An energy storage power supply control method and device, an energy storage power supply and a storage medium

Abstract

The application relates to an energy storage power supply control method and device, an energy storage power supply and a storage medium. The method comprises the following steps: obtaining an input power supply signal based on preset input control information; determining a signal update state of the input power supply signal in a target control period; the target control period is an information update period corresponding to the input control information; determining an input power supply type according to the signal update state; the input power supply type comprises photovoltaic cell panel input and power distribution network voltage source input; and controlling a bidirectional direct current to direct current module to perform charging and discharging operation on the energy storage power supply according to the charging and discharging control logic corresponding to the input power supply type. According to the signal update state, the input power supply type connected to the input end of the energy storage power supply can be determined, so that the energy storage power supply only needs to be configured with one input end, the cost is saved, and the internal space occupation of the product is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of energy storage, in particular to an energy storage power supply control method and device, an energy storage power supply and a storage medium. BACKGROUND

[0002] With the continuous development of energy storage technology, photovoltaic energy storage products are also being used more and more widely. In photovoltaic energy storage products, due to the limitations of weather, shading and other factors and application scenarios, the power generation efficiency of photovoltaic panels will be affected, so a charging port of a mains adapter is usually added in the product design process to cooperate with the photovoltaic panel and serve as the product input design. At present, a common photovoltaic energy storage system has two input ports, one of which is a photovoltaic panel and the other of which is a household power distribution network through an adapter power supply and then a direct current input port. Among them, the direct current boost topology controls its own impedance relationship to make the photovoltaic panel of the input port reach the maximum input power, thereby realizing the maximum efficiency utilization of the photovoltaic panel.

[0003] However, for small-power portable photovoltaic energy storage power supplies, multiple input ports will occupy the volume on the device panel, which is not conducive to product design layout and increases the cost of the device. SUMMARY

[0004] To solve the technical problem of how to reduce the cost of an energy storage power supply device, the present application provides an energy storage power supply control method and device, an energy storage power supply and a storage medium.

[0005] In a first aspect, the present application provides an energy storage power supply control method, which comprises:

[0006] Based on preset input control information, an input power supply signal is obtained, and the signal update state of the input power supply signal in a target control period is determined; the target control period is an information update period corresponding to the input control information;

[0007] According to the signal update state, the input power supply type is determined; the input power supply type includes a photovoltaic panel input and a power distribution network voltage source input;

[0008] According to the charge-discharge control logic corresponding to the input power supply type, a bidirectional direct current to direct current module is controlled to perform charge-discharge operation on the energy storage power supply;

[0009] Optionally, before the input power supply signal is obtained based on the preset input control information, the method further comprises:

[0010] A preset adjustment rule of a switching tube is obtained; the switching tube is configured in the bidirectional direct current to direct current module or an isolation boost inverter module;

[0011] According to the preset adjustment rule, the duty cycle of the switch tube is adjusted, and the duty cycle of the switch tube is taken as the input control information.

[0012] According to the preset input control information, an input power signal is obtained.

[0013] The power value of the first end of the power bus at different duty cycles is obtained, and the power value is taken as the input power signal.

[0014] Optionally, according to the signal update state, the input power type is determined, comprising:

[0015] In the case that the signal update state indicates that the input power signal linearly increases in the target control period, the input power type is determined as a power distribution network voltage source input.

[0016] The first power signal corresponding to the maximum value of the input control information is obtained from the input power signal, and the second power signal is obtained from the input power signal, the second power signal being the maximum value of the input power signal in the target control period.

[0017] In the case that the signal update state indicates that the input power signal is positively correlated with the input control information in a preset interval, and the ratio of the first power signal to the second power signal is less than a preset threshold, the input power type is determined as a photovoltaic cell panel input; the preset threshold is less than one and greater than zero; the maximum value of the input control information in the preset interval is less than or equal to the input control information corresponding to the second power signal.

[0018] Optionally, before the bidirectional DC-DC module performs the charging and discharging operation on the energy storage power supply according to the charging and discharging control logic corresponding to the input power type, the method further comprises:

[0019] The first power information of the energy storage battery group in the energy storage unit is obtained.

[0020] The second power information of the output load is obtained; the second power information is less than or equal to the rated output power of the output load.

[0021] The sum of the first power information and the second power information is taken as the output power control information.

[0022] Correspondingly, the bidirectional DC-DC module performs the charging and discharging operation on the energy storage power supply according to the charging and discharging control logic corresponding to the input power type, comprising:

[0023] According to the output power control information and the charge-discharge control logic corresponding to the input power type, the bidirectional DC-DC module is controlled to perform charge-discharge operation on the energy storage power supply.

