A method and system for collecting climate data of photovoltaic power stations for early warning

Abstract

The present invention discloses a method and system for collecting climate data of a photovoltaic power station for early warning, wherein the method includes: monitoring the surrounding climate data and internal climate data of the photovoltaic power station; the surrounding climate data includes: surrounding wind speed, surrounding wind direction and surrounding wind speed maintenance time; the internal climate data includes: internal wind speed, internal wind direction and internal wind speed maintenance time; when it is monitored that there is continuous wind exceeding a first preset wind speed in the surrounding area, and there is no wind exceeding a second preset wind speed in the interior, the tracker is controlled to rotate the photovoltaic panel to the early warning position; wherein the first preset wind speed is the critical wind speed value that the photovoltaic panel can withstand in the early warning position, and the second preset wind speed is the critical wind speed value that the photovoltaic panel can withstand in the normal tracking position. The present invention adjusts the photovoltaic panel to the early warning position of facing the wind and stopping in advance when strong wind occurs, reducing the risk that the photovoltaic panel fails to rotate in time due to the excessively fast wind speed during the rotation adjustment process.

Description

Technical Field

[0001] The present invention relates to the field of climate early warning for photovoltaic power plants, and in particular to a method and system for collecting climate data for early warning in photovoltaic power plants. Background Art

[0002] At present, there are one or more wind sensors inside the photovoltaic power station. When the strong wind blows to the photovoltaic power station, it can be known that the strong wind is coming. The site of a 10MW photovoltaic power station usually covers an area of ​​200,000 square meters. Some 100M-level power stations are several kilometers long and use huge materials. Therefore, when the strong wind is detected, some areas of the site may have reached high wind speeds. In order to reduce this risk, the existing measures are to use the tracker on the photovoltaic panel to turn the photovoltaic panel to the corresponding protection angle at a lower wind speed. However, the probability of low-speed wind is relatively high. Frequently starting the tracker to rotate the photovoltaic panel will cause the tracker to fail to make the photovoltaic panel track the sun normally, thereby affecting the power generation. In addition, measuring the wind speed at a single point cannot accurately represent the wind speed of the entire photovoltaic field. There is a situation where the wind speed in a certain direction around the photovoltaic power station suddenly increases and the photovoltaic panel is not turned to the protection angle. There is a possibility that the strong wind protection measures will fail. Summary of the invention

[0003] In order to solve the technical problem that the photovoltaic panels need to be adjusted to a protection angle before strong winds come, resulting in frequent rotation of the photovoltaic panels even under low wind speeds and difficulty in tracking the sun normally, the present invention provides a method and system for collecting climate data for early warning in photovoltaic power stations.

[0004] Specifically, the technical solution of the present invention is as follows:

[0005] In a first aspect, the present invention provides a method for collecting climate data of a photovoltaic power station for early warning, comprising:

[0006] Monitoring the surrounding climate data of the photovoltaic power station and the internal climate data of the photovoltaic power station; the surrounding climate data includes: surrounding wind speed, surrounding wind direction and surrounding wind speed maintenance time; the internal climate data includes: internal wind speed, internal wind direction and internal wind speed maintenance time;

[0007] When it is monitored that the surrounding wind speed is greater than the first preset wind speed, the surrounding wind speed is maintained for a time greater than a preset time, and the internal wind speed is monitored to be less than a second preset wind speed, a pre-rotation control signal is sent to the tracker; wherein the first preset wind speed is a critical wind speed value that the photovoltaic panel can withstand in the warning position, and the second preset wind speed is a critical wind speed value that the photovoltaic panel can withstand in the normal tracking position;

[0008] According to the pre-rotation control signal, the photovoltaic panel is rotated to the warning position; the warning position is between the normal tracking position and the high wind protection position.

[0009] This embodiment analyzes and determines that there are strong winds around the photovoltaic power station and low wind speed inside the power station based on the monitored climate information around and inside the photovoltaic power station. This enables the photovoltaic panels to rotate to a warning angle between the normal tracking angle and the strong wind protection angle before the strong wind reaches the photovoltaic power station. This avoids the situation where, when the wind speed is fast, the photovoltaic panels do not have time to rotate to the strong wind protection position based only on the climate information collected inside the photovoltaic power station.

