Fan battery energy efficiency management method and device, wind power generation system and storage medium

Abstract

The invention relates to the technical field of electric power supply, in particular to a fan battery energy efficiency management method and device, a wind power generation system and a storage medium. And determining a battery discharge strategy according to the power consumption demand and the current battery capacity of the battery body at the current moment, and supplying power to a user load according to the battery discharge strategy. The invention aims to improve the energy efficiency management and control capability of the wind power generation system on the battery body so as to continuously meet the power demand of an electricity load.

Description

Technical Field

[0001] The present application relates to the field of power supply technology, and in particular to a method and device for managing wind turbine battery energy efficiency, a wind power generation system and a storage medium. Background Art

[0002] With the rapid development of renewable energy and the popularization of smart grids, wind power generation systems, as an important component, are increasingly valued for their stability and reliability. In the event of a power outage caused by a grid failure or maintenance, the wind turbine battery in the wind power generation system - UPS (Uninterruptible Power Supply, also known as the battery body) as a key backup power source is crucial to ensuring the data security of the wind power generation system and the continuous power supply of important loads such as the main control cabinet. Users also have higher requirements for the discharge time of wind turbine batteries, generally expecting a continuous power supply capacity of 30 minutes or even more than two hours to ensure that the system can operate stably and complete the necessary data storage and transfer in the event of an unexpected power outage.

[0003] However, as the core energy storage component in the wind power generation system, the performance of existing wind turbine batteries is affected by the attenuation characteristics of UPS batteries. Long-term overcharging and over-discharging will affect the service life of wind turbine batteries, making it impossible for wind turbine batteries to meet the power demand of power loads before reaching their service life, which has a serious adverse impact on the energy efficiency management of wind turbine batteries.

[0004] Therefore, how to improve the wind power generation system's ability to control the energy efficiency of the battery itself so as to continuously meet the power demand of the power load is a technical problem that needs to be solved urgently. Summary of the invention

[0005] The main purpose of this application is to provide a wind turbine battery energy efficiency management method, device, wind power generation system and storage medium, aiming to improve the accuracy of wind turbine battery energy efficiency management.

[0006] To achieve the above objectives, the present application provides a wind turbine battery energy efficiency management method, the wind turbine battery energy efficiency management method comprising:

[0007] Obtain the power demand of the user's load when it is powered by the mains power supply;

[0008] A battery discharge strategy is determined according to the power demand and the current battery capacity of the battery body at the current moment, and power is supplied to the user load according to the battery discharge strategy.

[0009] In one embodiment, the step of determining the battery discharge strategy based on the power demand and the current battery capacity of the battery body includes:

[0010] When the mains power supply is in an abnormal power supply state, determining the current battery capacity of the battery body at the current moment, and detecting whether the power demand exceeds the current battery capacity;

[0011] If the power demand does not exceed the current battery capacity, determining that the battery discharge strategy is a main body power supply strategy, wherein the main body power supply strategy is configured to supply power to the user load through the battery main body;

[0012] If the power demand exceeds the current battery capacity, the battery discharge strategy is determined to be a redundant power supply strategy, and the redundant power supply strategy is set so that the battery body and a preset backup power supply synchronously supply power to the user load.

[0013] In one embodiment, the step of supplying power to the user load according to the battery discharging strategy includes:

[0014] When the battery discharge strategy is a main body power supply strategy, determining the operating temperature of the battery main body when supplying power to the user load, and determining the number of battery cycles according to the discharge depth of the battery main body and the operating temperature;

[0015] After determining that the battery cycle number exceeds a preset battery cycle threshold, the main power supply strategy is switched to a redundant power supply strategy, and the user load is powered according to the redundant power supply strategy.

[0016] In one embodiment, after the step of determining the number of battery cycles according to the discharge depth of the battery body and the operating temperature, the wind turbine battery energy efficiency management method includes:

[0017] After determining that the number of battery cycles does not exceed a preset battery cycle threshold, determining a total power supply time for the battery body to supply power to the user load;

[0018] The user load is powered according to a power supply adjustment strategy determined according to the total power supply time and the remaining battery capacity of the battery body.

[0019] In one embodiment, the step of supplying power to the user load according to the power supply adjustment strategy determined based on the total power supply duration and the remaining battery capacity of the battery body includes:

[0020] When the total power supply time is less than the preset safe power supply time or the remaining battery capacity is less than the preset battery safety capacity threshold, it is determined that the power supply adjustment strategy is switched from the main power supply strategy to the backup power supply strategy to supply power to the user load;

[0021] When the total power supply duration is greater than or equal to the safe power supply duration and the remaining battery capacity is greater than or equal to the battery safety capacity threshold, the power supply adjustment strategy is determined to maintain the main power supply strategy unchanged and the user load is continuously powered.

[0022] In one embodiment, the step of determining the number of battery cycles based on the discharge depth of the battery body and the operating temperature includes:

[0023] Acquire the pre-discharge capacity of the battery body before discharging to the user load, and the post-discharge capacity of the battery body after discharging to the user load;

[0024] The discharge depth of the battery body is determined according to the pre-discharge capacity and the post-discharge capacity, and the discharge depth and the operating temperature are trained according to a preset battery cycle prediction model to obtain the number of battery cycles of the battery body.

