A control method, device, system and medium of a light storage direct-flexible system

Abstract

The present invention relates to a control method, device, system and medium of a photovoltaic, storage, direct and flexible system, wherein the method comprises: calculating the adjustable capacity of the photovoltaic, storage, direct and flexible system, and uploading the adjustable capacity to the power grid cloud master station; judging whether a demand response control instruction of the power grid cloud master station is received, and if a demand response control instruction is received, controlling the operation of the equipment modules in the photovoltaic, storage, direct and flexible system according to the demand response mode strategy; if no demand response control instruction is received, controlling the equipment modules in the photovoltaic, storage, direct and flexible system to maintain the current operation mode. The present invention can realize the efficient interaction between the photovoltaic, storage, direct and flexible system and the power grid, and ensure the green, flexible and efficient optimized operation of the photovoltaic, storage, direct and flexible system.

Description

Technical Field

[0001] The present invention relates to the technical field of direct current microgrids, and in particular to a control method, device, system and medium for a photovoltaic-storage direct-flexible system. Background Art

[0002] The photovoltaic-storage-direct-flexible system is a DC microgrid system that uses photovoltaic power generation and energy storage equipment to participate in the flexible regulation of loads. It has been widely used in the fields of new buildings and zero-carbon buildings due to its advantages such as cleanliness, low carbon and high efficiency. The photovoltaic-storage-direct-flexible system uses a DC bus to connect photovoltaic power generation, energy storage and flexible loads, and achieves the goal of flexible regulation and interaction with the power grid through intelligent control. It can enable users such as buildings to change from simple electricity use and passive energy-saving modes to clean, efficient and flexible generation, storage and coordinated operation modes. Therefore, promoting the application of photovoltaic-storage-direct-flexible systems is an important technical route to promote the development of new building systems and zero-carbon buildings. At present, the control functions of photovoltaic power generation systems, energy storage battery systems and controllable flexible electrical equipment are relatively traditional, and cannot achieve full interaction with the power grid and give full play to the deep adjustable potential of photovoltaic-storage-direct-flexible systems. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a control method, device, system and medium for a photovoltaic, storage, direct and flexible system, which can realize efficient interaction between the photovoltaic, storage, direct and flexible system and the power grid, and ensure the green, flexible and efficient optimized operation of the photovoltaic, storage, direct and flexible system.

[0004] The technical solution adopted by the present invention to solve the technical problem is: to provide a control method for a solar-storage direct-flexible system, comprising the following steps:

[0005] Calculate the adjustable capacity of the PV-storage direct-flexible system and upload the adjustable capacity to the power grid cloud master station;

[0006] Determine whether the demand response control instructions from the power grid cloud master station are received. If the demand response control instructions are received, the operation of the equipment modules in the photovoltaic storage direct and flexible system is controlled according to the demand response mode strategy; if the demand response control instructions are not received, the equipment modules in the photovoltaic storage direct and flexible system are controlled to maintain the current operation mode.

[0007] The calculation of the adjustable capacity of the solar-storage direct-flexible system specifically includes:

[0008] Calculate the adjustable energy storage capacity of the solar-storage direct-flexible system;

[0009] Calculate the adjustable capacity of DC appliances in the photovoltaic-storage-direct-flexible system;

[0010] Calculate the adjustable capacity of the DC charging pile of the photovoltaic storage system;

[0011] Calculate the adjustable capacity of the DC air conditioner in the solar-storage direct-flexible system;

[0012] The adjustable capacity of the photovoltaic, storage, direct-current and flexible system is obtained by summing up the adjustable energy storage capacity, the adjustable capacity of DC appliances, the adjustable capacity of DC charging piles, and the adjustable capacity of DC air conditioners.

[0013] The calculation of the adjustable energy storage capacity of the photovoltaic storage direct-flexible system specifically includes:

[0014] Determine whether the energy storage battery in the energy storage module of the solar-storage direct-flexible system is in a charging state;

[0015] If the energy storage battery is in a charging state, the power generation of the photovoltaic power generation unit in the photovoltaic storage direct and flexible system is measured;

[0016] Determine whether the power generation of the photovoltaic power generation unit is less than the set power generation value;

[0017] If the power generation of the photovoltaic power generation unit is less than the power generation setting value, it is determined whether the SOC of the energy storage battery is greater than or equal to the SOC setting value;

[0018] If the SOC of the energy storage battery is less than the SOC setting value, the adjustable capacity of the energy storage is the charging power of the energy storage battery;

[0019] If the energy storage battery is not in a charging state, or the power generation power of the photovoltaic power generation unit is greater than or equal to the power generation power setting value, or the SOC of the energy storage battery is greater than or equal to the SOC setting value, the adjustable energy storage capacity is zero.

[0020] The calculation of the adjustable capacity of the DC appliance of the photovoltaic-storage-direct-flexible system specifically includes:

[0021] Determine whether the DC appliances in the flexible load module of the solar-storage-direct-flexible system are in operation;

[0022] If the DC appliance is in operation, the adjustable capacity of the DC appliance is the product of the operating power of the DC appliance and the proportion of the DC appliance's allowed reduced operating power to the total operating power;

[0023] If the DC appliance is not in operation, the adjustable capacity of the DC appliance is zero.

[0024] The calculation of the adjustable capacity of the DC charging pile of the photovoltaic storage direct-flexible system specifically includes:

[0025] Determine whether the DC charging pile in the flexible load module of the solar-storage DC-flexible system is in operation;

[0026] If the DC charging pile is in operation, the adjustable capacity of the DC charging pile is the product of the operating power of the DC charging pile and the proportion of the operating power that the DC charging pile is allowed to adjust downward to the total operating power;

[0027] If the DC charging pile is not in operation, the adjustable capacity of the DC charging pile is zero.

