Control method and device of networking type modular distributed energy storage cabin and storage medium

Abstract

The invention discloses a control method and device for a network-forming type modularized distributed energy storage cabin and a storage medium, and the method comprises the steps: enabling one energy storage cabin to serve as a main cabin of a grid-connected point when a plurality of energy storage cabins are disposed at the grid-connected point, and enabling the other energy storage cabins to serve as slave cabins, the main cabin and the slave cabin firstly execute the droop control strategy to obtain and apply the corresponding control parameters, then the main cabin shares the corresponding control parameters to the slave cabin, and the slave cabin applies the control parameters to enable the control parameters to be consistent with the main cabin after receiving the control parameters, so that all the energy storage cabins can respond in time, and the energy storage efficiency is improved. And subsequent mutual calculation noise caused by adjustment of the energy storage cabins according to the control parameters calculated separately can be avoided, finally, the adjustment frequency of the output power of the energy storage cabins can be reduced, repeated oscillation is avoided, and the stability of a power grid is enhanced.

Description

Technical Field

[0001] The present invention relates to the technical field of distributed energy storage industry, and in particular to a control method, device and storage medium for a networked modular distributed energy storage cabin. Background Art

[0002] With the rapid development of new energy in my country, the proportion of new energy in the overall energy is increasing rapidly. Since the power generation of new energy is unstable and random, it needs to be equipped with energy storage equipment to stabilize the output of new energy. Compared with traditional thermal power and hydropower equipment, the support capacity of new energy power generation equipment (such as photovoltaic panels, wind turbines) plus energy storage for the power grid is still relatively weak. If the proportion continues to increase, it will aggravate the instability of the power grid. Therefore, as the proportion of new energy power generation in energy gradually increases, the demand for grid-type energy storage equipment is getting stronger and stronger so that more new energy electricity can be absorbed.

[0003] At present, the more mature grid-building energy storage equipment is large container-type energy storage equipment, which stores large amounts of electricity, occupies a large area, makes a lot of noise during operation, and requires a high investment. Large energy storage power stations will use this type of equipment and centrally manage it. It is mainly used to support surrounding photovoltaic power stations and wind power stations, and its application scenarios are very limited. Compared with large container-type energy storage, the integrated outdoor energy storage cabin solves the shortcomings of large footprint and high investment, and its application scenarios are more flexible, but it does not have the ability to support the power grid, that is, it is a non-grid-building energy storage device. Therefore, a storage cabin with grid-building capabilities is needed to improve support for the power grid, enhance the stability of the power grid, and absorb more green electricity. Summary of the invention

[0004] In view of this, the present invention provides a control method, device and storage medium for a grid-type modular distributed energy storage cabin. In the method, when a plurality of energy storage cabins are deployed at a grid-connected point, one of the energy storage cabins is used as the main cabin of the grid-connected point, and the remaining energy storage cabins are used as slave cabins. The main cabin and the slave cabins first execute a droop control strategy to obtain and apply corresponding control parameters. Then the main cabin shares its corresponding control parameters with the slave cabin. After receiving the control parameters, the slave cabin applies the control parameters to make them consistent with the main cabin. This can ensure that all energy storage cabins respond in a timely manner, and avoid the adjustment of multiple energy storage cabins according to the separately calculated control parameters to become subsequent calculation noise for each other. Ultimately, the number of adjustments to the output power of the energy storage cabins can be reduced to avoid repeated oscillations, thereby enhancing the stability of the power grid.

[0005] According to one aspect of the present invention, a control method for a networked modular distributed energy storage cabin is provided, comprising:

[0006] Obtain the number of energy storage tanks in the grid connection point;

[0007] If the number of energy storage cabins is greater than one, one of the energy storage cabins in the grid-connected point is set as the main cabin, and the remaining energy storage cabins are set as slave cabins, so that when the grid voltage of the grid-connected point changes, the main cabin and the slave cabin execute the droop control strategy to obtain and apply the corresponding control parameters; the main cabin synchronizes the corresponding control parameters to the slave cabin; the slave cabin receives and applies the control parameters corresponding to the main cabin, and stops applying the control parameters corresponding to it.