[0024] Optionally, if the input power type is photovoltaic panel input, the charge-discharge control logic corresponding to the photovoltaic panel input is maximum power point tracking mode, the maximum power point tracking mode is used to track the maximum input power of the photovoltaic panel, and according to the output power control information and the charge-discharge control logic corresponding to the input power type, the bidirectional DC-DC module is controlled to perform charge-discharge operation on the energy storage power supply, including:

[0025] In the case that the power input of the photovoltaic panel corresponding to the power supply is greater than the output power control information, the bidirectional DC-DC module is limited to perform charge-discharge operation on the energy storage power supply;

[0026] In the case that the power input of the photovoltaic panel input is less than or equal to the output power control information, the bidirectional DC-DC module is controlled to perform charge-discharge operation on the energy storage power supply according to the maximum power point tracking mode;

[0027] Optionally, if the input power type is power distribution network voltage source input, the charge-discharge control logic corresponding to the power distribution network voltage source input is voltage source control logic, and according to the output power control information and the charge-discharge control logic corresponding to the input power type, the bidirectional DC-DC module is controlled to perform charge-discharge operation on the energy storage power supply, including:

[0028] According to the voltage source control logic, the power input power corresponding to the power distribution network voltage source is controlled to match the output power control information, and the bidirectional DC-DC module is controlled to perform charge-discharge operation on the energy storage power supply based on the power input power corresponding to the power distribution network voltage source and the output power control information.

[0029] In a second aspect, the present application provides an energy storage power supply control device, which comprises:

[0030] An input power signal acquisition module is configured to acquire an input power signal based on preset input control information, determine a signal update state of the input power signal in a target control period, and determine an information update period corresponding to the input control information as the target control period.

[0031] An input power type determination module is configured to determine an input power type according to the signal update state, and the input power type includes photovoltaic panel input and power distribution network voltage source input.

[0032] The charge-discharge control module is configured to control the bidirectional DC-DC module to perform charge-discharge operation on the energy storage power supply according to charge-discharge control logic corresponding to the input power type.

[0033] In a third aspect, the present application provides an energy storage power supply, comprising: an isolation boost inversion module, a power bus, a controller and at least one set of energy storage units; the energy storage units comprise bidirectional DC-DC modules and energy storage battery groups;

[0034] A first end of the power bus is connected to an input end of the energy storage power supply; the input end of the energy storage power supply is configured to be connected to a photovoltaic cell panel or a power grid voltage source;

[0035] A second end of the power bus is connected to a first end of the bidirectional DC-DC module, and a second end of the bidirectional DC-DC module is connected to the energy storage battery group;

[0036] A third end of the power bus is connected to a first end of the isolation boost inversion module, and a second end of the isolation boost inversion module is configured to be connected to an output load;

[0037] The controller is connected to a control end of the bidirectional DC-DC module to control the bidirectional DC-DC module to perform charge-discharge operation on the energy storage power supply.

[0038] Optionally, the at least one set of energy storage units comprises one master energy storage unit and at least one slave energy storage unit;

[0039] The master energy storage unit comprises a master bidirectional DC-DC module and a master energy storage battery group; and the slave energy storage unit comprises a slave bidirectional DC-DC module and a slave energy storage battery group;

[0040] The master bidirectional DC-DC module and the slave bidirectional DC-DC module are communicatively connected;

[0041] Optionally, the controller is further connected to a control end of the isolation boost inversion module, so that the controller determines the input power type of the input end of the energy storage power supply by controlling the duty cycle of a switch tube in the isolation boost inversion module or the bidirectional DC-DC module;

[0042] Optionally, the input end of the energy storage power supply is connected to a junction box of the photovoltaic cell panel;

[0043] Optionally, the input end of the energy storage power supply is connected to an output end of an isolation step-down rectification module, and an input end of the isolation step-down rectification module is connected to the power grid voltage source;

[0044] Optionally, the isolation boost inversion module comprises an isolation unit and a boost inversion unit;

[0045] The first end of the isolation unit is connected to the third end of the power bus, the second end of the isolation unit is connected to the first end of the boost inversion unit, and the second end of the boost inversion unit is used as the second end of the isolated boost inversion module.

[0046] Optionally, the bidirectional DC-DC module comprises a feedback circuit, a control unit and a boost-buck circuit.

[0047] The first end of the feedback circuit is connected to the second end of the power bus to sample an input voltage.

[0048] The second end of the feedback circuit is connected to the control unit, and the controller controls the boost-buck circuit according to the sampled input voltage through the control unit to perform charging and discharging operations on the energy storage battery pack.

[0049] Optionally, the boost-buck circuit comprises a boost-buck chopper circuit.

[0050] In a fourth aspect, the present application provides a power generator comprising the energy storage power supply of any one of the third aspect.

[0051] In a fifth aspect, the present application provides a power station comprising the energy storage power supply of any one of the third aspect.

[0052] In a sixth aspect, the present application provides an electronic device comprising a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory complete mutual communication through the communication bus.

[0053] The memory is used to store a computer program.

[0054] The processor is used to execute the program stored on the memory to realize the steps of the energy storage power supply control method of any one of the first aspect.

[0055] In a seventh aspect, the present application provides a computer readable storage medium having a computer program stored thereon, wherein the computer program is executed by a processor to realize the steps of the energy storage power supply control method of any one of the first aspect.