[0028] The calculation of the adjustable capacity of the DC air conditioner of the photovoltaic energy storage direct-flexible system specifically includes:

[0029] Determine whether the DC air conditioner in the flexible load module of the solar-storage direct-flexible system is in operation;

[0030] If the DC air conditioner is in operation, the adjustable capacity of the DC air conditioner is the operating power reduced by the DC air conditioner after the set temperature of the DC air conditioner is increased to a preset value or the wind speed level is reduced;

[0031] If the DC air conditioner is not in operation, the adjustable capacity of the DC air conditioner is zero.

[0032] The control of the operation of the equipment modules in the solar-storage direct-flexible system according to the demand response mode strategy specifically includes:

[0033] Determine whether the adjustable energy storage capacity is greater than zero; if the adjustable energy storage capacity is greater than zero, control the energy storage battery in the energy storage module of the solar-storage direct-flexible system to stop charging;

[0034] Determine whether the adjustable capacity of the DC device is greater than zero, and whether the responded capacity is less than the grid demand capacity; if the adjustable capacity of the DC device is greater than zero, and the responded capacity is less than the grid demand capacity, then control the operating power of the DC device in the flexible load module of the solar-storage direct-flexible system to be reduced to (1-n 电器 ) times the current operating power, where n 电器 It indicates the proportion of the DC electrical appliance's allowed down-regulated operating power to the total operating power;

[0035] Determine whether the adjustable capacity of the DC charging pile is greater than zero, and whether the responded capacity is less than the grid demand capacity; if the adjustable capacity of the DC charging pile is greater than zero, and the responded capacity is less than the grid demand capacity, then control the operating power of the DC charging pile in the flexible load module of the photovoltaic storage direct-flexible system to be reduced to (1-n 充电桩 ) times the current operating power, where n 充电桩 Indicates the proportion of the DC charging pile's allowed operating power to the total operating power;

[0036] Determine whether the adjustable capacity of the DC air conditioner is greater than zero, and whether the responded capacity is less than the grid demand capacity; if the adjustable capacity of the DC air conditioner is greater than zero, and the responded capacity is less than the grid demand capacity, control the DC air conditioner in the flexible load module of the photovoltaic storage direct-flexible system to increase the set temperature by 1°C or reduce the wind speed by one level.

[0037] The technical solution adopted by the present invention to solve the technical problem is: to provide a control device for a solar-storage direct-flexible system, comprising:

[0038] The calculation upload module is used to calculate the adjustable capacity of the PV-storage direct-flexible system and upload the adjustable capacity to the power grid cloud master station;

[0039] The judgment control module is used to determine whether a demand response control instruction is received from the power grid cloud master station. If a demand response control instruction is received, the operation of the equipment modules in the photovoltaic storage direct and flexible system is controlled according to the demand response mode strategy; if no demand response control instruction is received, the equipment modules in the photovoltaic storage direct and flexible system are controlled to maintain the current operation mode.

[0040] The calculation upload module includes:

[0041] The first calculation unit is used to calculate the adjustable energy storage capacity of the photovoltaic storage direct-flexible system;

[0042] The second calculation unit is used to calculate the adjustable capacity of the DC electrical appliances of the photovoltaic storage DC-flexible system;

[0043] The third calculation unit is used to calculate the adjustable capacity of the DC charging pile of the photovoltaic storage direct-flexible system;

[0044] The fourth calculation unit is used to calculate the adjustable capacity of the DC air conditioner of the photovoltaic storage direct-flexible system;

[0045] The summing calculation unit is used to sum the adjustable energy storage capacity of the photovoltaic storage direct-flexible system, the adjustable capacity of the DC appliance, the adjustable capacity of the DC charging pile, and the adjustable capacity of the DC air conditioner to obtain the adjustable capacity of the photovoltaic storage direct-flexible system.

[0046] The first computing unit comprises:

[0047] The energy storage battery judgment unit is used to judge whether the energy storage battery in the energy storage module of the photovoltaic storage direct-flexible system is in a charging state;

[0048] A measuring unit, used to measure the power generation of the photovoltaic power generation unit in the photovoltaic storage direct and flexible system when the energy storage battery is in a charging state;

[0049] A power generation judging unit, used to judge whether the power generation of the photovoltaic power generation unit is less than a set power generation value;

[0050] An SOC judgment unit is used to judge whether the SOC of the energy storage battery is greater than or equal to the SOC setting value when the power generation power of the photovoltaic power generation unit is less than the power generation power setting value;

[0051] The first determination unit is used to determine that the adjustable energy storage capacity is the charging power of the energy storage battery when the SOC of the energy storage battery is less than the SOC setting value; when the energy storage battery is not in a charging state, or the power generation power of the photovoltaic power generation unit is greater than or equal to the power generation power setting value, or the SOC of the energy storage battery is greater than or equal to the SOC setting value, determine that the adjustable energy storage capacity is zero.

[0052] The second computing unit comprises:

[0053] A DC appliance judgment unit is used to judge whether the DC appliance in the flexible load module of the solar-storage direct-flexible system is in operation;

[0054] The second determination unit is used to determine that the adjustable capacity of the DC appliance is the product of the operating power of the DC appliance and the proportion of the DC appliance's allowed downward operating power to the total operating power when the DC appliance is in operation; and to determine that the adjustable capacity of the DC appliance is zero when the DC appliance is not in operation.

