Novel energy storage photovoltaic power station control method and control system thereof

Abstract

The invention relates to the technical field of photovoltaic energy storage power station control, in particular to a novel energy storage photovoltaic power station control method and system, and the method comprises the steps: obtaining target parameters and standard parameters corresponding to different energy storage batteries in a target battery pack; obtaining a parameter difference value based on the target parameter and the standard parameter; judging whether the parameter difference value exceeds a preset difference value threshold value or not; if the parameter difference value does not exceed a preset difference value threshold value, performing charging and discharging operation on the target battery pack based on a preset control rule; if the parameter difference value exceeds a preset difference value threshold value, obtaining an abnormal parameter; obtaining a target processing scheme based on the abnormal parameters; and carrying out charging and discharging operation on the target battery pack based on a preset control rule and the target processing scheme. The service life of the energy storage system can be prolonged.

Description

Technical Field

[0001] The present application relates to the field of photovoltaic energy storage power station control technology, and in particular to a novel energy storage photovoltaic power station control method and control system thereof. Background Art

[0002] As the global demand for clean energy grows, energy storage photovoltaic power stations, as an important distributed energy system, have been widely used. However, the existing energy storage photovoltaic power station control methods still have many shortcomings in dealing with complex and changing lighting conditions, load demands, and the coordinated operation of energy storage systems and photovoltaic power generation systems.

[0003] Traditional energy storage systems often fail to fully consider the battery life and performance optimization when charging through light or discharging after charging. The energy storage battery is overcharged or over-discharged for a long time, which seriously reduces the service life of the energy storage battery and ultimately affects the long-term reliability and economy of the energy storage system. Therefore, there is an urgent need for a more intelligent, efficient and stable energy storage photovoltaic power station control method to regulate the charging and discharging of energy storage batteries to extend the life of the energy storage system. Summary of the invention

[0004] In order to help extend the life of an energy storage system, the present application provides a novel energy storage photovoltaic power station control method and control system thereof.

[0005] In the first aspect, the present application provides a novel energy storage photovoltaic power station control method, which adopts the following technical solution: A novel energy storage photovoltaic power station control method, comprising: Obtain target parameters and standard parameters corresponding to different energy storage batteries in the target battery pack; Based on the target parameter and the standard parameter, obtaining a parameter difference; Determining whether the parameter difference exceeds a preset difference threshold; If the parameter difference does not exceed the preset difference threshold, charging and discharging the target battery pack is performed based on a preset control rule; If the parameter difference exceeds the preset difference threshold, obtaining the abnormal parameter; Based on the abnormal parameters, obtaining a target processing solution; Based on the preset control rule and the target processing scheme, the target battery pack is charged and discharged.

[0006] By adopting the above technical solution, the target parameters and standard parameters of different energy storage batteries in the target battery group are first obtained, and then the parameter difference is calculated according to the target parameters and the standard parameters, and it is determined whether the parameter difference exceeds the preset difference threshold. If it does not exceed, it indicates that the gap between the target parameters and the standard parameters of each energy storage battery is relatively small, that is, the performance of each energy storage battery is very balanced, and in the unified charging and discharging process, there will be no overcharge or over-discharge of one or part of the energy storage batteries, so the target battery group can be directly charged and discharged according to the preset control rules; If it exceeds, it indicates that there is a large gap between the target parameters and the standard parameters of the energy storage battery, that is, the performance of each energy storage battery is not very balanced. During the unified charging and discharging process, one or part of the energy storage batteries may be overcharged or over-discharged. Therefore, the target battery group cannot be charged and discharged directly according to the preset control rules. It is necessary to further obtain the abnormal parameters, and then obtain the corresponding target processing solution according to the abnormal parameters. Finally, the target battery group is charged and discharged according to the target processing solution and the preset control rules. According to the actual conditions of different energy storage batteries in the target battery pack, it is judged whether the performance of each energy storage battery is balanced, and then a targeted method is selected to charge and discharge the target battery pack according to the judgment result, which helps to reduce the possibility of overcharging or over-discharging of the energy storage batteries in the target battery pack, and further helps to increase the service life of the energy storage batteries and the energy storage system.

[0007] Optionally, obtaining a target processing solution based on the abnormal parameter includes: Based on the abnormal parameters, obtaining a fault level corresponding to the target battery pack; Determining whether the fault level exceeds a preset level threshold; If the fault level does not exceed the preset level threshold, obtaining a charge cut-off power and a discharge cut-off power based on the standard parameters; Based on the parameter difference, the preset control rule, the charge cut-off power, and the discharge cut-off power, a target processing solution is obtained; If the fault level exceeds the preset level threshold, a target processing solution is obtained based on the fault level and the preset control rule.