[0056] The above technical solutions provided by the embodiments of the present application have the following advantages compared with the prior art:

[0057] The energy storage power supply control method provided by the embodiment of the application comprises: acquiring an input power supply signal based on preset input control information; determining a signal update state of the input power supply signal in a target control period; the target control period is an information update period corresponding to the input control information; determining an input power supply type according to the signal update state; the input power supply type comprises photovoltaic cell panel input and power distribution network voltage source input; and controlling a bidirectional direct current to direct current module to perform charging and discharging operation on the energy storage power supply according to charging and discharging control logic corresponding to the input power supply type. The method can determine the input power supply type connected to the input end of the energy storage power supply according to the signal update state, thereby providing the possibility that only one input end needs to be configured for the energy storage power supply, saving the cost and reducing the occupation of the internal space of the product. BRIEF DESCRIPTION OF DRAWINGS

[0058] The accompanying drawings, which are incorporated herein and constitute part of the specification, illustrate embodiments consistent with the application and, together with the description, serve to explain the principles of the application.

[0059] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the accompanying drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, for those skilled in the art, other drawings can also be obtained based on these drawings without creative labor.

[0060] Figure 1 A structural schematic diagram of an energy storage power supply provided by an embodiment of the application is shown in the figure.

[0061] Figure 2 A structural schematic diagram of an energy storage power supply provided by another embodiment of the application is shown in the figure.

[0062] Figure 3 A flowchart of an energy storage power supply control method provided by an embodiment of the application is shown in the figure.

[0063] Figure 4 A structural schematic diagram of an energy storage power supply control device provided by an embodiment of the application is shown in the figure.

[0064] Figure 5 A structural schematic diagram of an electronic device provided by an embodiment of the application is shown in the figure.

[0065] The reference signs are as follows:

[0066] 10-energy storage unit; 11-controller; 12-power bus; 13-isolation boost inversion module;

[0067] 101-bidirectional direct current to direct current module; 102-energy storage battery pack.

[0068] 201 - photovoltaic panel; 202 - power grid voltage source; 203 - isolated step-down rectifier module; 204 - output load. DETAILED DESCRIPTION

[0069] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the following will be combined with the accompanying drawings for the embodiments of the present application to make a clear and complete description of the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0070] The first embodiment of the present application provides a kind of energy storage power supply, such as Figure 1 Including: isolated step-up inverter module 13, power bus 12, controller 11 and at least one set of energy storage unit 10, energy storage unit 10 includes bidirectional DC-DC module 101 and energy storage battery group 102.

[0071] The first end of power bus 12 is connected to the input end of energy storage power supply, the input end of energy storage power supply is used to connect photovoltaic panel 201 or power grid voltage source 202, the second end of power bus 12 is connected to the first end of bidirectional DC-DC module 101, the second end of bidirectional DC-DC module 101 is connected to energy storage battery group 102, the third end of power bus 12 is connected to the first end of isolated step-up inverter module 13, the second end of isolated step-up inverter module 13 is used to connect output load 204, controller 11 is connected to the control end of bidirectional DC-DC module 101, to control bidirectional DC-DC module to perform charge-discharge operation to energy storage power supply.

[0072] Power grid voltage source 202, that is, mains, since the scenario that energy storage power supply uses mains and photovoltaic panel simultaneously almost does not exist, in the embodiment, the input port of energy storage power supply equipment is reduced from two ports to one port, connected to the front end of power bus Bus, used by power grid voltage source 202 and photovoltaic panel 201 two power sources, can be connected photovoltaic panel 201 or power grid voltage source 202 according to need, reduce a port of energy storage power supply equipment, reduce the cost of input port, and make the layout of the panel of energy storage power supply equipment more flexible.In addition, the function of controlling the input power of photovoltaic panel 201 is realized by the controller controlling bidirectional DC-DC module 101, and the DC step-up topology connected by the port of photovoltaic panel 201 is omitted, saving the internal space of the equipment and reducing the cost.

[0073] In the embodiment, the controller 11 can control the energy storage power supply to be in the charging mode or the discharging mode to perform the charging and discharging operation according to the control on the bidirectional DC-DC module 101, and control the input power in the charging mode and the output power in the discharging mode. Of course, the controller 11 can also determine whether the input port is connected to the photovoltaic cell panel 201 or the power distribution network voltage source 202 according to the control on the bidirectional DC-DC module 101, and the specific control method is described in detail in the method embodiment.

[0074] It should be noted that when the input power type is the power distribution network voltage source input, the input end of the energy storage power supply is connected to the output end of the isolation voltage reduction rectification module, and the input end of the isolation voltage reduction rectification module is connected to the power distribution network voltage source. When the input power type is the photovoltaic cell panel input, the input end of the energy storage power supply is connected to the junction box of the photovoltaic cell panel.

[0075] It should be understood that the embodiment reduces one output port and one DC voltage boosting topology of the energy storage power supply, thereby reducing the device failure probability and improving the reliability of the energy storage power supply.

