Power scheduling method, scheduling device, readable storage medium and distribution box

Abstract

The invention provides a power scheduling method, a scheduling device, a readable storage medium and a distribution box, and the power scheduling method comprises the steps: obtaining a first power value which is a power value at a power grid port; entering an anti-reflux mode based on the fact that the first power value is greater than the sum value of the set electricity selling power and the first power limit value; in the anti-countercurrent mode, reducing the target inversion power of the energy storage converter on the basis that the sum value of the set electricity selling power and the second power limit value is smaller than or equal to the first power value; acquiring an updated first power value; based on the fact that the updated first power value is smaller than the sum value of the set electricity selling power and the second power limit value, the anti-backflow mode is quitted; wherein the first power limit value is greater than the second power limit value. According to the power scheduling method provided by the invention, the time required by the inversion power of the energy storage converter from oscillation to stabilization can be shortened, and the target inversion power can be quickly controlled in an anti-countercurrent mode.

Description

Technical Field

[0001] The present invention relates to the field of energy storage technology, and in particular to a power dispatching method, a dispatching device, a readable storage medium and a distribution box. Background Art

[0002] When controlling the energy storage inverter, it is necessary to obtain the inverter power reported by the energy storage inverter and the power collected at the grid port. However, the period for the energy storage inverter to report the inverter power is different from the period for collecting the power at the grid port. Therefore, the inverter power reported by the energy storage inverter and the power collected at the grid port are not synchronized, and there is a time difference between the two.

[0003] Since the inverter power reported by the energy storage inverter and the power collected at the grid port are not synchronized, the target inverter power calculated based on the inverter power reported by the energy storage inverter and the power collected at the grid port has a large error, causing the inverter power of the energy storage inverter to oscillate, which takes a long time to stabilize. Summary of the invention

[0004] The present invention aims to at least solve the technical problem existing in the prior art or related art that the target inverter power calculated using the energy conservation principle has a large error, causing the inverter power of the energy storage converter to oscillate and take a long time to stabilize.

[0005] To this end, a first aspect of the present invention is to provide a power scheduling method.

[0006] A second aspect of the present invention is to provide a power scheduling device.

[0007] A third aspect of the present invention is to provide another power scheduling device.

[0008] A fourth aspect of the present invention provides a readable storage medium.

[0009] A fifth aspect of the present invention is to provide a distribution box.

[0010] In view of this, according to a first aspect of the present invention, the present invention provides a power scheduling method, including: obtaining a first power value, the first power value being the power value at the grid port; entering an anti-backflow mode based on the first power value being greater than the sum of a set power selling power and a first power limit; in the anti-backflow mode, reducing the target inverter power of the energy storage converter based on the sum of the set power selling power and the second power limit being less than or equal to the first power value; obtaining an updated first power value; exiting the anti-backflow mode based on the updated first power value being less than the sum of the set power selling power and the second power limit; wherein the first power limit is greater than the second power limit.

[0011] The present invention proposes a power scheduling method. By running the above power scheduling method, when the energy storage converter operates in the anti-backflow mode, if the power value at the grid port, the set power selling power and the first power limit satisfy the corresponding relationship, the anti-backflow mode will be entered. In the anti-backflow mode, the power value at the grid port will be compared with the set power selling power and the second power limit, and then when the corresponding relationship is satisfied, the target inverter power of the energy storage converter will be reduced. In this process, the adjustment of the target inverter power will only be affected by the above parameters. Therefore, the degree to which the target inverter power is affected by the inverter power reported by the energy storage converter and the power collected at the grid port can be reduced.

[0012] In this process, compared with the calculation method of directly calculating the target inverter power by using the inverter power reported by the energy storage inverter and the power collected at the grid port, the power scheduling method proposed in the present invention can prevent the target inverter power from changing suddenly when the load power changes suddenly, thereby reducing the probability of a large error in the target inverter power, shortening the time required for the inverter power of the energy storage inverter to stabilize from oscillation, and enabling the energy storage inverter to be quickly controlled in the anti-reverse current mode.

[0013] In some technical solutions, optionally, the target inverter power is the inverter power that is desired to be achieved during the operation of the energy storage converter.

[0014] In some technical solutions, optionally, the grid port can be understood to be a mains power port. Specifically, power can be supplied to the load through the mains power port, and power can also be supplied to the outside through the mains power port, that is, electricity can be sold to the outside.

[0015] Among them, in the power supply and distribution system, the distribution transformer generally supplies power to the load, and the current flows from the grid side to the load, which is called forward current. In the technical solution of this application, the electric energy generated by photovoltaic power generation can be inverted by the energy storage converter and then supplied to the grid port. When the photovoltaic power generation power is greater than the local load power and the load cannot be fully absorbed, the remaining electric energy is fed into the grid, that is, it is connected to the mains through the grid port. Since the current direction is opposite to the conventional one, it is called reverse flow.

[0016] Normal photovoltaic power generation converts the direct current of photovoltaic modules into alternating current and feeds it into the power grid. However, in the anti-reverse flow mode, the electricity generated by photovoltaic modules is only used for local loads, preventing the electricity generated by the photovoltaic system from being fed into the power grid.

[0017] Among them, the first power limit can be understood as the set power limit. By setting the first power limit, in order to add the first power limit when comparing the first power value with the set selling power, it is possible to avoid the energy storage converter from entering the anti-reverse current mode too early, reduce the frequency of the target inverter power oscillation, and achieve the power at the grid port being controlled within a stable range for a short time when there is a sudden change in the load power.

[0018] In some technical solutions, optionally, the value of the electricity sold can be set to zero or other values ​​greater than zero, which will not be elaborated here.

[0019] In this process, the second power limit is smaller than the first power limit, so that the conditions for entering and exiting the anti-reverse flow mode are different, and the second power limit is smaller than the first power limit, so that a fluctuation range is set for entering and exiting the anti-reverse flow mode. In this process, the energy storage inverter can frequently enter and exit the anti-reverse flow mode, thereby reducing the frequency of switching the operating mode of the energy storage inverter, thereby reducing the fluctuation frequency of the target inverter power.

[0020] In addition, the power scheduling method proposed in this application also has the following additional technical features.

[0021] In some technical solutions, optionally, reducing the target inverter power of the energy storage inverter includes: obtaining a first time duration and a second power value; controlling the target inverter power of the energy storage inverter to reduce the second power value at every first time duration; wherein the reduced target inverter power is greater than or equal to zero.