[0008] Optionally, the determining whether the fault level exceeds a preset level threshold includes: Get the fault type; Determining whether the fault type is a first specified type; If the fault type is the first specified type, determining that the fault level exceeds the preset level threshold; If the fault type is not the first specified type, obtaining the number of abnormal batteries of the abnormal battery and the total number of batteries corresponding to the target battery group; Based on the number of abnormal batteries and the total number of batteries, obtain an abnormality ratio; Determine whether the abnormal proportion exceeds a first proportion threshold; If the abnormality proportion exceeds the first proportion threshold, it is determined that the fault level exceeds the preset level threshold.

[0009] Optionally, acquiring a target processing solution based on the parameter difference, the preset control rule, the charge cut-off power, and the discharge cut-off power includes: Determining whether the fault type is a second specified type; If the fault type is the second specified type, obtaining a target processing solution based on the parameter difference, the preset control rule, the charging cut-off power, and the discharging cut-off power; If the fault type is not the second specified type, determining whether there is a backup battery; If the backup battery exists, obtaining a target processing solution based on the backup battery and the abnormal battery; If the backup energy storage battery does not exist, a target processing solution is obtained based on the fault level, the fault type and the preset control rules.

[0010] Optionally, if the fault type is the second specified type, obtaining a target processing solution based on the parameter difference, the preset control rule, the charging cut-off power, and the discharging cut-off power includes: If the fault type is the second specified type, obtaining the current mode; If the current mode is the charging mode, obtaining a target processing solution based on the charging cut-off power, the parameter difference and the preset control rule; If the current mode is the discharge mode, a target processing solution is obtained based on the discharge cut-off power, the parameter difference and the preset control rule.

[0011] Optionally, if the abnormality proportion exceeds the first proportion threshold, determining that the fault level exceeds the preset level threshold includes: If the abnormal proportion exceeds the first proportion threshold, determining whether the abnormal proportion exceeds the anti-unification proportion; If the abnormal proportion does not exceed the anti-unity proportion, it is determined that the fault level exceeds the preset level threshold; If the abnormal proportion exceeds the anti-unified proportion, mark it and obtain the number of marks; Determine whether the marking number exceeds a preset number threshold; If the marking times do not exceed the preset times threshold, it is determined that the fault level does not exceed the preset level threshold; If the marking times exceed the preset times threshold, it is determined that the fault level exceeds the preset level threshold.

[0012] Optionally, if the abnormal proportion exceeds the anti-uniform proportion, marking is performed, and obtaining the number of markings includes: If the abnormal proportion exceeds the anti-uniform proportion, determining whether the fault types of the abnormal batteries are all of the same type; If the fault types are all of the same type, mark them and obtain the current marking times; If the fault types are not of the same type, then the fault proportions corresponding to the different fault types are obtained; Based on the fault proportion, obtaining a target fault proportion; Determine whether the target fault ratio exceeds a second ratio threshold; If the target fault ratio exceeds the second ratio threshold, marking is performed and the current marking times are obtained.

[0013] Optionally, if the parameter difference does not exceed the preset difference threshold, performing a charge and discharge operation on the target battery pack based on a preset control rule includes: If the parameter difference does not exceed the preset difference threshold, obtaining a unit change rate based on the target parameter; Determining whether the unit change rate exceeds a change rate threshold; If the unit change rate exceeds the change rate threshold, determining whether there is a backup battery pack; If the backup battery pack exists, replacing the target battery pack with the backup battery pack; If the unit change rate does not exceed the change rate threshold, the target battery group is charged and discharged based on the preset control rule.

[0014] In the second aspect, the present application also discloses a novel energy storage photovoltaic power station control system, which adopts the following technical solution: A new energy storage photovoltaic power station control system, including: A first acquisition module is used to acquire target parameters and standard parameters corresponding to different energy storage batteries in a target battery pack; A second acquisition module, used for acquiring a parameter difference based on the target parameter and the standard parameter; A judging module, used to judge whether the parameter difference exceeds a preset difference threshold; a first execution module, configured to perform a charge and discharge operation on the target battery pack based on a preset control rule if the parameter difference does not exceed the preset difference threshold; A third acquisition module, if the parameter difference exceeds the preset difference threshold, the third acquisition module is used to acquire the abnormal parameter; A fourth acquisition module, used for acquiring a target processing solution based on the abnormal parameters; The second execution module is used to perform charging and discharging operations on the target battery pack based on the preset control rule and the target processing solution.