[0025] In one embodiment, the wind turbine battery energy efficiency management method includes:

[0026] When the mains power supply is in a normal power supply state, determining the charged battery capacity of the battery body at the next moment after the current moment, and obtaining a power deviation value between the current battery capacity and the charged battery capacity;

[0027] After determining that the capacity of the charged battery is less than a preset maximum charging threshold of the battery, proportionally controlling the power deviation value according to a preset proportional control algorithm to obtain a large charging current, adjusting the charging current sent by the mains power supply to the battery body to the large charging current, and charging the battery body;

[0028] When the actual battery capacity of the charged battery body reaches the maximum battery charging threshold, the charging current is adjusted to a preset constant voltage low current to charge the battery body, so as to maintain the actual battery capacity at the maximum battery charging threshold.

[0029] In addition, to achieve the above-mentioned purpose, the present application also provides a wind turbine battery energy efficiency management device, the wind turbine battery energy efficiency management device comprising:

[0030] An acquisition module is used to obtain the power demand of the user load when the user load is supplied by the mains power supply;

[0031] The power supply module is used to determine a battery discharge strategy according to the power demand and the current battery capacity of the battery body at the current moment, and to supply power to the user load according to the battery discharge strategy.

[0032] Each functional module of the wind turbine battery energy efficiency management device of the present application implements the steps of the wind turbine battery energy efficiency management method of the present application as described above during operation.

[0033] In addition, to achieve the above-mentioned purpose, the present application also provides a device, which includes a memory, a processor, and a wind turbine battery energy efficiency management program stored on the memory and executable on the processor, and the wind turbine battery energy efficiency management program implements the steps of the above-mentioned wind turbine battery energy efficiency management method when executed by the processor.

[0034] In addition, to achieve the above-mentioned purpose, the present application also provides a storage medium, which is a computer-readable storage medium, and a wind turbine battery energy efficiency management program is stored on the computer-readable storage medium. When the wind turbine battery energy efficiency management program is executed by the processor, the steps of the above-mentioned wind turbine battery energy efficiency management method are implemented.

[0035] The present application provides a wind turbine battery energy efficiency management method to optimize the energy efficiency control capability of the existing wind power generation system for the battery body. Specifically, the present application can accurately obtain the power demand of the user load when the mains power supply is supplied, and combine the battery discharge strategy obtained by the current battery capacity of the battery body at the current moment, effectively avoiding the overcharge and over-discharge of the battery body, further delaying the service life of the battery body; and realizing efficient power supply to the user load according to the battery discharge strategy, so as to ensure that the power demand of the power load can be continuously and stably met by the battery body when the mains power is unstable or interrupted, thereby significantly improving the energy efficiency control capability of the wind power generation system for the battery body. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a flow chart of the first embodiment of the wind turbine battery energy efficiency management method of the present application;

[0037] Figure 2 It is a schematic diagram of the structure of a wind power generation system involved in the embodiment of the present application;

[0038] Figure 3 This is a flow chart of the second embodiment of the wind turbine battery energy efficiency management method of the present application;

[0039] Figure 4 It is a schematic diagram of a battery discharge strategy adjustment process involved in an embodiment of the present application;

[0040] Figure 5 It is a schematic diagram of the battery charging process involved in the embodiment of the present application;

[0041] Figure 6 It is a structural schematic diagram of a wind turbine battery energy efficiency management device involved in an embodiment of the present application;

[0042] Figure 7 This is a schematic diagram of the structure of a wind power generation system involved in an embodiment of the present application.

[0043] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0044] The present application embodiment provides a wind turbine battery energy efficiency management method, referring to Figure 1 As shown, Figure 1 It is a flow chart of the first embodiment of the wind turbine battery energy efficiency management method of the present application.

[0045] Here, exemplary embodiments are described in detail, and examples thereof are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application.

[0046] As the world's reliance on renewable energy grows, wind power generation, as one of the important clean energy sources, has received unprecedented attention for its reliability and stability. In a wind power generation system, the stable operation of the control system is directly related to the generation and transmission of electric energy. Among them, the main control cabinet, as the core control unit, has an uninterruptible power supply capability that is the key to ensuring the stable operation of the entire wind farm. As an important backup power source for the main control cabinet, UPS (Uninterruptible Power Supply) is responsible for the important task of providing continuous power to the main control cabinet and other key loads in the event of a power outage or abnormality.

[0047] Currently, users generally require UPS to discharge for 30 minutes, and some even require more than 2 hours. Based on this consideration, an external backup battery is needed. Due to the battery attenuation characteristics of UPS, long-term overcharging and over-discharging will affect the battery life, making the UPS unable to meet the power demand before reaching its service life. Therefore, effective energy efficiency management of UPS is required.

[0048] Therefore, in order to solve the technical problem that wind turbine batteries in existing wind power generation systems have poor energy efficiency control capabilities, the present application provides a wind turbine battery energy efficiency management method, device, wind power generation system and storage medium.

[0049] It should be noted that the execution subject of this embodiment may be a computing service device with data processing, network communication and program running functions, such as a tablet computer, a personal computer, a mobile phone, a database system, etc., or a device capable of realizing the above functions, such as a wind power generation system or a wind power generation system, etc. The following takes the wind power generation system as an example to illustrate this embodiment and the following embodiments.