[0010] In some implementations of the method for collecting the climate of a photovoltaic power station for early warning, after monitoring the surrounding climate data of the photovoltaic power station and the internal climate data of the photovoltaic power station, the method further includes:

[0011] When it is monitored that the surrounding wind speed is less than the second preset wind speed, and it is monitored that the internal wind speed is greater than the third preset wind speed, and the internal wind speed is maintained for longer than the preset time, a pre-rotation control signal is sent to the tracker to rotate the photovoltaic panel to the warning position, and the third preset wind speed is the second preset wind speed minus a preset safety value.

[0012] This implementation provides another situation where there is strong wind inside the power station and low wind speed outside, and the photovoltaic panel also needs to be rotated to the warning position.

[0013] In some implementations of the method for collecting climate data for early warning in a photovoltaic power station, the sending of a pre-rotation control signal to the tracker further includes:

[0014] The surrounding wind arrival time is calculated based on the surrounding wind speed and the distance from the monitoring point of the surrounding climate data to the photovoltaic panel;

[0015] Setting a peripheral rotation start time according to the peripheral wind arrival time and the rotation speed of the photovoltaic panel;

[0016] The pre-rotation control signal is sent to the tracker according to the peripheral rotation start time.

[0017] In the case of strong winds in the surroundings, this embodiment sets the pre-rotation peripheral rotation start time according to the wind arrival time and the photovoltaic panel rotation speed, thereby improving the reliability of the system.

[0018] In some implementations of the method for collecting climate information of a photovoltaic power station for early warning, after rotating the photovoltaic panel to the early warning position according to the pre-rotation control signal, the method further includes:

[0019] When it continues to be monitored that both the surrounding wind speed and the internal wind speed are less than the second preset wind speed, a normal tracking control signal is sent to the tracker, wherein the normal tracking control signal rotates the photovoltaic panel from the warning position to the normal tracking position;

[0020] When it is continuously monitored that the internal wind speed is greater than the first preset wind speed, a high wind protection control signal is sent to the tracker, and the high wind protection control signal rotates the photovoltaic panel from the warning position to the high wind protection position.

[0021] This embodiment performs subsequent angle adjustments of the photovoltaic panels by continuing to monitor the surrounding and internal wind speeds.

[0022] Some implementation methods of collecting photovoltaic power station climate information for early warning include:

[0023] Counting and analyzing the surrounding wind direction and the internal wind direction within a preset wind direction collection time to obtain wind direction probabilities of different wind directions;

[0024] According to the wind direction probabilities of the different wind directions, different numbers of monitoring points are set in different directions around the photovoltaic power station.

[0025] This embodiment can adjust the number of monitoring points according to the long-term wind direction of the photovoltaic power station through long-term monitoring of the wind direction, so as to efficiently utilize each monitoring point to monitor the real-time climate.

[0026] In a second aspect, the present invention provides a system for collecting climate data of a photovoltaic power station for early warning, comprising:

[0027] The sentinel wind sensing device is connected to the control device and is set at a monitoring point at a preset distance from the surrounding of the photovoltaic power station, and is used to monitor the surrounding climate data and send the surrounding climate data to the control device; the surrounding climate data includes: surrounding wind speed, surrounding wind direction, and surrounding wind speed maintenance time;

[0028] A main wind sensing device, connected to the control device, disposed inside the photovoltaic power station, for monitoring internal climate data and sending the internal climate data to the control device; the internal climate data includes: internal wind speed, internal wind direction, and the internal wind speed maintenance time;

[0029] The control device is connected to the tracker and is used to send a pre-rotation control signal to the tracker when it is monitored that the surrounding wind speed is greater than the first preset wind speed, the surrounding wind speed is maintained for a time greater than a preset time, and the internal wind speed is monitored to be less than a second preset wind speed;

[0030] The tracker is used to rotate the photovoltaic panel to a warning position according to the received pre-rotation control signal; the warning position is where the photovoltaic panel is between the normal tracking position and the high wind protection position.