[0008] In some embodiments, the method further comprises:

[0009] If the number of the energy storage compartments is equal to 1, the energy storage compartments execute a droop control strategy when the grid voltage of the grid connection point changes.

[0010] In some embodiments, the master cabin synchronizes the control results corresponding to the master cabin to the slave cabin via Ethernet, network cable or optical fiber.

[0011] In some embodiments, different grid connection points are connected via the cloud, and the method further includes:

[0012] Obtain information about power grid changes;

[0013] If the power grid change information includes the shutdown of a thermal power plant for overhaul, the energy storage compartment in the grid connection point is controlled as a power source to provide electrical energy to the outside.

[0014] In some embodiments, the energy storage compartment includes a battery cluster, and the battery cluster is connected to the battery side cavity through a first loop; wherein a first temperature sensor and a first water pump are provided on the first loop between the water outlet side of the battery side cavity and the battery cluster, and a second temperature sensor is provided on the first loop between the battery cluster and the water return side of the battery side cavity; the method further includes:

[0015] When the second temperature measured by the second temperature sensor is higher than the first preset value, the opening of the first water pump has not reached the maximum opening, and the first temperature measured by the first temperature sensor is lower than the second preset value, the opening of the first water pump is controlled to increase.

[0016] In some embodiments, the battery side cavity and the cold pipe of the first compressor perform heat exchange; the method further includes:

[0017] When the first temperature measured by the first temperature sensor is higher than a third preset value, the first compressor is controlled to refrigerate until the first temperature is equal to the third preset value, so that the temperature of the coolant in the battery side cavity is reduced.

[0018] In some embodiments, the energy storage cabin further includes an energy storage inverter, which is connected to the energy storage inverter side cavity through a second circuit; a third temperature sensor is provided on the second circuit between the energy storage inverter and the return water side of the energy storage inverter side cavity, and a fourth temperature sensor and a second water pump are provided on the second circuit between the water outlet side of the energy storage inverter side cavity and the energy storage inverter; the method further includes:

[0019] When the third temperature measured by the third temperature sensor is higher than the fourth preset value, the opening of the second water pump has not reached the maximum opening, and the fourth temperature measured by the fourth temperature sensor is lower than the fifth preset value, the opening of the second water pump is controlled to increase.

[0020] In some embodiments, the energy storage inverter side cavity and the cold pipe of the second compressor perform heat exchange, and the method further includes:

[0021] When the fourth temperature measured by the fourth temperature sensor is higher than the sixth preset value, the second compressor is controlled to refrigerate until the fourth temperature is equal to the sixth preset value, so that the temperature of the coolant in the side cavity of the energy storage inverter is reduced.

[0022] According to another aspect of the present invention, a control device for a networked modular distributed energy storage cabin is provided, comprising:

[0023] An acquisition unit, used to acquire the number of energy storage compartments in the grid connection point;

[0024] A setting unit is used for setting one of the energy storage cabins in the grid-connected point as a main cabin and the other energy storage cabins as slave cabins if the number of the energy storage cabins is greater than one, so that when the grid voltage of the grid-connected point changes, the main cabin and the slave cabin execute a droop control strategy to obtain and apply corresponding control parameters; the main cabin synchronizes the corresponding control parameters to the slave cabin; the slave cabin receives and applies the control parameters corresponding to the main cabin, and stops applying the control parameters corresponding to it.

[0025] According to another aspect of the present invention, a storage medium is provided, wherein the storage medium stores at least one executable instruction, and the executable instruction enables a processor to execute the control method of the networked modular distributed energy storage cabin as described.

[0026] According to another aspect of the present invention, there is provided a terminal, comprising: a processor, a memory, a communication interface and a communication bus, wherein the processor, the memory and the communication interface communicate with each other via the communication bus;

[0027] The memory is used to store at least one executable instruction, and the executable instruction enables the processor to execute the control method of the networked modular distributed energy storage cabin as described.

