Energy-saving control method and system for box transformer substation of photovoltaic power station

Abstract

The invention discloses a box transformer substation energy-saving control method and system for a photovoltaic power station, and relates to the technical field of photovoltaic power generation, and the method comprises the steps: determining a required energy-saving grade according to the energy data of the photovoltaic power station; selecting an energy-saving mode or an adjusting mode according to the required energy-saving grade; the photovoltaic power station is controlled through the energy-saving mode or the adjusting mode, in the control process, the needed energy-saving grade is obtained according to a preset period, and mode switching is carried out; the energy-saving mode comprises the following steps: associating operation data of the box transformer substation with an energy utilization rate so as to control the operation of the box transformer substation and realize energy conservation; the adjusting mode comprises the step of associating the operation data of the box transformer substation with the power generation efficiency so as to control the operation of the box transformer substation. The adaptability to complex and changeable conditions is guaranteed, and the energy-saving effect is improved. The energy-saving mode well achieves the goal of energy conservation and takes into account the basic requirements of operation, and the adjustment mode well achieves the power requirements of operation and ensures the safe and stable operation of the power station.

Description

Technical Field

[0001] The present application relates to the field of photovoltaic power generation technology, and more specifically, to a box-type transformer energy-saving control method and system for a photovoltaic power station. Background Art

[0002] Energy-saving control of box-type transformers in photovoltaic power plants is achieved by integrating various background technologies. These technologies aim to improve the energy efficiency of photovoltaic systems, optimize energy distribution, and reduce energy consumption.

[0003] In the prior art, photovoltaic power stations cannot provide a method for combining an energy-saving mode with a normal regulation mode to control the energy-saving and control effects of the photovoltaic power station, resulting in problems of resource waste and low work efficiency.

[0004] Therefore, how to improve energy-saving efficiency and control accuracy to ensure the adaptability of photovoltaic power stations to complex working conditions is a technical problem that needs to be solved. Summary of the Invention

[0005] The present invention provides a photovoltaic power station box transformer energy-saving control method to solve the technical problems of low energy-saving efficiency and poor control accuracy in the prior art. The method includes:

[0006] Obtaining photovoltaic power station energy data and determining the required energy saving level based on the photovoltaic power station energy data;

[0007] Select energy-saving mode or regulation mode according to the required energy-saving level;

[0008] The photovoltaic power station is controlled through energy-saving mode or regulation mode. During the control process, the required energy-saving level is obtained according to the preset cycle and the mode is switched;

[0009] Energy saving modes include:

[0010] Acquire PV power station operation data and box-type transformer operation data, and associate the box-type transformer operation data with energy utilization rate to control box-type transformer operation and achieve energy saving;

[0011] Adjustment modes include:

[0012] Acquire the operating data of the photovoltaic power station and the box-type transformer, and associate the box-type transformer operating data with the power generation efficiency to control the box-type transformer operation.

[0013] In some embodiments of the present application, obtaining photovoltaic power station energy data includes:

[0014] Obtain energy utilization over a period of time and construct an energy utilization change curve;

[0015] Divide the energy utilization rate change curve into multiple sub-curves according to its time length, and calculate the slope change of each sub-curve;

[0016] Eliminate the sub-curves whose slope changes exceed the first slope change threshold, and record the sub-curves whose slope changes exceed the second slope change threshold but do not exceed the first slope change threshold as the curve to be analyzed;

[0017] If the difference between the average value of the slope changes of two adjacent sub-curves of the curve to be analyzed and the slope change of the curve to be analyzed does not exceed the preset difference, then the average value is updated as the slope change of the curve to be analyzed;

[0018] If the slope change of the curve to be analyzed after the update does not exceed the second slope change threshold, the curve to be analyzed is retained;

[0019] The retained sub-curves are spliced ​​together, and the eliminated sub-curves are supplemented to obtain the slope change of the overall energy utilization rate change curve;

[0020] The slope change of the overall energy utilization rate change curve is used as the energy data of the photovoltaic power station.

