Island light storage direct-flexible system and control method and device thereof, electronic equipment and medium

Abstract

The invention discloses an island light storage direct-flexible system, a control method and device thereof, electronic equipment and a medium. The method comprises the steps of calculating actual regulation and control power required by a next regulation and control time period according to current actual power generation, power storage and power utilization data and a flexibility value corresponding to the next regulation and control time period; according to the actual regulation and control power, the predicted regulation and control power corresponding to the next regulation and control time period in the preliminary regulation and control instruction is corrected so as to determine target regulation and control power, and the preliminary regulation and control instruction of the future preset time is generated in advance according to the predicted power generation, power storage and power utilization data and the flexibility value so as to determine the target regulation and control power. The preliminary regulation and control instruction comprises a plurality of predicted regulation and control powers and corresponding regulation and control time periods; and regulating and controlling the flexible load according to the target regulation and control power in the next regulation and control time period. According to the invention, accurate flexible load regulation and control are realized, the time of supporting load power utilization by the energy storage module can be prolonged, system fluctuation is reduced, and the stability and reliability of system operation are improved.

Description

Technical Field

[0001] The present invention relates to the field of microgrid technology, and in particular to an isolated solar-storage direct-flexible system and a control method, device, electronic equipment and medium thereof. Background Art

[0002] Photovoltaic, energy storage, direct current and flexible power are short for the application of solar photovoltaic, energy storage, direct current and flexible interaction in the field of construction. The isolated photovoltaic, energy storage and direct current system is an independently operated microgrid. The isolated photovoltaic, energy storage and direct current energy station is the integrated equipment of this microgrid. It does not rely on the external power grid and can be deployed quickly. It is usually used in remote areas, isolated islands or special occasions.

[0003] Isolated-grid PV-storage direct flexible energy stations lack the support of external power grids, and the system stability is more susceptible to power generation fluctuations and load changes. At present, isolated-grid PV-storage direct flexible energy stations generally fully guarantee load power consumption and do not perform flexible load regulation. In addition, isolated-grid PV-storage direct flexible energy stations usually rely on renewable energy sources such as solar energy. The intermittent and uncertain nature of these energy sources can easily lead to system shutdowns and load unavailability, resulting in unstable system operation and reduced reliability.

[0004] There is no effective solution to the problem of unstable operation of isolated optical-storage direct-flexible systems in the existing technology. Summary of the invention

[0005] The embodiments of the present invention provide an isolated solar-storage-direct-flexible system and a control method, device, electronic device and medium thereof, so as to at least solve the problem of unstable operation of the isolated solar-storage-direct-flexible system in the prior art.

[0006] In order to solve the above technical problems, an embodiment of the present invention provides a control method for an isolated solar-storage direct-flexible system, including:

[0007] Calculate the actual control power required for the next control period according to the current actual power generation, power storage, power consumption data and the flexibility value corresponding to the next control period;

[0008] According to the actual control power, the predicted control power corresponding to the next control period in the preliminary control instruction is corrected to determine the target control power, wherein the preliminary control instruction for a preset time in the future is generated in advance according to the predicted power generation, power storage, power consumption data and flexibility value, and the preliminary control instruction includes multiple predicted control powers and their corresponding control periods;

[0009] The flexible load is regulated according to the target regulation power during the next regulation period.

[0010] Optionally, according to current actual power generation, power storage, power consumption data and the flexibility value corresponding to the next control period, the actual control power required for the next control period is calculated, including:

[0011] Determine the system available power based on the actual current photovoltaic power generation and the remaining power of the energy storage module;

[0012] Determine the power to be cut according to the current actual load demand power and the system available power, wherein the power to be cut is the power that needs to be cut from the flexible load;

[0013] Calculate the product of the current actual load demand power and the flexibility value corresponding to the next regulation period to obtain the maximum power allowed for regulation;

[0014] The actual regulated power is determined according to the power to be cut and the maximum power allowed to be regulated.

[0015] Optionally, the system available power is determined according to the current actual photovoltaic power generation power and the remaining power of the energy storage module, including:

[0016] Calculate the current actual remaining power of the energy storage module minus the reserved power to obtain the available power of the energy storage module;

[0017] Calculate the available power of the energy storage module and divide it by the duration of the next regulation period to obtain the average power that the energy storage module can provide in the next regulation period;

[0018] The sum of the current actual photovoltaic power generation power and the average power is calculated to obtain the system available power.

[0019] Optionally, determining the power to be cut according to the current actual load demand power and the system available power includes:

[0020] Comparing the current actual load demand power with the available power of the system;

[0021] If the current actual load demand power is greater than the system available power, the current actual load demand power minus the system available power is calculated to obtain the power to be reduced;

[0022] If the current actual load demand power is less than or equal to the system available power, the power to be reduced is determined to be 0.

[0023] Optionally, determining the actual regulated power according to the power to be cut and the maximum power allowed to be regulated includes:

[0024] Comparing the power to be reduced with the maximum power allowed to be regulated;

[0025] If the power to be reduced is less than the maximum power allowed to be regulated, the power to be reduced is used as the actual regulated power;

[0026] If the power to be reduced is greater than or equal to the maximum power allowed to be regulated, the maximum power allowed to be regulated is used as the actual regulated power.

[0027] Optionally, a preliminary control instruction for a preset future time is generated in advance based on the predicted power generation, power storage, power consumption data and flexibility value, including:

[0028] Predicting the photovoltaic power generation corresponding to each unit time in the future preset time according to the meteorological data and historical power generation data in the future preset time;

[0029] Predicting the power demand corresponding to each unit time in the future preset time based on the user's historical usage behavior;

[0030] For each unit time within the preset future time, the power prediction value to be reduced is determined according to the photovoltaic power prediction value, the energy storage module remaining power prediction value and the power demand prediction value corresponding to the unit time, and the product of the power demand prediction value and the flexibility value corresponding to the unit time is calculated to obtain the maximum power prediction value allowed to be regulated;

[0031] The minimum value between the predicted value of the power to be reduced and the predicted value of the maximum power is used as the predicted control power corresponding to the unit time.