[0022] In this technical solution, the target inverter power of the energy storage converter adopts a step-by-step reduction strategy. During this process, while reducing the target inverter power, it is also possible to avoid the target inverter power being reduced too much in an instant, causing overshoot of the energy storage converter.

[0023] Specifically, when the target inverter power is reduced too much and overshoot occurs, the energy storage converter will frequently switch between the power climbing mode and the anti-reverse flow mode, prolonging the time it takes for the target inverter power to change from a sudden load change to a stable state.

[0024] In addition, by reasonably setting the second power value, the frequent switching between the power climbing mode and the anti-backflow mode can be reduced. If the target inverter power is reduced to a relatively low level in the anti-backflow mode, then when exiting the anti-backflow mode, that is, in the power climbing mode, it will take a longer time to increase the target inverter power until it stabilizes, at which time it will remain in the power climbing mode.

[0025] Specifically, under the joint action of the photovoltaic components and the energy storage components, the power value at the grid port is controlled at zero. At this time, the target inverter power will increase to the maximum inverter power.

[0026] In addition, the power generation power of the photovoltaic module not only enables the grid port to sell electricity at the maximum power, but also enables the energy storage module to be charged at the maximum charging power. At this time, the target inverter power will not increase and will remain consistent with the actual inverter power of the energy storage inverter.

[0027] By setting the first time length so as to utilize the first time length to limit the reduction frequency of the target inverter power, and setting the second power value so as to utilize the second power value to limit the amplitude of each reduction of the target inverter power, in this process, a step-by-step reduction of the target inverter power can be achieved, thereby realizing rapid control of the reverse current power.

[0028] In some technical solutions, the value of the second power value can be determined according to actual usage needs, which will not be elaborated here.

[0029] In the above technical solution, the target inverter power after reduction is limited to be greater than or equal to zero, so as to avoid the target inverter power from being reduced below zero, so that the target inverter power value is within an unfeasible range, thereby reducing the impact of the target inverter power on the operation of the energy storage inverter, thereby improving the stability of the operation of the energy storage inverter.

[0030] In some technical solutions, optionally, the power scheduling method also includes: obtaining the charging power of the energy storage component; based on the charging power being the maximum charging power and the first power value being equal to the maximum selling power, keeping the target inverter power of the energy storage converter unchanged.

[0031] In this technical solution, the energy storage component may be a battery pack, or may include a capacitor or other components capable of storing electrical energy.

[0032] In this technical solution, if the charging power of the energy storage component is the maximum charging power and the first power value is the maximum selling power, it is considered that the inverter power of the energy storage inverter is sufficient. By keeping the target inverter power unchanged, the energy storage inverter can continue to output power to the outside, thereby achieving full utilization of electric energy.

[0033] In some technical solutions, the maximum charging power is a pre-set power value, which can be set according to the hardware parameters of the energy storage component or can be set by the user. Its specific value will not be repeated here.

[0034] In some technical solutions, the maximum electricity selling power is a pre-set power value, which can be set according to actual usage needs or by the user. Its specific value will not be repeated here.

[0035] In some technical solutions, optionally, the power scheduling method also includes: increasing the target inverter power of the energy storage inverter based on the charging power being less than the maximum charging power and / or the first power value being less than the maximum power selling power, and the first power value being less than or equal to the sum of the set power selling power and the first power limit.

[0036] In this technical solution, if at least one of the charging power and the first power value is less than the corresponding comparison value, that is, at least one of the charging power is less than the maximum charging power and the first power value is less than the maximum selling power, it is considered that the inverter power of the current energy storage inverter is insufficient. At this time, it is necessary to further determine whether it is necessary to enter the anti-reverse flow mode or to increase the target inverter power.

[0037] At this time, if the first power value is less than or equal to the sum of the set selling power and the first power limit, it is considered that the current inverter power of the energy storage converter is insufficient and the target inverter power needs to be increased. Therefore, the target inverter power of the energy storage converter is increased.

[0038] In this process, when the inverter power is insufficient, the inverter power of the energy storage converter can be increased by increasing the target inverter power, thereby meeting the inverter power demand of the energy storage converter.

[0039] In some technical schemes, optionally, increasing the target inverter power of the energy storage inverter includes: obtaining a second time duration and a third power value; controlling the target inverter power of the energy storage inverter to increase the third power value every second time duration; wherein the increased target inverter power of the energy storage inverter is less than or equal to the maximum inverter power value.

[0040] In this technical solution, the target inverter power of the energy storage converter adopts a step-by-step increase strategy. During this process, while increasing the target inverter power, it is also possible to avoid the target inverter power from increasing too much instantly, causing overshoot of the energy storage converter.

[0041] Specifically, when the target inverter power increases too much and overshoot occurs, the energy storage converter will frequently switch between the power climbing mode and the anti-reverse flow mode, prolonging the time it takes for the target inverter power to change from a sudden load change to a stable state.

[0042] By setting the second time length so as to utilize the second time length to limit the frequency of increase of the target inverter power, and setting the third power value so as to utilize the third power value to limit the amplitude of each increase of the target inverter power, in this process, a step-by-step increase of the target inverter power can be achieved, thereby realizing rapid control of the reverse current power.

[0043] In some technical solutions, the value of the third power value can be determined according to actual usage needs, which will not be elaborated here.

[0044] In this technical solution, the maximum inverter power value is limited to prevent the energy storage converter from operating in excess of its set parameters, thereby affecting the reliability of the energy storage converter operation.

[0045] In some technical solutions, optionally, the first power limit value is between 5% and 8% of the rated power of the energy storage converter; and / or the second power limit value is between 1% and 5% of the rated power of the energy storage converter.

[0046] According to a second aspect of the present invention, the present invention provides a power dispatching device, comprising: an acquisition unit, used to acquire a first power value, the first power value being the power value at the grid port; a first processing unit, used to enter an anti-backflow mode based on the first power value being greater than the sum of a set power selling power and a first power limit; in the anti-backflow mode, based on the sum of the set power selling power and the second power limit being less than or equal to the first power value, reducing the target inverter power of the energy storage converter; the acquisition unit, further used to acquire an updated first power value; a second processing unit, used to exit the anti-backflow mode based on the updated first power value being less than the sum of the set power selling power and the second power limit; wherein the first power limit is greater than the second power limit.