[0021] In some embodiments of the present application, obtaining photovoltaic power station energy data further includes:

[0022] Obtain the equipment efficiency of each device in the photovoltaic power station and determine the equipment efficiency of the photovoltaic power station as a whole;

[0023]

[0024] Among them, P is the overall equipment efficiency of the photovoltaic power station, exp is the exponential function, n is the number of equipment in the photovoltaic power station, α i is the efficiency impact weight corresponding to the i-th device, Q i is the equipment efficiency corresponding to the i-th equipment, m is the number of equipment whose equipment efficiency exceeds the reasonable value, W j is the equipment efficiency of the jth equipment that exceeds the reasonable value, E j is the efficiency threshold of the jth device that exceeds the reasonable value, k1 is the first preset constant;

[0025] The overall equipment efficiency of the photovoltaic power station is used as the energy data of the photovoltaic power station.

[0026] In some embodiments of the present application, determining the required energy saving level based on the photovoltaic power station energy data includes:

[0027]

[0028] Wherein, L is the required energy-saving level, P is the overall equipment efficiency of the photovoltaic power station, β1 is the correction coefficient corresponding to the difference between the slope change and the preset value, k2 is the second preset constant, β2 is the fixed correction coefficient, k3 is the third preset constant, M is the conversion coefficient, and [] is the rounding symbol.

[0029] In some embodiments of the present application, the energy-saving mode or the adjustment mode is selected according to the required energy-saving level, including:

[0030] If the required energy saving level exceeds the preset energy saving level, select the energy saving mode;

[0031] Otherwise, select Regulation mode.

[0032] In some embodiments of the present application, the box-type transformer operation data is associated with the energy utilization rate to control the box-type transformer operation, including:

[0033] Predict the future operation data of the photovoltaic power station in the future based on the operation data of the photovoltaic power station;

[0034] The future operating data of the box-type transformer is determined based on the future operating data of the photovoltaic power station and the preset matching relationship;

[0035] The trend of the box-type transformer data is determined based on the box-type transformer operation data and the box-type transformer future operation data, and the trend of the energy utilization rate is determined based on the box-type transformer data trend, so as to adjust the box-type transformer future operation data.

[0036] In some embodiments of the present application, the box-type transformer operation data is associated with the power generation efficiency to control the box-type transformer operation, including:

[0037] Predict the future operation data of the photovoltaic power station in the future based on the operation data of the photovoltaic power station;

[0038] The future operating data of the box-type transformer is determined based on the future operating data of the photovoltaic power station and the preset matching relationship;

[0039] The trend of the box-type transformer data is determined based on the box-type transformer operation data and the box-type transformer future operation data, and the trend of the power generation efficiency is determined based on the box-type transformer data trend, so as to adjust the box-type transformer future operation data.

[0040] In some embodiments of the present application, during the control process, the required energy saving level is obtained according to a preset period and mode switching is performed, including:

[0041] If the energy-saving mode is in operation and the required energy-saving level obtained according to the preset period does not exceed the preset energy-saving level, the energy-saving mode is switched to the adjustment mode;

[0042] If the system is in the adjustment mode and the required energy-saving level obtained according to the preset period exceeds the preset energy-saving level, the adjustment mode is switched to the energy-saving mode.

[0043] Correspondingly, the present application also provides a box-type transformer energy-saving control system for a photovoltaic power station, the system comprising:

[0044] The first module is used to obtain the energy data of the photovoltaic power station and determine the required energy saving level based on the energy data of the photovoltaic power station;

[0045] The second module is used to select the energy-saving mode or the regulation mode according to the required energy-saving level;

[0046] The third module is used to control the photovoltaic power station through energy-saving mode or regulation mode. During the control process, the required energy-saving level is obtained according to the preset cycle and the mode is switched;

[0047] The second module is used to:

[0048] Energy saving modes include:

[0049] Acquire PV power station operation data and box-type transformer operation data, and associate the box-type transformer operation data with energy utilization rate to control box-type transformer operation and achieve energy saving;

[0050] Adjustment modes include:

[0051] Acquire the operating data of the photovoltaic power station and the box-type transformer, and associate the box-type transformer operating data with the power generation efficiency to control the box-type transformer operation.