[0032] Optionally, the predicted control power corresponding to the next control period in the preliminary control instruction is corrected according to the actual control power to determine the target control power, including:

[0033] Comparing the actual regulated power with the predicted regulated power;

[0034] If the actual control power is less than or equal to the predicted control power, the predicted control power is used as the target control power;

[0035] If the actual control power is greater than the predicted control power, the actual control power is used as the target control power.

[0036] Optionally, before calculating the actual control power required for the next control period according to the current actual power generation, power storage, power consumption data and the flexibility value corresponding to the next control period, the method further includes:

[0037] Determine whether the actual remaining power of the energy storage module is greater than the reserved power;

[0038] If the current actual remaining power of the energy storage module is not greater than the reserved power, the energy storage module is prohibited from discharging, and the load power is adjusted to be less than the current actual photovoltaic power generation power until the remaining power of the energy storage module is greater than the preset power, wherein the preset power is greater than the reserved power.

[0039] Optionally, the above method further includes:

[0040] In response to a first user setting instruction, setting flexibility values ​​for different time periods; and / or,

[0041] In response to the second user setting instruction, priorities are set for the flexible loads, and the power of the flexible loads with low priorities is preferentially cut.

[0042] Optionally, at least one power control gear is set for the flexible load; and the flexible load is regulated according to the target control power during the next control period, including: for a flexible load that needs to be regulated and does not need to be shut down, determining a power control gear that is closest to the power value to be adjusted under the flexible load, and reducing the power of the flexible load according to the determined power control gear.

[0043] The embodiment of the present invention further provides a control device for an isolated solar-storage direct-flexible system, comprising:

[0044] A calculation module, used to calculate the actual control power required for the next control period according to the current actual power generation, power storage, power consumption data and the flexibility value corresponding to the next control period;

[0045] A correction module, used for correcting the predicted control power corresponding to the next control period in the preliminary control instruction according to the actual control power to determine the target control power, wherein the preliminary control instruction for a preset time in the future is generated in advance according to the predicted power generation, power storage, power consumption data and flexibility value, and the preliminary control instruction includes multiple predicted control powers and their corresponding control periods;

[0046] The control module is used to control the flexible load according to the target control power in the next control period.

[0047] An embodiment of the present invention further provides an isolated solar-storage direct-flexible system, comprising: the isolated solar-storage direct-flexible system control device described in the embodiment of the present invention.

[0048] An embodiment of the present invention also provides an electronic device, including: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, the control method of the isolated island photovoltaic storage direct-flexible system described in the embodiment of the present invention is implemented.

[0049] An embodiment of the present invention further provides a non-volatile computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the control method of the isolated island photovoltaic storage direct-flexible system described in the embodiment of the present invention is implemented.

[0050] By applying the technical solution of the present invention, the isolated photovoltaic storage direct-flexible system has a flexible load control function. It calculates in advance based on the predicted data and provides initial control instructions for control within a preset time in the future as a reference value for control. Taking into account the intermittent and uncertain nature of renewable energy such as solar energy and the possible changing load demand, when the preset time in the future arrives, the initial control instructions are corrected according to real-time data to determine the target control power and perform flexible load control according to the target control power, thereby achieving precise flexible load control, which can extend the time that the energy storage module supports load power consumption, reduce system fluctuations, and improve the stability and reliability of system operation. It solves the problem of unstable operation of the isolated photovoltaic storage direct-flexible system in the prior art, and can more flexibly respond to the volatility and uncertainty of renewable energy, ensure that the system makes the most appropriate control decisions, more effectively utilize the limited resources in the system, reduce dependence on expensive standby power generation equipment, reduce operating costs, and improve economy. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Figure 1 It is a flow chart of a control method of an isolated photovoltaic storage direct-flexible system provided by an embodiment of the present invention;

[0052] Figure 2 It is a schematic diagram of the architecture of an isolated grid-type photovoltaic storage direct flexible energy station with flexible load regulation function provided by an embodiment of the present invention;

[0053] Figure 3 It is a schematic diagram of the flexible control process of an isolated grid-type photovoltaic storage direct flexible energy station provided by an embodiment of the present invention;

[0054] Figure 4 It is a structural block diagram of an isolated solar-storage direct-flexible system control device provided by an embodiment of the present invention;

[0055] Figure 5 It is a schematic diagram of the hardware structure of an electronic device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0056] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0057] It should be noted that the terms "first", "second", etc. in the specification, claims and drawings of the present invention are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0058] It should be noted that the steps shown in the flowcharts of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and that, although a logical order is shown in the flowcharts, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0059] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0060] The isolated grid photovoltaic storage direct-flexible system relies on renewable energy sources such as solar energy, which are intermittent and uncertain. For example, due to extreme weather or shadows, photovoltaic power generation is insufficient, and the load requires continuous electricity. This will cause the energy storage module to continuously discharge until the remaining power is zero, the system shuts down, and the load is unavailable, which in turn leads to unstable system operation and reduced reliability.

[0061] In order to solve this problem, this embodiment provides an isolated photovoltaic energy storage direct-flexible system control method, which can perform flexible load control, calculate in advance based on predicted data, and provide initial control instructions for control within a preset time in the future as a reference value for control. Taking into account the intermittent and uncertain nature of renewable energy such as solar energy and the possible changing load demand, the initial control instructions are corrected according to real-time data to achieve precise control and ensure the stability and reliability of system operation.

[0062] Example 1

[0063] Figure 1 : is a flow chart of a control method for an isolated solar-storage direct-flexible system provided by an embodiment of the present invention. Figure 1 As shown, the method comprises the following steps:

[0064] S101, calculating the actual control power required for the next control period according to the current actual power generation, power storage, power consumption data and the flexibility value corresponding to the next control period.

[0065] S102, correcting the predicted control power corresponding to the next control period in the preliminary control instruction according to the actual control power to determine the target control power, wherein the preliminary control instruction for a future preset time is generated in advance according to the predicted power generation, power storage, power consumption data and flexibility value, and the preliminary control instruction includes multiple predicted control powers and their corresponding control periods.

[0066] S103, regulating the flexible load according to the target regulation power in the next regulation period.

