Load control method and device, equipment and medium

Abstract

The invention discloses a load control method, device, equipment and medium, the method is applied to an optical storage system, the optical storage system comprises an energy storage battery, the optical storage system establishes communication with an intelligent load, the method comprises the following steps: the grid-connected point countercurrent power of the optical storage system and the charging power of the energy storage battery are acquired, and the grid-connected point countercurrent power takes the direction flowing into a power grid as the positive; on the basis of the priority of the energy storage battery and the priority of the intelligent load, the available electric power of the intelligent load is determined by combining the countercurrent power of the grid-connected point and the charging power of the energy storage battery, and the priority relation between the energy storage battery and the intelligent load is used for determining whether the charging power of the energy storage battery is superposed or not when the available electric power of the intelligent load is determined; and controlling the intelligent load to start or stop based on the size relationship between the available power and the rated power of the intelligent load. According to the technical scheme, the intelligent load control requirements of different users can be met, and the flexibility of a load control strategy is improved.

Description

Technical Field

[0001] This application belongs to the field of load management technology, and in particular relates to a load control method, device, equipment and medium. Background Technology

[0002] With the development of photovoltaic power generation and energy storage technologies, photovoltaic-storage systems are gradually being widely used in distributed energy utilization scenarios. Photovoltaic-storage systems can generate electricity using photovoltaic modules under daylight conditions, meeting the load demands of local users while using surplus electricity to charge storage batteries or feed it back to the grid. At night or when sunlight is insufficient, the storage batteries release stored energy to supply user loads, thereby maximizing the utilization of photovoltaic power generation.

[0003] In existing photovoltaic (PV) and energy storage (ESS) systems, most user loads are ordinary loads, which are typically started and stopped manually and do not have a communication connection with the PV and ESS system, thus preventing unified control by the system. With the rise of smart electricity technology, a new type of load has emerged that can establish a communication connection with the PV and ESS system. Smart loads can be started and stopped indirectly through smart switches, or they may possess their own communication and control capabilities, allowing them to dynamically adjust their operating status according to the instructions from the PV and ESS system.

[0004] In related technologies, photovoltaic-storage systems typically employ a fixed power allocation strategy, where photovoltaic power is prioritized for ordinary loads, with the remaining power distributed sequentially to energy storage batteries and smart loads. Therefore, the load control strategies in these technologies are relatively simplistic, exhibiting poor flexibility and adaptability. Summary of the Invention

[0005] This application provides an implementation scheme that differs from related technologies, in order to solve the technical problems of relatively simple load control strategies, poor flexibility and adaptability in related technologies.

[0006] In a first aspect, this application provides a load control method applied to a photovoltaic-storage system, the photovoltaic-storage system including an energy storage battery, the photovoltaic-storage system establishing communication with a smart load, the method comprising: Obtain the grid-connected reverse power of the photovoltaic-storage system and the charging power of the energy storage battery The reverse power of the grid connection point The direction of flow into the power grid is considered positive; Based on the priority of the energy storage battery and the priority of the smart load, combined with the reverse current power at the grid connection point. With the charging power of the energy storage battery Determine the available electrical power of the smart load. The priority relationship between the energy storage battery and the smart load is used to determine the available power of the smart load. Whether the charging power of the energy storage battery is superimposed. ; Based on the available electrical power With the rated power of the smart load The size relationship determines whether the intelligent load is started or stopped.

[0007] Secondly, this application provides a load control device applied to a photovoltaic-storage system, the photovoltaic-storage system including an energy storage battery, the photovoltaic-storage system establishing communication with a smart load, including: The acquisition unit is used to acquire the grid-connected reverse power of the photovoltaic-storage system. and the charging power of the energy storage battery ; The determining unit is used to determine the priority of the energy storage battery and the priority of the smart load, in conjunction with the reverse current power at the grid connection point. With the charging power of the energy storage battery Determine the available electrical power of the smart load. The priority relationship between the energy storage battery and the smart load is used to determine the available power of the smart load. Whether the charging power of the energy storage battery is superimposed. ; Control unit, for use based on the available electrical power With the rated power of the smart load The size relationship determines whether the intelligent load is started or stopped.

[0008] Thirdly, this application provides an electronic device, comprising: Processor; and Memory for storing the executable instructions of the processor; The processor is configured to execute the first aspect, or any method in any possible implementation of the first aspect, by executing the executable instructions.

[0009] Fourthly, embodiments of this application provide a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the first aspect, or any method in any possible implementation of the first aspect.