[0076] In one embodiment, as Figure 2 At least one group of energy storage units includes a master energy storage unit and at least one slave energy storage unit. The master energy storage unit includes a master bidirectional DC-DC module and a master energy storage battery pack, and the slave energy storage unit includes a slave bidirectional DC-DC module and a slave energy storage battery pack. The master bidirectional DC-DC module and the slave bidirectional DC-DC module are in communication connection.

[0077] In the embodiment, the energy storage unit can be two, three or more, for example, one master energy storage unit and one slave energy storage unit are taken as an example.

[0078] The master bidirectional DC-DC module and the slave bidirectional DC-DC module are in communication connection, which can increase the energy storage expansion function of the device, improve the energy storage level of the energy storage power supply, and when one of the energy storage units fails, the energy storage power supply can still be used normally, thereby reducing the failure rate.

[0079] In the embodiment, the energy storage distribution of the master energy storage battery pack and the slave energy storage battery pack can be controlled by the controller, which can be realized by controlling the input power or the output power of the master bidirectional DC-DC module and / or the input power or the output power of the slave bidirectional DC-DC module, without limitation.

[0080] In one embodiment, the controller 11 is also connected to the control end of the isolation voltage boosting inversion module 13, so that the controller 11 determines the input power type of the input end of the energy storage power supply by controlling the duty cycle of the switch tube in the isolation voltage boosting inversion module 13 or the bidirectional DC-DC module 101.

[0081] In this embodiment, the duty cycle of the switch tube in the isolated boost inverter module 13 can be controlled by the controller 11 according to a preset adjustment rule. Different duty cycles correspond to different input powers of the first end of the power bus 12. The input power of the first end of the power bus 12 under each duty cycle can be collected to determine whether the input port of the energy storage power supply is connected to the photovoltaic panel 201 or the power distribution network voltage source 202.

[0082] Of course, the duty cycle of the switch tube in the bidirectional DC-DC module 101 can be controlled in the same way, and details are not repeated here.

[0083] In one embodiment, the isolated boost inverter module includes an isolation unit and a boost inverter unit.

[0084] The connection relationship is as follows: the first end of the isolation unit is connected to the third end of the power bus, the second end of the isolation unit is connected to the first end of the boost inverter unit, and the second end of the boost inverter unit serves as the second end of the isolated boost inverter module.

[0085] In one embodiment, the bidirectional DC-DC module includes a feedback circuit, a control unit, and a boost-buck circuit.

[0086] The connection relationship is as follows: the first end of the feedback circuit is connected to the second end of the power bus to sample the input voltage; the second end of the feedback circuit is connected to the control unit; and the controller controls the boost-buck circuit through the control unit according to the sampled input voltage to perform charging and discharging operations on the energy storage battery pack.

[0087] In this embodiment, the feedback circuit samples the input voltage of the second end of the power bus and controls the boost-buck circuit according to the sampled input voltage to perform charging and discharging operations on the energy storage battery pack. The boost-buck circuit can be a boost-buck chopper circuit.

[0088] Based on the same technical concept, the second embodiment of the present application provides a method for controlling an energy storage power supply. The method can be applied to any of the energy storage power supplies in the first embodiment, such as Figure 3 , the method comprises:

[0089] Step 301: Based on the preset input control information, an input power signal is obtained; the signal update state of the input power signal in a target control period is determined; and the target control period is the information update period corresponding to the input control information.

[0090] The input power signal, i.e., the signal input from the input end of the energy storage power supply, can be collected from the first end of the power bus without limitation.

[0091] In one embodiment, before obtaining the input power signal based on the preset input control information, the method further comprises: obtaining a preset adjustment rule of the switch tube; the switch tube is configured in the bidirectional DC-DC module or the isolated boost inverter module; and the duty cycle of the switch tube is adjusted according to the preset adjustment rule, and the duty cycle of the switch tube is taken as the input control information.

[0092] Correspondingly, based on the preset input control information, the input power signal is obtained by: obtaining the power value of the first end of the power bus at different duty cycles, and taking the power value as the input power signal.

[0093] In this embodiment, the duty cycle of the switch tube in the bidirectional DC-DC module can be adjusted, and the duty cycle of the switch tube in the isolated boost inverter module can also be adjusted, and different switch ratios corresponding to the power values can be obtained at the first end of the power bus.

[0094] In a specific embodiment, the preset adjustment rule can be that the duty cycle of the switch tube is adjusted by a preset step size within a target control period. Specifically, an adjustment interval of the duty cycle can also be set, for example, the duty cycle can start from 0% and increase to 95% by a step size of 1%, and the duty cycle increases from 0% to 95% as a target control period (or also referred to as a cycle), at this time, the adjustment interval of the duty cycle is 0-95%, and the collected power value can be stored in the Inpower_Array array, for example, in the form of a key-value pair, one duty cycle corresponds to one power value, and the control of the switch tube can be stopped after one cycle of collection, or several cycles of data can be collected to reduce errors and improve the accuracy of data analysis.

[0095] Step 302, determining the input power type according to the signal update state; the input power type includes photovoltaic panel input and power grid voltage source input.