[0028] The present invention provides a control method, device and storage medium for a grid-type modular distributed energy storage cabin. In the method, when a plurality of energy storage cabins are deployed at a grid connection point, one of the energy storage cabins is used as the main cabin of the grid connection point, and the remaining energy storage cabins are used as slave cabins. The main cabin and the slave cabins first execute a droop control strategy to obtain and apply corresponding control parameters. Then the main cabin shares the control parameters corresponding to it with the slave cabin. After receiving the control parameters, the slave cabin applies the control parameters to make them consistent with the main cabin. In this way, all energy storage cabins can be guaranteed to respond in time, and multiple energy storage cabins can be prevented from adjusting according to the respectively calculated control parameters to become subsequent calculation noises for each other. Finally, the number of adjustments of the output power of the energy storage cabins can be reduced to avoid repeated oscillations, thereby enhancing the stability of the power grid.

[0029] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented according to the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0031] Figure 1 A flowchart of controlling a networked modular distributed energy storage cabin provided according to some embodiments is exemplarily shown;

[0032] Figure 2 The schematic diagram of the structure of a first loop and a second loop provided according to some embodiments is exemplarily shown;

[0033] Figure 3 A schematic diagram of the structure of a control device for a networked modular distributed energy storage cabin provided according to some embodiments is exemplarily shown;

[0034] Figure 4 A schematic diagram of the structure of a terminal provided according to an embodiment of the present invention is shown. DETAILED DESCRIPTION

[0035] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0036] In order to solve the above technical problems, an embodiment of the present application provides a control method for a grid-type modular distributed energy storage cabin. In this method, when a plurality of energy storage cabins are deployed at a grid-connected point, one of the energy storage cabins is used as the main cabin of the grid-connected point, and the remaining energy storage cabins are used as slave cabins. The main cabin and the slave cabin first execute a droop control strategy to obtain and apply corresponding control parameters. Then the main cabin shares its corresponding control parameters with the slave cabin. After receiving the control parameters, the slave cabin applies the control parameters to make them consistent with the main cabin. This can ensure that all energy storage cabins respond in a timely manner, and avoid the adjustment of multiple energy storage cabins according to the separately calculated control parameters to become subsequent calculation noise for each other. Ultimately, the number of adjustments to the output power of the energy storage cabin can be reduced to avoid repeated oscillations, thereby enhancing the stability of the power grid.

[0037] Figure 1 A flow chart of a control method for a grid-type modular distributed energy storage cabin provided according to some embodiments is exemplarily shown, and the method includes S100-S200.

[0038] S100. Obtain the number of energy storage compartments in the grid connection point.

[0039] In the embodiment of the present application, there may be one or more energy storage cabins in the grid connection point. Since there are multiple energy storage cabins in the grid connection point, if each energy storage cabin calculates the control result using the droop control strategy for the grid voltage of the grid connection point, the control results affect each other, which will cause high-frequency oscillation of the grid voltage. Therefore, in the embodiment of the present application, different control methods are performed for different numbers of energy storage cabins. Specifically, because the energy storage inverter (PCS, Power Convers ion System) detects the grid voltage, if it is found that the grid voltage changes beyond the threshold, it starts to adjust the PCS output power to provide support for the grid. Therefore, if it is found that the grid voltage droops, the output power will be increased. If all energy storage cabins find that the grid voltage has become low, all energy storage cabins will increase the output power, and the power will be too large in an instant, and the grid voltage will become high, exceeding the normal value. Then each energy storage cabin begins to adjust its output power again, so that in a very short time, all energy storage cabins continue to adjust their output power, forming an oscillation, which is manifested in that the output power of all energy storage cabins has been fluctuating all the time, which may eventually lead to instability. Therefore, in the embodiments of the present application, different control methods are executed for different numbers of energy storage compartments.

[0040] S200. If the number of the energy storage cabins is greater than one, one of the energy storage cabins in the grid-connected point is set as the main cabin, and the remaining energy storage cabins are set as slave cabins, so that when the grid voltage of the grid-connected point changes, the main cabin and the slave cabin execute the droop control strategy to obtain and apply the corresponding control parameters; the main cabin synchronizes the corresponding control parameters to the slave cabin; the slave cabin receives and applies the control parameters corresponding to the main cabin, and stops applying the control parameters corresponding to it.