[0047] The present invention proposes a power dispatching device. When the energy storage converter operates in the anti-backflow mode, if the power value at the grid port, the set power selling power and the first power limit satisfy the corresponding relationship, the anti-backflow mode will be entered. In the anti-backflow mode, the power value at the grid port will be compared with the set power selling power and the second power limit, and then the target inverter power of the energy storage converter will be reduced when the corresponding relationship is satisfied. In this process, the adjustment of the target inverter power will only be affected by the above parameters. Therefore, the degree to which the target inverter power is affected by the inverter power reported by the energy storage converter and the power collected at the grid port can be reduced.

[0048] In this process, compared with the calculation method of directly calculating the target inverter power by using the inverter power reported by the energy storage inverter and the power collected at the grid port, the power scheduling method proposed in the present invention can prevent the target inverter power from changing suddenly when the load power changes suddenly, thereby reducing the probability of a large error in the target inverter power, shortening the time required for the inverter power of the energy storage inverter to stabilize from oscillation, and enabling the energy storage inverter to be quickly controlled in the anti-reverse current mode.

[0049] In some technical solutions, optionally, the target inverter power is the inverter power that is desired to be achieved during the operation of the energy storage converter.

[0050] In some technical solutions, optionally, the grid port can be understood to be a mains power port. Specifically, power can be supplied to the load through the mains power port, and power can also be supplied to the outside through the mains power port, that is, electricity can be sold to the outside.

[0051] Among them, in the power supply and distribution system, the distribution transformer generally supplies power to the load, and the current flows from the grid side to the load, which is called forward current. In the technical solution of this application, the electric energy generated by photovoltaic power generation can be inverted by the energy storage converter and then supplied to the grid port. When the photovoltaic power generation power is greater than the local load power and the load cannot be fully absorbed, the remaining electric energy is fed into the grid, that is, it is connected to the mains through the grid port. Since the current direction is opposite to the conventional one, it is called reverse flow.

[0052] Normal photovoltaic power generation converts the direct current of photovoltaic modules into alternating current and feeds it into the power grid. However, in the anti-reverse flow mode, the electricity generated by photovoltaic modules is only used for local loads, preventing the electricity generated by the photovoltaic system from being fed into the power grid.

[0053] Among them, the first power limit can be understood as the set power limit. By setting the first power limit, in order to add the first power limit when comparing the first power value with the set selling power, it is possible to avoid the energy storage converter from entering the anti-reverse current mode too early, reduce the frequency of the target inverter power oscillation, and achieve the power at the grid port being controlled within a stable range for a short time when there is a sudden change in the load power.

[0054] In some technical solutions, optionally, the value of the electricity sold can be set to zero or other values ​​greater than zero, which will not be elaborated here.

[0055] In this process, the second power limit is smaller than the first power limit, so that the conditions for entering and exiting the anti-reverse flow mode are different, and the second power limit is smaller than the first power limit, so that a fluctuation range is set for entering and exiting the anti-reverse flow mode. In this process, the energy storage inverter can frequently enter and exit the anti-reverse flow mode, thereby reducing the frequency of switching the operating mode of the energy storage inverter, thereby reducing the fluctuation frequency of the target inverter power.

[0056] In addition, the power dispatching device proposed in this application also has the following additional technical features.

[0057] In some technical solutions, optionally, the first processing unit is specifically used to: obtain a first duration and a second power value; control the target inverter power of the energy storage converter to reduce the second power value at every first duration; wherein the reduced target inverter power is greater than or equal to zero.

[0058] In this technical solution, the target inverter power of the energy storage converter adopts a step-by-step reduction strategy. During this process, while reducing the target inverter power, it is also possible to avoid the target inverter power being reduced too much in an instant, causing overshoot of the energy storage converter.

[0059] Specifically, when the target inverter power is reduced too much and overshoot occurs, the energy storage converter will frequently switch between the power climbing mode and the anti-reverse flow mode, prolonging the time it takes for the target inverter power to change from a sudden load change to a stable state.

[0060] In addition, by reasonably setting the second power value, the frequent switching between the power climbing mode and the anti-backflow mode can be reduced. If the target inverter power is reduced to a relatively low level in the anti-backflow mode, then when exiting the anti-backflow mode, that is, in the power climbing mode, it will take a longer time to increase the target inverter power until it stabilizes, at which time it will remain in the power climbing mode.

[0061] Specifically, under the joint action of the photovoltaic components and the energy storage components, the power value at the grid port is controlled at zero. At this time, the target inverter power will increase to the maximum inverter power.

[0062] In addition, the power generation power of the photovoltaic module not only enables the grid port to sell electricity at the maximum power, but also enables the energy storage module to be charged at the maximum charging power. At this time, the target inverter power will not increase and will remain consistent with the actual inverter power of the energy storage inverter.

[0063] By setting the first time length so as to utilize the first time length to limit the reduction frequency of the target inverter power, and setting the second power value so as to utilize the second power value to limit the amplitude of each reduction of the target inverter power, in this process, a step-by-step reduction of the target inverter power can be achieved, thereby realizing rapid control of the reverse current power.

[0064] In some technical solutions, the value of the second power value can be determined according to actual usage needs, which will not be elaborated here.

[0065] In the above technical solution, the target inverter power of the energy storage converter after reduction is limited to be greater than or equal to zero, so as to avoid the target inverter power from being reduced below zero, so that the target inverter power value is within an unfeasible range, thereby reducing the impact of the target inverter power on the operation of the energy storage converter, thereby improving the stability of the operation of the energy storage converter.

[0066] In some technical solutions, optionally, the first processing unit is also used to: obtain the charging power of the energy storage component; based on the charging power being the maximum charging power and the first power value being equal to the maximum selling power, keep the target inverter power of the energy storage inverter unchanged.

[0067] In this technical solution, the energy storage component may be a battery pack, or may include a capacitor or other components capable of storing electrical energy.

[0068] In this technical solution, if the charging power of the energy storage component is the maximum charging power and the first power value is the maximum selling power, it is considered that the inverter power of the energy storage inverter is sufficient. By keeping the target inverter power unchanged, the energy storage inverter can continue to output power to the outside, thereby achieving full utilization of electric energy.

[0069] In some technical solutions, the maximum charging power is a pre-set power value, which can be set according to the hardware parameters of the energy storage component or can be set by the user. Its specific value will not be repeated here.

[0070] In some technical solutions, the maximum electricity selling power is a pre-set power value, which can be set according to actual usage needs or by the user. Its specific value will not be repeated here.