[0050] The wind turbine battery energy efficiency management method of the present application includes the following implementation steps S10 to S20.

[0051] Step S10: Obtain the power demand of the user load when the user load is powered by the mains power supply.

[0052] In this embodiment, refer to Figure 2 , Figure 2 It is a schematic diagram of the structure of the wind power generation system involved in the embodiment scheme of the present application. The wind power generation system provided in the present application includes a mains rectifier boost circuit, an inverter, a conversion switch, a battery pack, a battery boost circuit and a user load. Exemplarily, the mains power supply (220Vac, 220V AC voltage) flows into the user load through the mains rectifier boost circuit, inverter and conversion switch that are electrically connected in sequence to form a mains power supply circuit, and the battery voltage of the battery pack or the battery pack parallel backup power supply flows into the user load through the battery boost circuit, inverter and conversion switch that are electrically connected in sequence to form a battery power supply circuit, wherein the battery body is constructed by the battery pack, battery boost circuit and inverter that are electrically connected in sequence. Specifically, when the mains power supply normally supplies power to the user load through the mains power supply circuit, the wind power generation system collects the power consumption of the user load when the mains power supply is supplied in real time according to the preset collection frequency until. Figure 2 When the conversion switch shown does not receive the AC power signal transmitted by the AC power supply, it is determined that the AC power supply is in an abnormal state (i.e., the AC power is interrupted), and the power consumption collected at the previous moment before the AC power interruption is used as the power demand of the user load when the AC power supply is supplied. This provides accurate and reliable power demand for subsequent user loads to continue to obtain stable power supply through the battery power supply circuit when the AC power fails.

[0053] It should be noted that the wind power generation system provided in this application also includes Figure 2 As shown in the charger. Exemplarily, when the mains power supply is normal, the mains rectifier boost circuit boosts the 220V AC voltage input by the mains power supply into a stable DC voltage DC / AC inverter through PFC (power factor correction) and outputs it to the user load, and simultaneously charges the battery pack in the battery body through the charger; when the mains power supply is abnormal (i.e., the mains power is interrupted), the present application sets a battery pack or a battery pack parallel backup power supply to boost the DC voltage through the DC / DC battery boost circuit and then provide it to the DC / AC inverter, so that the DC / AC inverter converts the DC voltage into AC voltage and then supplies power to the user load.

[0054] The backup power supply can also be understood as a large-capacity backup battery, and the backup power supply is externally installed on the top of the cabinet of the wind power generation system.

[0055] Step S20: determining a battery discharge strategy according to the power demand and the current battery capacity of the battery body at the current moment, and supplying power to the user load according to the battery discharge strategy.

[0056] In this embodiment, the battery discharge strategy can be dynamically optimized based on the power demand and the current battery capacity of the battery body at the current moment. When the AC power supply is abnormal and the power demand of the user load is continuously met through the battery body, the user load is powered according to the battery discharge strategy, thereby ensuring that the service life and utilization efficiency of the battery body are maximized, and effectively avoiding energy waste caused by excessive discharge or ineffective power supply. That is, when providing a stable and reliable power supply to the user load, the wind power generation system's energy efficiency control capability of the battery body is significantly improved.

[0057] It should be noted that the battery discharge strategy can be a main power supply strategy or a redundant power supply strategy, wherein the main power supply strategy is set to power the user load through the battery body, and the redundant power supply strategy is set to power the user load synchronously with the battery body and the preset backup power supply.

[0058] In summary, the present application provides a wind turbine battery energy efficiency management method to optimize the energy efficiency management capability of the existing wind power generation system for the battery body. Specifically, the present application can accurately obtain the power demand of the user load when the mains power supply is supplied, and combine the battery discharge strategy obtained by intelligently obtaining the current battery capacity of the battery body at the current moment, effectively avoiding the overcharge and over-discharge of the battery body, and further delaying the service life of the battery body; and according to the battery discharge strategy, efficient power supply to the user load is achieved to ensure that the power demand of the power load can be continuously and stably met by the battery body when the mains power is unstable or interrupted, thereby significantly improving the wind power generation system's ability to manage the battery body.

[0059] Furthermore, based on the first embodiment of the wind turbine battery energy efficiency management method of the present application, a second embodiment of the wind turbine battery energy efficiency management method of the present application is proposed. Figure 3 , Figure 3 This is a flow chart of the second embodiment of the wind turbine battery energy efficiency management method of the present application. In some feasible embodiments, the above step S20: determining the battery discharge strategy according to the power demand and the current battery capacity of the battery body at the current moment, also includes the following implementation steps S201 to S203.

[0060] Step S201: when the mains power supply is in an abnormal power supply state, determining the current battery capacity of the battery body at the current moment, and detecting whether the power demand exceeds the current battery capacity.

[0061] In this embodiment, when the AC power supply is in an abnormal power supply state, the current battery capacity of the battery body at the current moment can be accurately obtained, and it can be detected whether the power demand exceeds the current battery capacity, that is, by comparing the size relationship between the power demand and the current battery capacity, the optimal battery discharge strategy is selected to ensure the continuity and reliability of power supply to the user load.

[0062] Step S202: If the power demand does not exceed the current battery capacity, the battery discharge strategy is determined to be a main body power supply strategy, and the main body power supply strategy is set to supply power to the user load through the battery main body.