[0052] By applying the above technical solutions, the energy data of the photovoltaic power station is obtained, and the required energy-saving level is determined based on the energy data of the photovoltaic power station; the energy-saving mode or the adjustment mode is selected based on the required energy-saving level; the photovoltaic power station is controlled through the energy-saving mode or the adjustment mode, and during the control process, the required energy-saving level is obtained according to the preset cycle, and the mode is switched; the energy-saving mode includes: obtaining the photovoltaic power station operation data and the box transformer operation data, and associating the box transformer operation data with the energy utilization rate, thereby controlling the box transformer operation and achieving energy saving; the adjustment mode includes: obtaining the photovoltaic power station operation data and the box transformer operation data, and associating the box transformer operation data with the power generation efficiency, thereby controlling the box transformer operation. The present application determines the required energy-saving situation of the current photovoltaic power station through energy data, thereby selecting a suitable mode for processing, and can switch modes according to different real-time situations, thereby ensuring adaptability to complex and changing situations and improving energy-saving effects. The energy-saving mode better achieves the goal of energy saving, and takes into account the basic operation requirements. The adjustment mode better achieves the power demand of operation, ensuring the safe and stable operation of the power station. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0054] Figure 1 A schematic flow chart of a photovoltaic power station box transformer energy-saving control method proposed in an embodiment of the present invention is shown;

[0055] Figure 2 The diagram shows a schematic structural diagram of a box-type transformer energy-saving control system for a photovoltaic power station proposed in an embodiment of the present invention. DETAILED DESCRIPTION

[0056] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0057] The present application provides a method for controlling energy conservation of a photovoltaic power station. Figure 1 As shown, the method includes the following steps:

[0058] Step S101 : acquiring photovoltaic power station energy data, and determining a required energy-saving level based on the photovoltaic power station energy data.

[0059] In this embodiment, the PV power station energy data includes the slope change of the overall energy utilization rate curve and the overall equipment efficiency of the PV power station. The former indicates the stability of the overall energy utilization rate, while the latter indicates the equipment efficiency of the PV power station. This allows the energy conservation requirements of the PV power station to be determined.

[0060] In some embodiments of the present application, obtaining photovoltaic power station energy data includes:

[0061] Obtain energy utilization over a period of time and construct an energy utilization change curve;

[0062] Divide the energy utilization rate change curve into multiple sub-curves according to its time length, and calculate the slope change of each sub-curve;

[0063] Eliminate the sub-curves whose slope changes exceed the first slope change threshold, and record the sub-curves whose slope changes exceed the second slope change threshold but do not exceed the first slope change threshold as the curve to be analyzed;

[0064] If the difference between the average value of the slope changes of two adjacent sub-curves of the curve to be analyzed and the slope change of the curve to be analyzed does not exceed the preset difference, then the average value is updated as the slope change of the curve to be analyzed;

[0065] If the slope change of the curve to be analyzed after the update does not exceed the second slope change threshold, the curve to be analyzed is retained;

[0066] The retained sub-curves are spliced ​​together, and the eliminated sub-curves are supplemented to obtain the slope change of the overall energy utilization rate change curve;

[0067] The slope change of the overall energy utilization rate change curve is used as the energy data of the photovoltaic power station.

[0068] In some embodiments of the present application, obtaining photovoltaic power station energy data further includes:

[0069] Obtain the equipment efficiency of each device in the photovoltaic power station and determine the equipment efficiency of the photovoltaic power station as a whole;

[0070]

[0071] Among them, P is the overall equipment efficiency of the photovoltaic power station, exp is the exponential function, n is the number of equipment in the photovoltaic power station, α i is the efficiency impact weight corresponding to the i-th device, Q i is the equipment efficiency corresponding to the i-th equipment, m is the number of equipment whose equipment efficiency exceeds the reasonable value, W j is the equipment efficiency of the jth equipment that exceeds the reasonable value, E j is the efficiency threshold of the jth device that exceeds the reasonable value, k1 is the first preset constant;

[0072] The overall equipment efficiency of the photovoltaic power station is used as the energy data of the photovoltaic power station.

[0073] In this embodiment, Indicates the correction to the overall efficiency due to equipment with higher efficiency.

[0074] Step S102: Select an energy-saving mode or an adjustment mode according to the required energy-saving level.