[0031] In some implementations of the system for collecting climate information from photovoltaic power plants for early warning, the sentinel wind sensing device or the main wind sensing device includes an antenna installed on the upper part of the bracket, a wind sensing device installed side by side with the antenna on the upper part of the bracket, a communication box installed under the bracket, and a base for fixing and supporting the bracket and the communication box.

[0032] In some implementations of the system for collecting weather information of a photovoltaic power station for early warning, the main wind sensing device may be a wind sensing device disposed in each subarray in the photovoltaic power station.

[0033] In some implementation methods of the system for collecting early warning of the climate of photovoltaic power plants,

[0034] The control device is also used to send a pre-rotation control signal to the tracker when it is monitored that the surrounding wind speed is less than the second preset wind speed, but the internal wind speed is monitored to be greater than a third preset wind speed, and the internal wind speed is maintained for a time greater than the preset time. The third preset wind speed is the second preset wind speed minus a preset safety value.

[0035] In some implementation methods of the system for collecting early warning of the climate of photovoltaic power plants,

[0036] The control device further includes a computing unit, which is further used to calculate the internal wind arrival time according to the internal wind speed and the distance from the main wind sensing device to the photovoltaic panel;

[0037] The control device is further used to set the internal rotation start time according to the internal wind arrival time and the rotation speed of the photovoltaic panel; and send the pre-rotation control signal to the tracker according to the internal rotation start time.

[0038] In some implementation methods of the system for collecting early warning of the climate of photovoltaic power plants,

[0039] The control device is further configured to send a normal tracking control signal to the tracker when it continues to monitor that both the surrounding wind speed and the internal wind speed are less than the second preset wind speed, wherein the normal tracking control signal rotates the photovoltaic panel from the warning position to the normal tracking position;

[0040] When it is continuously monitored that the internal wind speed is greater than the first preset wind speed, a high wind protection control signal is sent to the tracker, and the high wind protection control signal rotates the photovoltaic panel from the warning position to the high wind protection position.

[0041] Compared with the prior art, the present invention has at least one of the following beneficial effects:

[0042] 1. The present invention analyzes and determines that there is a strong wind around the photovoltaic power station and a low wind speed inside the power station based on the monitored climate information around the photovoltaic power station and the internal climate information. The photovoltaic panel can be rotated to a warning angle between the normal tracking angle and the strong wind protection position angle in advance before the strong wind reaches the photovoltaic power station, thereby avoiding the situation where the photovoltaic panel is only collected through the climate information inside the photovoltaic power station. In the case of a fast wind speed, the photovoltaic panel does not have time to rotate directly from the normal tracking position to the strong wind protection position.

[0043] 2. The present invention will also rotate to the warning position when strong winds are detected inside and low wind speeds are detected outside. In the case of sentinel monitoring, the value of the third preset wind speed can be set to a larger value than the conventional third preset wind speed without sentinel monitoring, thereby avoiding the wind speed frequently exceeding the value of the third preset wind speed, resulting in frequent rotation of the photovoltaic panel and the inability to track the sunlight normally. However, in order to protect the photovoltaic panel, this value must be smaller than the second preset wind speed.

[0044] 3. The present invention sets a corresponding pre-rotation start time according to the monitored time when the strong wind reaches the photovoltaic panel and the rotation speed of the photovoltaic panel, thereby improving system reliability.

[0045] 4. After adjusting the photovoltaic panel to the warning angle, the present invention continuously monitors the internal climate data. When strong wind is detected inside the power station, the photovoltaic panel is rotated to the strong wind protection angle; when the wind speed inside and outside the photovoltaic power station is monitored to be less than the second wind speed and no strong wind occurs, the photovoltaic panel is rotated to the normal tracking position.

[0046] 5. The present invention sets more monitoring points in the direction where the wind direction has a greater impact on the photovoltaic power station, and sets fewer monitoring points in the direction where the wind direction has a smaller impact, thereby improving the utilization rate of the monitoring points and reducing the construction cost of the photovoltaic power station. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] The preferred implementation modes will be described below in a clear and understandable manner with reference to the accompanying drawings to further illustrate the above-mentioned characteristics, technical features, advantages and implementation methods of the present invention.