[0067] Flexible load refers to electrical equipment with adjustable power, such as air conditioners and lighting. The flexibility value is an indicator to measure the flexible adjustment ability of the flexible load. The flexibility value is used to characterize the allowable power regulation range. The larger the flexibility value, the larger the allowable power regulation range and the stronger the power regulation ability of the flexible load. For example, a flexibility value of 0 means no flexible load regulation, and a flexibility value of 0.5 means that the user can accept half the power regulation of the flexible load. The flexibility value can use the default value or can be set by the user according to actual needs. During the operation of the isolated solar-storage direct-flexible system, a unified flexibility value can be used, or corresponding flexibility values ​​can be set for different time periods or different scenarios.

[0068] The preset time refers to the prediction cycle. The preset time can be set according to the actual situation. For example, if the preset time is 1 day, the prediction is made on a 1-day basis. Today, tomorrow's power generation, storage, and consumption data are predicted, and tomorrow's preliminary control instructions are generated based on the predicted data.

[0069] The control period refers to the duration of a single control operation, which can be called the control duration. The control period is less than the preset time, which can be understood as dividing the preset time into multiple control periods. The duration of each control period within the preset time may be different. For example, the preset time is 1 day, and the control period is 15 minutes or 30 minutes. In practical applications, a unit time can be set as the basic control unit, and the load power is regulated at least once per unit time, for example, the unit time is 15 minutes. The control period can be composed of one or more unit times. Exemplarily, the current control period is 15 minutes. During these 15 minutes, the flexible load is controlled and operated according to the target control power corresponding to the current control period, and during this period, the actual operation data can be collected to calculate the actual control power of the next control period, so as to provide a guarantee for the timely optimization and correction of the next control period.

[0070] The actual control power is obtained based on the actual operation data, and the predicted control power is obtained based on the predicted data. The predicted control power is used as a control reference value to indicate the control direction to the system to ensure the normal operation of the system. The actual control power is used to correct the predicted control power to obtain the basis for the final execution of control, that is, the target control power.

[0071] The flexible load is regulated according to the target control power, which can be specifically to reduce the operating power of the target load or shut down the target load.

[0072] The isolated photovoltaic, storage, direct-current and flexible system of this embodiment has a flexible load control function. It calculates in advance based on predicted data and provides initial control instructions for control within a preset time in the future as a reference value for control. Taking into account the intermittent and uncertain nature of renewable energy such as solar energy and the possible changing load demand, when the preset time in the future arrives, the initial control instructions are corrected according to real-time data to determine the target control power and perform flexible load control according to the target control power, thereby achieving precise flexible load control, which can extend the time that the energy storage module supports load power consumption, reduce system fluctuations, and improve the stability and reliability of system operation. It solves the problem of unstable operation of isolated photovoltaic, storage, direct-current and flexible systems in the prior art, and can more flexibly respond to the volatility and uncertainty of renewable energy, ensuring that the system makes the most appropriate control decisions, more effectively utilizes limited resources in the system, reduces dependence on expensive standby power generation equipment, reduces operating costs, and improves economy.

[0073] In an optional embodiment, the actual control power required for the next control period is calculated based on the current actual power generation, power storage, power consumption data and the flexibility value corresponding to the next control period, including: determining the system available power based on the current actual photovoltaic power generation power and the remaining power of the energy storage module; determining the power to be reduced based on the current actual load demand power and the system available power, wherein the power to be reduced is the power that needs to be reduced from the flexible load; calculating the product of the current actual load demand power and the flexibility value corresponding to the next control period to obtain the maximum power allowed for regulation; determining the actual control power based on the power to be reduced and the maximum power allowed for regulation. Among them, the photovoltaic power generation power, the remaining power of the energy storage module, and the load demand power are all system operation data that can be collected in real time.

[0074] This implementation can quickly and accurately determine the actual regulated power based on actual operating data.

[0075] Specifically, the system available power is determined according to the current actual photovoltaic power generation power and the remaining power of the energy storage module, including: calculating the current actual remaining power of the energy storage module minus the reserved power to obtain the available power of the energy storage module; calculating the available power of the energy storage module and dividing it by the duration of the next regulation period to obtain the average power that the energy storage module can provide during the next regulation period; calculating the sum of the current actual photovoltaic power generation power and the average power to obtain the system available power.

[0076] Among them, the isolated solar-storage direct-flexible system is not connected to the grid, and the reserved power of the energy storage module is used for emergency purposes. The reserved power needs to be deducted when calculating the available power of the system. The reserved power can be set according to the actual situation. For example, the reserved power is set to 20% of the total capacity of the energy storage module.

[0077] This implementation can quickly determine the system available power based on the actual situation of system power generation and storage.

[0078] Specifically, the power to be reduced is determined based on the current actual load demand power and the system available power, including: comparing the current actual load demand power with the system available power; if the current actual load demand power is greater than the system available power, calculating the current actual load demand power minus the system available power to obtain the power to be reduced; if the current actual load demand power is less than or equal to the system available power, determining that the power to be reduced is 0.

[0079] This implementation can quickly determine the power to be cut based on the actual load demand and the system available power.

[0080] Specifically, the actual regulated power is determined according to the power to be cut and the maximum power allowed to be regulated, including: comparing the power to be cut and the maximum power allowed to be regulated; if the power to be cut is less than the maximum power allowed to be regulated, then the power to be cut is used as the actual regulated power; if the power to be cut is greater than or equal to the maximum power allowed to be regulated, then the maximum power allowed to be regulated is used as the actual regulated power.

[0081] This implementation comprehensively considers the power to be reduced and the maximum power allowed to be regulated, and takes the minimum value of the two as the actual regulated power, which can ensure that it does not exceed the allowed regulation range.

[0082] The calculation process of the predicted control power is similar to the calculation process of the actual control power mentioned above. According to the predicted power generation, storage, and consumption data within the future preset time and the flexibility value corresponding to the future preset time, the predicted control power for different control periods within the future preset time is calculated.

[0083] In one embodiment, preliminary control instructions for a future preset time are generated in advance based on predicted power generation, power storage, power consumption data and flexibility values, including: predicting the photovoltaic power generation power corresponding to each unit time within the future preset time based on meteorological data and historical power generation data within the future preset time; predicting the power demand power corresponding to each unit time within the future preset time based on the user's historical usage behavior; for each unit time within the future preset time, determining the power prediction value to be reduced based on the photovoltaic power prediction value, energy storage module remaining power prediction value and power demand prediction value corresponding to the unit time, and calculating the product of the power demand power prediction value corresponding to the unit time and the flexibility value to obtain the maximum power prediction value allowed for control; and taking the minimum value between the power prediction value to be reduced and the maximum power prediction value as the predicted control power corresponding to the unit time.

