisted cable angle exceeds A0, the unwinding action is initiated, where A0 and T0 are both greater than 0; b) Startup self-check strategy: When the unit enters the startup state after a long period of wind waiting, the cable twisting self-check control is performed to ensure efficient startup and an optimal starting angle of the cable twisting angle after startup; The details of the power-on self-test strategy are as follows: b1) When the twist cable angle is greater than A1 and the wind direction is greater than N0, the unit yaws in the untwisting direction and faces the wind, yaws counterclockwise, to prevent the normal twist cable angle facing the wind from being too large. After the unit is started and running, it is easy to trigger the untwisting limit during the grid-connected operation. Among them, A1 is a value greater than 0, 100°<N0<180°; b2) When the cable twist angle is less than -A1 and the wind direction is less than -N0, the unit yaws in the direction of cable unwinding and faces the wind, yaws clockwise, to prevent the normal cable twist angle facing the wind from being too large. After the unit is started and operated, it is easy to trigger the cable unwinding limit during grid-connected operation; b3) In all other cases except the above two, the normal yaw should be used to face the wind; c) Low wind conditions strategy: When the unit is running under low wind conditions, consider unwinding the cables as early as possible to ensure that more cables are unwound and the unit is connected to the grid in time for power generation; The specific situation of the low wind working condition strategy is as follows: c1) When the twist cable angle + wind direction angle + K0 is greater than A2, the cable is untied. At this time, the twist cable angle, wind direction angle, K0, and A2 are all greater than 0; c2) When the twist cable angle + wind direction angle - K0 is less than -A2, the cable is untied. At this time, the twist cable angle and wind direction angle are both less than 0; c3) In other cases except the above two cases, the unit operates normally; During the unwinding process, consider starting to face the wind when the unwinding reaches the twisting angle within ±B1, to ensure that more cables are unwound and the wind is connected to the grid in time for power generation, where B1 is 180 degrees; The low wind condition strategy adds a pre-judgment of wind speed and direction to more accurately determine whether to prioritize cable unwinding or power generation. The pre-judgment is as follows: If continuous light winds are predicted, give priority to unwinding the cables and reduce the twisting angle; Predicting higher wind speeds, unwinding the cables in advance to reduce power loss; Predicting a decrease in wind speed reduces the time it takes to unwind and ensures power generation; In case of continued strong winds, reduce the number of cables unwound to ensure power generation; d) Strategy for high wind conditions: When the unit is operating under high wind conditions, consider reducing cable unwinding as much as possible to ensure more power generation; The specific situation of the high wind condition strategy is as follows: d1) When the twist cable angle + wind direction angle + K0 is greater than A3, the cable is untied. At this time, the twist cable angle, wind direction angle, K0, and A3 are all greater than 0; d2) When the twist cable angle + wind direction angle - K0 is less than -A3, the cable is untied. At this time, the twist cable angle and wind direction angle are both less than 0; d3) In other cases except the above two cases, the unit operates normally; During the unwinding process, consider reducing the twisting angle by B2 and then facing the wind to ensure less unwinding and more power generation. B2 is 270 degrees. The high wind condition strategy adds a pre-judgment of wind speed and direction to more accurately determine whether to prioritize cable unwinding or power generation. The pre-judgment is as follows: If continuous light winds are predicted, give priority to unwinding the cables and reduce the twisting angle; Predicting higher wind speeds, unwinding the cables in advance to reduce power loss; Predicting a decrease in wind speed reduces the time it takes to unwind and ensures power generation; In case of continued strong winds, reduce the number of cables unwound to ensure power generation; e) Safety protection strategy: A large angle A4 is added to the cable twisting angle limit to prevent excessive cable twisting, where A4 is a value greater than 0.

2. A control system for efficient cable unwinding of a wind turbine generator set, characterized in that: A control method for realizing efficient unwinding of a wind turbine generator set according to claim 1, comprising: The wind-waiting strategy module is used for unwinding in light wind conditions. If the wind-waiting state is encountered, unwinding is completed first, and then the unit enters the wind-waiting shutdown mode and waits for the next unit start-up. In addition, when the unit is in the wind-waiting state, that is, the unit does not yaw for a period of more than T0, and the twisting angle exceeds A0, the unwinding action is started, where A0 and T0 are both greater than 0. The startup self-check strategy module is used to perform cable twisting self-check control when the unit enters the startup state after a long period of wind waiting, so as to achieve efficient startup and keep the cable twisting angle at an optimal starting state after startup; The low-wind operating strategy module is used to untie the cables as early as possible when the unit is running under low-wind conditions, ensuring that more cables are untied and the unit is connected to the wind grid in time for power generation; The high wind condition strategy module is used to minimize cable unwinding when the unit is running under high wind conditions, ensuring more power generation with less cable unwinding; The safety protection strategy module is used to add a large angle A4 to the cable twisting angle limit to prevent excessive cable twisting, where A4 is a value greater than 0.

3. A storage medium storing a program, characterized in that: When the program is executed by a processor, the control method for efficient cable unwinding of a wind turbine generator set according to claim 1 is implemented.

4. A computing device comprising a processor and a memory for storing a program executable by the processor, characterized in that When the processor executes the program stored in the memory, the control method for efficient cable unwinding of a wind turbine generator set according to claim 1 is implemented.

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