[0055] The third computing unit comprises:

[0056] A DC charging pile judgment unit is used to judge whether the DC charging pile in the flexible load module of the photovoltaic storage direct-flexible system is in operation;

[0057] The third determination unit is used to determine that the adjustable capacity of the DC charging pile is the product of the operating power of the DC charging pile and the proportion of the operating power that the DC charging pile is allowed to be reduced to the total operating power when the DC charging pile is in an operating state; when the DC charging pile is not in an operating state, determine that the adjustable capacity of the DC charging pile is zero.

[0058] The fourth calculation unit comprises:

[0059] A DC air conditioning judgment unit is used to judge whether the DC air conditioning in the flexible load module of the solar-storage direct-flexible system is in operation;

[0060] The fourth determination unit is used to determine that the adjustable capacity of the DC air conditioner is the operating power reduced by the DC air conditioner after the set temperature of the DC air conditioner is increased by a preset value or the wind speed is reduced when the DC air conditioner is in operation; when the DC air conditioner is not in operation, determine that the adjustable capacity of the DC air conditioner is zero.

[0061] The judgment control module comprises:

[0062] The first judgment execution unit is used to judge whether the adjustable energy storage capacity is greater than zero, and when the adjustable energy storage capacity is greater than zero, control the energy storage battery in the energy storage module of the photovoltaic storage direct-flexible system to stop charging;

[0063] The second judgment execution unit is used to judge whether the adjustable capacity of the DC appliance is greater than zero and whether the responded capacity is less than the grid demand capacity, and when the adjustable capacity of the DC appliance is greater than zero and the responded capacity is less than the grid demand capacity, control the operation power of the DC appliance in the flexible load module of the solar-storage direct-flexible system to be reduced to (1-n 电器 ) times the current operating power, where n 电器It indicates the proportion of the DC electrical appliance's allowed down-regulated operating power to the total operating power;

[0064] The third judgment execution unit is used to judge whether the adjustable capacity of the DC charging pile is greater than zero and whether the responded capacity is less than the grid demand capacity, and when the adjustable capacity of the DC charging pile is greater than zero and the responded capacity is less than the grid demand capacity, control the operation power of the DC charging pile in the flexible load module of the photovoltaic storage direct-flexible system to be reduced to (1-n 充电桩 ) times the current operating power, where n 充电桩 Indicates the proportion of the DC charging pile's allowed operating power to the total operating power;

[0065] The fourth judgment execution unit is used to judge whether the adjustable capacity of the DC air conditioner is greater than zero, and whether the responded capacity is less than the grid demand capacity. When the adjustable capacity of the DC air conditioner is greater than zero and the responded capacity is less than the grid demand capacity, the DC air conditioner in the flexible load module of the photovoltaic storage direct-flexible system is controlled to increase the set temperature by 1°C or reduce the wind speed by one level.

[0066] The technical solution adopted by the present invention to solve its technical problem is: to provide a photovoltaic storage direct-flexible system, including: the control device of the photovoltaic storage direct-flexible system mentioned above.

[0067] The technical solution adopted by the present invention to solve its technical problem is: providing a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the steps of the control method of the above-mentioned optical storage direct-flexible system are implemented.

[0068] Beneficial Effects

[0069] Due to the adoption of the above-mentioned technical scheme, the present invention has the following advantages and positive effects compared with the prior art: the present invention can calculate the adjustable capacity of the photovoltaic, storage, direct and flexible system in real time, and report it to the power grid cloud master station, receive control instructions from the power grid cloud master station, respond to power grid demand, ensure the green, flexible and efficient optimization operation of the photovoltaic, storage, direct and flexible system, realize the efficient interaction between the photovoltaic, storage, direct and flexible system and the power grid, and fully tap the adjustable potential of the photovoltaic, storage, direct and flexible system. BRIEF DESCRIPTION OF THE DRAWINGS

[0070] Figure 1 It is a schematic structural diagram of a solar-storage direct-flexible system applied in the first embodiment of the present invention;

[0071] Figure 2 is a flow chart of a control method of a solar-storage direct-flexible system according to a first embodiment of the present invention;

[0072] Figure 3 1 is a schematic diagram of the calculation process of the adjustable capacity of the solar-storage direct-flexible system in the first embodiment of the present invention;

[0073] Figure 4 It is a flow chart of the demand response mode strategy in the first embodiment of the present invention. DETAILED DESCRIPTION

[0074] The present invention will be further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms fall within the scope limited by the appended claims of the application equally.

[0075] The first embodiment of the present invention relates to a control method for a solar energy storage direct-flexible system, which can be applied to Figure 1 The photoelectric storage direct-flexible system shown.

[0076] The photovoltaic storage direct-flexible system consists of a DC bus, a photovoltaic power generation module, an energy storage module, a flexible load module, and a photovoltaic storage direct-flexible system controller. The DC bus is connected to the AC grid through a bidirectional AC-DC converter to achieve bidirectional energy flow; the photovoltaic power generation module is composed of a photovoltaic power generation unit and a gallium nitride DC-DC converter. Compared with conventional converters, the gallium nitride converter has the advantages of high temperature resistance, high voltage resistance, and high switching frequency. The photovoltaic power generation unit is unidirectionally connected to the AC bus through a gallium nitride DC-DC module; the energy storage module is composed of an energy storage battery unit and a DC-DC converter. The energy storage battery unit achieves bidirectional energy flow through a bidirectional DC-DC converter and the DC bus; the flexible load module includes a DC air conditioner, a DC charging pile, and a DC appliance. The DC air conditioner and the DC charging pile are directly connected to the DC bus, and the DC appliance is connected to the DC bus through a unidirectional DC-DC converter; the photovoltaic storage direct-flexible system controller can communicate with each module of the photovoltaic storage direct-flexible system, collect the operating information of each module of the photovoltaic storage direct-flexible system, and formulate an optimization strategy to optimize the control of each module of the system. The controller of the PV-storage direct-flexible system can communicate with the power grid cloud master station. The controller calculates the adjustable capacity based on the real-time operating status information of each device module in the system and reports it to the power grid cloud master station. It can also accept demand response instructions from the power grid cloud master station, adjust the operating status of each device in the system, and respond to power grid demand.