[0084] Specifically, for each unit time within the preset future time, the predicted value of the remaining power of the energy storage module corresponding to the unit time is calculated minus the reserved power to obtain the predicted value of the available power of the energy storage module corresponding to the unit time; the predicted value of the available power of the energy storage module is calculated and divided by the length of the unit time to obtain the predicted value of the average power that the energy storage module can provide within the unit time; the sum of the predicted value of the photovoltaic power generation corresponding to the unit time and the predicted value of the average power is calculated to obtain the predicted value of the available power of the system corresponding to the unit time; if the predicted value of the power demand corresponding to the unit time is greater than the predicted value of the available power of the system, the predicted value of the power demand corresponding to the unit time is calculated minus the predicted value of the available power of the system to obtain the predicted value of the power to be reduced corresponding to the unit time; if the predicted value of the power demand corresponding to the unit time is less than or equal to the predicted value of the available power of the system, the predicted value of the power to be reduced corresponding to the unit time is determined to be 0. Then, the minimum value between the predicted value of the power to be reduced and the predicted value of the maximum power allowed to be regulated within the unit time is taken as the predicted regulated power corresponding to the unit time.

[0085] If the predicted control powers corresponding to adjacent unit times are equal, they can be merged. For example, the unit time is 15 minutes, the predicted control power from 9:00 to 9:15 is A, and the predicted control power from 9:15 to 9:30 is also A. Then it can be considered that the control period corresponding to the predicted control power A is 9:00 to 9:30, that is, the control duration of the predicted control power A is 30 minutes from 9:00 to 9:30.

[0086] This implementation method can obtain the initial control instructions within a preset future time in advance based on the prediction data, which serve as a reference value for control, indicate the control direction to the system, and ensure the normal operation of the system.

[0087] The prediction of photovoltaic power generation, the prediction of the remaining power of the energy storage module, and the prediction of the power demand can all be achieved using existing methods and algorithms, and this embodiment does not limit this. In practical applications, the prediction results can be represented by a curve, with the horizontal axis representing time and the vertical axis representing the predicted value, for example, one point every 15 minutes.

[0088] In one embodiment, the predicted control power corresponding to the next control period in the preliminary control instruction is corrected according to the actual control power to determine the target control power, including: comparing the actual control power and the predicted control power; if the actual control power is less than or equal to the predicted control power, using the predicted control power as the target control power; if the actual control power is greater than the predicted control power, using the actual control power as the target control power.

[0089] This implementation takes the maximum value of the actual control power and the predicted control power as the final target control power. On the premise of meeting the flexible control requirements, it cuts as much load power as possible to reduce the demand for electric energy, thereby effectively ensuring the stability of system operation.

[0090] In one embodiment, before calculating the actual control power required for the next control period based on the current actual power generation, power storage, power consumption data and the flexibility value corresponding to the next control period, it also includes: judging whether the current actual remaining power of the energy storage module is greater than the reserved power; if the current actual remaining power of the energy storage module is greater than the reserved power, directly calculating the actual control power required for the next control period; if the current actual remaining power of the energy storage module is not greater than the reserved power, prohibiting the energy storage module from discharging, and adjusting the load power to be less than the current actual photovoltaic power generation power, until the remaining power of the energy storage module is greater than the preset power, at which time the actual control power required for the next control period can be calculated.

[0091] The preset power is greater than the reserved power. The preset power can be set according to actual conditions. For example, the reserved power is 20% of the total capacity of the energy storage module, and the preset power is 30% of the total capacity of the energy storage module.

[0092] In this implementation, when the actual remaining power of the energy storage module is less than the reserved power, the load power is reduced to be less than the photovoltaic power generation power, so that the surplus photovoltaic power generation can charge the energy storage module, thereby increasing the power of the energy storage module. The preset power is greater than the reserved power to ensure the existence of a buffer zone and avoid the control process from falling into an infinite loop.

[0093] In this embodiment, the user can set the flexibility value according to actual needs. Specifically, the above method may also include: setting the flexibility values ​​for different time periods in response to the first user setting instruction. In actual applications, the user can set the flexibility values ​​for different time periods in the future preset time in advance. For example, the user sets the flexibility values ​​for different time periods tomorrow in advance today. Exemplarily, for the time period with important guests, the flexibility value is set to 0, for the time period when no one is at home, the flexibility value is set to 1, and for the time period when the user is at home, the flexibility value is set to 0.5. This embodiment allows the user to set the flexibility value (i.e., the control threshold) of the flexible load according to personal preferences or specific needs, providing a more personalized power supply solution and significantly improving the user's power usage experience.

[0094] In this embodiment, the user can set the priority of each flexible load according to actual needs to determine the load regulation order, meet the user's power demand, and ensure user experience. Specifically, the above method may also include: in response to the second user setting instruction, setting the priority of the flexible load, and giving priority to reducing the power of the flexible load with a low priority. The lower the priority of the flexible load, the lower the user's demand for the flexible load, and the power of the flexible load is given priority.

[0095] For example, the flexible loads are divided into four categories, corresponding to four priorities, from high to low: basic security loads such as sensors (such as temperature sensors, humidity sensors, voltage and current sampling sensors, etc. that require constant power supply), environmental security loads such as access control and cameras, functional loads such as indoor lighting and water purifiers that meet the needs of life, work, and production, and comfort loads such as air conditioners. Of course, the specific needs of different users are different. For example, some users think that air conditioning is more important and can set air conditioning to a higher priority.

[0096] Exemplarily, when the target regulation power is greater than the load power of the lowest priority flexible load, the lowest priority flexible load is turned off, and the power of higher priority flexible loads is reduced or turned off in turn until the reduced power reaches the target regulation power to meet the power regulation requirements.

[0097] In one embodiment, at least one power control gear can be set for the flexible load. The flexible load is controlled according to the target control power in the next control period, including: for the flexible load that needs to be controlled and does not need to be shut down, the power control gear closest to the power value to be adjusted under the flexible load is determined, and the power of the flexible load is reduced according to the determined power control gear. This embodiment directly controls the flexible load according to the closest power control gear, and the control is simple and easy to implement.