[0010] The method provided in this application is applied to a photovoltaic-storage system, which includes an energy storage battery. The photovoltaic-storage system establishes communication with a smart load. The method includes: acquiring the reverse current power at the grid connection point of the photovoltaic-storage system. and the charging power of energy storage batteries Grid connection point reverse current power The direction of power flow into the grid is taken as positive; based on the priority of energy storage batteries and smart loads, combined with the reverse power at the grid connection point. With the charging power of energy storage batteries Determine the available power of the smart load. The priority relationship between the energy storage battery and the smart load is used to determine the available electrical power of the smart load. Does it superimpose the charging power of the energy storage battery? Based on available electrical power Rated power of smart load The relative sizes of the photovoltaic power and the smart load control the start or stop of the smart load. The technical solutions provided in the embodiments of this application can utilize the priority relationship between the energy storage battery and the smart load to flexibly determine the available power of the smart load, achieving flexible allocation of photovoltaic power between the energy storage battery and the smart load. This achieves the technical effect of meeting the different user needs for smart load control and improving the flexibility and adaptability of load control strategies. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments or related technologies of this application, the accompanying drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. In the drawings: Figure 1 This is a schematic diagram of the structure of a storage system with an intelligent load provided in an embodiment of this application; Figure 2 A schematic diagram illustrating a first manifestation of a smart load provided in an embodiment of this application; Figure 3 A schematic diagram illustrating a second manifestation of a smart load provided in an embodiment of this application; Figure 4 This is a first flowchart illustrating a load control method provided in an embodiment of this application; Figure 5 A second flowchart illustrating the load control method provided in an embodiment of this application. Figure 6 This is a schematic diagram of the structure of a load control device provided in an embodiment of this application; Figure 7 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. Detailed Implementation

[0012] The embodiments of this application are described in detail below, with examples of these embodiments illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0013] The terms "first" and "second," etc., used in the specification, claims, and drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the solution can be implemented in a different order than that illustrated or described in this application. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that includes a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0014] First, some terms used in the embodiments of this application will be explained below to facilitate understanding by those skilled in the art.

[0015] Photovoltaic-storage system: refers to an energy system that includes photovoltaic power generation modules and energy storage batteries. It can generate electricity using photovoltaic modules under sunlight conditions during the day, meet the load demand of local users, and use the surplus electricity to charge the energy storage battery or feed it back to the grid. At night or when there is insufficient sunlight, the energy storage battery releases the stored electricity to supply the user load.

[0016] Ordinary loads: refer to loads that are usually started and stopped manually, do not have a communication connection with the photovoltaic storage system, and cannot be controlled by the photovoltaic storage system.

[0017] Intelligent loads refer to loads capable of establishing communication connections with the photovoltaic and energy storage system. Intelligent loads can be started and stopped indirectly through intelligent switches, or they may possess their own communication and control capabilities, enabling them to dynamically adjust their operating status according to the instructions of the photovoltaic and energy storage system.

[0018] Maximum self-consumption mode: This refers to a working mode of a photovoltaic-storage system. During the day when there is sunlight, the photovoltaic power is prioritized for supplying ordinary loads of users, and the remaining photovoltaic power flows to the energy storage battery, smart loads, and the grid. At night when there is no photovoltaic power, the energy storage battery can release the electrical energy stored during the day to supply the loads, thereby maximizing the utilization of photovoltaic power.

[0019] Reverse power at grid connection point: refers to the power flowing to the power grid at the grid connection point of the photovoltaic-storage system. In this application, the direction of power flowing into the power grid is defined as the positive direction.

[0020] Green electricity control: refers to a control strategy that uses only surplus photovoltaic power to control the start and stop of intelligent loads.

[0021] Priority: This refers to the order in which smart loads or energy storage batteries utilize photovoltaic power. Higher priority means that surplus photovoltaic power is used first, while lower priority means that surplus photovoltaic power is used later.

[0022] With the development of photovoltaic power generation and energy storage technologies, photovoltaic-storage systems are gradually being widely used in distributed energy utilization scenarios. Sometimes, when the electricity price is low or it is impossible to sell surplus photovoltaic power to the grid, some users will connect smart loads to the photovoltaic-storage system in order to maximize and most economically utilize photovoltaic power. These smart loads do not need to work continuously like ordinary loads; they only start when there is surplus photovoltaic power in the system.

[0023] When smart loads are introduced into a photovoltaic-storage system, the common smart load control strategy is as follows: photovoltaic power is prioritized to meet the needs of ordinary loads, then flows to the energy storage battery, and finally the start and stop of the smart load is controlled based on the remaining photovoltaic power. However, some users have a different requirement for smart load control: photovoltaic power is prioritized to meet the needs of ordinary loads, the start and stop of the smart load is controlled based on the remaining photovoltaic power, and finally the remaining photovoltaic power flows to the energy storage battery.

[0024] To address the aforementioned technical issues, this application provides a load control method, apparatus, device, and medium for providing a green electricity control scheme for smart loads, enabling flexible control over whether photovoltaic power is preferentially directed to smart loads or energy storage batteries, thereby improving the flexibility and adaptability of the load control strategy.