[0077] The PV-storage direct-flexible system in this embodiment can communicate with the power grid cloud master station, report the adjustable capacity according to the specified time step, and accept the demand response instructions of the power grid cloud master station to adjust the operating status of each device in the system to respond to the power grid demand. Figure 2 As shown in the figure, the overall control strategy of the PV-storage direct-flexible system is executed once each time within the specified time step, including:

[0078] Step 1: Calculate the adjustable capacity of the PV-storage direct-flexible system and upload the adjustable capacity to the power grid cloud master station.

[0079] The adjustable capacity of the photovoltaic, storage, direct and flexible system at the current time step is composed of the adjustable energy storage capacity, the adjustable capacity of DC appliances, the adjustable capacity of DC charging piles and the adjustable capacity of DC air conditioners at the current time step. Therefore, this step includes: calculating the adjustable energy storage capacity of the photovoltaic, storage, direct and flexible system; calculating the adjustable capacity of DC appliances of the photovoltaic, storage, direct and flexible system; calculating the adjustable capacity of DC charging piles of the photovoltaic, storage, direct and flexible system; calculating the adjustable capacity of DC air conditioners of the photovoltaic, storage, direct and flexible system; summing the adjustable energy storage capacity, the adjustable capacity of DC appliances, the adjustable capacity of DC charging piles and the adjustable capacity of DC air conditioners of the photovoltaic, storage, direct and flexible system to obtain the adjustable capacity of the photovoltaic, storage, direct and flexible system.

[0080] For the convenience of description, in this embodiment, the adjustable capacity of energy storage, the adjustable capacity of DC electrical appliances, the adjustable capacity of DC charging piles, and the adjustable capacity of DC air conditioners correspond to adjustable capacity 1, adjustable capacity 2, adjustable capacity 3, and adjustable capacity 4, respectively. Figure 3 As shown, firstly, the adjustable capacity 1, adjustable capacity 2, adjustable capacity 3, and adjustable capacity 4 are calculated respectively, and then the adjustable capacity of the system is calculated by the following formula:

[0081] Adjustable capacity = adjustable capacity 1 + adjustable capacity 2 + adjustable capacity 3 + adjustable capacity 4

[0082] After calculating the adjustable load within the current time step of the system, the adjustable capacity is reported to the power grid cloud master station.

[0083] Among them, the calculation processes of adjustable capacity 1, adjustable capacity 2, adjustable capacity 3, and adjustable capacity 4 are respectively:

[0084] 1) Adjustable capacity 1: First, determine whether the energy storage battery in the energy storage module of the photovoltaic storage direct and flexible system is in a charging state. If the energy storage battery is charging, determine whether the user chooses to participate in demand response. If the user chooses to participate in regulation, start measuring the power generation of the photovoltaic power generation unit in the photovoltaic storage direct and flexible system; then determine whether the photovoltaic power generation is less than the power generation setting value. If it is less than the setting value, start to determine whether the SOC of the energy storage battery is greater than the setting value SOC up If the energy storage SOC does not reach the set value, the adjustable capacity 1 in the current time step is equal to the energy storage charging power. The energy storage battery is in a non-charging state, or the user chooses not to participate in demand response, or the photovoltaic power generation power is higher than the power generation power setting value, or the energy storage battery SOC is greater than the set value SOC up , the adjustable capacity 1 is zero.

[0085] 2) Adjustable capacity 2: First, determine whether the DC device in the flexible load module of the PV-storage-DC-flexible system is in operation. If the DC device is in operation, determine whether the user chooses to participate in demand response. If the user chooses to participate, the adjustable capacity 2 = DC device operating power * n 电器 , n 电器 It is the ratio of the DC appliance's allowed down-regulated operating power to the total operating power. If the DC appliance is not in operation or the user does not participate in the adjustment, the adjustable capacity 2 is zero.

[0086] 3) Adjustable capacity 3: First, determine whether the DC charging pile in the flexible load module of the solar-storage direct-flexible system is in operation. If the DC charging pile is in operation, determine whether the user chooses to participate in demand response. If the user chooses to participate, the adjustable capacity 3 = DC charging pile operating power * n 充电桩 , n 充电桩 It is the ratio of the operating power that the DC charging pile is allowed to adjust downward to the total operating power. If the DC charging pile is not in operation or the user does not participate in the adjustment, the adjustable capacity 3 is zero.

[0087] 4) Adjustable capacity 4: First, determine whether the DC air conditioner in the flexible load module of the solar-storage direct-flexible system is in operation. If the DC air conditioner is in operation, determine whether the user chooses to participate in demand response. If the user chooses to participate, the adjustable capacity 4 is equal to the operating power of the DC air conditioner reduced after the current air conditioner setting temperature is increased by 1-2°C or the air conditioner wind speed gear is reduced (related to the environmental conditions and calculated by the air conditioning control system). If the DC air conditioner is not turned on or the user does not participate in the adjustment, the adjustable capacity 4 is zero.