[0096] The photovoltaic panel input and the power grid voltage source input have the following characteristics respectively:

[0097] The photovoltaic panel has different output powers corresponding to different output impedances, and the output power increases with the gradual increase of the output impedance, and there is a maximum power peak, and after passing the maximum peak, it begins to gradually decrease.

[0098] The power grid voltage source has a positive correlation between the output power and the output impedance, and the voltage source is protected beyond the maximum impedance.

[0099] In one embodiment, determining the input power type according to the signal update state comprises:

[0100] In the case that the signal update state indicates that the input power signal increases linearly within the target control period, the input power type is determined as the power grid voltage source input.

[0101] If the signal update state indicates that the input power signal is not linearly increasing in the target control period, at least two determination methods are included as follows.

[0102] In the first case, the input power type can be directly determined as photovoltaic panel input.

[0103] In the second case, a first power signal corresponding to the maximum value of the input control information is obtained from the input power signal, and a second power signal is obtained from the input power signal, which is the maximum value of the input power signal in the target control period.

[0104] In the case where the signal update state indicates that the input power signal and the input control information are positively correlated in the preset interval, and the ratio of the first power signal to the second power signal is less than the preset threshold, the input power type is determined as photovoltaic panel input; the preset threshold is less than one and greater than zero; the maximum value of the input control information in the preset interval is less than or equal to the input control information corresponding to the second power signal.

[0105] In this embodiment, the input power signal is taken as an example of power value, and the duty cycle starts from 0% and increases by 1% to 95%. The collected power value can be stored in the Inpower_Array array. When the power value in the array Inpower_Array linearly increases with respect to the duty cycle, the input source is the input of the power grid voltage source.

[0106] If the power value in the array Inpower_Array exceeds the preset interval, the duty cycle continues to increase, the power value reaches the maximum value at the target duty cycle, and then the power value decreases as the duty cycle continues to increase, i.e. the second power signal corresponds to the target duty cycle, and the first power signal corresponds to the maximum value of the duty cycle, which is 95%. At this time, when the power value in the array Inpower_Array increases with the increase of the duty cycle in the preset interval, and the first power signal corresponding to the duty cycle of 95% is less than 90% of the second power signal, the input source is the input of the photovoltaic panel.

[0107] It should be noted that the preset threshold of 90% here is only for example and does not represent a further limitation on the preset threshold. In fact, the preset threshold can be adjusted in advance according to the connected photovoltaic panel, such as 80%, 85%, 95% or other values, without limitation. The preset interval can be set to 10%-50% or 20-60% or other intervals, as long as the maximum value of the preset interval is less than the target duty cycle, and the range of the interval is not limited.

[0108] Step 303, according to the charge and discharge control logic corresponding to the input power type, the bidirectional DC-DC module controls the charge and discharge operation of the energy storage power supply.

[0109] The charging and discharging operation can correspond to a charging mode, a discharging mode and a standby mode (neither charging nor discharging) of the energy storage power supply. In the charging mode, the charging power of the energy storage battery pack and the output power output to the output load through the power bus can be controlled, and in the discharging mode, the discharging power of the energy storage battery pack and the output power output to the output load through the power bus can be controlled.

[0110] In one embodiment, before the bidirectional DC-DC module performs the charging and discharging operation on the energy storage power supply according to the charging and discharging control logic corresponding to the input power type, the method further comprises: obtaining first power information of the energy storage battery pack in the energy storage unit; obtaining second power information of the output load; the second power information is less than or equal to the rated output power of the output load; and taking the sum of the first power information and the second power information as output power control information.

[0111] Correspondingly, controlling the bidirectional DC-DC module to perform the charging and discharging operation on the energy storage power supply according to the charging and discharging control logic corresponding to the input power type comprises: controlling the bidirectional DC-DC module to perform the charging and discharging operation on the energy storage power supply according to the output power control information and the charging and discharging control logic corresponding to the input power type.

[0112] In this embodiment, the first power information of the energy storage battery pack is the maximum input power allowed by the energy storage battery pack during charging, and the second power information of the output load is the actual power of the output load during operation. It should be understood that the actual power of the output load is less than or equal to its rated output power (i.e. rated power), and when the load is not working, the actual power is zero, and the output power control information is the maximum input power allowed by the input end of the energy storage power supply.

[0113] If the input power type is photovoltaic panel input, the charging and discharging control logic corresponding to the photovoltaic panel input is the maximum power point tracking mode, which is used to track the maximum input power of the photovoltaic panel. Controlling the bidirectional DC-DC module to perform the charging and discharging operation on the energy storage power supply according to the output power control information and the charging and discharging control logic corresponding to the input power type comprises:

[0114] In the case that the input power of the photovoltaic panel corresponding to the power supply is greater than the output power control information, the bidirectional DC-DC module is limited to perform the charging and discharging operation on the energy storage power supply;

[0115] In the case that the input power of the photovoltaic panel input is less than or equal to the output power control information, the bidirectional DC-DC module is controlled to perform the charging and discharging operation on the energy storage power supply according to the maximum power point tracking mode.