[0041] In the embodiment of the present application, the droop control strategy is a prior art, which controls the energy storage inverter to adjust the output power and ensures the stability of the output voltage of the energy storage inverter.

[0042] In the embodiment of the present application, when the grid voltage at the grid connection point changes, the master cabin and the slave cabin first calculate the corresponding control parameters according to the change using the droop control strategy, and apply the control parameters, so that all energy storage cabins can withstand the impact of sudden voltage changes. Then the master cabin shares the corresponding control results with the slave cabin. When the slave cabin receives the control results shared by the master cabin, it no longer applies the control parameters calculated by itself, but applies the control parameters shared by the master cabin.

[0043] In this way, it can be ensured that when there are multiple energy storage cabins in the grid connection point, after the multiple energy storage cabins respond quickly, the control results are shared by the set master cabin to the slave cabin. In the end, the master cabin is always in control of the overall situation and can finally converge without oscillation.

[0044] In some embodiments, the method further comprises:

[0045] If the number of the energy storage compartments is equal to 1, the energy storage compartments execute a droop control strategy when the grid voltage of the grid connection point changes.

[0046] In the embodiment of the present application, when the number of energy storage compartments in the grid connection point is 1, the energy storage compartment directly implements the droop control strategy to adjust the output power and ensure the stability of the grid voltage.

[0047] In some embodiments, the master cabin synchronizes the control results corresponding to the master cabin to the slave cabin via Ethernet, network cable or optical fiber.

[0048] In some embodiments, different grid connection points are connected via the cloud, and the method further includes:

[0049] Obtain information about power grid changes.

[0050] If the power grid change information includes that the thermal power plant is shut down for overhaul, the energy storage cabin in the grid connection point is controlled to serve as a power source to provide electrical energy to the outside.

[0051] Specifically, after different grid connection points are connected through the cloud, the cloud can understand the grid change information of different grid connection points. If the cloud knows that a thermal power plant is going to be overhauled, the quality of power supply in the nearby power grid will decline. If there are a large number of energy storage cabins in the surrounding area, the cloud platform can be used to control the energy storage cabins in some of the surrounding grid connection points to become power sources to stabilize the voltage.

[0052] In the embodiment of the present application, the energy storage cabin in the grid connection point can be controlled and adjusted to achieve the purpose of network support. In addition, different grid connection points can be connected through the cloud. When equipped with cloud control, the energy storage cabin in the grid connection point can participate in more macro-regulation. In a planned case, the control mode of the energy storage cabins distributed in various places can be set in advance, that is, they can be set as power sources, so as to improve the anti-shock capability of the power grid in a targeted manner. In summary, the small outdoor energy storage cabin can have the ability to support the stability of the grid and can accept dispatching instructions to form a more macro-grid support regulation.

[0053] In some embodiments, Figure 2 The schematic diagram of the structure of providing a first loop and a second loop according to some embodiments is exemplarily shown.

[0054] The energy storage cabin includes a battery cluster (i.e., heat source A in the figure), which is connected to the battery side cavity through a first circuit; wherein, a first temperature sensor 1 and a first water pump 2 are provided on the first circuit between the water outlet side of the battery side cavity and the battery cluster, and a second temperature sensor 3 is provided on the first circuit between the battery cluster and the return water side of the battery side cavity. The energy storage cabin also includes an energy storage inverter (i.e., heat source B in the figure), which is connected to the energy storage inverter side cavity (i.e., the PCS side cavity in the figure) through a second circuit; a third temperature sensor 4 is provided on the second circuit between the energy storage inverter and the return water side of the energy storage inverter side cavity, and a fourth temperature sensor 5 and a second water pump 6 are provided on the second circuit between the water outlet side of the energy storage inverter side cavity and the energy storage inverter.

[0055] In the embodiment of the present application, the battery cluster is cooled through the first circuit, and the coolant flows from the water outlet side of the battery side cavity to the battery cluster through the power provided by the first water pump and cools the battery cluster, and then flows to the water return side of the battery side cavity. The first temperature sensor is used to measure the temperature of the coolant located between the water outlet side of the battery side cavity and the battery cluster in the first circuit. The second temperature sensor is used to measure the temperature of the coolant located between the battery cluster and the water return side of the battery side cavity in the first circuit.