[0063] In this embodiment, if the power demand does not exceed the current battery capacity, the battery discharge strategy is determined to be a main body power supply strategy, wherein the main body power supply strategy is configured to supply power to the user load through the battery main body.

[0064] Step S203: If the power demand exceeds the current battery capacity, the battery discharge strategy is determined to be a redundant power supply strategy, and the redundant power supply strategy is set so that the battery body and a preset backup power supply synchronously supply power to the user load.

[0065] In this embodiment, if the power demand exceeds the current battery capacity, the battery discharge strategy is determined to be a redundant power supply strategy, wherein the redundant power supply strategy is set to synchronize the battery body with a preset backup power supply to supply power to the user load.

[0066] In summary, when the AC power supply has an abnormal power supply condition, the system will immediately measure the current battery capacity of the battery body and compare it with the power demand of the user load. If the power demand does not exceed the current power supply capacity of the battery, the wind power generation system set in this application will automatically select the battery discharge strategy as the main power supply strategy, that is, directly supply power to the user load through the battery body. However, if the power demand exceeds the current battery capacity of the battery, the wind power generation system will automatically select the battery discharge strategy as a redundant power supply strategy to ensure that the battery body and the preset backup power supply work together to meet the power demand of the user load, thereby ensuring the continuity and stability of power supply.

[0067] Further, in some feasible embodiments, referring to Figure 4 , Figure 4 It is a schematic diagram of the battery discharge strategy adjustment process involved in the embodiment of the present application. The above step S20: powering the user load according to the battery discharge strategy, also includes the following implementation steps A10 to A20.

[0068] Step A10: When the battery discharge strategy is a main body power supply strategy, determine the operating temperature of the battery main body when supplying power to the user load, and determine the number of battery cycles according to the discharge depth of the battery main body and the operating temperature.

[0069] In this embodiment, refer to Figure 4 If the current battery capacity of the battery body is greater than or equal to the power demand, the battery discharge strategy is determined to be the body power supply strategy to supply power to the user load (that is, the battery body supplies power to the user load). At this time, the wind power generation system obtains the operating temperature of the battery body when supplying power to the user load, and the battery cycle number can be accurately obtained based on the discharge depth and operating temperature of the battery body, so as to accurately evaluate the health status and remaining life of the battery body, and provide an accurate and reliable battery cycle number for realizing the energy efficiency management of the battery body, and then the service life of the battery body can be further extended according to the battery cycle number, which significantly improves the energy efficiency management capability of the wind power generation system for the battery body.

[0070] Step A20: after determining that the battery cycle number exceeds a preset battery cycle threshold, switching the main power supply strategy to a redundant power supply strategy, and supplying power to the user load according to the redundant power supply strategy.

[0071] In this embodiment, refer to Figure 4 , detect whether the number of battery cycles exceeds the preset battery cycle threshold. If the number of battery cycles exceeds the preset battery cycle threshold, the battery discharge strategy is switched from the main power supply strategy to the redundant power supply strategy. That is to say, a backup power supply is connected in parallel with the battery main body to share the power supply pressure of the battery main body through the additional energy supply provided by the backup power supply. This not only effectively slows down the further aging speed of the battery main body, but also reduces the risk of power supply interruption caused by battery performance degradation, and also ensures the stability and continuity of power supply to user loads.

[0072] It should be noted that the preset battery cycle threshold can be customized according to user needs, and this application does not impose any restrictions here.

[0073] Further, in some other feasible embodiments, referring to Figure 4 , Figure 4 It is a schematic diagram of the battery discharge strategy adjustment process involved in the embodiment of the present application. In the above step A10: the number of battery cycles is determined according to the discharge depth of the battery body and the operating temperature. The subsequent wind turbine battery energy efficiency management method also includes the following implementation steps B10 to B10.

[0074] Step B10: after determining that the number of battery cycles does not exceed a preset battery cycle threshold, determining a total power supply time for the battery body to supply power to the user load.

[0075] In this embodiment, refer to Figure 4 If it is detected that the number of battery cycles is less than or equal to the preset battery cycle threshold, the total power supply time of the battery body to the user load is determined, so as to accurately reflect the workload of the battery body in actual use, so that the wind power generation system can better manage the energy efficiency of the battery body, ensuring that while continuously meeting the power demand of the user load, it also takes into account the healthy status of the battery body, providing an accurate and reliable total power supply time for the determination of the subsequent power supply adjustment strategy.

[0076] Step B10: supplying power to the user load according to a power supply adjustment strategy determined according to the total power supply duration and the remaining battery capacity of the battery body.

[0077] In this embodiment, after obtaining the total power supply time of the battery body to the user load, an accurate and reliable power supply adjustment strategy can be obtained in combination with the remaining battery capacity of the battery body, thereby fully considering the actual usage and remaining capacity of the battery body, and realizing the maximum energy utilization and extended service life of the battery body.

[0078] Further, in some feasible embodiments, referring to Figure 4 The above-mentioned step B10: supplying power to the user load according to the power supply adjustment strategy determined by the total power supply time and the remaining battery capacity of the battery body, also includes the following implementation steps B101 to B102.