[0088] Step 2, determine whether the demand response control instruction of the power grid cloud master station is received. If the demand response control instruction is received, the operation of the equipment modules in the photovoltaic storage direct and flexible system is controlled according to the demand response mode strategy; if the demand response control instruction is not received, the equipment modules in the photovoltaic storage direct and flexible system are controlled to maintain the current operation mode. It is worth mentioning that before controlling the operation of the equipment modules in the photovoltaic storage direct and flexible system according to the demand response mode strategy, it can also be determined whether the user chooses to respond to the grid demand. When the user chooses to respond to the grid demand, the operation of the equipment modules in the photovoltaic storage direct and flexible system is controlled according to the demand response mode strategy. When the user does not choose to respond to the grid demand, the equipment modules in the photovoltaic storage direct and flexible system are controlled to maintain the current operation mode.

[0089] In this step, the operation of the equipment modules in the PV-storage direct-flexible system is controlled according to the demand response mode strategy, such as Figure 4 As shown, specifically including:

[0090] Determine whether the adjustable capacity 1 is greater than zero; if the adjustable capacity 1 is greater than zero, control the energy storage battery in the energy storage module of the solar-storage direct-flexible system to stop charging; if the adjustable capacity 1 is not greater than zero, proceed to the next step;

[0091] Determine whether the adjustable capacity 2 is greater than zero. If not, proceed directly to the next step. If greater than zero, further determine whether the responded capacity is less than the grid demand capacity. If the responded capacity is greater than the grid demand capacity, proceed directly to the last step. If the responded capacity is less than the grid demand capacity, control the operating power of the DC appliances in the flexible load module of the photovoltaic storage direct-flexible system to be reduced to (1-n 电器 ) times the current operating power and proceed to the next step;

[0092] Determine whether the adjustable capacity 3 is greater than zero. If not, proceed directly to the next step. If greater than zero, further determine whether the responded capacity is less than the grid demand capacity. If the responded capacity is greater than the grid demand capacity, proceed directly to the last step. If the responded capacity is less than the grid demand capacity, control the operating power of the DC charging pile in the flexible load module of the photovoltaic storage direct-flexible system to be reduced to (1-n 充电桩 ) times the current operating power and proceed to the next step;

[0093] Determine whether the adjustable capacity 4 is greater than zero. If not, proceed directly to the next step. If greater than zero, further determine whether the response capacity is less than the grid demand capacity. If the responded capacity is greater than the grid demand capacity, proceed directly to the last step. If the responded capacity is less than the grid demand capacity, control the DC air conditioner in the flexible load module of the photovoltaic storage direct-flexible system to increase the set temperature by 1°C or reduce the wind speed by one gear.

[0094] Finally, determine whether the time for the user to participate in the demand response has ended. If so, end the operation directly. If not, return to the first step and continue the operation.

[0095] It is not difficult to find that the present invention can calculate the adjustable capacity of the photovoltaic, storage, direct and flexible system in real time, and report it to the power grid cloud master station, receive control instructions from the power grid cloud master station, respond to power grid needs, ensure the green, flexible and efficient optimization operation of the photovoltaic, storage, direct and flexible system, realize efficient interaction between the photovoltaic, storage, direct and flexible system and the power grid, and fully tap the adjustable potential of the photovoltaic, storage, direct and flexible system.

[0096] The second embodiment of the present invention relates to a control device for a solar-storage direct-flexible system, comprising:

[0097] The calculation upload module is used to calculate the adjustable capacity of the PV-storage direct-flexible system and upload the adjustable capacity to the power grid cloud master station;

[0098] The judgment control module is used to determine whether a demand response control instruction is received from the power grid cloud master station. If a demand response control instruction is received, the operation of the equipment modules in the photovoltaic storage direct and flexible system is controlled according to the demand response mode strategy; if no demand response control instruction is received, the equipment modules in the photovoltaic storage direct and flexible system are controlled to maintain the current operation mode.

[0099] The calculation upload module includes:

[0100] The first calculation unit is used to calculate the adjustable energy storage capacity of the photovoltaic storage direct-flexible system;

[0101] The second calculation unit is used to calculate the adjustable capacity of the DC electrical appliances of the photovoltaic storage DC-flexible system;

[0102] The third calculation unit is used to calculate the adjustable capacity of the DC charging pile of the photovoltaic storage direct-flexible system;

[0103] The fourth calculation unit is used to calculate the adjustable capacity of the DC air conditioner of the photovoltaic storage direct-flexible system;

[0104] The summing calculation unit is used to sum the adjustable energy storage capacity of the photovoltaic storage direct-flexible system, the adjustable capacity of the DC appliance, the adjustable capacity of the DC charging pile, and the adjustable capacity of the DC air conditioner to obtain the adjustable capacity of the photovoltaic storage direct-flexible system.

[0105] The first computing unit comprises:

[0106] The energy storage battery judgment unit is used to judge whether the energy storage battery in the energy storage module of the photovoltaic storage direct-flexible system is in a charging state;

[0107] A measuring unit, used to measure the power generation of the photovoltaic power generation unit in the photovoltaic storage direct and flexible system when the energy storage battery is in a charging state;

[0108] A power generation judging unit, used to judge whether the power generation of the photovoltaic power generation unit is less than a set power generation value;

[0109] An SOC judgment unit is used to judge whether the SOC of the energy storage battery is greater than or equal to the SOC setting value when the power generation power of the photovoltaic power generation unit is less than the power generation power setting value;

[0110] The first determination unit is used to determine that the adjustable energy storage capacity is the charging power of the energy storage battery when the SOC of the energy storage battery is less than the SOC setting value; when the energy storage battery is not in a charging state, or the power generation power of the photovoltaic power generation unit is greater than or equal to the power generation power setting value, or the SOC of the energy storage battery is greater than or equal to the SOC setting value, determine that the adjustable energy storage capacity is zero.