[0015] By adopting the above technical solution, the target parameters and standard parameters of different energy storage batteries in the target battery group are first obtained, and then the parameter difference is calculated according to the target parameters and the standard parameters, and it is determined whether the parameter difference exceeds the preset difference threshold. If it does not exceed, it indicates that the gap between the target parameters and the standard parameters of each energy storage battery is relatively small, that is, the performance of each energy storage battery is very balanced, and in the unified charging and discharging process, there will be no overcharge or over-discharge of one or part of the energy storage batteries, so the target battery group can be directly charged and discharged according to the preset control rules; If it exceeds, it indicates that there is a large gap between the target parameters and the standard parameters of the energy storage battery, that is, the performance of each energy storage battery is not very balanced. During the unified charging and discharging process, one or part of the energy storage batteries may be overcharged or over-discharged. Therefore, the target battery group cannot be charged and discharged directly according to the preset control rules. It is necessary to further obtain the abnormal parameters, and then obtain the corresponding target processing solution according to the abnormal parameters. Finally, the target battery group is charged and discharged according to the target processing solution and the preset control rules. According to the actual conditions of different energy storage batteries in the target battery pack, it is judged whether the performance of each energy storage battery is balanced, and then a targeted method is selected to charge and discharge the target battery pack according to the judgment result, which helps to reduce the possibility of overcharging or over-discharging of the energy storage batteries in the target battery pack, and further helps to increase the service life of the energy storage batteries and the energy storage system.

[0016] In summary, this application includes the following beneficial technical effects: According to the actual conditions of different energy storage batteries in the target battery pack, it is judged whether the performance of each energy storage battery is balanced, and then a targeted method is selected to charge and discharge the target battery pack according to the judgment result, which helps to reduce the possibility of overcharging or over-discharging of the energy storage batteries in the target battery pack, and further helps to increase the service life of the energy storage batteries and the energy storage system. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a main flow chart of a novel energy storage photovoltaic power station control method according to an embodiment of the present application; Figure 2 is a flowchart of steps S201 to S205; Figure 3 is a flowchart of steps S301 to S307; Figure 4 is a flowchart of steps S401 to S405; Figure 5 is a flowchart of steps S501 to S503; Figure 6 is a flowchart of steps S601 to S606; Figure 7 is a flowchart of steps S701 to S706; Figure 8 is a step flow chart from step S801 to step S805; Fig. 9 It is a module diagram of a new energy storage photovoltaic power station control system in an embodiment of the present application.

[0018] Description of reference numerals: 1. First acquisition module; 2. Second acquisition module; 3. Judgment module; 4. First execution module; 5. Third acquisition module; 6. Fourth acquisition module; 7. Second execution module. DETAILED DESCRIPTION

[0019] In a first aspect, the present application discloses a novel energy storage photovoltaic power station control method.

[0020] Reference Figure 1 , a novel energy storage photovoltaic power station control method, comprising steps S101 to S107: Step S101: Obtain target parameters and standard parameters corresponding to different energy storage batteries in a target battery group.

[0021] Specifically, the target battery pack is a battery pack that is being charged or discharged. A battery pack includes multiple energy storage batteries, and the energy storage batteries are connected in series. The target parameters are real-time parameters of the energy storage batteries, including real-time voltage, real-time temperature, real-time power, and real-time battery capacity. The standard parameters are pre-set parameters for selecting energy storage batteries, that is, when selecting energy storage batteries in the target battery pack, the standard parameters are used as selection criteria. In this embodiment, the standard parameters correspond to the target parameters one by one.

[0022] Step S102: Obtain parameter difference based on the target parameter and the standard parameter.

[0023] Specifically, the parameter difference is the difference between the standard parameter and the target parameter. In this embodiment, since the standard parameters and the target parameters include a large number of types, when calculating the parameter difference, it is necessary to calculate one by one according to the different types. For example, the parameter difference includes the voltage difference and the battery capacity difference, etc. The voltage difference is the difference obtained by subtracting the target voltage from the standard voltage, and the battery capacity difference is the difference obtained by subtracting the target battery capacity from the standard battery capacity.

[0024] Step S103: determine whether the parameter difference exceeds a preset difference threshold.

[0025] Specifically, the preset difference threshold is a pre-set judgment standard for determining whether the parameter difference is too large. In this embodiment, the preset parameter threshold varies according to the types of different parameters. For example, the preset difference threshold corresponding to the voltage difference may be 0.2V, and the preset difference threshold corresponding to the battery capacity difference may be 5% of the standard parameter, etc. The preset difference threshold may also be set according to actual conditions or user needs.

[0026] Step S104: If the parameter difference does not exceed the preset difference threshold, charging and discharging operations are performed on the target battery pack based on the preset control rule.

[0027] Specifically, in this embodiment, the preset control rule is a pre-set standard for performing relevant operations on the target battery pack according to different situations.

[0028] Step S105: If the parameter difference exceeds a preset difference threshold, abnormal parameters are obtained.

[0029] Specifically, in this embodiment, the abnormal parameter is a parameter whose parameter difference exceeds a preset difference threshold, including the type and value of the parameter and the size of the parameter difference.

[0030] Step S106: Based on the abnormal parameters, a target processing solution is obtained.

[0031] Specifically, in this embodiment, the target processing solution is the solution finally adopted to perform relevant operations on the target battery pack.

[0032] Step S107: Based on the preset control rules and the target processing scheme, charge and discharge operations are performed on the target battery pack.