[0048] Figure 1 It is a flow chart of an embodiment of a method for collecting climate data of a photovoltaic power station for early warning according to the present invention;

[0049] Figure 2 It is a flow chart of an embodiment of a method for collecting climate data of a photovoltaic power station for early warning according to the present invention;

[0050] Figure 3It is a system block diagram of an embodiment of a system for collecting climate data of a photovoltaic power station for early warning according to the present invention;

[0051] Figure 4 It is a description drawing of an embodiment of a system for collecting climate data of a photovoltaic power station for early warning according to the present invention;

[0052] Figure 5 It is a description drawing of an embodiment of a system for collecting climate data of a photovoltaic power station for early warning according to the present invention.

[0053] Description of Figure Numbers:

[0054] 10--main wind sensing device; 20--sentinel wind sensing device; 30--control device; 31--calculation unit; 40--tracker. DETAILED DESCRIPTION

[0055] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0056] In order to simplify the drawings, only the parts related to the invention are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically drawn or marked. In this article, "one" not only means "only one", but also means "more than one".

[0057] It should be further understood that the term “and / or” used in the specification and appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0058] In this document, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0059] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0060] In one embodiment, the reference specification Figure 1 The present invention provides a method for collecting climate data of a photovoltaic power station for early warning, comprising:

[0061] In step S110, the surrounding climate data of the photovoltaic power station and the internal climate data of the photovoltaic power station are monitored; the surrounding climate data include: surrounding wind speed, surrounding wind direction and surrounding wind speed maintenance time; the internal climate data include: internal wind speed, internal wind direction and internal wind speed maintenance time;

[0062] In step S120, it is determined whether the monitored surrounding wind speed is greater than the first preset wind speed v1, the surrounding wind speed is maintained for a time greater than a preset time, and the monitored internal wind speed is less than a second preset wind speed v2;

[0063] In step S130, when the judgment condition of step S120 is met, a pre-rotation control signal is sent to the tracker; wherein the first preset wind speed v1 is the critical wind speed value that the photovoltaic panel can withstand at the warning position, and the second preset wind speed v2 is the critical wind speed value that the photovoltaic panel can withstand at the normal tracking position, and the first preset wind speed v1 is greater than the second preset wind speed v2; the wind speed maintenance time is set for judgment in order to screen out whether it is continuous wind, if the wind speed maintenance time exceeds half a minute, it means that the wind is continuous, and the early warning protection will be activated;

[0064] In step S140, the photovoltaic panel is rotated to the warning position according to the pre-rotation control signal; the warning position is a position where the photovoltaic panel is between the normal tracking position and the high wind protection position.

[0065] This embodiment analyzes and determines, based on the monitored climate information around the photovoltaic power station and the internal climate information, that there is strong wind around the power station and the wind speed inside the power station is low. The photovoltaic panel can be rotated to a warning angle between the normal tracking angle and the strong wind protection position angle in advance before the strong wind reaches the photovoltaic power station. This avoids the situation in the prior art where, when the wind speed is fast, the photovoltaic panel is rotated only based on the climate information collected inside the photovoltaic power station, and the photovoltaic panel does not have time to directly rotate from the normal tracking angle to the strong wind protection position or lower the wind speed threshold of the strong wind protection, resulting in low winds frequently triggering the strong wind protection mechanism of the tracker, making it impossible for the photovoltaic panel to track the sun normally, resulting in a loss of generated electricity.

[0066] Based on the previous embodiment, this embodiment provides a method for collecting climate data of a photovoltaic power station for early warning. After the step S110 of monitoring the surrounding climate data of the photovoltaic power station and the internal climate data of the photovoltaic power station, the step further includes:

[0067] When it is monitored that the surrounding wind speed is less than the second preset wind speed v2, and the internal wind speed is monitored to be greater than the third preset wind speed v3, and the internal wind speed is maintained for longer than the preset time, a pre-rotation control signal is sent to the tracker to rotate the photovoltaic panel to the warning position. The third preset wind speed v3 is the second preset wind speed v2 minus the preset safety value N, and the third preset wind speed v3 satisfies the formula v3=v2-N.