[0111] The second computing unit comprises:

[0112] A DC appliance judgment unit is used to judge whether the DC appliance in the flexible load module of the solar-storage direct-flexible system is in operation;

[0113] The second determination unit is used to determine that the adjustable capacity of the DC appliance is the product of the operating power of the DC appliance and the proportion of the DC appliance's allowed downward operating power to the total operating power when the DC appliance is in operation; and to determine that the adjustable capacity of the DC appliance is zero when the DC appliance is not in operation.

[0114] The third computing unit comprises:

[0115] A DC charging pile judgment unit is used to judge whether the DC charging pile in the flexible load module of the photovoltaic storage direct-flexible system is in operation;

[0116] The third determination unit is used to determine that the adjustable capacity of the DC charging pile is the product of the operating power of the DC charging pile and the proportion of the operating power that the DC charging pile is allowed to be reduced to the total operating power when the DC charging pile is in an operating state; when the DC charging pile is not in an operating state, determine that the adjustable capacity of the DC charging pile is zero.

[0117] The fourth calculation unit comprises:

[0118] A DC air conditioning judgment unit is used to judge whether the DC air conditioning in the flexible load module of the solar-storage direct-flexible system is in operation;

[0119] The fourth determination unit is used to determine that the adjustable capacity of the DC air conditioner is the operating power reduced by the DC air conditioner after the set temperature of the DC air conditioner is increased by a preset value or the wind speed is reduced when the DC air conditioner is in operation; when the DC air conditioner is not in operation, determine that the adjustable capacity of the DC air conditioner is zero.

[0120] The judgment control module comprises:

[0121] The first judgment execution unit is used to judge whether the adjustable energy storage capacity is greater than zero, and when the adjustable energy storage capacity is greater than zero, control the energy storage battery in the energy storage module of the photovoltaic storage direct-flexible system to stop charging;

[0122] The second judgment execution unit is used to judge whether the adjustable capacity of the DC appliance is greater than zero and whether the responded capacity is less than the grid demand capacity, and when the adjustable capacity of the DC appliance is greater than zero and the responded capacity is less than the grid demand capacity, control the operation power of the DC appliance in the flexible load module of the solar-storage direct-flexible system to be reduced to (1-n 电器 ) times the current operating power, where n 电器 It indicates the proportion of the DC electrical appliance's allowed down-regulated operating power to the total operating power;

[0123] The third judgment execution unit is used to judge whether the adjustable capacity of the DC charging pile is greater than zero and whether the responded capacity is less than the grid demand capacity, and when the adjustable capacity of the DC charging pile is greater than zero and the responded capacity is less than the grid demand capacity, control the operation power of the DC charging pile in the flexible load module of the photovoltaic storage direct-flexible system to be reduced to (1-n 充电桩 ) times the current operating power, where n 充电桩 Indicates the proportion of the DC charging pile's allowed operating power to the total operating power;

[0124] The fourth judgment execution unit is used to judge whether the adjustable capacity of the DC air conditioner is greater than zero, and whether the responded capacity is less than the grid demand capacity. When the adjustable capacity of the DC air conditioner is greater than zero and the responded capacity is less than the grid demand capacity, the DC air conditioner in the flexible load module of the photovoltaic storage direct-flexible system is controlled to increase the set temperature by 1°C or reduce the wind speed by one level.

[0125] The third embodiment of the present invention relates to a solar-storage-direct-flexible system, comprising: a control device of the solar-storage-direct-flexible system of the second embodiment.

[0126] The fourth embodiment of the present invention relates to a computer-readable storage medium having a computer program stored thereon, and when the computer program is executed by a processor, the steps of the control method of the solar-storage direct-flexible system of the first embodiment are implemented.

[0127] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) that contain computer-usable program code.