[0033] The novel energy storage photovoltaic power station control method provided in this embodiment first obtains the target parameters and standard parameters of different energy storage batteries in the target battery group, then calculates the parameter difference according to the target parameters and the standard parameters, and determines whether the parameter difference exceeds the preset difference threshold. If not, it indicates that the gap between the target parameters and the standard parameters of each energy storage battery is relatively small, that is, the performance of each energy storage battery is very balanced, and in the unified charging and discharging process, there will be no overcharge or over-discharge of one or part of the energy storage batteries. Therefore, the target battery group can be directly charged and discharged according to the preset control rules.

[0034] If it exceeds, it indicates that there is a large gap between the target parameters and the standard parameters of the energy storage battery, that is, the performance of each energy storage battery is not very balanced. During the unified charging and discharging process, one or part of the energy storage batteries may be overcharged or over-discharged. Therefore, the target battery group cannot be charged and discharged directly according to the preset control rules. It is necessary to further obtain the abnormal parameters, and then obtain the corresponding target processing plan based on the abnormal parameters. Finally, the target battery group is charged and discharged according to the target processing plan and the preset control rules.

[0035] According to the actual conditions of different energy storage batteries in the target battery pack, it is judged whether the performance of each energy storage battery is balanced, and then a targeted method is selected to charge and discharge the target battery pack according to the judgment result, which helps to reduce the possibility of overcharging or over-discharging of the energy storage batteries in the target battery pack, and further helps to increase the service life of the energy storage batteries and the energy storage system.

[0036] Reference Figure 2 In one implementation of this embodiment, step S106 obtains a target processing solution based on the abnormal parameters, including steps S201 to S205: Step S201: based on the abnormal parameters, obtaining the fault level corresponding to the target battery pack.

[0037] Specifically, the fault level is the level of the fault corresponding to the target battery pack. The fault level is related to the abnormal parameters. In this embodiment, the correspondence between the abnormal parameters and the fault level is pre-set, and the corresponding fault level can be directly matched according to the abnormal parameters. The fault level can be set from level one to level five, where level one corresponds to the lowest severity and level five corresponds to the highest severity.

[0038] Step S202: Determine whether the fault level exceeds a preset level threshold.

[0039] Specifically, the preset level threshold is a pre-set criterion for determining whether the fault level is too high. In this embodiment, the preset level threshold can be set to three levels.

[0040] Step S203: If the fault level does not exceed the preset level threshold, the charge cut-off power level and the discharge cut-off power level are obtained based on standard parameters.

[0041] Specifically, the charge cut-off power is the power value at which charging stops. When the power of the energy storage battery reaches the charge cut-off power, charging of the energy storage battery is stopped; the discharge cut-off power is the power value at which discharging stops. When the power of the energy storage battery reaches the discharge cut-off power, discharging of the energy storage battery is stopped. In this embodiment, the charge cut-off power and the discharge cut-off power are set according to standard parameters. For example, the charge cut-off power is 90% or 95% of the battery capacity of the energy storage battery, and the discharge cut-off power is 20% or 15% of the battery capacity of the energy storage battery, etc. However, it is worth noting that as the energy storage battery is used, the charge cut-off power and the discharge cut-off power will also change. It changes according to the actual situation. For example, the target battery pack consists of 5 energy storage batteries connected in series. Initially, the target voltage of the 5 energy storage batteries is 3.2V, and the discharge cut-off capacity is 20%. If the target voltage of one of the energy storage batteries becomes 3V due to some reasons, during the charging process, as the charging progresses, the voltage of the energy storage battery with a lower voltage may rise faster under the same charging current. Therefore, the energy storage battery may reach the full charge state first, and may even be overcharged because the charging equipment does not adjust the charging parameters in time. In order to reduce the occurrence of this situation, it is necessary to adjust the charging cut-off capacity of all energy storage batteries in the entire target battery pack.

[0042] Step S204: Obtain a target processing solution based on the parameter difference, the preset control rule, the charge cut-off power, and the discharge cut-off power.

[0043] Specifically, the target processing scheme in this case can be to adjust the charging cut-off power and the discharging cut-off power according to the parameter difference and the preset control rules. In this embodiment, the corresponding situation can also be matched according to the historical processing data, so as to select the historical processing scheme in the corresponding situation as the target processing scheme for this time.

[0044] It is worth noting that when there are multiple corresponding historical processing solutions for a situation, corresponding solution scores can be generated according to the specific situations of different historical processing solutions, and a suitable historical processing solution can be selected as the target processing solution according to the solution scores.

[0045] Step S205: If the fault level exceeds the preset level threshold, a target processing solution is obtained based on the fault level and preset control rules.

[0046] Specifically, in this embodiment, if the fault level exceeds the preset level threshold, it indicates that the fault in the target battery pack is relatively serious and therefore cannot continue to be used normally. The corresponding target processing solution can be matched according to the specific severity and preset control rules, such as stopping the charging and discharging function of the target battery pack or replacing the battery pack.