[0025] The technical solution of this application and how it solves the above-mentioned technical problems will be described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will be described below with reference to the accompanying drawings.

[0026] Figure 1 This is a schematic diagram of a photovoltaic-storage system connected to a smart load, which is an exemplary embodiment of this application. The photovoltaic-storage system includes photovoltaic modules, energy storage batteries, and inverters. The photovoltaic-storage system is connected to smart loads and ordinary loads. The AC side of the inverter is connected to the power grid to form a grid connection point. A power sensor for detecting reverse current power is provided at the grid connection point.

[0027] Photovoltaic modules are used to generate electricity under sunlight. Energy storage batteries are used to store electrical energy and release it when needed. Ordinary loads are loads that have not established communication with the photovoltaic and energy storage system and are usually started and stopped manually. Smart loads establish a communication connection with the photovoltaic and energy storage system and can receive control commands from the system to start or stop.

[0028] Please see Figures 2 to 3 , Figures 2 to 3These are all schematic diagrams illustrating the manifestation of intelligent loads provided in the embodiments of this application.

[0029] In some embodiments, the smart load is communicatively connected to the optical storage system and controlled by the optical storage system to perform startup or shutdown, wherein the smart load achieves control in one of the following ways: The intelligent load integrates a communication and control module, which receives and executes start / stop commands from the photovoltaic storage system; or A smart switch is connected in series in the power supply circuit of the smart load. The photovoltaic energy storage system indirectly controls the start and stop of the smart load by controlling the on and off of the smart switch.

[0030] Please see Figure 2 In some embodiments, the smart load itself integrates a communication and control module, which is used to receive and execute start and stop commands from the optical storage system. The smart load itself can be connected to the optical storage system through wired or wireless communication. After the optical storage system establishes communication with the smart load, it directly controls the start and stop of the smart load.

[0031] Please see Figure 3 In other embodiments, a smart switch is connected between the smart load and the optical storage system. The smart switch can be connected to the optical storage system via wired or wireless communication. After the optical storage system establishes communication with the smart switch, it can control the on / off state of the smart switch to indirectly control the start and stop of the load.

[0032] The execution principles and interaction processes of each component unit in this system embodiment can be found in the descriptions of the following method embodiments.

[0033] Figure 4 A flowchart illustrating a load control method provided as an exemplary embodiment of this application is shown. This method is applicable to a photovoltaic-storage system, which includes an energy storage battery. The photovoltaic-storage system establishes communication with a smart load. The method includes at least the following steps: Step 110: Obtain the reverse current power at the grid connection point of the photovoltaic-storage system. and the charging power of energy storage batteries Grid connection point reverse current power The direction of flow into the power grid is considered positive.

[0034] Specifically, the photovoltaic-storage system collects the reverse current power at the grid connection point through a power sensor installed at the grid connection point, and transmits the power value to the photovoltaic-storage system via communication.

[0035] At the same time, the photovoltaic-storage system obtains the charging power of the energy storage battery.

[0036] Step 120: Based on the priority of the energy storage battery and the priority of the smart load, combined with the reverse current power at the grid connection point... With the charging power of energy storage batteries Determine the available power of the smart load. The priority relationship between the energy storage battery and the smart load is used to determine the available electrical power of the smart load. Does it superimpose the charging power of the energy storage battery? .

[0037] In some embodiments, the priority of the energy storage battery and the priority of the smart load are combined with the reverse current power at the grid connection point. With the charging power of energy storage batteries Determine the available power of the smart load. ,include: If the priority of the smart load is higher than that of the energy storage battery, then the reverse current power at the grid connection point will be used as the priority. With the charging power of energy storage batteries The sum of these values ​​determines the available electrical power of the smart load. ; If the priority of the smart load is lower than that of the energy storage battery, then the reverse current power at the grid connection point will be used as the priority. Determine the available electrical power of the smart load .

[0038] More specifically, if the priority of the smart load is higher than that of the energy storage battery, then the reverse current power at the grid connection point will be... With the charging power of energy storage batteries The sum of these represents the available electrical power of the smart load. If the priority of the smart load is lower than that of the energy storage battery, then the reverse current power at the grid connection point will be... Available electrical power as a smart load .

[0039] Step 130, based on available electrical power Rated power of smart load The size relationship controls the start or stop of the intelligent load.

[0040] In some embodiments, the photovoltaic energy storage system is also connected to ordinary loads, which have the highest priority, and the photovoltaic energy storage system prioritizes supplying power to ordinary loads.

[0041] Specifically, under the maximum self-consumption mode, the photovoltaic power first meets the needs of ordinary loads, and the remaining photovoltaic power is used for smart loads and energy storage batteries.