[0116] The limiting the bidirectional DC-DC module to perform the charging and discharging operation on the energy storage power supply can be controlling the bidirectional DC-DC module to enter a limited power mode, and in the limited power mode, the upper limit of the power input by the photovoltaic panel is the output power control information.

[0117] The maximum power point tracking (MPPT) mode can track the maximum power point of the photovoltaic panel, so that the photovoltaic panel inputs the maximum power to the energy storage power supply.

[0118] If the current input power of the photovoltaic panel is greater than the output power control information, the current input power of the photovoltaic panel can be limited by the MPPT mode to protect the energy storage power supply and the output load, and if the current input power is less than the output power control information, the photovoltaic panel can be controlled to input the maximum power by the MPPT.

[0119] In the embodiment, the following is exemplified:

[0120] For example, the power information (i.e., the first power information) Power_Requestcharge required by the energy storage battery pack to be charged can be obtained by a battery management system (BMS), the output load is detected as Power_Load (0≤Power_Load≤rated output power), and the sum of Power_Requestcharge and Power_Load is the output power control information, that is, the maximum power limit of the input end of the energy storage power supply; the voltage of the power bus Bus can be clamped by the energy storage battery pack, and the input power type is determined according to the input power signal.

[0121] When the input source is the photovoltaic panel, the bidirectional DC-DC module starts to run in the MPPT mode, and when the maximum input power Power_PVMax of the photovoltaic panel MPPT>Power_Requestcharge+Power_Load, the MPPT of the bidirectional DC-DC module enters the limited power mode, that is, the input power of the photovoltaic panel is limited to Power_Requestcharge+Power_Load.

[0122] When the maximum input power Power_PVMax of the photovoltaic panel MPPT≤Power_Requestcharge+Power_Load, the bidirectional DC-DC module runs in the MPPT mode.

[0123] In one embodiment, the energy storage power supply can include at least two groups of energy storage units, and the energy storage power supply includes one master energy storage unit and one slave energy storage unit.

[0124] The power information Power_Requestcharge1 required by the master energy storage battery pack to be charged and the power information Power_Requestcharge2 required by the slave energy storage battery pack to be charged can be obtained by the BMS, and the output load is Power_Load (0≤Power_Load≤rated output power), wherein the sum of Power_Requestcharge1, Power_Requestcharge2 and Power_Load is the output power control information, that is, the maximum power limit of the input end of the energy storage power supply; wherein the voltage of the power bus Bus can be clamped by the master energy storage battery pack and the slave energy storage battery pack together, and the input power type is determined according to the input power signal.

[0125] When the input source is a photovoltaic panel, the bidirectional DC-DC module starts to operate in the MPPT mode, and when the maximum input power Power_PVMax of the photovoltaic panel MPPT>Power_Requestcharge1+Power_Requestcharge2+Power_Load, the MPPT of the bidirectional DC-DC module enters the power limiting mode, that is, the input power of the photovoltaic panel is limited

[0126] =Power_Requestcharge1+Power_Requestcharge2+Power_Load.

[0127] When the maximum input power Power_PVMax of the photovoltaic panel MPPT≤

[0128] Power_Requestcharge1+Power_Requestcharge2+Power_Load, the bidirectional DC-DC module operates in the MPPT mode.

[0129] It should be noted that the energy storage power supply including two energy storage units is only an example, and the energy storage power supply can include one, two, three or more energy storage units, without limitation.

[0130] If the input power type is a power distribution network voltage source input, the charge and discharge control logic corresponding to the power distribution network voltage source input is the voltage source control logic, and according to the output power control information and the charge and discharge control logic corresponding to the input power type, the bidirectional DC-DC module performs charge and discharge operation on the energy storage power supply, including:

[0131] According to the voltage source control logic, the power input and output control information corresponding to the power input of the power distribution network voltage source is matched, and the bidirectional DC-DC module is controlled to perform charging and discharging operation on the energy storage power supply based on the power input and output control information corresponding to the power distribution network voltage source.

[0132] In the embodiment, when the input source is the power distribution network voltage source, the bidirectional DC-DC module limits the input of the power distribution network voltage source according to the sum of Power_Requestcharge and Power_Load.

[0133] Specifically, the voltage input power of the power distribution network voltage source is kept equal to the output power control information.

[0134] When the output load Power_Load changes or the first power information Power_Requestcharge changes, or both change, causing the output power control information to change, the voltage input power of the power distribution network voltage source changes synchronously, so that the voltage input power of the power distribution network voltage source is always equal to the output power control information.

[0135] In the above embodiments, by setting one input and saving one DC boost topology, the generation cost is saved, the internal structure space of the energy storage power supply is saved, the theoretical reliability of the product is increased, the input source type is detected by controlling the duty cycle, which is more accurate than the traditional voltage method, in addition, the energy storage unit can be expanded, which improves the energy storage level of the energy storage power supply and also improves the diversity of the product, and the failure rate can be reduced.