[0047] The novel energy storage photovoltaic power station control method provided in this embodiment selects a corresponding method to generate a target processing solution according to different situations, thereby helping the target processing solution to better solve the problem corresponding to the current situation, thereby helping to increase the service life of the energy storage battery.

[0048] Reference Figure 3 In one implementation of this embodiment, step S202 determines whether the fault level exceeds the preset level threshold, including steps S301 to S307: Step S301: Obtain the fault type.

[0049] Specifically, in this embodiment, the fault type, i.e., the type of fault existing in the energy storage battery, includes a first specified type, a second specified type, and a third specified type, wherein the first specified type is a fault with a very high severity, such as an open circuit or a short circuit in the energy storage battery and a battery pack leakage, etc. The second specified type is a type in which a parameter difference corresponding to the battery capacity of the energy storage battery exceeds a corresponding preset difference threshold, and a parameter difference corresponding to the voltage exceeds a corresponding preset difference threshold, etc., which may cause overcharging or over-discharging of the energy storage battery, and the third specified type is the remaining fault type.

[0050] Step S302: Determine whether the fault type is a first specified type.

[0051] Step S303: If the fault type is the first specified type, determine that the fault level exceeds a preset level threshold.

[0052] Specifically, in this embodiment, if the fault type is the first specified type, it indicates that the fault is very serious, and therefore it is determined that the fault level exceeds the preset level threshold.

[0053] Step S304: If the fault type is not the first specified type, the number of abnormal batteries of the abnormal battery and the total number of batteries corresponding to the target battery group are obtained.

[0054] Specifically, in this embodiment, the number of abnormal batteries is the number of energy storage batteries corresponding to the abnormal parameters, that is, the number of energy storage batteries with abnormalities, and the total number of batteries is the number of energy storage batteries in the target battery group.

[0055] Step S305: Based on the number of abnormal batteries and the total number of batteries, obtain the abnormality ratio.

[0056] Specifically, in this embodiment, the abnormality ratio is the percentage of the value obtained by dividing the number of abnormalities by the total number of batteries.

[0057] Step S306: Determine whether the abnormality ratio exceeds a first ratio threshold.

[0058] Specifically, the first proportion threshold is a criterion for determining whether the abnormal proportion is too high. In this embodiment, the first proportion threshold may be 5% or other values.

[0059] Step S307: If the abnormality ratio exceeds the first ratio threshold, it is determined that the fault level exceeds the preset level threshold.

[0060] Specifically, in this embodiment, if the abnormality ratio exceeds the first ratio threshold, it indicates that there are multiple energy storage batteries in the target battery pack that are abnormal, and therefore it is determined that the fault level exceeds the preset level threshold.

[0061] The novel energy storage photovoltaic power station control method provided by the present embodiment first determines whether the fault type is the first specified type. If so, it directly determines that the fault level exceeds the preset level threshold. If not, it further determines whether the abnormality ratio exceeds the first ratio threshold, and finally determines whether the fault level exceeds the preset level threshold based on the judgment result. By setting a double judgment, corresponding conclusions are generated according to different judgment results, which helps to improve the accuracy of the conclusions, thereby indirectly improving the service life of the energy storage battery.

[0062] Reference Figure 4 In one implementation of this embodiment, step S204 obtains the target processing scheme based on the parameter difference, the preset control rule, the charge cut-off power, and the discharge cut-off power, including steps S401 to S405: Step S401: Determine whether the fault type is a second specified type.

[0063] Step S402: If the fault type is the second specified type, a target processing solution is obtained based on the parameter difference, the preset control rule, the charge cut-off power, and the discharge cut-off power.

[0064] Specifically, in this embodiment, if the fault type is the second specified type, the target processing scheme in this case may be to adjust the charge cut-off power and the discharge cut-off power according to the parameter difference and the preset control rule.

[0065] Step S403: If the fault type is not the second specified type, determine whether there is a backup battery.

[0066] Step S404: If there is a backup battery, a target processing solution is obtained based on the backup battery and the abnormal battery.

[0067] Specifically, in this embodiment, if there is a spare battery, the spare battery will replace the abnormal battery.

[0068] Step S405: If there is no backup energy storage battery, a target processing solution is obtained based on the fault level, fault type and preset control rules.

[0069] Specifically, in this embodiment, if there is no backup energy storage battery, the abnormal battery cannot be replaced by the backup battery. Therefore, the corresponding target processing solution can be matched according to the specific severity and preset control rules, or the corresponding target processing solution can be matched according to the historical processing solution, etc.

[0070] The novel energy storage photovoltaic power station control method provided in this embodiment first determines whether the fault type is the second specified type. If so, a target processing solution is obtained according to the parameter difference, the preset control rule, the charging cut-off power, and the discharging cut-off power. If so, a further determination is made as to whether there is a backup battery, and finally a target processing solution is determined according to the determination result. By setting a double judgment, a corresponding target processing solution is selected according to different judgment results, thereby helping to improve the fit of the target processing solution to the current situation, and further helping to improve the service life of the energy storage battery.