[0071] In some technical solutions, optionally, the first processing unit is also used to: increase the target inverter power of the energy storage inverter based on the charging power being less than the maximum charging power and / or the first power value being less than the maximum power selling power, and the first power value being less than or equal to the sum of the set power selling power and the first power limit.

[0072] In this technical solution, if at least one of the charging power and the first power value is less than the corresponding comparison value, that is, at least one of the charging power is less than the maximum charging power and the first power value is less than the maximum selling power, it is considered that the inverter power of the current energy storage inverter is insufficient. At this time, it is necessary to further determine whether it is necessary to enter the anti-reverse flow mode or to increase the target inverter power.

[0073] At this time, if the first power value is less than or equal to the sum of the set selling power and the first power limit, it is considered that the current inverter power of the energy storage converter is insufficient and the target inverter power needs to be increased. Therefore, the target inverter power of the energy storage converter is increased.

[0074] In this process, when the inverter power is insufficient, the inverter power of the energy storage converter can be increased by increasing the target inverter power, thereby meeting the inverter power demand of the energy storage converter.

[0075] In some technical schemes, optionally, the first processing unit is specifically used to: obtain the second time duration and the third power value; control the target inverter power of the energy storage inverter to increase the third power value every second time duration; wherein the increased target inverter power of the energy storage inverter is less than or equal to the maximum inverter power value.

[0076] In this technical solution, the target inverter power of the energy storage converter adopts a step-by-step increase strategy. During this process, while increasing the target inverter power, it is also possible to avoid the target inverter power from increasing too much instantly, causing overshoot of the energy storage converter.

[0077] Specifically, when the target inverter power increases too much and overshoot occurs, the energy storage converter will frequently switch between the power climbing mode and the anti-reverse flow mode, prolonging the time it takes for the target inverter power to change from a sudden load change to a stable state.

[0078] By setting the second time length so as to utilize the second time length to limit the frequency of increase of the target inverter power, and setting the third power value so as to utilize the third power value to limit the amplitude of each increase of the target inverter power, in this process, a step-by-step increase of the target inverter power can be achieved, thereby realizing rapid control of the reverse current power.

[0079] In some technical solutions, the value of the third power value can be determined according to actual usage needs, which will not be elaborated here.

[0080] In this technical solution, the maximum inverter power value is limited to prevent the energy storage converter from operating in excess of its set parameters, thereby affecting the reliability of the energy storage converter operation.

[0081] In some technical solutions, optionally, the first power limit value is between 5% and 8% of the rated power of the energy storage converter; and / or the second power limit value is between 1% and 5% of the rated power of the energy storage converter.

[0082] According to the third aspect of the present invention, the present invention provides a power scheduling device, including a processor and a memory, the memory storing programs or instructions that can be run on the processor, and the program or instructions, when executed by the processor, implements the steps of any of the power scheduling methods described above.

[0083] According to a fourth aspect of the present invention, the present invention provides a readable storage medium, on which a program or instruction is stored, and when the program or instruction is executed by a processor, the steps of the power scheduling method as described above are implemented.

[0084] According to a fifth aspect of the present invention, the present invention provides a distribution box, comprising: any power dispatching device as described above; and / or a readable storage medium as described above.

[0085] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0086] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0087] Figure 1 One of the flow diagrams of a power scheduling method in an embodiment of the present invention is shown;

[0088] Figure 2 A schematic diagram showing the relationship between voltage, current and power in an embodiment of the present invention is shown:

[0089] Figure 3 The second flowchart of a power scheduling method in an embodiment of the present invention is shown:

[0090] Figure 4 A schematic block diagram of a power dispatching device in an embodiment of the present invention is shown;

[0091] Figure 5 A schematic block diagram of another power scheduling device in an embodiment of the present invention is shown. DETAILED DESCRIPTION

[0092] In order to more clearly understand the above aspects, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0093] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0094] In one embodiment of the present application, Figure 1 As shown, a power scheduling method is provided, comprising:

[0095] Step 102, obtaining a first power value, where the first power value is a power value at a power grid port;

[0096] Step 104, based on the first power value being greater than the sum of the set power selling power and the first power limit, entering the anti-backflow mode; in the anti-backflow mode, based on the sum of the set power selling power and the second power limit being less than or equal to the first power value, reducing the target inverter power of the energy storage converter; obtaining the updated first power value; based on the updated first power value being less than the sum of the set power selling power and the second power limit, exiting the anti-backflow mode; wherein the first power limit is greater than the second power limit.

[0097] The present invention proposes a power scheduling method. By running the above power scheduling method, when the energy storage converter operates in the anti-backflow mode, if the power value at the grid port, the set power selling power and the first power limit satisfy the corresponding relationship, the anti-backflow mode will be entered. In the anti-backflow mode, the power value at the grid port will be compared with the set power selling power and the second power limit, and then when the corresponding relationship is satisfied, the target inverter power of the energy storage converter will be reduced. In this process, the adjustment of the target inverter power will only be affected by the above parameters. Therefore, the degree to which the target inverter power is affected by the inverter power reported by the energy storage converter and the power collected at the grid port can be reduced.

[0098] In this process, compared with the calculation method of directly calculating the target inverter power by using the inverter power reported by the energy storage inverter and the power collected at the grid port, the power scheduling method proposed in the present invention can prevent the target inverter power from changing suddenly when the load power changes suddenly, thereby reducing the probability of a large error in the target inverter power, shortening the time required for the inverter power of the energy storage inverter to stabilize from oscillation, and enabling the energy storage inverter to be quickly controlled in the anti-reverse current mode.

[0099] In some technical solutions, optionally, the target inverter power is the inverter power that is desired to be achieved during the operation of the energy storage converter.

[0100] In some embodiments, optionally, the grid port can be understood to be a mains power port. Specifically, power can be supplied to the load through the mains power port, and power can also be supplied externally through the mains power port, that is, electricity can be sold externally.

[0101] Among them, in the power supply and distribution system, the distribution transformer generally supplies power to the load, and the current flows from the grid side to the load, which is called forward current. In the embodiment of the present application, the electric energy generated by photovoltaic power generation can be inverted by the energy storage converter and then supplied to the grid port. When the photovoltaic power generation power is greater than the local load power and the load cannot be fully absorbed, the remaining electric energy is fed into the grid, that is, it is connected to the mains through the grid port. Since the current direction is opposite to the conventional one, it is called reverse flow.

[0102] Normal photovoltaic power generation converts the direct current of photovoltaic modules into alternating current and feeds it into the power grid. However, in the anti-reverse flow mode, the electricity generated by photovoltaic modules is only used for local loads, preventing the electricity generated by the photovoltaic system from being fed into the power grid.