[0098] The power control gear can be set according to the percentage of the rated power of the load. For example, for the air conditioner, its power control gear is set to: 75% rated power, 50% rated power, 25% rated power. For example, at this time, the air conditioner needs to reduce the power. If the power value to be adjusted is closest to 25% of the rated power of the air conditioner and the current actual power of the air conditioner is greater than 25% of its rated power, the rated power of the air conditioner is directly reduced by 25%.

[0099] Example 2

[0100] Based on the above embodiments, this embodiment provides a specific implementation of an isolated solar-storage direct-flexible system and a control method thereof. The explanation of terms that are the same or corresponding to the above embodiments will not be repeated in this embodiment. This specific embodiment is only for better illustrating the present application and does not constitute an improper limitation on the present application.

[0101] like Figure 2 As shown, it is a schematic diagram of the architecture of an isolated grid-type photovoltaic storage direct flexible energy station with flexible load control function. The isolated grid-type photovoltaic storage direct flexible energy station includes: photovoltaic power generation components 11, photovoltaic inverters 12, energy storage modules 21, energy storage inverters 22, DC load switches 31, distribution inverters 32, AC load switches 41, grid-side inverters 42 and energy management systems.

[0102] The photovoltaic power generation component 11 is used for photovoltaic power generation. The energy storage module 21 is used to store excess electrical energy. The DC load switch 31 and the AC load switch 41 are used as interface units for flexible loads to access electrical equipment that can adjust power. The DC load switch 31 is used to access DC loads, and the AC load switch 41 is used to access AC loads. The photovoltaic inverter 12, the energy storage inverter 22, the distribution inverter 32 and the grid-side inverter 42 are used to perform the current conversion required by the system. The energy management system (not shown in the figure) is responsible for the monitoring and control of the entire isolated photovoltaic storage direct-flexible system. The isolated photovoltaic storage direct-flexible system realizes communication by means of power line carrier and other methods.

[0103] In order to achieve flexible load control, the energy management system will predict power generation, power storage, and power consumption data. For example, it uses meteorological data and historical power generation data to predict photovoltaic power generation through machine learning algorithms, predicts the power demand of flexible loads through historical user behavior, and predicts the power of energy storage modules in combination with photovoltaic power generation forecasts and power demand forecasts. The energy management system will also monitor the actual operating data of the entire isolated photovoltaic storage direct-flexible system in real time. For example, it obtains real-time data on photovoltaic power generation during the day, uses BMS to monitor the remaining power, health status, and charging and discharging status of energy storage modules in real time, and uses smart meters to monitor the power consumption of flexible loads in real time, and adjusts the load according to actual needs.

[0104] In the human-computer interaction interface of the energy management system, there is a setting entry for the flexibility value of the flexible load, which allows users to set the flexible load regulation threshold according to personal preferences or actual needs. For example, when the flexibility value is zero, it means that the user does not make flexible load regulation, when the flexibility value is 100%, it means that the user makes flexible load regulation, and when the flexibility value is 50%, it means that the user can accept half of the power regulation of the flexible load. Users can set the flexibility value to zero when there are important guests, set the flexibility value to 100% when no one is at home, and set the flexibility value to 50% when they are at home.

[0105] The following takes the preset time of 1 day as an example to illustrate the flexible load control process, that is, day-ahead prediction and intraday control are performed, and the user sets the intraday flexibility value on the day-ahead. The energy management system performs day-ahead prediction based on photovoltaic power generation, remaining power of energy storage modules, load demand power and flexibility value, and performs real-time data calculation within the day to determine the load power P (control) and control duration T (control) that need to be controlled, that is, to determine the target control power and its control period, and automatically issue control instructions to the corresponding flexible load, such as adjusting the air conditioning operating power, adjusting the light brightness, suspending the operation of non-critical equipment, etc.

[0106] like Figure 3 The figure shows the flexible control process of an isolated solar-storage direct-flexible energy station, which includes the following steps:

[0107] S301, start.

[0108] S302, the user sets the flexibility value F(load) of the flexible load.

[0109] S303, the energy management system collects photovoltaic power generation power and energy storage module status in real time.

[0110] S304, determine whether the energy storage SOC is greater than 20%, if so, enter S305, if not, enter S315. SOC is the abbreviation of State of Charge, which means the state of charge or the remaining power.

[0111] S305, calculating the load power to be regulated and the regulation duration. For the specific calculation process, refer to the subsequent steps S306 to S313.

[0112] S306, obtaining the predicted control power for the corresponding time period predicted a day ago.

[0113] Specifically, the energy storage module reserves 20% of the power for emergency use. When forecasting on the day before, the forecast value of the available power of the energy storage module is:

[0114] E(available_forecast)=E(ess_forecast)-E(ess, min),

[0115] E(ess,min)=20%×E(total),

[0116] Among them, E(available_forecast) represents the predicted value of available power of the energy storage module, E(ess_forecast) represents the predicted value of remaining power of the energy storage module, E(ess, min) represents the reserved power of the energy storage module, and E(total) represents the total capacity of the energy storage module.

[0117] The system available power forecast value is: P(available_forecast) = P(pv_forecast) + E(available_forecast) / T(control), where P(available_forecast) represents the system available power forecast value, P(pv_forecast) represents the photovoltaic power forecast value, and E(available_forecast) / T(control) represents the average power forecast value that the energy storage module can provide within the control duration T(control). T(control) can take 15 minutes as a regulation time unit, and repeat it over and over again, that is, T(control) includes at least one 15 minutes.

[0118] The predicted power to be cut is:

[0119] P(reduce_forecast)=L(base_forecast)-P(available_forecast), wherein P(reduce_forecast) represents the predicted value of power to be reduced, and L(base_forecast) represents the predicted value of power demand.

[0120] If L(base_forecast)≤P(available_forecast), then P(reduce_forecast)=0.

[0121] The predicted control power is: P(control_forecast)=min[P(reduce_forecast), F(load)×L(base_forecast)], where P(control_forecast) represents the predicted control power, F(load) represents the flexibility value, and F(load)×L(base_forecast) represents the maximum power prediction value allowed for control.

[0122] S307, calculating the available power of the energy storage module that can be used for regulation in real time during the day.