[0075] In some embodiments of the present application, the energy-saving mode or the adjustment mode is selected according to the required energy-saving level, including:

[0076] If the required energy saving level exceeds the preset energy saving level, select the energy saving mode;

[0077] Otherwise, select Regulation mode.

[0078] In this embodiment, the energy-saving mode is a mode that emphasizes energy saving while taking into account basic operation. The adjustment mode is a mode that emphasizes the operating state while taking into account basic energy-saving requirements.

[0079] In some embodiments of the present application, determining the required energy saving level based on the photovoltaic power station energy data includes:

[0080]

[0081] Wherein, L is the required energy-saving level, P is the overall equipment efficiency of the photovoltaic power station, β1 is the correction coefficient corresponding to the difference between the slope change and the preset value, k2 is the second preset constant, β2 is the fixed correction coefficient, k3 is the third preset constant, M is the conversion coefficient, and [] is the rounding symbol.

[0082] In this embodiment, the correction coefficient corresponding to the difference between the slope change amount and the preset value has a correction coefficient corresponding to each difference.

[0083] Step S103, controlling the photovoltaic power station through the energy-saving mode or the regulation mode. During the control process, the required energy-saving level is obtained according to a preset cycle, and the mode is switched;

[0084] Energy saving modes include:

[0085] Acquire the operating data of the photovoltaic power station and the box transformer, and associate the box transformer operating data with the energy utilization rate to control the box transformer operation and achieve energy saving.

[0086] In some embodiments of the present application, the box-type transformer operation data is associated with the energy utilization rate to control the box-type transformer operation, including:

[0087] Predict the future operation data of the photovoltaic power station in the future based on the operation data of the photovoltaic power station;

[0088] The future operating data of the box-type transformer is determined based on the future operating data of the photovoltaic power station and the preset matching relationship;

[0089] The trend of the box-type transformer data is determined based on the box-type transformer operation data and the box-type transformer future operation data, and the trend of the energy utilization rate is determined based on the box-type transformer data trend, so as to adjust the box-type transformer future operation data.

[0090] In this embodiment, the preset matching relationship is the corresponding relationship between the photovoltaic power station operation data and the box-type transformer operation data.

[0091] In this embodiment, the trend is increasing or decreasing, so as to determine the changing trend of the energy utilization rate. If the changing trend of the energy utilization rate is decreasing, the future operation data of the box transformer is adjusted accordingly so that the changing trend of the energy utilization rate is increasing.

[0092] Adjustment modes include:

[0093] Acquire the operating data of the photovoltaic power station and the box-type transformer, and associate the box-type transformer operating data with the power generation efficiency to control the box-type transformer operation.

[0094] In some embodiments of the present application, the box-type transformer operation data is associated with the power generation efficiency to control the box-type transformer operation, including:

[0095] Predict the future operation data of the photovoltaic power station in the future based on the operation data of the photovoltaic power station;

[0096] The future operating data of the box-type transformer is determined based on the future operating data of the photovoltaic power station and the preset matching relationship;

[0097] The trend of the box-type transformer data is determined based on the box-type transformer operation data and the box-type transformer future operation data, and the trend of the power generation efficiency is determined based on the box-type transformer data trend, so as to adjust the box-type transformer future operation data.

[0098] In this embodiment, the specific adjustment process of the adjustment mode is the same as that of the energy-saving mode, and will not be repeated here.

[0099] In some embodiments of the present application, during the control process, the required energy saving level is obtained according to a preset period and mode switching is performed, including:

[0100] If the energy-saving mode is in operation and the required energy-saving level obtained according to the preset period does not exceed the preset energy-saving level, the energy-saving mode is switched to the adjustment mode;

[0101] If the system is in the adjustment mode and the required energy-saving level obtained according to the preset period exceeds the preset energy-saving level, the adjustment mode is switched to the energy-saving mode.