[0079] Step B101: When the total power supply time is less than the preset safe power supply time or the remaining battery capacity is less than the preset battery safety capacity threshold, the power supply adjustment strategy is determined to switch from the main power supply strategy to the backup power supply strategy to power the user load.

[0080] In this embodiment, refer to Figure 4 The wind power generation system monitors the total power supply time and the preset safe power supply time and the remaining battery capacity and the preset battery safety capacity threshold in real time. Once the total power supply time is less than the preset safe power supply time or the remaining battery capacity is less than the preset battery safety capacity threshold, the power supply adjustment strategy is immediately determined to switch from the main power supply strategy to the backup power supply strategy, preventing the battery body from being damaged due to long-term operation or excessive discharge, ensuring the health of the battery body and the stability of the user load power supply. That is, the backup power supply strategy is used to timely introduce the backup power supply to power the user load, so as to provide continuous and reliable power support for the user load, effectively reducing the risk of power supply interruption caused by battery body failure.

[0081] It should be noted that the preset safe power supply time can be customized according to user needs, and this application does not impose any restrictions here. The preset safe power supply time can be understood as a pre-set power supply time threshold that reaches the upper limit of the battery's power consumption health.

[0082] The preset battery safety capacity threshold can be customized according to user needs, and this application does not impose any restrictions here. For example, the preset battery safety capacity threshold can be 20% of the remaining battery capacity.

[0083] Step B102: When the total power supply duration is greater than or equal to the safe power supply duration and the remaining battery capacity is greater than or equal to the battery safety capacity threshold, the power supply adjustment strategy is determined to maintain the main power supply strategy unchanged and the user load is continuously powered.

[0084] In this embodiment, refer to Figure 4 When the total power supply time is greater than or equal to the preset safe power supply time and the remaining battery capacity is greater than or equal to the preset battery safety capacity threshold, the power supply adjustment strategy is determined to maintain the main body power supply strategy unchanged, that is, when the total power supply time set by the battery body is higher than the safe power supply time and the battery body is in a high remaining amount, the main body power supply strategy set in this application can still meet the power demand of the user load and will not cause irreversible damage to the battery body. Therefore, the user load is continuously powered by the battery body, which significantly improves the energy efficiency control capability of the wind power generation system for the battery body.

[0085] Further, in some feasible embodiments, referring to Figure 4 , Figure 4 It is a schematic diagram of the battery discharge strategy adjustment process involved in the embodiment of the present application. The above step A10: determines the number of battery cycles based on the discharge depth of the battery body and the operating temperature, and also includes the following implementation steps A101 to A102.

[0086] Step A101: obtaining the pre-discharge capacity of the battery body before discharging to the user load, and the post-discharge capacity of the battery body after discharging to the user load.

[0087] In this example, the wind power generation system can accurately obtain the pre-discharge capacity of the battery body before discharging to the user load, and the post-discharge capacity of the battery body after discharging to the user load, thereby providing accurate and reliable data basis for the subsequent calculation of the discharge depth.

[0088] Step A102: Determine the discharge depth of the battery body according to the pre-discharge capacity and the post-discharge capacity, perform model training on the discharge depth and the operating temperature according to a preset battery cycle prediction model, and obtain the number of battery cycles of the battery body.

[0089] In this embodiment, the pre-discharge capacity and the post-discharge capacity are calculated according to the preset discharge depth algorithm, and the discharge depth of the battery body can be accurately obtained; next, the discharge depth and the operating temperature are input into the preset battery cycle estimation model for feature extraction, and the depth characteristics of the discharge depth and the temperature characteristics of the operating temperature can be accurately obtained, and the discharge depth weight corresponding to the depth characteristics and the operating temperature weight corresponding to the temperature characteristics are determined. Next, the product of the depth feature and the discharge depth weight, and the product of the temperature feature and the operating temperature weight are superimposed to obtain the battery comprehensive characteristic value of the battery body, and the battery cycle number corresponding to the battery comprehensive characteristic value is found from the preset feature-cycle number correspondence table, so that the health status and remaining life of the battery body can be accurately evaluated, and an accurate and reliable battery cycle number is provided for realizing the energy efficiency management of the battery body, and then the service life of the battery body can be further extended according to the battery cycle number, which significantly improves the energy efficiency management capability of the wind power generation system for the battery body.

[0090] Further, in some other feasible embodiments, referring to Figure 5 , Figure 5 It is a schematic diagram of the battery body charging process involved in the embodiment of the present application. The wind turbine battery energy efficiency management method provided in the present application may also include the following implementation steps C10 to C30.

[0091] Step C10: when the mains power supply is in a normal power supply state, determining the charged battery capacity of the battery body at the next moment after the current moment, and obtaining a power deviation value between the current battery capacity and the charged battery capacity.

[0092] In this embodiment, when the AC power supply is in a normal power supply state, the charged battery capacity of the battery body at the next moment after the current moment is determined, and the power deviation value between the current battery capacity and the charged battery capacity can be accurately obtained, thereby providing accurate and reliable data basis for adjusting the charging current during the subsequent charging process of the battery body.

[0093] It should be noted that the current battery capacity set in this application can be used Figure 5 The reference input R is shown, the charged battery capacity can be represented by the output Y, and the power deviation value can be represented by Figure 5 The deviation e shown is represented.