[0071] Reference Figure 5 In one implementation of this embodiment, if the fault type is the second specified type in step S402, then based on the parameter difference, the preset control rule, the charge cut-off power, and the discharge cut-off power, obtaining the target processing solution includes steps S501 to S503: Step S501: If the fault type is the second specified type, the current mode is obtained.

[0072] Specifically, in this embodiment, the current mode includes a charging mode and a discharging mode.

[0073] Step S502: If the current mode is the charging mode, a target processing solution is obtained based on the charging cut-off power, the parameter difference and the preset control rules.

[0074] Specifically, in this embodiment, if the current mode is the charging mode, the charging cut-off power is adjusted according to the parameter difference and the preset control rule.

[0075] Step S503: If the current mode is the discharge mode, a target processing solution is obtained based on the discharge cut-off power, the parameter difference and the preset control rule.

[0076] Specifically, in this embodiment, if the current mode is the discharge mode, the discharge cut-off power is adjusted according to the parameter difference and the preset control rule.

[0077] The novel energy storage photovoltaic power station control method provided in this embodiment selects the corresponding target processing scheme according to the current mode, thereby helping to reduce erroneous operations that are not suitable for the current mode and current situation, and further helping to extend the service life of the energy storage system.

[0078] Reference Figure 6 In one implementation of this embodiment, if the abnormality ratio exceeds the first ratio threshold in step S307, determining that the fault level exceeds the preset level threshold includes steps S601 to S606: Step S601: If the abnormality ratio exceeds the first ratio threshold, it is determined whether the abnormality ratio exceeds the anti-unified ratio.

[0079] Specifically, the anti-uniform ratio is preset. In this embodiment, the anti-uniform ratio can be set to 90%. When the abnormal ratio exceeds the anti-uniform ratio, it means that most of the energy storage batteries in the target battery group are abnormal batteries. For example, the target battery group is composed of 10 energy storage batteries connected in series. The initial battery capacity of the 10 energy storage batteries is 10Ah, and the battery capacity of 9 of them is changed from 10Ah to 8Ah. Then, by adjusting the standard parameters, the standard parameters corresponding to the battery capacity can be adjusted to 8Ah, so the 9 abnormal batteries are converted into normal batteries, and the normal energy storage batteries are converted into abnormal batteries, so the number of abnormal batteries is reduced from 9 to 1.

[0080] Step S602: If the abnormal proportion does not exceed the anti-unity proportion, it is determined that the fault level exceeds the preset level threshold.

[0081] Specifically, in this embodiment, if the abnormal proportion does not exceed the anti-unified proportion, it means that the properties of the abnormal battery and the normal energy storage battery cannot be changed by adjusting the standard parameters, and the abnormal proportion is relatively high, so it is determined that the fault level exceeds the preset level threshold.

[0082] Step S603: If the abnormal proportion exceeds the anti-uniform proportion, mark it and obtain the number of marking times.

[0083] Specifically, in this embodiment, if the abnormal proportion exceeds the anti-uniform proportion, it means that the properties of abnormal batteries and normal energy storage batteries can be transformed by adjusting the standard parameters. However, in order to prevent the battery performance from failing to meet the corresponding requirements due to excessive number of transformations, the number of transformations needs to be limited. Therefore, the number of marks is increased after each transformation.

[0084] Step S604: Determine whether the number of marking times exceeds a preset number threshold.

[0085] Specifically, in this embodiment, the preset times threshold is the preset maximum times that the properties of the abnormal battery and the normal energy storage battery are allowed to be changed.

[0086] Step S605: If the number of markings does not exceed the preset number threshold, it is determined that the fault level does not exceed the preset level threshold.

[0087] Step S606: If the number of markings exceeds the preset number threshold, it is determined that the fault level exceeds the preset level threshold.

[0088] The novel energy storage photovoltaic power station control method provided in this embodiment determines whether the abnormal proportion exceeds the anti-unified proportion, and determines whether the properties of the abnormal battery and the normal energy storage battery can be transformed. If exceeded, it further determines whether the marking times exceed the preset times threshold, and finally determines whether the fault level exceeds the preset level threshold.

[0089] Reference Figure 7 In one implementation of this embodiment, if the abnormal proportion exceeds the anti-uniform proportion, step S603 is marked, and obtaining the number of markings includes steps S701 to S706: Step S701: If the abnormal proportion exceeds the anti-uniform proportion, it is determined whether the fault types of the abnormal batteries are all of the same type.

[0090] Step S702: If the fault types are all of the same type, mark them and obtain the current marking times.

[0091] Step S703: If the fault types are not of the same type, the fault proportions corresponding to the different fault types are obtained.

[0092] Specifically, in this embodiment, the fault proportion is the proportion corresponding to different fault types.