[0128] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0129] These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer-readable memory produce a manufactured product including an instruction method, which is implemented in the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0130] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0131] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A control method for a solar-storage direct-flexible system, characterized in that: The following steps are involved: Calculate the adjustable capacity of the PV-storage-direct-flexible system, and upload the adjustable capacity to the power grid cloud master station; wherein the calculation of the adjustable capacity of the PV-storage-direct-flexible system specifically includes: Calculate the adjustable energy storage capacity of the solar-storage direct-flexible system; Calculate the adjustable capacity of DC appliances in the photovoltaic-storage-direct-flexible system; Calculate the adjustable capacity of the DC charging pile of the photovoltaic storage system; Calculate the adjustable capacity of the DC air conditioner in the solar-storage direct-flexible system; The adjustable capacity of the solar-storage-direct-flexible system is obtained by summing up the adjustable capacity of the energy storage, the adjustable capacity of the DC appliance, the adjustable capacity of the DC charging pile, and the adjustable capacity of the DC air conditioner; Determine whether a demand response control instruction from the power grid cloud master station is received. If a demand response control instruction is received, control the operation of the device modules in the photovoltaic storage direct and flexible system according to the demand response mode strategy; if no demand response control instruction is received, control the device modules in the photovoltaic storage direct and flexible system to maintain the current operation mode; wherein, controlling the operation of the device modules in the photovoltaic storage direct and flexible system according to the demand response mode strategy specifically includes: Determine whether the adjustable energy storage capacity is greater than zero; if the adjustable energy storage capacity is greater than zero, control the energy storage battery in the energy storage module of the solar storage direct and flexible system to stop charging; if the adjustable energy storage capacity is not greater than zero, proceed to the next step; Determine whether the adjustable capacity of the DC device is greater than zero, and whether the responded capacity is less than the grid demand capacity; if the adjustable capacity of the DC device is greater than zero, and the responded capacity is less than the grid demand capacity, then control the operating power of the DC device in the flexible load module of the solar-storage direct-flexible system to be reduced to 1-n 电器 times the current operating power, where n 电器 Indicates the proportion of the DC appliance's allowed down-regulated operating power to the total operating power; if the DC appliance's adjustable capacity is not greater than zero, proceed to the next step; Determine whether the adjustable capacity of the DC charging pile is greater than zero, and whether the responded capacity is less than the grid demand capacity; if the adjustable capacity of the DC charging pile is greater than zero, and the responded capacity is less than the grid demand capacity, then control the operating power of the DC charging pile in the flexible load module of the solar-storage direct-flexible system to be reduced to 1-n 充电桩 times the current operating power, where n 充电桩 Indicates the proportion of the DC charging pile's allowed operating power to the total operating power; if the adjustable capacity of the DC charging pile is not greater than zero, proceed to the next step; Determine whether the adjustable capacity of the DC air conditioner is greater than zero, and whether the responded capacity is less than the grid demand capacity; if the adjustable capacity of the DC air conditioner is greater than zero, and the responded capacity is less than the grid demand capacity, control the DC air conditioner in the flexible load module of the solar-storage direct-flexible system to increase the set temperature by 1°C or reduce the wind speed by one gear; if the adjustable capacity of the DC air conditioner is not greater than zero, proceed to the next step; Determine whether the time for the user to participate in the demand response has ended. If the time for the user to participate in the demand response has ended, end the operation directly. If the time for the user to participate in the demand response has not ended, return to the first step and continue the operation.

2. The control method of the solar-storage direct-flexible system according to claim 1, characterized in that: The calculation of the adjustable energy storage capacity of the photovoltaic storage direct-flexible system specifically includes: Determine whether the energy storage battery in the energy storage module of the solar-storage direct-flexible system is in a charging state; If the energy storage battery is in a charging state, the power generation of the photovoltaic power generation unit in the photovoltaic storage direct and flexible system is measured; Determine whether the power generation of the photovoltaic power generation unit is less than the set power generation value; If the power generation of the photovoltaic power generation unit is less than the power generation setting value, it is determined whether the SOC of the energy storage battery is greater than or equal to the SOC setting value; If the SOC of the energy storage battery is less than the SOC setting value, the adjustable capacity of the energy storage is the charging power of the energy storage battery; If the energy storage battery is not in a charging state, or the power generation power of the photovoltaic power generation unit is greater than or equal to the power generation power setting value, or the SOC of the energy storage battery is greater than or equal to the SOC setting value, the adjustable energy storage capacity is zero.

3. The control method of the solar-storage direct-flexible system according to claim 1, characterized in that: The calculation of the adjustable capacity of the DC appliance of the photovoltaic-storage-direct-flexible system specifically includes: Determine whether the DC appliances in the flexible load module of the solar-storage-direct-flexible system are in operation; If the DC appliance is in operation, the adjustable capacity of the DC appliance is the product of the operating power of the DC appliance and the proportion of the DC appliance's allowed reduced operating power to the total operating power; If the DC appliance is not in operation, the adjustable capacity of the DC appliance is zero.

4. The control method of the solar-storage direct-flexible system according to claim 1, characterized in that: The calculation of the adjustable capacity of the DC charging pile of the photovoltaic storage direct-flexible system specifically includes: Determine whether the DC charging pile in the flexible load module of the solar-storage DC-flexible system is in operation; If the DC charging pile is in operation, the adjustable capacity of the DC charging pile is the product of the operating power of the DC charging pile and the proportion of the operating power that the DC charging pile is allowed to adjust downward to the total operating power; If the DC charging pile is not in operation, the adjustable capacity of the DC charging pile is zero.

5. The control method of the solar-storage direct-flexible system according to claim 1, characterized in that: The calculation of the adjustable capacity of the DC air conditioner of the photovoltaic energy storage direct-flexible system specifically includes: Determine whether the DC air conditioner in the flexible load module of the solar-storage direct-flexible system is in operation; If the DC air conditioner is in operation, the adjustable capacity of the DC air conditioner is the operating power reduced by the DC air conditioner after the set temperature of the DC air conditioner is increased to a preset value or the wind speed level is reduced; If the DC air conditioner is not in operation, the adjustable capacity of the DC air conditioner is zero.