[0042] In some embodiments, based on available electrical power Rated power of smart load The size relationship determines the start or stop of the intelligent load, including the following steps 01 to 03: Step 01, when When ≥0, if ≥ If so, the intelligent load will be started and running, and the available power of the intelligent load will be recalculated. .

[0043] Specifically, when available electrical power The value is non-negative and greater than or equal to the rated power of the smart load. When the system reaches a certain threshold, it indicates that there is sufficient available power in the photovoltaic energy storage system for the smart load, and the smart load is then activated. After the smart load is activated, the power distribution of the system changes, therefore the available power of the smart load needs to be recalculated.

[0044] Step 02, when When ≥0, if < Do not start intelligent load.

[0045] When available electrical power It is a non-negative value but less than the rated power of the smart load. If the power supply is insufficient to support the operation of the smart load, the smart load should not be started to avoid power consumption at the grid connection point.

[0046] Step 03, when When the value is less than 0, the intelligent load will stop operating, and the available power of the intelligent load will be recalculated. .

[0047] When the available power is negative, it indicates that the photovoltaic-storage system currently has no surplus power available for smart loads, and may even need to draw power from the grid. In this case, the smart loads should be stopped to reduce grid power draw. After the smart loads are stopped, the system's power distribution changes, so the available power of the smart loads needs to be recalculated.

[0048] In some embodiments, after controlling the intelligent workload to start running, the method further includes: Real-time acquisition of updated available power of smart loads ; If the updated < And the running time of the intelligent workload Greater than or equal to minimum running time Control the intelligent load to stop running.

[0049] In this embodiment, after the intelligent load is started, the next time it needs to be stopped, the intelligent load will be stopped if its running time exceeds the minimum running time.

[0050] In this application embodiment, the minimum running time is specified. There are no restrictions on the specific values; they can be set reasonably according to the actual needs of the scenario.

[0051] In some embodiments, minimum runtime It can be 30 seconds.

[0052] The purpose of this setting is to prevent the smart load from stopping immediately due to brief power fluctuations after startup, thus ensuring its stable operation. The decision to stop is made based on changes in available power only after the smart load has been running for a certain period.

[0053] In some embodiments, if ≥ Then, control the startup and operation of the intelligent load, including: like ≥ Start tracking the duration for which the intelligent load meets the startup conditions. ; like ≥Startup stable time threshold Then, control the intelligent load to start running.

[0054] In this embodiment, controlling the startup and operation of the intelligent load requires that the intelligent load meets the startup stability time threshold. Under the given conditions, the embodiments of this application specify the startup stabilization time threshold. There is no limit to the specific value; it can be set reasonably according to the actual needs of the scenario, for example, it can be 10 seconds.

[0055] In some embodiments, the smart load consists of multiple smart loads, and the priority of the energy storage battery and the smart load is combined with the reverse current power at the grid connection point. With the charging power of energy storage batteries Determine the available power of the smart load. ,include: Smart loads with higher priority than energy storage batteries are classified into the first group of smart loads. For the first group of smart loads, the surplus photovoltaic power of the photovoltaic-energy storage system is calculated. = + And based on the surplus photovoltaic power Determine the available electrical power of the first group of smart loads; Smart loads with lower priority than energy storage batteries are classified into the second group of smart loads. For the second group of smart loads, the surplus photovoltaic power of the photovoltaic-energy storage system is calculated. = And based on the surplus photovoltaic power Determine the available electrical power of the second group of smart loads.

[0056] In some embodiments, based on surplus photovoltaic power Determine the available electrical power of the first group of smart loads, including: utilizing surplus photovoltaic power. Available electrical power as the first group of smart loads.

[0057] Specifically, in scenarios with multiple smart loads, the smart loads are first grouped according to their priority relationship with the energy storage battery, and then the surplus photovoltaic power of each group is calculated separately. For smart loads with a higher priority than the energy storage battery, their available surplus photovoltaic power includes the power flowing to the energy storage battery and the power flowing to the grid; for smart loads with a lower priority than the energy storage battery, their available surplus photovoltaic power only includes the power flowing to the grid.

[0058] In some embodiments, based on available electrical power Rated power of smart load The size relationship controls the start or stop of intelligent loads, including: The system iterates through multiple smart loads in descending order of startup priority. For the currently visited smart load, if its available power is greater than or equal to its rated power, the system starts operating the currently visited smart load and recalculates the surplus photovoltaic power of the photovoltaic-storage system. If the available power of the currently traversed smart load is less than the rated power of the currently traversed smart load, then the currently traversed smart load will not be started.

[0059] By traversing the smart loads in priority order, the higher-priority smart loads are activated first, ensuring that high-priority loads receive power first. After each smart load is activated, the remaining photovoltaic power is recalculated to provide accurate available power information for determining the next smart load.