[0068] This embodiment provides a situation where there is strong wind inside the power station but low wind speed outside. For example, the gap wind between the tracker arrays may also exceed the first preset wind speed. At this time, the photovoltaic panel also needs to be rotated to the warning position.

[0069] In general, if there is no wind speed monitoring outside the power station, when the wind speed monitored inside the photovoltaic power station is greater than the second preset wind speed v2, the tracker will directly enter the strong wind protection mechanism. At this time, the tracker switches from the normal tracking state to the strong wind protection position angle. There may be a problem of insufficient rotation time for the tracker. At this time, the second preset wind speed v2 is usually a standard with a higher structural design wind speed load, which has higher requirements for structural design, and the material used for structural materials cannot be ignored. However, in the case of external sentinels monitoring the wind speed in this application, the information about the coming of strong winds can be obtained by monitoring the surrounding climate environment, and the tracker can be pre-rotated to the warning position in advance. At this time, the tracker's safe wind speed design standard v2 can be reduced to v3, and the safety value N also has a larger numerical space, such as 5m / s. In this way, due to the monitoring of the external sentinel device, the tracker in the photovoltaic power station has sufficient strong wind protection response time, and the tracker's safe wind speed design standard is reduced by a safety value N. The corresponding tracker structure design and structural materials are also adjusted accordingly, which can significantly reduce the cost of the photovoltaic power station.

[0070] This embodiment provides a method for collecting climate data of a photovoltaic power station for early warning based on the above-mentioned embodiment. The step S130 sends a pre-rotation control signal to the tracker, including:

[0071] The surrounding wind arrival time is calculated based on the surrounding wind speed and the distance from the monitoring point of the surrounding climate data to the photovoltaic panel;

[0072] Setting a peripheral rotation start time according to the peripheral wind arrival time and the rotation speed of the photovoltaic panel;

[0073] The pre-rotation control signal is sent to the tracker according to the peripheral rotation start time.

[0074] This embodiment sets a peripheral rotation start time for pre-rotation. For example, if the surrounding climate data monitoring point monitors a wind speed of 15m / s and the surrounding climate data monitoring point is 9km away from the photovoltaic panel, and strong winds arrive in 10 minutes, the photovoltaic panel rotation speed can meet the requirements of rotating from the normal tracking position to the strong wind protection position within 1 minute. In this way, the photovoltaic panel rotation can be started after 9 minutes, thereby improving the reliability of the method.

[0075] This embodiment is based on the above-mentioned embodiment. Figure 2 , provides a method for collecting the climate of a photovoltaic power station for early warning, wherein the pre-rotation control signal is sent to the tracker, and the step S140 rotates the photovoltaic panel to the early warning position according to the pre-rotation control signal, and further comprises:

[0076] In step S151, it is determined whether the monitored surrounding wind speed and the internal wind speed are both less than the second preset wind speed;

[0077] In step S152, when the condition of step S151 is met, a normal tracking control signal is sent to the tracker, and the normal tracking control signal rotates the photovoltaic panel from the warning position to the normal tracking position;

[0078] In step S153, it is determined whether the monitored internal wind speed is greater than the first preset wind speed;

[0079] In step S154, when the condition of step S153 is met, a strong wind protection control signal is sent to the tracker, and the strong wind protection control signal rotates the photovoltaic panel from the warning position to the strong wind protection position.

[0080] After adjusting the warning position, this embodiment continues to adjust the photovoltaic panel position according to the monitored surrounding climate data and internal climate data to complete the protection of the photovoltaic panel in windy climates and the tracking adjustment under normal conditions.

[0081] Based on the above embodiments, this embodiment provides a method for collecting climate data of a photovoltaic power station for early warning, including:

[0082] Counting and analyzing the surrounding wind direction and the internal wind direction within a preset wind direction collection time to obtain wind direction probabilities of different wind directions;

[0083] According to the wind direction probabilities of the different wind directions, different numbers of monitoring points are set in different directions around the photovoltaic power station. For example, if statistical analysis shows that the photovoltaic power station often has northeasterly winds, more monitoring points are set in the northeast direction, and fewer or no monitoring points are set in locations with less wind.