[0123] S308, calculating the system available power in real time during the day.

[0124] S309, calculating in real time the power that needs to be cut from the flexible load (ie, the power to be cut) during the day.

[0125] S310, calculating the actual control power according to the flexibility value.

[0126] Specifically, E(available_real)=E(ess_real)-E(ess, min),

[0127] P(available_real)=P(pv_real)+E(available_real) / T(control),

[0128] P(reduce_real)=L(base_real)-P(available_real),

[0129] P(control_real)=min[P(reduce_real), F(load)×L(base_real)],

[0130] Among them, E(available_real) represents the available power of the energy storage module, E(ess_real) represents the remaining power of the energy storage module, E(ess, min) represents the reserved power of the energy storage module, P(available_real) represents the system available power, P(pv_real) represents the photovoltaic power generation power, E(available_real) / T(control) represents the average power that the energy storage module can provide within the control duration T(control), T(control) can take 15 minutes as an adjustment time unit, and repeat again and again, that is, T(control) includes at least one 15 minutes.

[0131] P(reduce_real) represents the power to be reduced, L(base_real) represents the load demand power, if L(base_real)≤P(available_real), then P(reduce_real)=0.

[0132] P(control_real) represents the actual control power, F(load) represents the flexibility value, and F(load)×L(base_real) represents the maximum power allowed for control.

[0133] S311, determine whether the actual control power ≤ predicted control power is satisfied. If so, proceed to S312, if not, proceed to S313.

[0134] S312, taking the predicted control power as the target control power.

[0135] S313: Taking the actual regulated power as the target regulated power.

[0136] That is, if P(control_real)≤P(control_forecast), then P(control)=P(control_forecast); if P(control_real)>P(control_forecast), then P(control)=P(control_real). P(control) represents the target control power.

[0137] S314, issuing control instructions to the load.

[0138] S315, discharging of the energy storage module is prohibited.

[0139] S316, issuing a control instruction to the load, so that the load power is less than the photovoltaic power generation power.

[0140] S317, determine whether the energy storage SOC>30% is satisfied, if so, proceed to S305, if not, return to S316.

[0141] Calculations based on forecast data in advance can provide an initial plan or reference value for tomorrow's intraday regulation. Due to the intermittent and uncertain nature of renewable energy sources such as solar energy and the possible changing load demand, this day-ahead instruction usually needs to be adjusted and corrected based on new real-time data. Intraday real-time data is used to adjust or correct the regulation instructions based on day-ahead forecasts, thereby being able to more flexibly respond to the volatility and uncertainty of renewable energy and ensure that the system makes the most appropriate regulation decisions based on the latest data.

[0142] Exemplarily, the flexible loads are divided into four categories, and the priorities of the four categories of loads are from high to low: basic security loads such as sensors, environmental security loads such as access control and cameras, functional loads such as indoor lighting and water purifiers that meet the needs of life, work, production, etc., and comfort loads such as air conditioners. Comfort loads such as air conditioners are divided into three levels of power control, such as 75% air conditioner power, 50% air conditioner power, and 25% air conditioner power, to achieve clear flexible control rules. For example, when the load power that needs to be controlled is calculated to be closest to 25% air conditioner power, it is adjusted at 25% air conditioner power; when the load power that needs to be controlled is calculated to be closest to 50% air conditioner power, it is adjusted at 50% air conditioner power; when the load power that needs to be controlled is calculated to be closest to 75% air conditioner power, it is adjusted at 75% air conditioner power; when the load power that needs to be controlled is calculated to be greater than the air conditioner load power, the comfort loads such as air conditioners are cut off, and the functional loads, environmental security loads, and basic security loads are cut off in turn to meet the load power that needs to be controlled.

[0143] The isolated grid-type photovoltaic storage direct flexible energy station of this embodiment can perform day-ahead forecasting and intraday real-time monitoring of power generation, power storage, and power consumption, and supports users to set flexibility values. By comprehensively considering the three key elements of photovoltaic power generation output, remaining power of the energy storage module, and flexibility value set by the flexible load, the control instructions (including the duration and control power of the flexible load control) are accurately calculated and issued to ensure the stability and reliability of the system operation. In addition, the flexibility value can be adjusted according to the specific needs and preferences of the user to provide a more personalized power supply solution and significantly improve the user's power usage experience. Through flexible load control, the isolated grid-type photovoltaic storage direct flexible energy station can adjust the power demand on the load side in real time according to the output changes and energy storage status of the power generation side, thereby reducing system fluctuations, responding more flexibly to the volatility and uncertainty of renewable energy, ensuring that the system makes the most appropriate control decisions, and can more effectively utilize its limited resources and reduce dependence on expensive standby power generation equipment, thereby reducing operating costs and improving economy.

[0144] Example 3

[0145] Based on the same inventive concept, this embodiment provides an isolated solar-storage direct-flexible system control device, which can be used to implement the isolated solar-storage direct-flexible system control method described in the above embodiment. The isolated solar-storage direct-flexible system control device can be implemented by software and / or hardware.

[0146] Figure 4 is a structural block diagram of an isolated solar-storage direct-flexible system control device provided by an embodiment of the present invention, such as Figure 4 As shown, the control device of the isolated solar-storage direct-flexible system includes:

[0147] The calculation module 401 is used to calculate the actual control power required for the next control period according to the current actual power generation, power storage, power consumption data and the flexibility value corresponding to the next control period;

[0148] The correction module 402 is used to correct the predicted control power corresponding to the next control period in the preliminary control instruction according to the actual control power to determine the target control power, wherein the preliminary control instruction for a preset time in the future is generated in advance according to the predicted power generation, power storage, power consumption data and flexibility value, and the preliminary control instruction includes multiple predicted control powers and their corresponding control periods;

[0149] The control module 403 is used to control the flexible load according to the target control power in the next control period.

[0150] Optionally, the calculation module 401 includes:

[0151] A first determination unit is used to determine the system available power according to the current actual photovoltaic power generation power and the remaining power of the energy storage module;

[0152] A second determining unit is used to determine the power to be cut according to the current actual load demand power and the system available power, wherein the power to be cut is the power that needs to be cut from the flexible load;

[0153] A third determining unit is used to calculate the product of the current actual load demand power and the flexibility value corresponding to the next regulation period to obtain the maximum power allowed for regulation;

[0154] The fourth determining unit is used to determine the actual regulated power according to the power to be cut and the maximum power allowed to be regulated.