[0136] Based on the same technical concept, the third embodiment of the present application provides a kind of energy storage power supply control device, such as Figure 4 , the device comprises:

[0137] Input power signal acquisition module 401, for obtaining input power signal based on pre-set input control information;Determine the signal update state of the input power signal in target control period;The target control period is the information update period corresponding to the input control information;

[0138] Input power type determination module 402, for determining input power type according to the signal update state;The input power type includes photovoltaic cell panel input and power distribution network voltage source input;

[0139] Charging and discharging control module 403, for controlling bidirectional DC-DC module to perform charging and discharging operation on energy storage power supply according to the charging and discharging control logic corresponding to the input power type.

[0140] As Figure 5As shown, the fourth embodiment of the present application provides an electronic device, comprising a processor 111, a communication interface 112, a memory 113 and a communication bus 114, wherein the processor 111, the communication interface 112 and the memory 113 complete mutual communication through the communication bus 114,

[0141] The memory 113 is used for storing a computer program.

[0142] In one embodiment, the processor 111 is used to execute the program stored in the memory 113, and the energy storage power supply control method provided by any one of the foregoing method embodiments is realized, comprising:

[0143] Based on the preset input control information, an input power signal is acquired, and a signal update state of the input power signal in a target control period is determined; the target control period is an information update period corresponding to the input control information;

[0144] According to the signal update state, an input power type is determined; the input power type includes photovoltaic cell panel input and power distribution network voltage source input;

[0145] According to the charge-discharge control logic corresponding to the input power type, a bidirectional direct current-direct current module is controlled to perform charge-discharge operation on the energy storage power supply.

[0146] The communication bus mentioned above can be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA) bus, etc. The communication bus can be divided into an address bus, a data bus, a control bus, etc. For the convenience of representation, only one thick line is used in the figure, but it does not mean that there is only one bus or only one type of bus.

[0147] The communication interface is used for communication between the terminal and other devices.

[0148] The memory can include a random access memory (RAM) and can also include a non-volatile memory, such as at least one disk memory. Optionally, the memory can also be at least one storage device located away from the foregoing processor.

[0149] The processor described above can be a general processor, including a central processing unit (CPU), a network processor (NP), etc.; can also be a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component.

[0150] The fifth embodiment of the present application further provides a computer readable storage medium, which stores a computer program, and the computer program is executed by a processor to implement the steps of the energy storage power supply control method provided by any one of the preceding method embodiments.

[0151] The sixth embodiment of the present application further provides a generator, which includes any one of the energy storage power supplies in the first embodiment.

[0152] The seventh embodiment of the present application further provides a power station, which includes any one of the energy storage power supplies in the first embodiment.

[0153] In the above embodiments, all or part of the embodiments can be implemented by software, hardware, firmware or any combination thereof. When implemented by software, all or part of the embodiments can be implemented in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of the present application are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network or other programmable device. The computer instructions can be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions can be transmitted from one website, computer, server or data center to another website, computer, server or data center through wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.) mode. The computer readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. integrated with one or more available media. The available medium can be a magnetic medium (for example, floppy disk, hard disk, magnetic tape), an optical medium (for example, DVD), or a semiconductor medium (for example, solid state disk (SSD)) and the like.

[0154] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting. It is also possible in the present disclosure that steps can be executed in different sequence where is graphically or explicitly stated or indicated. Further, some steps can be optional. Moreover, certain features can be used alone or in combination. In the description below, numerous specific details are set forth to provide a thorough understanding of various concepts. However, concepts can be practiced without some or all of these specific details. In other instances, additional or

[0155] It is to be understood that the specific embodiments described herein are only illustrative of the principles of this application and are not to be considered limiting thereof. In the description, relative terms such as "module", "unit" or "section" used to designate elements are used only in the sense of convenience and are not to be construed as indicating a specific meaning. Thus, "module", "unit" or "section" can be used interchangeably.

[0156] The above descriptions are only specific embodiments of the present application to enable those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for controlling an energy storage power source, characterized in that, The method includes: Based on preset input control information, an input power signal is acquired; the signal update status of the input power signal within a target control cycle is determined; the target control cycle is the information update cycle corresponding to the input control information. The input power type is determined based on the signal update status; the input power type includes photovoltaic panel input and power grid voltage source input. According to the charging and discharging control logic corresponding to the input power type, the bidirectional DC to DC module is controlled to perform charging and discharging operations on the energy storage power. The step of determining the input power type based on the signal update state includes: When the signal update state indicates that the input power signal increases linearly within the target control cycle, the input power type is determined to be a distribution network voltage source input; The first power signal corresponding to the maximum value of the input control information is obtained from the input power signal, and the second power signal is obtained from the input power signal, wherein the second power signal is the maximum value of the input power signal within the target control cycle; When the signal update state indicates that the input power signal and the input control information are positively correlated within a preset range, and the ratio of the first power signal to the second power signal is less than a preset threshold, the input power type is determined to be photovoltaic panel input; the preset threshold is less than one and greater than zero; the maximum value of the input control information within the preset range is less than or equal to the input control information corresponding to the second power signal.