[0084] In one embodiment, the reference specification Figure 3 And the instruction manual Figure 5 The present invention provides a system for collecting climate data of a photovoltaic power station for early warning, comprising:

[0085] The sentinel wind sensing device 20 is connected to the control device 30 and is set at a monitoring point at a preset distance around the photovoltaic power station. It is used to monitor the surrounding climate data and send the surrounding climate data to the control device 30; the surrounding climate data includes: surrounding wind speed, surrounding wind direction, and surrounding wind speed maintenance time; the preset distance is determined by analyzing the normal wind speed, the system response time and the on-site communication quality of the photovoltaic power station.

[0086] The main wind sensing device 10 is connected to the control device 30 and is disposed inside the photovoltaic power station, and is used to monitor internal climate data and send the internal climate data to the control device 30; the internal climate data includes: internal wind speed, internal wind direction, and the internal wind speed maintenance time;

[0087] The control device 30 is connected to the tracker 40 on the photovoltaic panel, and is used to send a pre-rotation control signal to the tracker 40 when it is monitored that the surrounding wind speed is greater than the first preset wind speed, the surrounding wind speed is maintained for a time greater than a preset time, and the internal wind speed is monitored to be less than a second preset wind speed;

[0088] The tracker 40 is used to rotate the photovoltaic panel to the warning position according to the received pre-rotation control signal; the warning position is between the normal tracking position and the strong wind protection position of the photovoltaic panel, which can be seen in the appendix of the manual for details. Figure 5 The tracker has different protection postures for the photovoltaic panel. The normal tracking position is when the angle between the photovoltaic panel and the horizontal direction is α 1 The warning position is when the angle between the photovoltaic panel and the horizontal direction is α 2 The strong wind protection position is when the angle between the photovoltaic panel and the horizontal direction is α 3 The position of the sentinel wind sensor is not 1 It is the main working condition that determines the use of photovoltaic panel structural materials. In this application, because there is a sentinel wind sensing device, the photovoltaic panel can be rotated before the strong wind comes. 3 As the main working condition that determines the use of photovoltaic panel structural materials, it saves materials and reduces risks.

[0089] In this embodiment, the sentinel wind sensing device 20 is used to monitor the climate around the photovoltaic power station, and the main wind sensing device 10 is used to monitor the climate inside the photovoltaic power station. Compared with the traditional technology, the addition of the sentinel wind sensing device 20 can obtain the information of the wind that will blow to the photovoltaic panel at a high wind speed earlier, giving the photovoltaic panel enough rotation time. Moreover, due to the sufficient rotation time, the wind speed threshold that the photovoltaic panel needs to rotate can be reduced, avoiding the frequent rotation of the photovoltaic panel, resulting in the failure to track the sun normally, resulting in waste of power generation,

[0090] This embodiment is based on the above-mentioned embodiment. Figure 4 , provides a system for collecting photovoltaic power station climate for early warning, including:

[0091] The sentinel wind sensing device 20 or the main wind sensing device 10 includes an antenna installed on the upper part of the bracket, a wind sensing device installed side by side with the antenna on the upper part of the bracket, a communication box installed below the bracket, and a base for fixing and supporting the bracket and the communication box. The main wind sensing device can be a wind sensing device set in each sub-array in the photovoltaic power station.

[0092] The sentinel wind sensing device 20 and the main wind sensing device 10 of this embodiment adopt the same structure. The communication box and the antenna are used to send signals to the control device 30, and the wind sensor is used to monitor the surrounding climate information and internal climate information of the photovoltaic power station.

[0093] This embodiment provides a system for collecting weather data of a photovoltaic power station for early warning based on the above-mentioned embodiment.

[0094] The control device 30 is also used to send a pre-rotation control signal to the tracker 40 when it monitors that the surrounding wind speed is less than the second preset wind speed, and monitors that the internal wind speed is greater than a third preset wind speed, and the internal wind speed is maintained for a time greater than the preset time. The third preset wind speed is the second preset wind speed minus a preset safety value.