[0060] The method provided in this application is applied to a photovoltaic-storage system, which includes an energy storage battery. The photovoltaic-storage system establishes communication with a smart load. The method includes: acquiring the reverse current power at the grid connection point of the photovoltaic-storage system. and the charging power of energy storage batteries Grid connection point reverse current power The direction of power flow into the grid is taken as positive; based on the priority of energy storage batteries and smart loads, combined with the reverse power at the grid connection point. With the charging power of energy storage batteries Determine the available power of the smart load. The priority relationship between the energy storage battery and the smart load is used to determine the available electrical power of the smart load. Does it superimpose the charging power of the energy storage battery? Based on available electrical power Rated power of smart load The relative sizes of the photovoltaic power and the smart load control the start or stop of the smart load. The technical solutions provided in the embodiments of this application can utilize the priority relationship between the energy storage battery and the smart load to flexibly determine the available power of the smart load, achieving flexible allocation of photovoltaic power between the energy storage battery and the smart load. This achieves the technical effect of meeting the different user needs for smart load control and improving the flexibility and adaptability of load control strategies.

[0061] To better illustrate the load control method provided in the embodiments of this application, please refer to... Figure 5 , Figure 5 This is a second flowchart of the load control method improved in the embodiments of this application. The load control method provided in the embodiments of this application can be summarized as follows: S51, Obtain the reverse power at the grid connection point of the photovoltaic-storage system. and the charging power of energy storage batteries ; S52, determine whether the priority of the energy storage battery is greater than the priority of the smart load. If yes, execute S53; otherwise, execute S54. S53, available power of smart loads Equal to the reverse power at the grid connection point ; S54, available power of smart loads Equal to the reverse current power at the grid connection point Plus the charging power of the energy storage battery ; S55 determines the available power of the smart load. Is it greater than or equal to 0? If yes, execute S56; otherwise, execute S58. S56, determine the available power of the smart load. Is it greater than or equal to the rated power of the smart load? If so, execute S57; S57, initiate intelligent load balancing; S58, do not start smart load.

[0062] To better illustrate the load control method provided in this application, several specific embodiments are described below: Example 1: A scenario where a photovoltaic-storage system is connected to a single smart load, the photovoltaic-storage system including a storage battery, and the smart load has a lower priority than the storage battery: The optical storage system is connected to a smart load with a rated power of [missing information]. The current photovoltaic (PV) power in the solar-storage system is 6kW, and the rated charging power of the energy storage battery is 3kW. Under maximum self-consumption mode, the PV power charges the energy storage battery, with a charging power of... The remaining photovoltaic power flows to the grid, i.e., the reverse power at the grid connection point. .

[0063] Smart loads have lower priority than energy storage batteries, therefore the available power of smart loads is... Due to the rated power of intelligent loads Therefore, smart loads can be activated. In steady state, the photovoltaic system charges the energy storage battery with 3kW, provides 2kW of power to the smart load, and the remaining 1kW of power flows to the grid.

[0064] As light intensity decreases, the maximum output power of the photovoltaic-storage system drops to 4kW. The power sensor at the grid connection point samples a grid-connected power of -1kW, which is the reverse current power at the grid connection point. .

[0065] Due to the available electrical power of smart loads The smart load needs to be stopped. After the photovoltaic-storage system controls the smart load to stop, the power sensor at the grid connection point samples the grid-connected power as 1kW, which is the reverse current power at the grid connection point. .at this time At this time, the smart load is not activated. In steady state, the photovoltaic system charges the energy storage battery with 3kW, and the remaining 1kW of power flows to the grid, so the smart load is not activated.

[0066] Example 2: A scenario where a photovoltaic-storage system is connected to a single smart load, the photovoltaic-storage system including a storage battery, and the smart load has higher priority than the storage battery: The photovoltaic energy storage system has a smart load with a rated power of [missing information]. The current photovoltaic (PV) power in the solar-storage system is 6kW, and the rated charging power of the energy storage battery is 3kW. Under maximum self-consumption mode, the PV power charges the energy storage battery, with a charging power of... The remaining photovoltaic power flows to the grid, i.e., the reverse power at the grid connection point. .

[0067] Smart loads have higher priority than energy storage batteries, therefore the available power of smart loads is... Due to the rated power of intelligent loads Therefore, smart loads can be activated. In steady state, the photovoltaic system provides 4kW of power to the smart load, and the remaining 2kW of power is used to charge the energy storage battery.

[0068] Example 3: A photovoltaic-storage system is connected to multiple smart loads. The photovoltaic-storage system includes energy storage batteries, and the priority of the energy storage batteries and smart loads is arbitrarily arranged: For example, a photovoltaic (PV) and energy storage system has three smart loads: Smart Load 1, Smart Load 2, and Smart Load 3. The priority of these three smart loads and the energy storage battery, from highest to lowest, is: Smart Load 1, Smart Load 2, Energy Storage Battery, Smart Load 3. The rated power of Smart Loads 1, 2, and 3 are 4kW, 3kW, and 2kW, respectively. The current PV power in the system is 8kW, and the rated charging power of the energy storage battery is 3kW. In maximum self-consumption mode, the PV power charges the energy storage battery, and the charging power... The remaining photovoltaic power flows to the grid, i.e., the reverse power at the grid connection point. .