[0056] The energy storage inverter is cooled through the second circuit, and the coolant flows from the outlet side of the energy storage inverter side cavity through the second water pump to the direction of the energy storage inverter and cools the energy storage inverter, and then flows to the return water side of the energy storage inverter side cavity. The third temperature sensor is used to measure the temperature of the coolant located between the energy storage inverter and the return water side of the energy storage inverter side cavity in the second circuit. The fourth temperature sensor is used to measure the temperature of the coolant located between the energy storage inverter and the outlet side of the energy storage inverter side cavity in the second circuit.

[0057] In some embodiments, the method further comprises:

[0058] When the second temperature measured by the second temperature sensor is higher than the first preset value, the opening of the first water pump has not reached the maximum opening, and the first temperature measured by the first temperature sensor is lower than the second preset value, the opening of the first water pump is controlled to increase.

[0059] In the embodiment of the present application, the first preset value and the second preset value can be set according to actual needs. When the second temperature measured by the second temperature sensor is higher than the first preset value, the opening of the first water pump has not reached the maximum opening, and the first temperature measured by the first temperature sensor is lower than the second preset value, it is determined that the heat generation rate of the battery cluster has increased. At this time, by increasing the opening of the first water pump, the flow rate of the coolant is increased, and the heat is brought back to the liquid storage chamber faster.

[0060] In some embodiments, the battery side cavity and the cold pipe of the first compressor exchange heat; the method further includes: when the first temperature measured by the first temperature sensor is higher than a third preset value, the first compressor is controlled to refrigerate until the first temperature is equal to the third preset value, so that the temperature of the coolant in the battery side cavity is reduced. In the embodiment of the present application, the third preset value is set according to actual needs. When the first temperature is higher than the third preset value, the compressor refrigeration will be started, and when the first temperature is equal to the third preset value, the compressor is controlled to stop refrigeration.

[0061] In some embodiments, the method further comprises:

[0062] When the third temperature measured by the third temperature sensor is higher than the fourth preset value, the opening of the second water pump has not reached the maximum opening, and the fourth temperature measured by the fourth temperature sensor is lower than the fifth preset value, the opening of the second water pump is controlled to increase.

[0063] In the embodiment of the present application, the fourth preset value and the fifth preset value can be set according to actual needs. When the third temperature measured by the third temperature sensor is higher than the fourth preset value, the opening of the second water pump has not reached the maximum opening, and the fourth temperature measured by the fourth temperature sensor is lower than the fifth preset value, it is determined that the heat generation rate of the energy storage inverter has increased. At this time, by increasing the opening of the second water pump, the speed of the coolant is increased, and the heat is brought back to the liquid storage chamber faster.

[0064] In some embodiments, the energy storage inverter side cavity and the cold pipe of the second compressor exchange heat, and the method further includes: when the fourth temperature measured by the fourth temperature sensor is higher than the sixth preset value, the second compressor is controlled to refrigerate until the fourth temperature is equal to the sixth preset value, so that the temperature of the coolant in the energy storage inverter side cavity is reduced. In the embodiment of the present application, the sixth preset value is set according to actual needs. When the fourth temperature is higher than the sixth preset value, the compressor refrigeration will be started, and when the fourth temperature is equal to the sixth preset value, the compressor is controlled to stop refrigeration.

[0065] In the related art, the battery side of the energy storage cabin uses air cooling, which is noisy and has a poor cooling effect on the battery cells. When the air conditioner is working, the overall temperature of the battery cells drops, but the temperature difference between the battery cells tends to increase. The reason for the larger temperature difference is that the distance between the battery cells and the cold air is different. The temperature of the battery cells closest to the cold air outlet will drop rapidly, but the temperature of the battery cells far from the air outlet drops slowly. Therefore, the overall temperature drops but the temperature difference increases. When the energy storage inverter is working, the heat is high and it takes a long time to start the fan for cooling, and the noise is more persistent. Therefore, the existing outdoor energy storage cabins are basically placed in factories and other places that are not very sensitive to noise. In the embodiment of the present application, the use of coolant to cool the energy storage cabin is selected, and the cooling effect is better and more uniform. It can also reasonably control the operation of the compressor and the water pump, reduce the equipment operation time, thereby reducing energy consumption and the duration of noise. Because centralized heat dissipation is more efficient, the intensity of the noise is also reduced.