[0095] This embodiment provides another situation where there is strong wind inside the power station and low wind speed outside, and the photovoltaic panel also needs to be rotated to the warning position.

[0096] This embodiment provides a system for collecting weather data of a photovoltaic power station for early warning based on the above-mentioned embodiment.

[0097] The control device 30 further includes a computing unit 31, and the computing unit 31 is further used to calculate the internal wind arrival time according to the internal wind speed and the distance from the monitoring point of the internal climate data to the photovoltaic panel;

[0098] The control device 30 is further used to set the internal rotation start time according to the internal wind arrival time and the rotation speed of the photovoltaic panel; and send the pre-rotation control signal to the tracker 40 according to the internal rotation start time.

[0099] This embodiment sets an internal rotation start time for pre-rotation. For example, if the internal climate data monitoring point monitors a wind speed of 15m / s and the surrounding climate data monitoring point is 4.5km away from the photovoltaic panel, strong wind will arrive in 5 minutes, and the rotation speed of the photovoltaic panel can meet the requirement of rotating from the normal tracking position to the strong wind protection position within 1 minute, then the rotation of the photovoltaic panel will be started after 4 minutes. The difference between the internal rotation start time and the aforementioned surrounding rotation start time is the time taken for the wind to travel from the position of the sentinel sensor to the position of the main sensor.

[0100] This embodiment provides a system for collecting weather data of a photovoltaic power station for early warning based on the above-mentioned embodiment.

[0101] The control device 30 is further configured to send a normal tracking control signal to the tracker 40 when the surrounding wind speed and the internal wind speed are both less than the second preset wind speed, wherein the normal tracking control signal rotates the photovoltaic panel from the warning position to the normal tracking position;

[0102] When it is continuously monitored that the internal wind speed is greater than the first preset wind speed, a high wind protection control signal is sent to the tracker 40, and the high wind protection control signal rotates the photovoltaic panel from the warning position to the high wind protection position.

[0103] After adjusting the warning position, this embodiment continues to adjust the photovoltaic panel position according to the monitored surrounding climate data and internal climate data to complete the protection of the photovoltaic panel in windy climates and the angle adjustment of tracking the sun under normal conditions.

[0104] It should be noted that the above embodiments can be freely combined as needed. The above are only preferred embodiments of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A method for collecting climate data of a photovoltaic power station for early warning, characterized in that: include: Monitoring the surrounding climate data of the photovoltaic power station and the internal climate data of the photovoltaic power station; The surrounding climate data includes: surrounding wind speed, surrounding wind direction and surrounding wind speed maintenance time; the internal climate data includes: internal wind speed, internal wind direction and internal wind speed maintenance time; When it is monitored that the surrounding wind speed is greater than a first preset wind speed, the surrounding wind speed is maintained for a time greater than a preset time, and the internal wind speed is monitored to be less than a second preset wind speed, a pre-rotation control signal is sent to the tracker; wherein the first preset wind speed is a critical wind speed value that the photovoltaic panel can withstand in the warning position, and the second preset wind speed is a critical wind speed value that the photovoltaic panel can withstand in the normal tracking position; According to the pre-rotation control signal, the photovoltaic panel is rotated to the warning position; the warning position is between the normal tracking position and the high wind protection position.

2. The method for collecting climate data of a photovoltaic power station for early warning according to claim 1, characterized in that: After monitoring the surrounding climate data of the photovoltaic power station and the internal climate data of the photovoltaic power station, it also includes: When it is monitored that the surrounding wind speed is less than the second preset wind speed, and it is monitored that the internal wind speed is greater than the third preset wind speed, and the internal wind speed is maintained for longer than the preset time, a pre-rotation control signal is sent to the tracker to rotate the photovoltaic panel to the warning position, and the third preset wind speed is the second preset wind speed minus a preset safety value.