[0069] Step 1: Based on the priorities of the smart loads and energy storage batteries mentioned above, the smart loads can be divided into two categories.

[0070] Smart loads 1 and 2 (smart loads with higher priority than the energy storage battery) are used to calculate the remaining photovoltaic power in the system. ; Smart Load 3 (a smart load with lower priority than the energy storage battery), at this time the amount of surplus photovoltaic power in the calculation system is... .

[0071] Step Two: Based on the priority of the smart loads mentioned above, sort the unstarted smart loads in the system from high to low, in the following order: Smart Load 1, Smart Load 2, Smart Load 3. .

[0072] Based on the sorting results, the smart loads are determined sequentially. Smart load 1 is processed first, since... If so, the photovoltaic-storage system will activate smart load 1. After activating smart load 1, the surplus photovoltaic power will be recalculated according to step one.

[0073] In steady state, the photovoltaic-storage system starts up smart load 1 and smart load 2, while smart load 3 stops. Photovoltaic power is preferentially directed to smart load 1 and smart load 2, and the remaining 1kW of photovoltaic power is used to charge the energy storage battery.

[0074] Figure 6 This is a schematic diagram of a load control device provided as an exemplary embodiment of the present application. The device is applied to a photovoltaic energy storage system, which includes an energy storage battery and establishes communication with a smart load. The device includes: Acquisition unit 61 is used to acquire the reverse power at the grid connection point of the photovoltaic-storage system. and the charging power of energy storage batteries ; Determining unit 62 is used to determine the priority of energy storage batteries and smart loads, combined with the reverse current power at the grid connection point. With the charging power of energy storage batteries Determine the available power of the smart load. The priority relationship between the energy storage battery and the smart load is used to determine the available electrical power of the smart load. Does it superimpose the charging power of the energy storage battery? ; Control unit 63, for use based on available electrical power Rated power of smart load The size relationship controls the start or stop of the intelligent load.

[0075] In some embodiments, the device combines grid connection point reverse current power with priority based on energy storage batteries and smart loads. With the charging power of energy storage batteries Determine the available power of the smart load. When, specifically used for: If the priority of the smart load is higher than that of the energy storage battery, then the reverse current power at the grid connection point will be used as the priority. With the charging power of energy storage batteries The sum of these values ​​determines the available electrical power of the smart load. ; If the priority of the smart load is lower than that of the energy storage battery, then the reverse current power at the grid connection point will be used as the priority. Determine the available electrical power of the smart load .

[0076] In some embodiments, the device is used for based on available electrical power Rated power of smart load The size relationship is used to control the start or stop of the intelligent load, specifically for: when When ≥0, if ≥ If so, the intelligent load will be started and running, and the available power of the intelligent load will be recalculated. ; when When ≥0, if < Do not start intelligent load; when When the value is less than 0, the intelligent load will stop operating, and the available power of the intelligent load will be recalculated. .

[0077] In some embodiments, after controlling the smart load to start running, the device is further configured to: Real-time acquisition of updated available power of smart loads ; If the updated < And the running time of the intelligent workload Greater than or equal to minimum running time Control the intelligent load to stop running.

[0078] In some embodiments, the device is used for if ≥ Then, it controls the startup and operation of the intelligent load, specifically for: like ≥ Start tracking the duration for which the intelligent load meets the startup conditions. ; like ≥Startup stable time threshold Then, control the intelligent load to start running.

[0079] In some embodiments, the smart loads are multiple smart loads, and the device is used for prioritizing the energy storage battery and the smart loads, combined with the grid connection point reverse current power. With the charging power of energy storage batteries Determine the available power of the smart load. When, specifically used for: Smart loads with higher priority than energy storage batteries are classified into the first group of smart loads. For the first group of smart loads, the surplus photovoltaic power of the photovoltaic-energy storage system is calculated. = + And based on the surplus photovoltaic power Determine the available electrical power of the first group of smart loads; Smart loads with lower priority than energy storage batteries are classified into the second group of smart loads. For the second group of smart loads, the surplus photovoltaic power of the photovoltaic-energy storage system is calculated. = And based on the surplus photovoltaic power Determine the available electrical power of the second group of smart loads; In some embodiments, the device is used for based on available electrical power Rated power of smart load The size relationship is used to control the start or stop of the intelligent load, specifically for: The system iterates through multiple smart loads in descending order of startup priority. For the currently visited smart load, if its available power is greater than or equal to its rated power, the system starts operating the currently visited smart load and recalculates the surplus photovoltaic power of the photovoltaic-storage system. If the available power of the currently traversed smart load is less than the rated power of the currently traversed smart load, then the currently traversed smart load will not be started.