[0094] Step C20: After determining that the charged battery capacity is less than a preset maximum charging threshold of the battery, the power deviation value is proportionally controlled according to a preset proportional control algorithm to obtain a large charging current, and the charging current sent by the AC power supply to the battery body is adjusted to the large charging current to charge the battery body.

[0095] In this embodiment, after determining that the capacity of the charged battery is less than the preset maximum charging threshold of the battery, the power deviation value is proportionally controlled according to a preset proportional control algorithm to obtain a large charging current, and the charging current sent by the AC power supply to the battery body is adjusted to a large charging current to charge the battery body, thereby causing the charging current sent by the AC power supply to the battery body to increase rapidly to the large charging current, and the battery body is quickly charged to shorten the charging time of the battery body.

[0096] It should be noted that the preset maximum battery charge threshold can be customized according to user needs, and this application does not impose any restrictions here. Exemplarily, the maximum battery charge threshold can be set to 80% to avoid overcharging of the battery body.

[0097] The preset proportional control algorithm is P = k p *e, where P is the maximum charging current and e is the power deviation value

[0098] k p is a preset proportional constant, which can be customized according to the actual application. Figure 5 The control quantity U shown is the charging current sent by the mains power supply to the battery body. Figure 5 The controlled object shown is the battery body.

[0099] In one embodiment, the battery body is quickly charged according to the large charging current, the charging time of the charged battery capacity is determined, the charged battery capacity is used as the next current battery capacity Q1, and the charging time is used as the next current time, and the step of obtaining the power deviation value between the current battery capacity and the charged battery capacity is performed. Next, when integral control is performed based on the obtained power deviation value to eliminate the steady-state error in the battery charging process, the power deviation value is simultaneously differentially controlled to obtain a large current adjustment value, thereby adjusting the large charging current to the large current adjustment value to charge the battery body quickly and smoothly.

[0100] In addition, it should be noted that the algorithm corresponding to the integral control is I=KI*∫e dt, where KI is a preset integral constant, ∫e is the integral of the power deviation value, and dt is the time interval from the current moment to the charged moment.

[0101] The algorithm corresponding to the differential control is D=Kd*(de / dt), where Kd is a preset differential constant and de / dt is the rate of change of the electric quantity deviation value.

[0102] Step C30: until the actual battery capacity of the charged battery body reaches the maximum charging threshold of the battery, the charging current is adjusted to a preset constant voltage low current to charge the battery body, so as to maintain the actual battery capacity at the maximum charging threshold of the battery at all times.

[0103] In this embodiment, until the actual battery capacity of the battery body after charging reaches the maximum charging threshold of the battery, the charging current is adjusted to a preset constant voltage and low current to charge the battery body, so as to maintain the actual battery capacity at the maximum charging threshold of the battery at all times, thereby ensuring that after the actual battery capacity of the battery body reaches the maximum safe charging capacity, it is charged by maintaining a constant low voltage and low current, thereby effectively avoiding the risk of overcharging the battery body. The battery body is charged by a preset constant voltage and low current and the actual battery capacity of the battery body is always maintained at the maximum charging threshold of the battery, thereby ensuring the charging efficiency of the battery body. The constant voltage and low current charging mode is also used to reduce the heat generated by the battery body during the charging process, thereby further extending the service life of the battery, and significantly improving the energy efficiency control capability of the wind power generation system over the battery body.

[0104] In addition, this application also provides a wind turbine battery energy efficiency management device, please refer to Figure 6 , Figure 6 Schematic diagram of the structure of the wind turbine battery energy efficiency management device involved in the embodiment of the present application. The wind turbine battery energy efficiency management device provided in the present application includes:

[0105] The acquisition module H01 is used to obtain the power demand of the user load when the user load is supplied by the mains power supply;

[0106] The power supply module H02 is used to determine a battery discharge strategy according to the power demand and the current battery capacity of the battery body at the current moment, and to supply power to the user load according to the battery discharge strategy.

[0107] Optionally, the power supply module H02 is also used for:

[0108] When the mains power supply is in an abnormal power supply state, determining the current battery capacity of the battery body at the current moment, and detecting whether the power demand exceeds the current battery capacity;

[0109] If the power demand does not exceed the current battery capacity, determining that the battery discharge strategy is a main body power supply strategy, wherein the main body power supply strategy is configured to supply power to the user load through the battery main body;

[0110] If the power demand exceeds the current battery capacity, the battery discharge strategy is determined to be a redundant power supply strategy, and the redundant power supply strategy is set so that the battery body and a preset backup power supply synchronously supply power to the user load.

[0111] Optionally, the power supply module H02 is also used for:

[0112] When the battery discharge strategy is a main body power supply strategy, determining the operating temperature of the battery main body when supplying power to the user load, and determining the number of battery cycles according to the discharge depth of the battery main body and the operating temperature;

[0113] After determining that the battery cycle number exceeds a preset battery cycle threshold, the main power supply strategy is switched to a redundant power supply strategy, and the user load is powered according to the redundant power supply strategy.

[0114] Optionally, the power supply module H02 is also used for:

[0115] After determining that the number of battery cycles does not exceed a preset battery cycle threshold, determining a total power supply time for the battery body to supply power to the user load;

[0116] The user load is powered according to a power supply adjustment strategy determined according to the total power supply time and the remaining battery capacity of the battery body.