[0102] By applying the above technical solutions, the energy data of the photovoltaic power station is obtained, and the required energy-saving level is determined based on the energy data of the photovoltaic power station; the energy-saving mode or the adjustment mode is selected based on the required energy-saving level; the photovoltaic power station is controlled through the energy-saving mode or the adjustment mode, and during the control process, the required energy-saving level is obtained according to the preset cycle, and the mode is switched; the energy-saving mode includes: obtaining the photovoltaic power station operation data and the box transformer operation data, and associating the box transformer operation data with the energy utilization rate, thereby controlling the box transformer operation and achieving energy saving; the adjustment mode includes: obtaining the photovoltaic power station operation data and the box transformer operation data, and associating the box transformer operation data with the power generation efficiency, thereby controlling the box transformer operation. The present application determines the required energy-saving situation of the current photovoltaic power station through energy data, thereby selecting a suitable mode for processing, and can switch modes according to different real-time situations, thereby ensuring adaptability to complex and changing situations and improving energy-saving effects. The energy-saving mode better achieves the goal of energy saving, and takes into account the basic operation requirements. The adjustment mode better achieves the power demand of operation, ensuring the safe and stable operation of the power station.

[0103] Through the description of the above embodiments, those skilled in the art can clearly understand that the present invention can be implemented through hardware or by using software plus the necessary general hardware platform. Based on this understanding, the technical solution of the present invention can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (such as a CD-ROM, a USB flash drive, a mobile hard disk, etc.) and includes a number of instructions for enabling a computer device (such as a personal computer, a server, or a network device) to execute the methods described in various implementation scenarios of the present invention.

[0104] In order to further illustrate the technical idea of ​​the present invention, the technical solution of the present invention is now described in combination with specific application scenarios.

[0105] Correspondingly, this application also provides a photovoltaic power station box transformer energy-saving control system, such as Figure 2 As shown, the system includes:

[0106] The first module 201 is used to obtain photovoltaic power station energy data and determine the required energy saving level based on the photovoltaic power station energy data;

[0107] The second module 202 is used to select an energy-saving mode or a regulating mode according to the required energy-saving level;

[0108] The third module 203 is used to control the photovoltaic power station through the energy-saving mode or the regulation mode. During the control process, the required energy-saving level is obtained according to a preset cycle and the mode is switched;

[0109] The second module 202 is used for:

[0110] Energy saving modes include:

[0111] Acquire PV power station operation data and box-type transformer operation data, and associate the box-type transformer operation data with energy utilization rate to control box-type transformer operation and achieve energy saving;

[0112] Adjustment modes include:

[0113] Acquire the operating data of the photovoltaic power station and the box-type transformer, and associate the box-type transformer operating data with the power generation efficiency to control the box-type transformer operation.

[0114] In some embodiments of the present application, the first module 201 is used to:

[0115] Obtain energy utilization over a period of time and construct an energy utilization change curve;

[0116] Divide the energy utilization rate change curve into multiple sub-curves according to its time length, and calculate the slope change of each sub-curve;

[0117] Eliminate the sub-curves whose slope changes exceed the first slope change threshold, and record the sub-curves whose slope changes exceed the second slope change threshold but do not exceed the first slope change threshold as the curve to be analyzed;

[0118] If the difference between the average value of the slope changes of two adjacent sub-curves of the curve to be analyzed and the slope change of the curve to be analyzed does not exceed the preset difference, then the average value is updated as the slope change of the curve to be analyzed;

[0119] If the slope change of the curve to be analyzed after the update does not exceed the second slope change threshold, the curve to be analyzed is retained;

[0120] The retained sub-curves are spliced ​​together, and the eliminated sub-curves are supplemented to obtain the slope change of the overall energy utilization rate change curve;

[0121] The slope change of the overall energy utilization rate change curve is used as the energy data of the photovoltaic power station.

[0122] In some embodiments of the present application, the first module 201 is used to:

[0123] Obtain the equipment efficiency of each device in the photovoltaic power station and determine the equipment efficiency of the photovoltaic power station as a whole;

[0124]

[0125] Among them, P is the overall equipment efficiency of the photovoltaic power station, exp is the exponential function, n is the number of equipment in the photovoltaic power station, α i is the efficiency impact weight corresponding to the i-th device, Q iis the equipment efficiency corresponding to the i-th equipment, m is the number of equipment whose equipment efficiency exceeds the reasonable value, W j is the equipment efficiency of the jth equipment that exceeds the reasonable value, E j is the efficiency threshold of the jth device that exceeds the reasonable value, k1 is the first preset constant;

[0126] The overall equipment efficiency of the photovoltaic power station is used as the energy data of the photovoltaic power station.