6. A control device for a solar-storage direct-flexible system, characterized in that: include: The calculation upload module is used to calculate the adjustable capacity of the PV-storage direct-flexible system and upload the adjustable capacity to the power grid cloud master station; The calculation upload module includes: The first calculation unit is used to calculate the adjustable energy storage capacity of the photovoltaic storage direct-flexible system; The second calculation unit is used to calculate the adjustable capacity of the DC electrical appliances of the photovoltaic storage DC-flexible system; The third calculation unit is used to calculate the adjustable capacity of the DC charging pile of the photovoltaic storage direct-flexible system; The fourth calculation unit is used to calculate the adjustable capacity of the DC air conditioner of the photovoltaic storage direct-flexible system; A summing calculation unit, used to sum the adjustable energy storage capacity of the photovoltaic-storage-direct-flexible system, the adjustable capacity of the DC appliance, the adjustable capacity of the DC charging pile, and the adjustable capacity of the DC air conditioner to obtain the adjustable capacity of the photovoltaic-storage-direct-flexible system; A judgment control module is used to judge whether a demand response control instruction is received from the power grid cloud master station. If a demand response control instruction is received, the operation of the device modules in the photovoltaic storage direct and flexible system is controlled according to the demand response mode strategy; if no demand response control instruction is received, the device modules in the photovoltaic storage direct and flexible system are controlled to maintain the current operation mode; the judgment control module includes: The first judgment execution unit is used to judge whether the adjustable energy storage capacity is greater than zero, and when the adjustable energy storage capacity is greater than zero, control the energy storage battery in the energy storage module of the photovoltaic storage direct-flexible system to stop charging, and when the adjustable energy storage capacity is not greater than zero, enter the second judgment execution unit; The second judgment execution unit is used to judge whether the adjustable capacity of the DC appliance is greater than zero and whether the responded capacity is less than the grid demand capacity, and when the adjustable capacity of the DC appliance is greater than zero and the responded capacity is less than the grid demand capacity, control the operation power of the DC appliance in the flexible load module of the solar-storage direct-flexible system to be reduced to 1-n 电器 times the current operating power. When the adjustable capacity of the DC appliance is not greater than zero, the third judgment execution unit is entered, where n 电器 It indicates the proportion of the DC electrical appliance's allowed down-regulated operating power to the total operating power; The third judgment execution unit is used to judge whether the adjustable capacity of the DC charging pile is greater than zero and whether the responded capacity is less than the grid demand capacity, and when the adjustable capacity of the DC charging pile is greater than zero and the responded capacity is less than the grid demand capacity, control the operation power of the DC charging pile in the flexible load module of the photovoltaic storage direct-flexible system to be reduced to 1-n 充电桩 times the current operating power. When the adjustable capacity of the DC charging pile is not greater than zero, the fourth judgment execution unit is entered, where n 充电桩 Indicates the proportion of the DC charging pile's allowed operating power to the total operating power; The fourth judgment execution unit is used to judge whether the adjustable capacity of the DC air conditioner is greater than zero, and whether the responded capacity is less than the grid demand capacity, and when the adjustable capacity of the DC air conditioner is greater than zero and the responded capacity is less than the grid demand capacity, control the DC air conditioner in the flexible load module of the solar storage direct-flexible system to increase the set temperature by 1°C or reduce the wind speed by one gear, and when the adjustable capacity of the DC air conditioner is not greater than zero, enter the end judgment unit; The end judgment unit is used to judge whether the time for the user to participate in the demand response has ended. If the time for the user to participate in the demand response has ended, the operation is ended directly. If the time for the user to participate in the demand response has not ended, it returns to the first judgment execution unit.

7. The control device of the solar-storage direct-flexible system according to claim 6, characterized in that: The first computing unit comprises: The energy storage battery judgment unit is used to judge whether the energy storage battery in the energy storage module of the photovoltaic storage direct-flexible system is in a charging state; A measuring unit, used to measure the power generation of the photovoltaic power generation unit in the photovoltaic storage direct and flexible system when the energy storage battery is in a charging state; A power generation judging unit, used to judge whether the power generation of the photovoltaic power generation unit is less than a set power generation value; An SOC judgment unit is used to judge whether the SOC of the energy storage battery is greater than or equal to the SOC setting value when the power generation power of the photovoltaic power generation unit is less than the power generation power setting value; The first determination unit is used to determine that the adjustable energy storage capacity is the charging power of the energy storage battery when the SOC of the energy storage battery is less than the SOC setting value; when the energy storage battery is not in a charging state, or the power generation power of the photovoltaic power generation unit is greater than or equal to the power generation power setting value, or the SOC of the energy storage battery is greater than or equal to the SOC setting value, determine that the adjustable energy storage capacity is zero.

8. The control device of the solar-storage direct-flexible system according to claim 6, characterized in that: The second computing unit comprises: A DC appliance judgment unit is used to judge whether the DC appliance in the flexible load module of the solar-storage direct-flexible system is in operation; The second determination unit is used to determine that the adjustable capacity of the DC appliance is the product of the operating power of the DC appliance and the proportion of the DC appliance's allowed downward operating power to the total operating power when the DC appliance is in operation; and to determine that the adjustable capacity of the DC appliance is zero when the DC appliance is not in operation.

9. The control device of the solar-storage direct-flexible system according to claim 6, characterized in that: The third computing unit comprises: A DC charging pile judgment unit is used to judge whether the DC charging pile in the flexible load module of the photovoltaic storage direct-flexible system is in operation; The third determination unit is used to determine that the adjustable capacity of the DC charging pile is the product of the operating power of the DC charging pile and the proportion of the operating power that the DC charging pile is allowed to be reduced to the total operating power when the DC charging pile is in an operating state; when the DC charging pile is not in an operating state, determine that the adjustable capacity of the DC charging pile is zero.

10. The control device of the solar-storage direct-flexible system according to claim 6, characterized in that: The fourth calculation unit comprises: A DC air conditioning judgment unit is used to judge whether the DC air conditioning in the flexible load module of the solar-storage direct-flexible system is in operation; The fourth determination unit is used to determine that the adjustable capacity of the DC air conditioner is the operating power reduced by the DC air conditioner after the set temperature of the DC air conditioner is increased by a preset value or the wind speed is reduced when the DC air conditioner is in operation; when the DC air conditioner is not in operation, determine that the adjustable capacity of the DC air conditioner is zero.

11. A solar storage direct-flexible system, characterized in that: include: A control device for a solar-storage direct-flexible system as described in any one of claims 6 to 10.

12. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the control method of the solar-storage direct-flexible system as described in any one of claims 1 to 5 are implemented.

Images