[0117] Optionally, the power supply module H02 is also used for:

[0118] When the total power supply time is less than the preset safe power supply time or the remaining battery capacity is less than the preset battery safety capacity threshold, it is determined that the power supply adjustment strategy is switched from the main power supply strategy to the backup power supply strategy to supply power to the user load;

[0119] When the total power supply duration is greater than or equal to the safe power supply duration and the remaining battery capacity is greater than or equal to the battery safety capacity threshold, the power supply adjustment strategy is determined to maintain the main power supply strategy unchanged and the user load is continuously powered.

[0120] Optionally, the power supply module H02 is also used for:

[0121] Acquire the pre-discharge capacity of the battery body before discharging to the user load, and the post-discharge capacity of the battery body after discharging to the user load;

[0122] The discharge depth of the battery body is determined according to the pre-discharge capacity and the post-discharge capacity, and the discharge depth and the operating temperature are trained according to a preset battery cycle prediction model to obtain the number of battery cycles of the battery body.

[0123] Optionally, the acquisition module H01 is further used for:

[0124] When the mains power supply is in a normal power supply state, determining the charged battery capacity of the battery body at the next moment after the current moment, and obtaining a power deviation value between the current battery capacity and the charged battery capacity;

[0125] After determining that the capacity of the charged battery is less than a preset maximum charging threshold of the battery, proportionally controlling the power deviation value according to a preset proportional control algorithm to obtain a large charging current, adjusting the charging current sent by the mains power supply to the battery body to the large charging current, and charging the battery body;

[0126] When the actual battery capacity of the charged battery body reaches the maximum battery charging threshold, the charging current is adjusted to a preset constant voltage low current to charge the battery body, so as to maintain the actual battery capacity at the maximum battery charging threshold at all times.

[0127] Each functional module of the wind turbine battery energy efficiency management device of the present application implements the steps of the wind turbine battery energy efficiency management method of the present application as described above during operation.

[0128] In addition, the present application also provides a wind power generation system. Figure 7 , Figure 7 The schematic diagram of the structure of the wind power generation system involved in the embodiment of the present application is shown in FIG. The device in the embodiment of the present application may be a device for locally running the wind turbine battery energy efficiency management method.

[0129] The present application provides a wind power generation system, which includes: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the wind power generation system method in the above-mentioned embodiment one.

[0130] Reference below Figure 7 , which shows a schematic diagram of the structure of a wind power generation system suitable for implementing the embodiment of the present application. The wind power generation system in the embodiment of the present application may include but is not limited to mobile terminals such as mobile phones, laptop computers, digital broadcast receivers, PDAs (Personal Digital Assistants), PADs (Portable Application Descriptions), PMPs (Portable Media Players), vehicle-mounted terminals (such as vehicle-mounted navigation terminals), etc., and fixed terminals such as digital TVs, desktop computers, etc. Figure 4 The wind power generation system shown is only an example and should not bring any limitation to the functions and scope of use of the embodiments of the present application.

[0131] like Figure 7As shown, the wind power generation system may include a processing device 1001 (e.g., a central processing unit, a graphics processor, etc.), which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM: Read Only Memory) 1002 or a program loaded from a storage device 1003 to a random access memory (RAM: Random Access Memory) 1004. In RAM1004, various programs and data required for the operation of the wind power generation system are also stored. The processing device 1001, ROM1002, and RAM1004 are connected to each other through a bus 1005. An input / output (I / O) interface 1006 is also connected to the bus. Generally, the following devices can be connected to the I / O interface 1006: an input device 1007 including, for example, a touch screen, a touch pad, a keyboard, a mouse, an image sensor, a microphone, an accelerometer, a gyroscope, etc.; an output device 1008 including, for example, a liquid crystal display (LCD: Liquid Crystal Display), a speaker, a vibrator, etc.; a storage device 1003 including, for example, a magnetic tape, a hard disk, etc.; and a communication device 1009. The communication device 1009 can allow the wind power generation system to communicate with other devices wirelessly or by wire to exchange data. Although the figure shows a wind power generation system with various devices, it should be understood that it is not required to implement or have all the devices shown. More or fewer devices can be implemented or provided alternatively.

[0132] In particular, according to the embodiments disclosed in the present application, the process described above with reference to the flowchart can be implemented as a computer software program. For example, the embodiments disclosed in the present application include a computer program product, which includes a computer program carried on a computer-readable medium, and the computer program includes a program code for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from a network through a communication device, or installed from a storage device 1003, or installed from a ROM 1002. When the computer program is executed by the processing device 1001, the above-mentioned functions defined in the method of the embodiment disclosed in the present application are executed.

[0133] The wind power generation system provided by the present application adopts the wind power generation system method in the above embodiment, which can solve the technical problem of low reliability of the wind power generation system. Compared with the prior art, the beneficial effects of the wind power generation system provided by the present application are the same as the beneficial effects of the wind power generation system method provided by the above embodiment, and other technical features of the wind power generation system are the same as the features disclosed in the method of the previous embodiment, which will not be repeated here.

[0134] In addition, the present application provides a computer-readable storage medium on which a wind turbine battery energy efficiency management program is stored, and when the wind turbine battery energy efficiency management program is executed by a processor, the steps of the wind turbine battery energy efficiency management method described above are implemented.