[0066] The embodiment of the present application provides a control method, device and storage medium for a grid-connected modular distributed energy storage cabin. In the method, when a plurality of energy storage cabins are deployed at a grid connection point, one of the energy storage cabins is used as the master cabin of the grid connection point, and the remaining energy storage cabins are used as slave cabins. The master cabin and the slave cabin first execute a droop control strategy to obtain and apply corresponding control parameters. Then the master cabin shares its corresponding control parameters with the slave cabin. After receiving the control parameters, the slave cabin applies the control parameters to make them consistent with the master cabin. This can ensure that all energy storage cabins respond in a timely manner and avoid the adjustment of multiple energy storage cabins according to the separately calculated control parameters to become subsequent calculation noise for each other, thereby ultimately reducing the number of oscillations of the output power of the energy storage cabins and enhancing the stability of the power grid.

[0067] Furthermore, as a response to the above Figure 1The implementation of the method shown in the figure, the embodiment of the present invention provides a control device for a networked modular distributed energy storage cabin, such as Figure 3 As shown, the device comprises:

[0068] An acquisition unit 301 is used to acquire the number of energy storage compartments in the grid connection point;

[0069] The setting unit 302 is used to set one of the energy storage cabins in the grid-connected point as the main cabin, and set the remaining energy storage cabins as slave cabins if the number of the energy storage cabins is greater than one, so that when the grid voltage of the grid-connected point changes, the main cabin and the slave cabin execute the droop control strategy to obtain and apply the corresponding control parameters; the main cabin synchronizes the corresponding control parameters to the slave cabin; the slave cabin receives and applies the control parameters corresponding to the main cabin, and stops applying the control parameters corresponding to it.

[0070] According to one embodiment of the present invention, a storage medium is provided, wherein the storage medium stores at least one executable instruction, and the computer executable instruction can execute the control method of the networked modular distributed energy storage cabin in any of the above method embodiments.

[0071] Figure 4 A schematic diagram of the structure of a terminal provided according to an embodiment of the present invention is shown. The specific embodiment of the present invention does not limit the specific implementation of the terminal.

[0072] like Figure 4 As shown, the terminal may include: a processor (processor) 402, a communication interface (Communications Interface) 404, a memory (memory) 406, and a communication bus 408.

[0073] The processor 402 , the communication interface 404 , and the memory 406 communicate with each other via a communication bus 408 .

[0074] The communication interface 404 is used to communicate with other devices such as clients or other servers.

[0075] Processor 402 is used to execute program 410, and specifically can execute the relevant steps in the above-mentioned control method embodiment of the networked modular distributed energy storage cabin.

[0076] Specifically, the program 410 may include program codes, which include computer operation instructions.

[0077] The processor 402 may be a central processing unit (CPU), or an application specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiment of the present invention. The one or more processors included in the terminal may be processors of the same type, such as one or more CPUs; or processors of different types, such as one or more CPUs and one or more ASICs.

[0078] The memory 406 is used to store the program 410. The memory 406 may include a high-speed RAM memory, and may also include a non-volatile memory, such as at least one disk memory.

[0079] Obviously, those skilled in the art should understand that the above modules or steps of the present invention can be implemented by a general computing device, they can be concentrated on a single computing device, or distributed on a network composed of multiple computing devices, and optionally, they can be implemented by a program code executable by a computing device, so that they can be stored in a storage device and executed by the computing device, and in some cases, the steps shown or described can be executed in a different order than here, or they can be made into individual integrated circuit modules, or multiple modules or steps therein can be made into a single integrated circuit module for implementation. Thus, the present invention is not limited to any specific combination of hardware and software.