[0093] Step S704: Based on the fault proportion, obtain a target fault proportion.

[0094] Specifically, in this embodiment, the target fault ratio is the maximum fault ratio.

[0095] Step S705: Determine whether the target fault ratio exceeds a second ratio threshold.

[0096] Specifically, in this embodiment, the second proportion threshold is a pre-set judgment standard for judging whether the target fault proportion is too large.

[0097] Step S706: If the target fault ratio exceeds the second ratio threshold, mark it and obtain the current marking times.

[0098] Specifically, in this embodiment, if the target fault proportion exceeds the second proportion threshold, it indicates that the value of the target fault proportion is large, that is, the fault type corresponding to the target fault proportion occupies a major position among all faults, so this situation can be regarded as the same type of fault types.

[0099] The novel energy storage photovoltaic power station control method provided by the present embodiment does not mark all cases when the abnormal proportion exceeds the anti-unified proportion. It is necessary to first determine whether the fault types of the abnormal batteries are all of the same type. If so, mark them directly and obtain the current marking times. If not, further determine whether the target fault proportion exceeds the second proportion threshold. If so, mark them. Through double judgment, the conditions for marking are limited, which helps to improve the accuracy and rigor of the data, thereby improving the accuracy of the marking times.

[0100] Reference Figure 8 In one implementation of this embodiment, if the parameter difference does not exceed the preset difference threshold in step S104, then based on the preset control rule, the target battery pack is charged and discharged, including steps S801 to S805: Step S801: If the parameter difference does not exceed the preset difference threshold, the unit change rate is obtained based on the target parameter.

[0101] Specifically, the unit change rate is the change rate of the target parameter within a unit time. In this embodiment, the type of the target change rate corresponds to the type of the target parameter one by one, and the unit time may be 1 minute or other time.

[0102] Step S802: Determine whether the unit change rate exceeds the change rate threshold.

[0103] Specifically, in this embodiment, the change rate threshold is a pre-set criterion for determining whether the unit change rate is too large.

[0104] Step S803: If the unit change rate exceeds the change rate threshold, determine whether there is a backup battery pack.

[0105] Step S804: If there is a spare battery pack, the spare battery pack replaces the target battery pack.

[0106] Step S805: If the unit change rate does not exceed the change rate threshold, the target battery pack is charged and discharged based on a preset control rule.

[0107] Specifically, in this embodiment, if the unit change rate does not exceed the change rate threshold, it indicates that the energy storage battery is normal, and thus normal charging and discharging operations can be performed on it according to the preset control rules.

[0108] The novel energy storage photovoltaic power station control method provided in this embodiment further determines whether the unit change rate exceeds the change rate threshold when the parameter difference does not exceed the preset difference threshold, thereby improving the requirements for normal charging and discharging, and helping to reduce the occurrence of a reduction in the life of the energy storage battery due to incorrect charging and discharging.

[0109] In a second aspect, the present application also discloses a novel energy storage photovoltaic power station control system.

[0110] Reference Fig. 9 , a new energy storage photovoltaic power station control system, including: A first acquisition module is used to acquire target parameters and standard parameters corresponding to different energy storage batteries in a target battery pack; A second acquisition module is used to acquire a parameter difference based on the target parameter and the standard parameter; A judgment module is used to judge whether the parameter difference exceeds a preset difference threshold; A first execution module, if the parameter difference does not exceed a preset difference threshold, the first execution module is used to perform a charge and discharge operation on the target battery pack based on a preset control rule; A third acquisition module, if the parameter difference exceeds a preset difference threshold, the third acquisition module is used to obtain abnormal parameters; A fourth acquisition module is used to acquire a target processing solution based on the abnormal parameters; The second execution module is used to perform charging and discharging operations on the target battery pack based on preset control rules and a target processing solution.

[0111] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A novel energy storage photovoltaic power station control method, characterized in that: include: Obtain target parameters and standard parameters corresponding to different energy storage batteries in the target battery pack; Based on the target parameter and the standard parameter, obtaining a parameter difference; Determining whether the parameter difference exceeds a preset difference threshold; If the parameter difference does not exceed the preset difference threshold, charging and discharging the target battery pack is performed based on a preset control rule; If the parameter difference exceeds the preset difference threshold, obtaining the abnormal parameter; Based on the abnormal parameters, obtaining a target processing solution; Based on the preset control rule and the target processing scheme, the target battery pack is charged and discharged.

2. A novel energy storage photovoltaic power station control method according to claim 1, characterized in that: The acquiring of a target processing solution based on the abnormal parameters includes: Based on the abnormal parameters, obtaining a fault level corresponding to the target battery pack; Determining whether the fault level exceeds a preset level threshold; If the fault level does not exceed the preset level threshold, obtaining a charge cut-off power and a discharge cut-off power based on the standard parameters; Based on the parameter difference, the preset control rule, the charge cut-off power, and the discharge cut-off power, a target processing solution is obtained; If the fault level exceeds the preset level threshold, a target processing solution is obtained based on the fault level and the preset control rule.