3. The method for collecting climate data of a photovoltaic power station for early warning according to claim 1, characterized in that: The sending of the pre-rotation control signal to the tracker further comprises: The surrounding wind arrival time is calculated based on the surrounding wind speed and the distance from the monitoring point of the surrounding climate data to the photovoltaic panel; Setting a peripheral rotation start time according to the peripheral wind arrival time and the rotation speed of the photovoltaic panel; The pre-rotation control signal is sent to the tracker according to the peripheral rotation start time.

4. A method for collecting climate data of a photovoltaic power station for early warning according to any one of claims 1 to 3, characterized in that: After rotating the photovoltaic panel to the warning position according to the pre-rotation control signal, the method further includes: When it continues to be monitored that both the surrounding wind speed and the internal wind speed are less than the second preset wind speed, a normal tracking control signal is sent to the tracker, wherein the normal tracking control signal rotates the photovoltaic panel from the warning position to the normal tracking position; When it is continuously monitored that the internal wind speed is greater than the first preset wind speed, a high wind protection control signal is sent to the tracker, and the high wind protection control signal rotates the photovoltaic panel from the warning position to the high wind protection position.

5. A system for collecting climate data from photovoltaic power plants for early warning, characterized in that: include: A sentinel wind sensing device, connected to the control device, is arranged at a monitoring point at a preset distance from the surrounding of the photovoltaic power station, and is used to monitor surrounding climate data and send the surrounding climate data to the control device; The surrounding climate data include: surrounding wind speed, surrounding wind direction, and surrounding wind speed maintenance time; A main wind sensing device, connected to the control device, disposed inside the photovoltaic power station, for monitoring internal climate data and sending the internal climate data to the control device; the internal climate data includes: internal wind speed, internal wind direction, and the internal wind speed maintenance time; The control device is connected to the tracker and is used to send a pre-rotation control signal to the tracker when it is monitored that the surrounding wind speed is greater than a first preset wind speed, the surrounding wind speed is maintained for a time greater than a preset time, and the internal wind speed is monitored to be less than a second preset wind speed; The tracker is used to rotate the photovoltaic panel to a warning position according to the received pre-rotation control signal; the warning position is between the normal tracking position and the high wind protection position.

6. The system for collecting climate data of a photovoltaic power station for early warning according to claim 5, characterized in that: The sentinel wind sensing device or the main wind sensing device comprises: An antenna installed on the upper part of the bracket, a wind sensing device installed side by side with the antenna on the upper part of the bracket, a communication box installed below the bracket, and a base for fixing and supporting the bracket and the communication box.

7. The system for collecting climate data of a photovoltaic power station for early warning according to claim 5, characterized in that: The main wind sensing device may be a wind sensing device arranged in each subarray in the photovoltaic power station.

8. The system for collecting weather data of a photovoltaic power station for early warning according to claim 5 is characterized in that: The control device is also used to send a pre-rotation control signal to the tracker when it is monitored that the surrounding wind speed is less than the second preset wind speed, but the internal wind speed is monitored to be greater than a third preset wind speed, and the internal wind speed is maintained for a time greater than the preset time. The third preset wind speed is the second preset wind speed minus a preset safety value.

9. The system for collecting climate data of a photovoltaic power station for early warning according to claim 8, characterized in that: The control device further includes a computing unit, which is further used to calculate the internal wind arrival time according to the internal wind speed and the distance from the main wind sensing device to the photovoltaic panel; The control device is further used to set the internal rotation start time according to the internal wind arrival time and the rotation speed of the photovoltaic panel; and send the pre-rotation control signal to the tracker according to the internal rotation start time.

10. A system for collecting climate data of a photovoltaic power station for early warning according to any one of claims 5 to 9, characterized in that: The control device is further configured to send a normal tracking control signal to the tracker when it continues to monitor that both the surrounding wind speed and the internal wind speed are less than the second preset wind speed, wherein the normal tracking control signal rotates the photovoltaic panel from the warning position to the normal tracking position; When it is continuously monitored that the internal wind speed is greater than the first preset wind speed, a high wind protection control signal is sent to the tracker, and the high wind protection control signal rotates the photovoltaic panel from the warning position to the high wind protection position.

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