[0080] The above description is only a preferred embodiment of the present invention and is 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 control method for a networked modular distributed energy storage cabin, characterized in that: include: Obtain the number of energy storage tanks in the grid connection point; If the number of energy storage cabins is greater than 1, one of the energy storage cabins in the grid connection point is set as the main cabin, and the remaining energy storage cabins are set as slave cabins, so that when the grid voltage of the grid connection point changes, the main cabin and the slave cabin execute the droop control strategy to obtain and apply the corresponding control parameters; the main cabin synchronizes the corresponding control parameters to the slave cabin; The slave cabin receives and applies the control parameters corresponding to the master cabin, and stops applying the control parameters corresponding to the master cabin.

2. The method according to claim 1, characterized in that The method further comprises: If the number of the energy storage compartments is equal to 1, the energy storage compartments execute a droop control strategy when the grid voltage of the grid connection point changes.

3. The method according to claim 1, characterized in that The master cabin synchronizes the control result corresponding to the master cabin to the slave cabin via Ethernet, network cable or optical fiber.

4. The method according to claim 1, characterized in that: Different grid connection points are connected via the cloud, and the method further includes: Obtain information about power grid changes; If the power grid change information includes the shutdown of a thermal power plant for overhaul, the energy storage compartment in the grid connection point is controlled as a power source to provide electrical energy to the outside.

5. The method according to claim 1, characterized in that The energy storage compartment includes a battery cluster, and the battery cluster is connected to the battery side cavity through a first loop; wherein a first temperature sensor and a first water pump are provided on the first loop between the water outlet side of the battery side cavity and the battery cluster, and a second temperature sensor is provided on the first loop between the battery cluster and the water return side of the battery side cavity; the method further includes: When the second temperature measured by the second temperature sensor is higher than the first preset value, the opening of the first water pump has not reached the maximum opening, and the first temperature measured by the first temperature sensor is lower than the second preset value, the opening of the first water pump is controlled to increase.

6. The method according to claim 5, characterized in that The battery side cavity and the cold pipe of the first compressor are heat exchanged; the method further comprises: When the first temperature measured by the first temperature sensor is higher than a third preset value, the first compressor is controlled to refrigerate until the first temperature is equal to the third preset value, so that the temperature of the coolant in the battery side cavity is reduced.

7. The method according to claim 5, characterized in that The energy storage cabin also includes an energy storage inverter, which is connected to the energy storage inverter side cavity through a second circuit; a third temperature sensor is provided on the second circuit between the energy storage inverter and the return water side of the energy storage inverter side cavity, and a fourth temperature sensor and a second water pump are provided on the second circuit between the water outlet side of the energy storage inverter side cavity and the energy storage inverter; the method also includes: When the third temperature measured by the third temperature sensor is higher than the fourth preset value, the opening of the second water pump has not reached the maximum opening, and the fourth temperature measured by the fourth temperature sensor is lower than the fifth preset value, the opening of the second water pump is controlled to increase.

8. The method according to claim 7, characterized in that The energy storage inverter side cavity and the cold pipe of the second compressor are heat exchanged, and the method further includes: When the fourth temperature measured by the fourth temperature sensor is higher than the sixth preset value, the second compressor is controlled to refrigerate until the fourth temperature is equal to the sixth preset value, so that the temperature of the coolant in the side cavity of the energy storage inverter is reduced.

9. A control device for a networked modular distributed energy storage cabin, characterized in that: include: An acquisition unit, used to acquire the number of energy storage compartments in the grid connection point; A setting unit is used for setting one of the energy storage cabins in the grid connection point as a master cabin if the number of the energy storage cabins is greater than one, and setting the remaining energy storage cabins as slave cabins, so that when the grid voltage of the grid connection point changes, the master cabin and the slave cabin execute a droop control strategy to obtain and apply corresponding control parameters; the master cabin synchronizes the corresponding control parameters to the slave cabin; The slave cabin receives and applies the control parameters corresponding to the master cabin, and stops applying the control parameters corresponding to the master cabin.

10. A storage medium, wherein at least one executable instruction is stored in the storage medium, and the executable instruction enables a processor to execute the control method of a networked modular distributed energy storage cabin as described in any one of claims 1 to 8.

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