3. A novel energy storage photovoltaic power station control method according to claim 2, characterized in that: The determining whether the fault level exceeds a preset level threshold comprises: Get the fault type; Determining whether the fault type is a first specified type; If the fault type is the first specified type, determining that the fault level exceeds the preset level threshold; If the fault type is not the first specified type, obtaining the number of abnormal batteries of the abnormal battery and the total number of batteries corresponding to the target battery group; Based on the number of abnormal batteries and the total number of batteries, obtain an abnormality ratio; Determine whether the abnormal proportion exceeds a first proportion threshold; If the abnormality proportion exceeds the first proportion threshold, it is determined that the fault level exceeds the preset level threshold.

4. A novel energy storage photovoltaic power station control method according to claim 2, characterized in that: The acquiring of a target processing solution based on the parameter difference, the preset control rule, the charge cut-off power, and the discharge cut-off power includes: Determining whether the fault type is a second specified type; If the fault type is the second specified type, obtaining a target processing solution based on the parameter difference, the preset control rule, the charging cut-off power, and the discharging cut-off power; If the fault type is not the second specified type, determining whether there is a backup battery; If the backup battery exists, obtaining a target processing solution based on the backup battery and the abnormal battery; If the backup energy storage battery does not exist, a target processing solution is obtained based on the fault level, the fault type and the preset control rules.

5. A novel energy storage photovoltaic power station control method according to claim 4, characterized in that: If the fault type is the second specified type, obtaining a target processing solution based on the parameter difference, the preset control rule, the charging cut-off power, and the discharging cut-off power includes: If the fault type is the second specified type, obtaining the current mode; If the current mode is the charging mode, obtaining a target processing solution based on the charging cut-off power, the parameter difference and the preset control rule; If the current mode is the discharge mode, a target processing solution is obtained based on the discharge cut-off power, the parameter difference and the preset control rule.

6. A novel energy storage photovoltaic power station control method according to claim 3, characterized in that: If the abnormality ratio exceeds the first ratio threshold, determining that the fault level exceeds the preset level threshold includes: If the abnormal proportion exceeds the first proportion threshold, determining whether the abnormal proportion exceeds the anti-unification proportion; If the abnormal proportion does not exceed the anti-unity proportion, it is determined that the fault level exceeds the preset level threshold; If the abnormal proportion exceeds the anti-unified proportion, mark it and obtain the number of marks; Determine whether the marking number exceeds a preset number threshold; If the marking times do not exceed the preset times threshold, it is determined that the fault level does not exceed the preset level threshold; If the marking times exceed the preset times threshold, it is determined that the fault level exceeds the preset level threshold.

7. A novel energy storage photovoltaic power station control method according to claim 6, characterized in that: If the abnormal proportion exceeds the anti-unified proportion, marking is performed, and the number of markings is obtained, including: If the abnormal proportion exceeds the anti-uniform proportion, determining whether the fault types of the abnormal batteries are all of the same type; If the fault types are all of the same type, mark them and obtain the current marking times; If the fault types are not of the same type, then the fault proportions corresponding to the different fault types are obtained; Based on the fault proportion, obtaining a target fault proportion; Determine whether the target fault ratio exceeds a second ratio threshold; If the target fault ratio exceeds the second ratio threshold, marking is performed and the current marking times are obtained.

8. A novel energy storage photovoltaic power station control method according to claim 1, characterized in that: If the parameter difference does not exceed the preset difference threshold, then based on a preset control rule, performing a charge and discharge operation on the target battery pack includes: If the parameter difference does not exceed the preset difference threshold, obtaining a unit change rate based on the target parameter; Determining whether the unit change rate exceeds a change rate threshold; If the unit change rate exceeds the change rate threshold, determining whether there is a backup battery pack; If the backup battery pack exists, replacing the target battery pack with the backup battery pack; If the unit change rate does not exceed the change rate threshold, the target battery group is charged and discharged based on the preset control rule.

9. A new type of energy storage photovoltaic power station control system, characterized in that: include: A first acquisition module is used to acquire target parameters and standard parameters corresponding to different energy storage batteries in a target battery pack; A second acquisition module, used for acquiring a parameter difference based on the target parameter and the standard parameter; A judging module, used to judge whether the parameter difference exceeds a preset difference threshold; a first execution module, configured to perform a charge and discharge operation on the target battery pack based on a preset control rule if the parameter difference does not exceed the preset difference threshold; A third acquisition module, if the parameter difference exceeds the preset difference threshold, the third acquisition module is used to acquire the abnormal parameter; A fourth acquisition module, used for acquiring a target processing solution based on the abnormal parameters; The second execution module is used to perform charging and discharging operations on the target battery pack based on the preset control rule and the target processing solution.

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