[0080] In some embodiments, the photovoltaic energy storage system is also connected to ordinary loads, which have the highest priority, and the photovoltaic energy storage system prioritizes supplying power to ordinary loads.

[0081] It should be understood that the device embodiments and method embodiments can correspond to each other, and similar descriptions can be referred to the method embodiments. To avoid repetition, they will not be repeated here. Specifically, the device can execute the above method embodiments, and the foregoing and other operations and / or functions of each module in the device correspond to the corresponding processes in the various methods in the above method embodiments, which will not be repeated here for the sake of brevity.

[0082] The apparatus of this application embodiment has been described above from the perspective of functional modules in conjunction with the accompanying drawings. It should be understood that this functional module can be implemented in hardware, in software instructions, or in a combination of hardware and software modules. Specifically, the steps of the method embodiments in this application can be completed by integrated logic circuits in the processor's hardware and / or by software instructions. The steps of the method disclosed in this application embodiment can be directly embodied as being executed by a hardware decoding processor, or by a combination of hardware and software modules in the decoding processor. Optionally, the software module can reside in a mature storage medium in the art, such as random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, etc. This storage medium is located in memory, and the processor reads information from the memory and, in conjunction with its hardware, completes the steps in the above method embodiments.

[0083] Figure 7 This is a schematic block diagram of an electronic device provided in an embodiment of this application. The electronic device may include: The system includes a memory 701 and a processor 702. The memory 701 stores computer programs and transfers the program code to the processor 702. In other words, the processor 702 can retrieve and run the computer programs from the memory 701 to implement the methods described in the embodiments of this application.

[0084] For example, the processor 702 can be used to execute the above-described method embodiments according to instructions in the computer program.

[0085] In some embodiments of this application, the processor 702 may include, but is not limited to: General-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc.

[0086] In some embodiments of this application, the memory 701 includes, but is not limited to: Volatile memory and / or non-volatile memory. Non-volatile memory can be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. Volatile memory can be random access memory (RAM), used as an external cache. By way of example, but not limitation, many forms of RAM are available, such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDR SDRAM), Enhanced SDRAM (ESDRAM), Synchronous Link DRAM (SLDRAM), and Direct Rambus RAM (DR RAM).

[0087] In some embodiments of this application, the computer program may be divided into one or more modules, which are stored in the memory 701 and executed by the processor 702 to perform the method provided in this application. The one or more modules may be a series of computer program instruction segments capable of performing a specific function, which describe the execution process of the computer program in the electronic device.

[0088] like Figure 7 As shown, the electronic device may further include: Transceiver 703, which can be connected to processor 702 or memory 701.

[0089] The processor 702 can control the transceiver 703 to communicate with other devices; specifically, it can send information or data to other devices or receive information or data sent by other devices. The transceiver 703 may include a transmitter and a receiver. The transceiver 703 may further include antennas, and the number of antennas may be one or more.

[0090] It should be understood that the various components in the electronic device are connected through a bus system, which includes a data bus, a power bus, a control bus, and a status signal bus.

[0091] This application also provides a computer storage medium storing a computer program thereon, which, when executed by a computer, enables the computer to perform the methods of the above-described method embodiments. Alternatively, embodiments of this application also provide a computer program product containing instructions that, when executed by a computer, cause the computer to perform the methods of the above-described method embodiments.

[0092] When implemented using software, it can be implemented entirely or partially as a computer program product. This computer program product includes one or more computer instructions. When these computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of this 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. For example, the computer instructions can be transmitted from one website, computer, server, or data center to another via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium accessible to a computer or a data storage device such as a server or data center that integrates one or more available media. The available medium can be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., digital video disc (DVD)), or a semiconductor medium (e.g., solid-state disk (SSD)).

[0093] Those skilled in the art will recognize that the modules and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0094] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of modules is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple modules or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or modules may be electrical, mechanical, or other forms.

[0095] The modules described as separate components may or may not be physically separate. The components shown as modules may or may not be physical modules; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. For example, the functional modules in the various embodiments of this application may be integrated into one processing module, or each module may exist physically separately, or two or more modules may be integrated into one module.

[0096] In the embodiments of this application, the terms "module" or "unit" refer to a computer program or part of a computer program that has a predetermined function and works with other related parts to achieve a predetermined goal, and can be implemented wholly or partially using software, hardware (such as processing circuitry or memory), or a combination thereof. Similarly, a processor (or multiple processors or memory) can be used to implement one or more modules or units. Furthermore, each module or unit can be part of an overall module or unit that includes the functionality of that module or unit.