2. The method according to claim 1, characterized in that, Before acquiring the input power signal based on preset input control information, the method further includes: Obtain the preset adjustment rules for the switching transistor; the switching transistor is configured in the bidirectional DC-DC converter module or the isolated boost inverter module; The duty cycle of the switching transistor is adjusted according to the preset adjustment rules, and the duty cycle of the switching transistor is used as the input control information. The acquisition of the input power signal based on preset input control information includes: The power value of the first terminal of the power bus at different duty cycles is obtained, and the power value is used as the input power signal.

3. The method according to claim 1, characterized in that, Before controlling the bidirectional DC-to-DC converter to perform charging and discharging operations on the energy storage power supply according to the charging and discharging control logic corresponding to the input power type, the method further includes: Obtain the first power information of the energy storage battery pack in the energy storage unit; Obtain the second power information of the output load; the second power information is less than or equal to the rated output power of the output load; The sum of the first power information and the second power information is used as the output power control information; Accordingly, the step of controlling the bidirectional DC-to-DC converter to perform charging and discharging operations on the energy storage power supply according to the charging and discharging control logic corresponding to the input power type includes: Based on the output power control information and the charging / discharging control logic corresponding to the input power type, the bidirectional DC-to-DC module is controlled to perform charging and discharging operations on the energy storage power supply.

4. The method according to claim 3, characterized in that, If the input power type is photovoltaic panel input, and the charging / discharging control logic corresponding to the photovoltaic panel input is maximum power point tracking (MPPT) mode, the MPPT mode is used to track the maximum input power of the photovoltaic panel. The step of controlling the bidirectional DC-to-DC converter to perform charging / discharging operations on the energy storage power supply based on the output power control information and the charging / discharging control logic corresponding to the input power type includes: When the power input corresponding to the photovoltaic panel is greater than the output power control information, the bidirectional DC to DC module is restricted from performing charging and discharging operations on the energy storage power. When the power input to the photovoltaic panel is less than or equal to the output power control information, the bidirectional DC-to-DC module is controlled to perform charging and discharging operations on the energy storage power supply according to the maximum power point tracking mode.

5. The method according to claim 3, characterized in that, If the input power type is a distribution network voltage source input, and the charging / discharging control logic corresponding to the distribution network voltage source input is a voltage source control logic, then controlling the bidirectional DC-to-DC module to perform charging / discharging operations on the energy storage power supply according to the output power control information and the charging / discharging control logic corresponding to the input power type includes: According to the voltage source control logic, the power input of the power supply corresponding to the power distribution network voltage source is matched with the output power control information, and the bidirectional DC-DC converter is controlled to perform charging and discharging operations on the energy storage power supply based on the power input of the power supply corresponding to the power distribution network voltage source and the output power control information.

6. An energy storage power supply control device, characterized in that, The device includes: An input power signal acquisition module is used to acquire an input power signal based on preset input control information; determine the signal update status of the input power signal within a target control period; the target control period is the information update period corresponding to the input control information; An input power type determination module is used to determine the input power type based on the signal update state; the input power type includes photovoltaic panel input and power grid voltage source input; wherein, determining the input power type based on the signal update state includes: determining the input power type as power grid voltage source input when the signal update state indicates that the input power signal increases linearly within the target control period; obtaining a first power signal corresponding to the maximum value of the input control information from the input power signal, and obtaining a second power signal from the input power signal, the second power signal being the maximum value of the input power signal within the target control period; determining the input power type as photovoltaic panel input when the signal update state indicates that the input power signal and the input control information are positively correlated within a preset interval, and the ratio of the first power signal to the second power signal is less than a preset threshold; the preset threshold is less than one and greater than zero; the maximum value of the input control information within the preset interval is less than or equal to the input control information corresponding to the second power signal; The charge / discharge control module is used to control the bidirectional DC-to-DC converter to perform charge / discharge operations on the energy storage power supply according to the charge / discharge control logic corresponding to the input power type.

7. An energy storage power source, characterized in that, The energy storage power control method according to any one of claims 1-5 includes: an isolated boost inverter module, a power bus, a controller, and at least one set of energy storage units; the energy storage unit includes a bidirectional DC-DC converter module and an energy storage battery pack. The first end of the power bus is connected to the input end of the energy storage power supply; the input end of the energy storage power supply is used to connect to a photovoltaic panel or a power distribution network voltage source. The second end of the power bus is connected to the first end of the bidirectional DC-DC converter module, and the second end of the bidirectional DC-DC converter module is connected to the energy storage battery pack. The third terminal of the power bus is connected to the first terminal of the isolated boost inverter module, and the second terminal of the isolated boost inverter module is used to connect to the output load. The controller is connected to the control terminal of the bidirectional DC-to-DC module to control the bidirectional DC-to-DC module to perform charging and discharging operations on the energy storage power supply.

8. An electronic device, characterized in that, It includes a processor, a communication interface, a memory, and a communication bus, wherein the processor, the communication interface, and the memory communicate with each other through the communication bus; Memory, used to store computer programs; When a processor executes a program stored in a memory, it implements the steps of the energy storage power control method according to any one of claims 1-5.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the steps of the energy storage power control method as described in any one of claims 1-5.

Images