[0135] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or system including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or system. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or system including the element.

[0136] The serial numbers of the above-mentioned embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0137] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present application, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a computer-readable storage medium (such as ROM / RAM, magnetic disk, optical disk) as described above, and includes a number of instructions for a device (which can be a mobile phone, a computer, a server, or a network device, etc.) to execute the methods described in each embodiment of the present application.

[0138] The above are only preferred embodiments of the present application, and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A wind turbine battery energy efficiency management method, characterized in that: The wind turbine battery energy efficiency management method comprises: Obtain the power demand of the user's load when it is powered by the mains power supply; A battery discharge strategy is determined according to the power demand and the current battery capacity of the battery body at the current moment, and power is supplied to the user load according to the battery discharge strategy.

2. The wind turbine battery energy efficiency management method according to claim 1, characterized in that: The step of determining the battery discharge strategy according to the power demand and the current battery capacity of the battery body comprises: When the mains power supply is in an abnormal power supply state, determining the current battery capacity of the battery body at the current moment, and detecting whether the power demand exceeds the current battery capacity; If the power demand does not exceed the current battery capacity, determining that the battery discharge strategy is a main body power supply strategy, wherein the main body power supply strategy is configured to supply power to the user load through the battery main body; If the power demand exceeds the current battery capacity, the battery discharge strategy is determined to be a redundant power supply strategy, and the redundant power supply strategy is set so that the battery body and a preset backup power supply synchronously supply power to the user load.

3. The wind turbine battery energy efficiency management method according to claim 1, characterized in that: The step of supplying power to the user load according to the battery discharging strategy comprises: When the battery discharge strategy is a main body power supply strategy, determining the operating temperature of the battery main body when supplying power to the user load, and determining the number of battery cycles according to the discharge depth of the battery main body and the operating temperature; After determining that the battery cycle number exceeds a preset battery cycle threshold, the main power supply strategy is switched to a redundant power supply strategy, and the user load is powered according to the redundant power supply strategy.

4. The wind turbine battery energy efficiency management method according to claim 3, characterized in that: After the step of determining the number of battery cycles according to the discharge depth of the battery body and the operating temperature, the wind turbine battery energy efficiency management method includes: After determining that the number of battery cycles does not exceed a preset battery cycle threshold, determining a total power supply time for the battery body to supply power to the user load; The user load is powered according to a power supply adjustment strategy determined according to the total power supply time and the remaining battery capacity of the battery body.

5. The wind turbine battery energy efficiency management method according to claim 4, characterized in that: The step of supplying power to the user load according to the power supply adjustment strategy determined based on the total power supply duration and the remaining battery capacity of the battery body comprises: When the total power supply time is less than the preset safe power supply time or the remaining battery capacity is less than the preset battery safety capacity threshold, it is determined that the power supply adjustment strategy is switched from the main power supply strategy to the backup power supply strategy to supply power to the user load; When the total power supply duration is greater than or equal to the safe power supply duration and the remaining battery capacity is greater than or equal to the battery safety capacity threshold, the power supply adjustment strategy is determined to maintain the main power supply strategy unchanged and the user load is continuously powered.

6. The wind turbine battery energy efficiency management method according to claim 3, characterized in that: The step of determining the number of battery cycles according to the discharge depth of the battery body and the operating temperature comprises: Acquire the pre-discharge capacity of the battery body before discharging to the user load, and the post-discharge capacity of the battery body after discharging to the user load; The discharge depth of the battery body is determined according to the pre-discharge capacity and the post-discharge capacity, and the discharge depth and the operating temperature are trained according to a preset battery cycle prediction model to obtain the number of battery cycles of the battery body.

7. The wind turbine battery energy efficiency management method according to claim 1, characterized in that: The wind turbine battery energy efficiency management method comprises: When the mains power supply is in a normal power supply state, determining the charged battery capacity of the battery body at the next moment after the current moment, and obtaining a power deviation value between the current battery capacity and the charged battery capacity; After determining that the capacity of the charged battery is less than a preset maximum charging threshold of the battery, proportionally controlling the power deviation value according to a preset proportional control algorithm to obtain a large charging current, adjusting the charging current sent by the mains power supply to the battery body to the large charging current, and charging the battery body; When the actual battery capacity of the charged battery body reaches the maximum battery charging threshold, the charging current is adjusted to a preset constant voltage low current to charge the battery body, so as to maintain the actual battery capacity at the maximum battery charging threshold at all times.

8. A wind turbine battery energy efficiency management device, characterized in that: The wind turbine battery energy efficiency management device comprises: An acquisition module is used to obtain the power demand of the user load when the user load is supplied by the mains power supply; The power supply module is used to determine a battery discharge strategy according to the power demand and the current battery capacity of the battery body at the current moment, and to supply power to the user load according to the battery discharge strategy.

9. A wind power generation system, characterized in that: The wind power generation system includes a memory, a processor, and a wind turbine battery energy efficiency management program stored in the memory and executable on the processor. When the processor executes the wind turbine battery energy efficiency management program, the steps of the wind turbine battery energy efficiency management method as described in any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a wind turbine battery energy efficiency management program, and when the wind turbine battery energy efficiency management program is executed by the processor, the steps of the wind turbine battery energy efficiency management method according to any one of claims 1 to 7 are implemented.

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