[0097] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A load control method, characterized in that, Applied to a photovoltaic-storage system, the photovoltaic-storage system including an energy storage battery, the photovoltaic-storage system establishing communication with a smart load, the method includes: Obtain the grid-connected reverse power of the photovoltaic-storage system and the charging power of the energy storage battery The reverse power of the grid connection point The direction of flow into the power grid is considered positive; Based on the priority of the energy storage battery and the priority of the smart load, combined with the reverse current power at the grid connection point. With the charging power of the energy storage battery Determine the available electrical power of the smart load. The priority relationship between the energy storage battery and the smart load is used to determine the available power of the smart load. Whether the charging power of the energy storage battery is superimposed. ; Based on the available electrical power With the rated power of the smart load The size relationship determines whether the intelligent load is started or stopped.

2. The method according to claim 1, characterized in that, The priority of the energy storage battery and the priority of the smart load are combined with the reverse current power at the grid connection point. With the charging power of the energy storage battery Determine the available electrical power of the smart load. ,include: If the priority of the smart load is higher than that of the energy storage battery, then the reverse current power at the grid connection point will be used as the determining factor. With the charging power of the energy storage battery The sum of these values ​​determines the available electrical power of the smart load. ; If the priority of the smart load is lower than that of the energy storage battery, then the priority is determined by the reverse current power at the grid connection point. Determine the available electrical power of the smart load. .

3. The method according to claim 1, characterized in that, Based on the available electrical power With the rated power of the smart load The size relationship controls the start or stop of the intelligent load, including: when When ≥0, if ≥ If so, the intelligent load will be started and running, and the available power of the intelligent load will be recalculated. ; when When ≥0, if < The intelligent load will not be started; when If the value is less than 0, the intelligent load will stop operating, and its available power will be recalculated. .

4. The method according to claim 3, characterized in that, After controlling the intelligent load to start running, the method further includes: Real-time acquisition of the updated available power of the smart load ; If the updated < And the running time of the intelligent load Greater than or equal to minimum running time The intelligent load is then controlled to stop running.

5. The method according to claim 3, characterized in that, like ≥ Then, control the intelligent load to start running, including: like ≥ Start counting the duration for which the intelligent load meets the startup conditions. ; like ≥Startup stable time threshold Then, control the intelligent load to start running.

6. The method according to claim 1, characterized in that, The smart load comprises multiple smart loads, and the priority of the energy storage battery and the smart loads are combined with the reverse current power at the grid connection point. With the charging power of the energy storage battery Determine the available electrical power of the smart load. ,include: The smart loads with higher priority than the energy storage battery are classified into the first group of smart loads. For the first group of smart loads, the surplus photovoltaic power of the photovoltaic-energy storage system is calculated. = + And based on the photovoltaic surplus power Determine the available electrical power of the first group of smart loads; Smart loads with a lower priority than the energy storage battery are classified into a second group of smart loads. For the second group of smart loads, the surplus photovoltaic power of the photovoltaic-energy storage system is calculated. = And based on the photovoltaic surplus power Determine the available electrical power of the second group of smart loads.

7. The method according to claim 6, characterized in that, Based on the available electrical power With the rated power of the smart load The size relationship controls the start or stop of the intelligent load, including: The multiple smart loads are traversed in descending order of startup priority. For the currently traversed smart load, if the available power of the currently traversed smart load is greater than or equal to the rated power of the currently traversed smart load, then the currently traversed smart load is controlled to start operation, and the surplus photovoltaic power of the photovoltaic energy storage system is recalculated. If the available power of the currently traversed smart load is less than the rated power of the currently traversed smart load, then the currently traversed smart load will not be started.

8. The method according to claim 1, characterized in that, The photovoltaic energy storage system is also connected to ordinary loads, which have the highest priority, and the photovoltaic energy storage system prioritizes supplying power to the ordinary loads.

9. A load control device, characterized in that, Applied to a photovoltaic-storage system, the photovoltaic-storage system includes an energy storage battery, and the photovoltaic-storage system establishes communication with a smart load, including: The acquisition unit is used to acquire the grid-connected reverse power of the photovoltaic-storage system. and the charging power of the energy storage battery ; The determining unit is used to determine the priority of the energy storage battery and the priority of the smart load, in conjunction with the reverse current power at the grid connection point. With the charging power of the energy storage battery Determine the available electrical power of the smart load. The priority relationship between the energy storage battery and the smart load is used to determine the available power of the smart load. Whether the charging power of the energy storage battery is superimposed. ; Control unit, for use based on the available electrical power With the rated power of the smart load The size relationship determines whether the intelligent load is started or stopped.

10. An electronic device, characterized in that, include: processor; as well as Memory for storing the executable instructions of the processor; The processor is configured to execute the method of any one of claims 1-8 by executing the executable instructions.

11. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the method described in any one of claims 1-8.

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