[0155] Optionally, the first determining unit includes:

[0156] The first calculation subunit is used to calculate the current actual remaining power of the energy storage module minus the reserved power to obtain the available power of the energy storage module;

[0157] A second calculation subunit is used to calculate the available power of the energy storage module and divide it by the duration of the next regulation period to obtain the average power that the energy storage module can provide in the next regulation period;

[0158] The third calculation subunit is used to calculate the sum of the current actual photovoltaic power generation power and the average power to obtain the system available power.

[0159] Optionally, the second determining unit includes:

[0160] A first comparison subunit, used for comparing the current actual load demand power with the available power of the system;

[0161] A first determining subunit is configured to calculate the current actual load demand power minus the system available power to obtain the power to be reduced if the current actual load demand power is greater than the system available power;

[0162] The second determining subunit is used to determine that the power to be reduced is 0 if the current actual load demand power is less than or equal to the system available power.

[0163] Optionally, the fourth determining unit includes:

[0164] A second comparing subunit, used for comparing the power to be reduced with the maximum power allowed to be regulated;

[0165] A third determining subunit is configured to use the power to be reduced as the actual regulated power if the power to be reduced is less than the maximum power allowed to be regulated;

[0166] The fourth determining subunit is configured to use the maximum power allowed to be regulated as the actual regulated power if the power to be reduced is greater than or equal to the maximum power allowed to be regulated.

[0167] Optionally, the above-mentioned isolated solar-storage-direct-flexible system control device also includes: a generation module, which is used to generate preliminary control instructions for a future preset time in advance based on the predicted power generation, power storage, power consumption data and flexibility value.

[0168] The generated modules include:

[0169] A first prediction unit, configured to predict the photovoltaic power generation corresponding to each unit time within the future preset time according to the meteorological data and the historical power generation data within the future preset time;

[0170] The second prediction unit is used to predict the power demand corresponding to each unit time in the future preset time according to the user's historical usage behavior;

[0171] a calculation unit, for determining, for each unit time within the preset future time, a predicted value of power to be reduced according to a predicted value of photovoltaic power generation, a predicted value of remaining power of the energy storage module, and a predicted value of power demand corresponding to the unit time, and calculating the product of the predicted value of power demand corresponding to the unit time and the flexibility value to obtain a predicted value of maximum power allowed to be regulated;

[0172] The fifth determining unit is used to take the minimum value between the predicted value of the power to be reduced and the predicted value of the maximum power as the predicted control power corresponding to the unit time.

[0173] Optionally, the correction module 402 includes:

[0174] A comparison unit, used for comparing the actual regulated power with the predicted regulated power;

[0175] a sixth determining unit, configured to use the predicted regulating power as the target regulating power if the actual regulating power is less than or equal to the predicted regulating power;

[0176] A seventh determination unit is configured to use the actual control power as the target control power if the actual control power is greater than the predicted control power.

[0177] Optionally, the above-mentioned isolated solar-storage direct-flexible system control device further includes:

[0178] A judgment module, used to judge whether the current actual remaining power of the energy storage module is greater than the reserved power before calculating the actual control power required for the next control period according to the current actual power generation, power storage, power consumption data and the flexibility value corresponding to the next control period;

[0179] The processing module is used to prohibit the energy storage module from discharging if the current actual remaining power of the energy storage module is not greater than the reserved power, and adjust the load power to be less than the current actual photovoltaic power generation power until the remaining power of the energy storage module is greater than the preset power, wherein the preset power is greater than the reserved power.

[0180] Optionally, the above-mentioned isolated solar-storage direct-flexible system control device further includes:

[0181] The setting module is used to set the flexibility values ​​of different time periods in response to the first user setting instruction; and / or, in response to the second user setting instruction, set the priority of the flexible load and give priority to reducing the power of the low-priority flexible load.

[0182] Optionally, at least one power control gear is set for the flexible load; the control module 403 is specifically used to: for a flexible load that needs to be regulated and does not need to be shut down, determine the power control gear that is closest to the power value to be adjusted under the flexible load, and reduce the power of the flexible load according to the determined power control gear.

[0183] The above-mentioned isolated solar-storage direct-flexible system control device can execute the isolated solar-storage direct-flexible system control method provided by the embodiment of the present invention, and has the corresponding functional modules and beneficial effects of the execution method. For technical details not described in detail in this embodiment, please refer to the isolated solar-storage direct-flexible system control method provided by the embodiment of the present invention.

[0184] Example 4

[0185] This embodiment provides an isolated solar-storage-direct-flexible system, including: the isolated solar-storage-direct-flexible system control device described in the above embodiment.

[0186] Example 5

[0187] This embodiment provides a non-volatile computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the control method of the isolated solar-storage direct-flexible system described in the above embodiment is implemented.

[0188] Example 6

[0189] This embodiment provides an electronic device, including: a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the control method of the isolated island photovoltaic storage direct-flexible system described in the above embodiment is implemented.

[0190] Figure 5 is a schematic diagram of the hardware structure of an electronic device provided by an embodiment of the present invention, such as Figure 5 As shown, the electronic device includes:

[0191] One or more processors 510 and memory 520, Figure 5 A processor 510 is taken as an example.

[0192] The electronic device may further include: an input device 530 and an output device 540 .

[0193] The processor 510, the memory 520, the input device 530 and the output device 540 may be connected via a bus or other means. Figure 5 The example of connecting through bus is taken in the following.

[0194] The memory 520, as a non-volatile computer-readable storage medium, can be used to store non-volatile software programs, non-volatile computer executable programs and modules, such as program instructions / modules corresponding to the control method of the isolated solar-storage direct-flexible system in the embodiment of the present invention. The processor 510 executes various functional applications and data processing by running the non-volatile software programs, instructions and modules stored in the memory 520, that is, realizing the above-mentioned control method of the isolated solar-storage direct-flexible system.

[0195] The memory 520 may include a program storage area and a data storage area, wherein the program storage area may store an application required for operating the device and at least one function; the data storage area may store historical data, predicted data, etc. In addition, the memory 520 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk storage device, a flash memory device, or other non-volatile solid-state storage devices.