[0103] Among them, the first power limit can be understood as the set power limit. By setting the first power limit, in order to add the first power limit when comparing the first power value with the set selling power, it is possible to avoid the energy storage converter from entering the anti-reverse current mode too early, reduce the frequency of the target inverter power oscillation, and achieve the power at the grid port being controlled within a stable range for a short time when there is a sudden change in the load power.

[0104] In some embodiments, the power sold may be set to a value of zero or other value greater than zero, which will not be described in detail here.

[0105] In this process, the second power limit is smaller than the first power limit, so that the conditions for entering and exiting the anti-reverse flow mode are different, and the second power limit is smaller than the first power limit, so that a fluctuation range is set for entering and exiting the anti-reverse flow mode. In this process, the energy storage inverter can frequently enter and exit the anti-reverse flow mode, thereby reducing the frequency of switching the operating mode of the energy storage inverter, thereby reducing the fluctuation frequency of the target inverter power.

[0106] In some embodiments, optionally, reducing the target inverter power of the energy storage inverter specifically includes: acquiring a first time duration and a second power value; controlling the target inverter power of the energy storage inverter to reduce the second power value at every first time duration; wherein the reduced target inverter power is greater than or equal to zero.

[0107] In this embodiment, the target inverter power of the energy storage converter adopts a step-by-step reduction strategy. During this process, while reducing the target inverter power, it is also possible to avoid the target inverter power being reduced too much in an instant, causing overshoot of the energy storage converter.

[0108] Specifically, when the target inverter power is reduced too much and overshoot occurs, the energy storage converter will frequently switch between the power climbing mode and the anti-reverse flow mode, prolonging the time it takes for the target inverter power to change from a sudden load change to a stable state.

[0109] In addition, by reasonably setting the second power value, the frequent switching between the power climbing mode and the anti-backflow mode can be reduced. If the target inverter power is reduced to a relatively low level in the anti-backflow mode, then when exiting the anti-backflow mode, that is, in the power climbing mode, it will take a longer time to increase the target inverter power until it stabilizes, at which time it will remain in the power climbing mode.

[0110] Specifically, under the joint action of the photovoltaic components and the energy storage components, the power value at the grid port is controlled at zero. At this time, the target inverter power will increase to the maximum inverter power.

[0111] In addition, the power generation power of the photovoltaic module not only enables the grid port to sell electricity at the maximum power, but also enables the energy storage module to be charged at the maximum charging power. At this time, the target inverter power will not increase and will remain consistent with the actual inverter power of the energy storage inverter.

[0112] By setting the first time length so as to utilize the first time length to limit the reduction frequency of the target inverter power, and setting the second power value so as to utilize the second power value to limit the amplitude of each reduction of the target inverter power, in this process, a step-by-step reduction of the target inverter power can be achieved, thereby realizing rapid control of the reverse current power.

[0113] In some embodiments, the value of the second power value can be determined according to actual usage requirements, which will not be elaborated here.

[0114] In the above embodiment, the target inverter power of the energy storage converter after reduction is limited to be greater than or equal to zero, so as to avoid the target inverter power from being reduced below zero, so that the target inverter power value is within an unfeasible range, thereby reducing the impact of the target inverter power on the operation of the energy storage converter, thereby improving the stability of the operation of the energy storage converter.

[0115] In some embodiments, optionally, the power scheduling method also includes: obtaining the charging power of the energy storage component; based on the charging power being the maximum charging power and the first power value being equal to the maximum selling power, maintaining the target inverter power of the energy storage converter unchanged.

[0116] In this embodiment, the energy storage component may be a battery pack, or may include a capacitor or other components capable of storing electrical energy.

[0117] In this embodiment, if the charging power of the energy storage component is the maximum charging power and the first power value is the maximum selling power, it is considered that the inverter power of the energy storage inverter is sufficient. By keeping the target inverter power unchanged, the energy storage inverter can continue to output power to the outside, thereby achieving full utilization of electric energy.

[0118] In some embodiments, the maximum charging power is a pre-set power value, which can be set according to the hardware parameters of the energy storage component or can be set by the user. Its specific value will not be described in detail here.

[0119] In some embodiments, the maximum electricity selling power is a pre-set power value, which can be set according to actual usage needs or by the user. Its specific value will not be repeated here.

[0120] In some embodiments, optionally, the power scheduling method also includes: increasing the target inverter power of the energy storage inverter based on the charging power being less than the maximum charging power and / or the first power value being less than the maximum power selling power, and the first power value being less than or equal to the sum of the set power selling power and the first power limit.

[0121] In this embodiment, if at least one of the charging power and the first power value is less than the corresponding comparison value, that is, at least one of the charging power is less than the maximum charging power and the first power value is less than the maximum selling power, then it is considered that the current energy storage inverter has insufficient inverter power. At this time, it is necessary to further determine whether it is necessary to enter the anti-reverse flow mode or to increase the target inverter power.

[0122] At this time, if the first power value is less than or equal to the sum of the set selling power and the first power limit, it is considered that the current inverter power of the energy storage converter is insufficient and the target inverter power needs to be increased. Therefore, the target inverter power of the energy storage converter is increased.

[0123] In this process, when the inverter power is insufficient, the inverter power of the energy storage converter can be increased by increasing the target inverter power, thereby meeting the inverter power demand of the energy storage converter.

[0124] In some embodiments, optionally, increasing the target inverter power of the energy storage inverter specifically includes: obtaining a second time duration and a third power value; controlling the target inverter power of the energy storage inverter to increase the third power value at every second time duration; wherein the increased target inverter power of the energy storage inverter is less than or equal to the maximum inverter power value.

[0125] In this embodiment, the target inverter power of the energy storage converter adopts a step-by-step increase strategy. During this process, while increasing the target inverter power, it is also possible to avoid the target inverter power increasing too much instantly, causing overshoot of the energy storage converter.

[0126] Specifically, when the target inverter power increases too much and overshoot occurs, the energy storage converter will frequently switch between the power climbing mode and the anti-reverse flow mode, prolonging the time it takes for the target inverter power to change from a sudden load change to a stable state.

[0127] By setting the second time duration so as to utilize the second time duration to limit the reduction frequency of the target inverter power, and setting the third power value so as to utilize the third power value to limit the amplitude of each increase of the target inverter power, in this process, a step-by-step increase in the target inverter power can be achieved, thereby realizing rapid control of the reverse current power.