[0127] In some embodiments of the present application, the first module 201 is used to:

[0128]

[0129] Wherein, L is the required energy-saving level, P is the overall equipment efficiency of the photovoltaic power station, β1 is the correction coefficient corresponding to the difference between the slope change and the preset value, k2 is the second preset constant, β2 is the fixed correction coefficient, k3 is the third preset constant, M is the conversion coefficient, and [] is the rounding symbol.

[0130] In some embodiments of the present application, the second module 202 is configured to:

[0131] If the required energy saving level exceeds the preset energy saving level, select the energy saving mode;

[0132] Otherwise, select Regulation mode.

[0133] In some embodiments of the present application, the third module 203 is used to:

[0134] Predict the future operation data of the photovoltaic power station in the future based on the operation data of the photovoltaic power station;

[0135] The future operating data of the box-type transformer is determined based on the future operating data of the photovoltaic power station and the preset matching relationship;

[0136] The trend of the box-type transformer data is determined based on the box-type transformer operation data and the box-type transformer future operation data, and the trend of the energy utilization rate is determined based on the box-type transformer data trend, so as to adjust the box-type transformer future operation data.

[0137] In some embodiments of the present application, the third module 203 is used to:

[0138] Predict the future operation data of the photovoltaic power station in the future based on the operation data of the photovoltaic power station;

[0139] The future operating data of the box-type transformer is determined based on the future operating data of the photovoltaic power station and the preset matching relationship;

[0140] The trend of the box-type transformer data is determined based on the box-type transformer operation data and the box-type transformer future operation data, and the trend of the power generation efficiency is determined based on the box-type transformer data trend, so as to adjust the box-type transformer future operation data.

[0141] In some embodiments of the present application, the third module 203 is used to:

[0142] If the energy-saving mode is in operation and the required energy-saving level obtained according to the preset period does not exceed the preset energy-saving level, the energy-saving mode is switched to the adjustment mode;

[0143] If the system is in the adjustment mode and the required energy-saving level obtained according to the preset period exceeds the preset energy-saving level, the adjustment mode is switched to the energy-saving mode.

[0144] Those skilled in the art will appreciate that the modules in the system of the implementation scenario can be distributed in the system of the implementation scenario according to the implementation scenario description, or can be modified accordingly and located in one or more systems different from the implementation scenario. The modules of the above implementation scenario can be combined into one module or further divided into multiple submodules.

[0145] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A photovoltaic power station box transformer energy-saving control method, characterized in that: The method comprises: Obtaining photovoltaic power station energy data and determining the required energy saving level based on the photovoltaic power station energy data; Select energy-saving mode or regulation mode according to the required energy-saving level; The photovoltaic power station is controlled through energy-saving mode or regulation mode. During the control process, the required energy-saving level is obtained according to the preset cycle and the mode is switched; Energy saving modes include: Acquire PV power station operation data and box-type transformer operation data, and associate the box-type transformer operation data with energy utilization rate to control box-type transformer operation and achieve energy saving; Adjustment modes include: Acquire the operating data of the photovoltaic power station and the box-type transformer, and associate the box-type transformer operating data with the power generation efficiency to control the box-type transformer operation.

2. The photovoltaic power station box transformer energy-saving control method according to claim 1, characterized in that: Obtain PV power plant energy data, including: Obtain energy utilization over a period of time and construct an energy utilization change curve; Divide the energy utilization rate change curve into multiple sub-curves according to its time length, and calculate the slope change of each sub-curve; Eliminate the sub-curves whose slope changes exceed the first slope change threshold, and record the sub-curves whose slope changes exceed the second slope change threshold but do not exceed the first slope change threshold as the curve to be analyzed; If the difference between the average value of the slope changes of two adjacent sub-curves of the curve to be analyzed and the slope change of the curve to be analyzed does not exceed the preset difference, then the average value is updated as the slope change of the curve to be analyzed; If the slope change of the curve to be analyzed after the update does not exceed the second slope change threshold, the curve to be analyzed is retained; The retained sub-curves are spliced ​​together, and the eliminated sub-curves are supplemented to obtain the slope change of the overall energy utilization rate change curve; The slope change of the overall energy utilization rate change curve is used as the energy data of the photovoltaic power station.