[0196] The input device 530 can receive input digital or character information and generate key signal input related to user settings and function control of the electronic device. The output device 540 can include a display device such as a display screen.

[0197] The one or more modules are stored in the memory 520, and when executed by the one or more processors 510, the above-mentioned isolated solar-storage direct-flexible system control method is executed.

[0198] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0199] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0200] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A control method for an isolated solar-storage direct-flexible system, characterized in that: include: Calculate the actual control power required for the next control period according to the current actual power generation, power storage, power consumption data and the flexibility value corresponding to the next control period; According to the actual control power, the predicted control power corresponding to the next control period in the preliminary control instruction is corrected to determine the target control power, wherein the preliminary control instruction for a preset time in the future is generated in advance according to the predicted power generation, power storage, power consumption data and flexibility value, and the preliminary control instruction includes multiple predicted control powers and their corresponding control periods; The flexible load is regulated according to the target regulation power during the next regulation period.

2. The method according to claim 1, characterized in that According to the current actual power generation, power storage, power consumption data and the flexibility value corresponding to the next control period, the actual control power required for the next control period is calculated, including: Determine the system available power based on the actual current photovoltaic power generation and the remaining power of the energy storage module; Determine the power to be cut according to the current actual load demand power and the system available power, wherein the power to be cut is the power that needs to be cut from the flexible load; Calculate the product of the current actual load demand power and the flexibility value corresponding to the next regulation period to obtain the maximum power allowed for regulation; The actual regulated power is determined according to the power to be cut and the maximum power allowed to be regulated.

3. The method according to claim 2, characterized in that The system available power is determined based on the actual current photovoltaic power generation and the remaining power of the energy storage module, including: Calculate the current actual remaining power of the energy storage module minus the reserved power to obtain the available power of the energy storage module; Calculate the available power of the energy storage module and divide it by the duration of the next regulation period to obtain the average power that the energy storage module can provide in the next regulation period; The sum of the current actual photovoltaic power generation power and the average power is calculated to obtain the system available power.

4. The method according to claim 2, characterized in that: The power to be cut is determined according to the current actual load demand power and the system available power, including: Comparing the current actual load demand power with the available power of the system; If the current actual load demand power is greater than the system available power, the current actual load demand power minus the system available power is calculated to obtain the power to be reduced; If the current actual load demand power is less than or equal to the system available power, the power to be reduced is determined to be 0.

5. The method according to claim 2, characterized in that: Determining the actual regulated power according to the power to be reduced and the maximum power allowed to be regulated includes: Comparing the power to be reduced with the maximum power allowed to be regulated; If the power to be reduced is less than the maximum power allowed to be regulated, the power to be reduced is used as the actual regulated power; If the power to be reduced is greater than or equal to the maximum power allowed to be regulated, the maximum power allowed to be regulated is used as the actual regulated power.

6. The method according to claim 1, characterized in that Generate preliminary control instructions for future preset times in advance based on predicted power generation, storage, power consumption data and flexibility values, including: Predicting the photovoltaic power generation corresponding to each unit time in the future preset time according to the meteorological data and historical power generation data in the future preset time; Predicting the power demand corresponding to each unit time in the future preset time based on the user's historical usage behavior; For each unit time within the preset future time, the power prediction value to be reduced is determined according to the photovoltaic power prediction value, the energy storage module remaining power prediction value and the power demand prediction value corresponding to the unit time, and the product of the power demand prediction value and the flexibility value corresponding to the unit time is calculated to obtain the maximum power prediction value allowed to be regulated; The minimum value between the predicted value of the power to be reduced and the predicted value of the maximum power is used as the predicted control power corresponding to the unit time.

7. The method according to claim 1, characterized in that The predicted control power corresponding to the next control period in the preliminary control instruction is corrected according to the actual control power to determine the target control power, including: Comparing the actual regulated power with the predicted regulated power; If the actual control power is less than or equal to the predicted control power, the predicted control power is used as the target control power; If the actual control power is greater than the predicted control power, the actual control power is used as the target control power.

8. The method according to any one of claims 1 to 7, characterized in that Before calculating the actual control power required for the next control period according to the current actual power generation, power storage, power consumption data and the flexibility value corresponding to the next control period, the method further includes: Determine whether the actual remaining power of the energy storage module is greater than the reserved power; If the current actual remaining power of the energy storage module is not greater than the reserved power, the energy storage module is prohibited from discharging, and the load power is adjusted to be less than the current actual photovoltaic power generation power until the remaining power of the energy storage module is greater than the preset power, wherein the preset power is greater than the reserved power.

9. The method according to any one of claims 1 to 7, characterized in that Also includes: In response to a first user setting instruction, setting flexibility values ​​for different time periods; and / or, In response to the second user setting instruction, priorities are set for the flexible loads, and the power of the flexible loads with low priorities is preferentially cut.

10. The method according to any one of claims 1 to 7, characterized in that Setting at least one power control gear for flexible loads; The flexible load is regulated according to the target regulated power in the next regulation period, including: For a flexible load that needs to be regulated and does not need to be shut down, a power regulation level that is closest to the power value to be regulated under the flexible load is determined, and the power of the flexible load is reduced according to the determined power regulation level.

11. A control device for an isolated solar-storage direct-flexible system, characterized in that: include: A calculation module, used to calculate the actual control power required for the next control period according to the current actual power generation, power storage, power consumption data and the flexibility value corresponding to the next control period; A correction module, used for correcting the predicted control power corresponding to the next control period in the preliminary control instruction according to the actual control power to determine the target control power, wherein the preliminary control instruction for a preset time in the future is generated in advance according to the predicted power generation, power storage, power consumption data and flexibility value, and the preliminary control instruction includes multiple predicted control powers and their corresponding control periods; The control module is used to control the flexible load according to the target control power in the next control period.

12. An isolated island solar-storage direct-flexible system, characterized in that: include: The control device for the isolated solar-storage direct-flexible system as described in claim 11.

13. An electronic device, comprising: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the control method for an isolated island photovoltaic storage direct-flexible system according to any one of claims 1 to 10 when executing the computer program.

14. A non-volatile computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the control method of an isolated island photovoltaic energy storage direct-flexible system according to any one of claims 1 to 10 is implemented.

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