[0128] In some embodiments, the value of the third power value can be determined according to actual usage requirements, which will not be elaborated here.

[0129] In this embodiment, the maximum inverter power value is limited to prevent the energy storage converter from operating in excess of its set parameters, thereby affecting the reliability of the energy storage converter operation.

[0130] At the same time, by increasing the target inverter power, the target inverter power can reach the maximum inverter power value, so that the photovoltaic components can be fully utilized, thereby maximizing the use of green electricity and reducing the waste of green electricity.

[0131] like Figure 2 As shown, when the voltage is Vmp, the target inverter power reaches the maximum inverter power value, where Vmp is a voltage value.

[0132] In some embodiments, optionally, the first power limit value is between 5% and 8% of the rated power of the energy storage converter; and / or the second power limit value is between 1% and 5% of the rated power of the energy storage converter.

[0133] In one embodiment, if Figure 3 As shown, the power scheduling method includes:

[0134] Step 302: Energy management system scheduling begins.

[0135] Among them, the Energy Management System (EMS) is an intelligent system that integrates software and hardware to monitor, control and optimize energy flow and energy consumption in energy systems. Based on data collection, analysis and decision support technology, it can monitor the operating status of energy equipment, energy consumption and environmental conditions in real time, thereby achieving efficient management and optimization of energy.

[0136] Step 304, currently in the anti-backflow mode, if the judgment result is yes, execute step 306, if the judgment result is no, execute step 308.

[0137] Step 306, grid port power < electricity selling quota + reverse flow minimum limit, if the judgment result is yes, execute step 310, if the judgment result is no, execute step 312.

[0138] Among them, the power at the grid port is also the first power value, the electricity selling quota is also the set electricity selling power, and the minimum reverse flow limit is also the second power limit.

[0139] Step 308 , whether the current battery is at the maximum charging power and whether the grid port sells electricity at the maximum power, if the judgment result is yes, execute step 314 , if the judgment result is no, execute step 316 .

[0140] Step 310, exit the backflow prevention mode.

[0141] Step 312, reducing the target power value.

[0142] The target power value is also the target inverter power.

[0143] Step 314: Send the target power value.

[0144] Step 316, grid port power>power selling quota+reverse current maximum limit, if the judgment result is yes, execute step 318, if the judgment result is no, execute step 320.

[0145] The maximum reverse flow limit is also the first power limit.

[0146] Step 318, enter the backflow prevention mode.

[0147] Step 320, slowly increase the target power value.

[0148] Step 322: The target power value is limited and cannot be less than zero.

[0149] Step 324: The target power value is limited so as not to exceed the maximum inverter power.

[0150] Specifically, the PCS target power (ie, target power value) control is divided into an anti-backflow mode and a PCS power ramp-up mode, and the calculated PCS target power needs to be sent down for execution in real time (the recommended calculation period is less than 100ms).

[0151] (1) In the anti-backflow mode, the target power of the PCS will be quickly reduced (to a minimum of zero) until the grid port no longer has backflow (generally 1% of the rated power of the PCS). Then it will switch to the PCS power ramp-up mode.

[0152] (2) The power step value for anti-backflow reduction can be determined based on the anti-backflow limit time and stabilization time. If the step power is too small, it will cause the anti-backflow timeout, while if it is too large, it will cause the PCS power to overshoot, thus prolonging the stabilization time.

[0153] (3) In the PCS power ramp-up mode, the PCS target power will slowly increase. If the grid port starts to reverse flow (usually 5% of the PCS rated power), it will switch to the anti-reverse flow mode.

[0154] (4) In the PCS power ramp-up mode, if the battery is charged at the maximum power, the grid power approaches the maximum selling power (PV power is sufficient). The PCS target power no longer increases and remains in the current state (limited PV output power).

[0155] (5) In PCS power ramp-up mode, if the PCS actual power is less than the target power and the battery is not charged at the maximum power (PV power is insufficient), the PCS target power will continue to rise until it reaches the PCS maximum inverter power (slightly greater than the PCS rated power), in preparation for the subsequent pursuit of the PV maximum power.

[0156] Among them, PV power can be understood as the power generated by photovoltaic modules.

[0157] Among them, the power conversion system (PCS) can control the charging and discharging process of the battery, perform AC / DC conversion, and directly supply power to AC loads when there is no power grid.

[0158] In one embodiment, if Figure 4 As shown, the present invention provides a power dispatching device 400, including: an acquisition unit 402, used to acquire a first power value, the first power value is the power value at the grid port; a first processing unit 404, used to enter an anti-backflow mode based on the first power value being greater than the sum of a set power selling power and a first power limit; in the anti-backflow mode, based on the sum of a set power selling power and a second power limit being less than or equal to the first power value, the target inverter power of the energy storage converter is reduced; the acquisition unit 402 is also used to acquire an updated first power value; a second processing unit 406, used to exit the anti-backflow mode based on the updated first power value being less than the sum of a set power selling power and a second power limit; wherein the first power limit is greater than the second power limit.

[0159] The present invention proposes a power dispatching device 400. When the energy storage converter operates in the anti-backflow mode, if the power value at the grid port, the set power selling power and the first power limit satisfy the corresponding relationship, the anti-backflow mode will be entered. In the anti-backflow mode, the power value at the grid port will be compared with the set power selling power and the second power limit, and then the target inverter power of the energy storage converter will be reduced when the corresponding relationship is satisfied. In this process, the adjustment of the target inverter power will only be affected by the above parameters. Therefore, the degree to which the target inverter power is affected by the inverter power reported by the energy storage converter and the power collected at the grid port can be reduced.

[0160] In this process, compared with the calculation method of directly calculating the target inverter power by using the inverter power reported by the energy storage inverter and the power collected at the grid port, the power scheduling method proposed in the present invention can prevent the target inverter power from changing suddenly when the load power changes suddenly, thereby reducing the probability of a large error in the target inverter power, shortening the time required for the inverter power of the energy storage inverter to stabilize from oscillation, and enabling the energy storage inverter to be quickly controlled in the anti-reverse current mode.

[0161] In some technical solutions, optionally, the target inverter power is the inverter power that is desired to be achieved during the operation of the energy storage converter.

[0162] In some embodiments, optionally, the grid port can be understood to be a mains power port. Specifically, power can be supplied to the load through the mains power port, and power can also be supplied externally through the mains power port, that is, electricity can be sold externally.