3. The photovoltaic power station box transformer energy-saving control method according to claim 2, characterized in that: Acquisition of photovoltaic power plant energy data, including: Obtain the equipment efficiency of each device in the photovoltaic power station and determine the equipment efficiency of the photovoltaic power station as a whole; Among them, P is the overall equipment efficiency of the photovoltaic power station, exp is the exponential function, n is the number of equipment in the photovoltaic power station, α i is the efficiency impact weight corresponding to the i-th device, Q i is the equipment efficiency corresponding to the i-th equipment, m is the number of equipment whose equipment efficiency exceeds the reasonable value, W j is the equipment efficiency of the jth equipment that exceeds the reasonable value, E j is the efficiency threshold of the jth device that exceeds the reasonable value, k1 is the first preset constant; The overall equipment efficiency of the photovoltaic power station is used as the energy data of the photovoltaic power station.

4. The photovoltaic power station box transformer energy-saving control method according to claim 3, characterized in that: The required energy saving level is determined based on the energy data of the photovoltaic power station, including: Wherein, L is the required energy-saving level, P is the overall equipment efficiency of the photovoltaic power station, β1 is the correction coefficient corresponding to the difference between the slope change and the preset value, k2 is the second preset constant, β2 is the fixed correction coefficient, k3 is the third preset constant, M is the conversion coefficient, and [] is the rounding symbol.

5. The photovoltaic power station box transformer energy-saving control method according to claim 1, characterized in that: Select Energy Saving Mode or Regulation Mode according to the required energy saving level, including: If the required energy saving level exceeds the preset energy saving level, select the energy saving mode; Otherwise, select Regulation mode.

6. The photovoltaic power station box transformer energy-saving control method according to claim 1, characterized in that: The box-type transformer operation data is associated with energy utilization to control the box-type transformer operation, including: Predict the future operation data of the photovoltaic power station in the future based on the operation data of the photovoltaic power station; The future operating data of the box-type transformer is determined based on the future operating data of the photovoltaic power station and the preset matching relationship; The trend of the box-type transformer data is determined based on the box-type transformer operation data and the box-type transformer future operation data, and the trend of the energy utilization rate is determined based on the box-type transformer data trend, so as to adjust the box-type transformer future operation data.

7. The photovoltaic power station box transformer energy-saving control method according to claim 1, characterized in that: The box-type transformer operation data is associated with power generation efficiency to control the box-type transformer operation, including: Predict the future operation data of the photovoltaic power station in the future based on the operation data of the photovoltaic power station; The future operating data of the box-type transformer is determined based on the future operating data of the photovoltaic power station and the preset matching relationship; The trend of the box-type transformer data is determined based on the box-type transformer operation data and the box-type transformer future operation data, and the trend of the power generation efficiency is determined based on the box-type transformer data trend, so as to adjust the box-type transformer future operation data.

8. The photovoltaic power station box transformer energy-saving control method according to claim 5, characterized in that: During the control process, the required energy saving level is obtained according to the preset cycle and the mode is switched, including: If the energy-saving mode is in operation and the required energy-saving level obtained according to the preset period does not exceed the preset energy-saving level, the energy-saving mode is switched to the adjustment mode; If the system is in the adjustment mode and the required energy-saving level obtained according to the preset period exceeds the preset energy-saving level, the adjustment mode is switched to the energy-saving mode.

9. A photovoltaic power station box transformer energy-saving control system, characterized in that: The system comprises: The first module is used to obtain the energy data of the photovoltaic power station and determine the required energy saving level based on the energy data of the photovoltaic power station; The second module is used to select the energy-saving mode or the regulation mode according to the required energy-saving level; The third module is used to control the photovoltaic power station through energy-saving mode or regulation mode. During the control process, the required energy-saving level is obtained according to the preset cycle and the mode is switched; The second module is used to: Energy saving modes include: Acquire PV power station operation data and box-type transformer operation data, and associate the box-type transformer operation data with energy utilization rate to control box-type transformer operation and achieve energy saving; Adjustment modes include: Acquire the operating data of the photovoltaic power station and the box-type transformer, and associate the box-type transformer operating data with the power generation efficiency to control the box-type transformer operation.

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