[0163] Among them, in the power supply and distribution system, the distribution transformer generally supplies power to the load, and the current flows from the grid side to the load, which is called forward current. In the embodiment of the present application, the electric energy generated by photovoltaic power generation can be inverted by the energy storage converter and then supplied to the grid port. When the photovoltaic power generation power is greater than the local load power and the load cannot be fully absorbed, the remaining electric energy is fed into the grid, that is, it is connected to the mains through the grid port. Since the current direction is opposite to the conventional one, it is called reverse flow.

[0164] A normal photovoltaic power generation system converts the direct current of photovoltaic modules into alternating current and feeds it into the power grid. However, in the anti-reverse flow mode, the electricity generated by photovoltaic modules is only used for local loads, preventing the electricity generated by the photovoltaic system from being fed into the power grid.

[0165] Among them, the first power limit can be understood as the set power limit. By setting the first power limit, in order to add the first power limit when comparing the first power value with the set selling power, it is possible to avoid the energy storage converter from entering the anti-reverse current mode too early, reduce the frequency of the target inverter power oscillation, and achieve the power at the grid port being controlled within a stable range for a short time when there is a sudden change in the load power.

[0166] In some embodiments, the power sold may be set to a value of zero or other value greater than zero, which will not be described in detail here.

[0167] In this process, the second power limit is smaller than the first power limit, so that the conditions for entering and exiting the anti-reverse flow mode are different, and the second power limit is smaller than the first power limit, so that a fluctuation range is set for entering and exiting the anti-reverse flow mode. In this process, the energy storage inverter can frequently enter and exit the anti-reverse flow mode, thereby reducing the frequency of switching the operating mode of the energy storage inverter, thereby reducing the fluctuation frequency of the target inverter power.

[0168] In some embodiments, optionally, the first processing unit 404 is specifically used to: obtain a first duration and a second power value; control the target inverter power of the energy storage converter to reduce the second power value at intervals of the first duration; wherein the reduced target inverter power is greater than or equal to zero.

[0169] In this embodiment, the target inverter power of the energy storage converter adopts a step-by-step reduction strategy. During this process, while reducing the target inverter power, it is also possible to avoid the target inverter power being reduced too much in an instant, causing overshoot of the energy storage converter.

[0170] Specifically, when the target inverter power is reduced too much and overshoot occurs, the energy storage converter will frequently switch between the power climbing mode and the anti-reverse flow mode, prolonging the time it takes for the target inverter power to change from a sudden load change to a stable state.

[0171] In addition, by reasonably setting the second power value, the frequent switching between the power climbing mode and the anti-backflow mode can be reduced. If the target inverter power is reduced to a relatively low level in the anti-backflow mode, then when exiting the anti-backflow mode, that is, in the power climbing mode, it will take a longer time to increase the target inverter power until it stabilizes, at which time it will remain in the power climbing mode.

[0172] Specifically, under the joint action of the photovoltaic components and the energy storage components, the power value at the grid port is controlled at zero. At this time, the target inverter power will increase to the maximum inverter power.

[0173] In addition, the power generation power of the photovoltaic module not only enables the grid port to sell electricity at the maximum power, but also enables the energy storage module to be charged at the maximum charging power. At this time, the target inverter power will not increase and will remain consistent with the actual inverter power of the energy storage inverter.

[0174] By setting the first time length so as to utilize the first time length to limit the reduction frequency of the target inverter power, and setting the second power value so as to utilize the second power value to limit the amplitude of each reduction of the target inverter power, in this process, a step-by-step reduction of the target inverter power can be achieved, thereby realizing rapid control of the reverse current power.

[0175] In some embodiments, the value of the second power value can be determined according to actual usage requirements, which will not be elaborated here.

[0176] In the above embodiment, the target inverter power of the energy storage converter after reduction is limited to be greater than or equal to zero, so as to avoid the target inverter power from being reduced below zero, so that the target inverter power value is within an unfeasible range, thereby reducing the impact of the target inverter power on the operation of the energy storage converter, thereby improving the stability of the operation of the energy storage converter.

[0177] In some embodiments, optionally, the first processing unit 404 is also used to: obtain the charging power of the energy storage component; based on the charging power being the maximum charging power and the first power value being equal to the maximum selling power, keep the target inverter power of the energy storage converter unchanged.

[0178] In this embodiment, the energy storage component may be a battery pack, or may include a capacitor or other components capable of storing electrical energy.

[0179] In this embodiment, if the charging power of the energy storage component is the maximum charging power and the first power value is the maximum selling power, it is considered that the inverter power of the energy storage inverter is sufficient. By keeping the target inverter power unchanged, the energy storage inverter can continue to output power to the outside, thereby achieving full utilization of electric energy.

[0180] In some embodiments, the maximum charging power is a pre-set power value, which can be set according to the hardware parameters of the energy storage component or can be set by the user. Its specific value will not be described in detail here.

[0181] In some embodiments, the maximum electricity selling power is a pre-set power value, which can be set according to actual usage needs or by the user. Its specific value will not be repeated here.

[0182] In some embodiments, optionally, the first processing unit 404 is also used to: increase the target inverter power of the energy storage inverter based on the charging power being less than the maximum charging power and / or the first power value being less than the maximum power selling power, and the first power value being less than or equal to the sum of the set power selling power and the first power limit.

[0183] In this embodiment, if at least one of the charging power and the first power value is less than the corresponding comparison value, that is, at least one of the charging power is less than the maximum charging power and the first power value is less than the maximum selling power, then it is considered that the current energy storage inverter has insufficient inverter power. At this time, it is necessary to further determine whether it is necessary to enter the anti-reverse flow mode or to increase the target inverter power.

[0184] At this time, if the first power value is less than or equal to the sum of the set selling power and the first power limit, it is considered that the current inverter power of the energy storage converter is insufficient and the target inverter power needs to be increased. Therefore, the target inverter power of the energy storage converter is increased.

[0185] In this process, when the inverter power is insufficient, the inverter power of the energy storage converter can be increased by increasing the target inverter power, thereby meeting the inverter power demand of the energy storage converter.

[0186] In some embodiments, optionally, the first processing unit 404 is specifically used to: obtain a second duration and a third power value; control the target inverter power of the energy storage inverter to increase by a third power value every second duration; wherein the increased target inverter power of the energy storage inverter is less than or equal to the maximum inverter power value.

[0187] In this embodiment, the target inverter power of the energy storage converter adopts a step-by-step increase strategy. During this process, while increasing the target inverter power, it is also possible to avoid the target inverter power increasing too much instantly, causing overshoot of the energy storage converter.

[0188] Specifically, when the target inverter power increases too much and overshoot occurs, the energy storage converter will frequently switch between the power climbing mode and the anti-reverse flow mode, prolonging the time it takes for the target inverter power to change from a sudden load change to a stable state.

[0189] By setting the second time length so as to utilize the second time length to limit the frequency of increase of the target inverter power, and setting the third power value so as to utilize the third power value to limit the amplitude of each increase of the target inverter power, in this process, a step-by-step increase of the target inverter power can be achieved, thereby realizing rapid control of the reverse current power.

[0190] In some embodiments, the value of the third power value can be determined according to actual usage requirements, which will not be elaborated here.

[0191] In this embodiment, the maximum inverter power value is limited to prevent the energy storage converter from operating in excess of its set parameters, thereby affecting the reliability of the energy storage converter operation.

[0192] In some embodiments, optionally, the first power limit value is between 5% and 8% of the rated power of the energy storage converter; and / or the second power limit value is between 1% and 5% of the rated power of the energy storage converter.

[0193] In one embodiment, if Figure 5 As shown, the present invention provides another power scheduling device 500, including a processor 502 and a memory 504, wherein the memory 504 stores programs or instructions that can be executed on the processor 502, and when the programs or instructions are executed by the processor, the steps of any of the power scheduling methods described above are implemented.

[0194] Among them, the memory 504 can be used to store software programs and various data. The memory 504 mainly includes a first storage area for storing programs or instructions and a second storage area for storing data, wherein the first storage area can store an operating system, an application program or instruction required for at least one function (such as a sound playback function, an image playback function, etc.), etc. In addition, the memory 504 may include a volatile memory or a non-volatile memory, or the memory may include both volatile and non-volatile memories. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), a static random access memory (SRAM), a dynamic random access memory (DRAM), a synchronous dynamic random access memory (SDRAM), a double data rate synchronous dynamic random access memory (DDRSDRAM), an enhanced synchronous dynamic random access memory (ESDRAM), a synchronous link dynamic random access memory (SLDRAM) and a direct memory bus random access memory (DRRAM). The memory in the embodiments of the present application includes but is not limited to these and any other suitable types of memory.

[0195] In one of the embodiments, the present invention provides a readable storage medium, on which a program or instruction is stored, and when the program or instruction is executed by a processor, the steps of any of the power scheduling methods described above are implemented.

[0196] In one of the embodiments, the present invention provides a distribution box, comprising: any power dispatching device as described above; and / or a readable storage medium as described above.

[0197] The term "first" or "second" in the specification and claims of the present application may include one or more of the features explicitly or implicitly. In the textual description of the present invention, unless otherwise specified, "plurality" means two or more. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / " generally means that the objects connected before and after are in an "or" relationship.

[0198] In the text description of the present invention, it is understood that, except for explicit provisions and limitations, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be fixed connection, detachable connection, or integral connection; it can be mechanical structure connection or electrical connection; it can be direct connection between the two, or indirect connection between the two through an intermediate medium, or it can be internal communication between two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0199] In the claims, specification and drawings of the present invention, the description of the terms "one embodiment", "some embodiments", "specific embodiments" and the like means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In the claims, specification and drawings of the present invention, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0200] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A power scheduling method, characterized in that: include: Acquire a first power value, where the first power value is a power value at a power grid port; Based on the first power value being greater than the sum of the set power selling power and the first power limit value, entering the backflow prevention mode; In the backflow prevention mode, based on the sum of the set selling power and the second power limit being less than or equal to the first power value, reducing the target inverter power of the energy storage converter; Obtaining the updated first power value; exiting the anti-backflow mode based on that the updated first power value is less than the sum of the set power selling power and the second power limit value; The first power limit is greater than the second power limit.

2. The power scheduling method according to claim 1, characterized in that: The reducing the target inverter power of the energy storage converter specifically includes: Obtain a first duration and a second power value; Control the target inverter power of the energy storage converter to reduce the second power value at intervals of the first time length; The reduced target inverter power is greater than or equal to zero.

3. The power scheduling method according to claim 1 or 2, characterized in that: The power scheduling method further includes: Obtain the charging power of the energy storage component; Based on the fact that the charging power is the maximum charging power and the first power value is equal to the maximum selling power, the target inverter power of the energy storage converter is kept unchanged.

4. The power scheduling method according to claim 3, characterized in that: The power scheduling method further includes: Based on the fact that the charging power is less than the maximum charging power and / or the first power value is less than the maximum selling power, and the first power value is less than or equal to the sum of the set selling power and the first power limit, the target inverter power of the energy storage converter is increased.

5. The power scheduling method according to claim 4, characterized in that: The increasing the target inverter power of the energy storage converter specifically includes: Obtaining a second duration and a third power value; Controlling the target inverter power of the energy storage converter to increase the third power value at intervals of the second time length; Among them, the increased target inverter power of the energy storage converter is less than or equal to the maximum inverter power value.

6. The power scheduling method according to claim 1 or 2, characterized in that: The first power limit value is between 5% and 8% of the rated power of the energy storage converter; and / or The second power limit value is between 1% and 5% of the rated power of the energy storage converter.

7. A power dispatching device, characterized in that: include: An acquiring unit, configured to acquire a first power value, where the first power value is a power value at a power grid port; a first processing unit, configured to enter a backflow prevention mode based on that the first power value is greater than a sum of a set power selling power and a first power limit value; In the backflow prevention mode, based on the sum of the set selling power and the second power limit being less than or equal to the first power value, reducing the target inverter power of the energy storage converter; The acquisition unit is further used to acquire the updated first power value; a second processing unit, configured to exit the anti-backflow mode based on that the updated first power value is less than the sum of the set power selling power and the second power limit value; The first power limit is greater than the second power limit.

8. A power dispatching device, characterized in that: The method comprises a processor and a memory, wherein the memory stores programs or instructions that can be run on the processor, and when the programs or instructions are executed by the processor, the steps of the power scheduling method according to any one of claims 1 to 6 are implemented.

9. A readable storage medium, characterized in that: The readable storage medium stores a program or instruction, and when the program or instruction is executed by a processor, the steps of the power scheduling method according to any one of claims 1 to 6 are implemented.

10. A distribution box, characterized in that: include: The power dispatching device as claimed in claim 7 or 8; and / or The readable storage medium as claimed in claim 9.

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