A new energy storage power station and energy storage system

Abstract

The utility model discloses a new energy energy storage power station and energy storage system, include: first energy storage converter PCS1, second energy storage converter PCS2, first direct current collecting box, second direct current collecting box, first energy storage battery stack, second energy storage battery stack, first energy storage converter PCS1 is connected to first energy storage battery stack through first direct current collecting box, second energy storage converter PCS2 is connected to second energy storage battery stack through second direct current collecting box, first energy storage converter PCS1 still connects second direct current collecting box, second energy storage converter PCS2 still connects first direct current collecting box. In prior art, the installed capacity of new energy industry is more and more big, and the fault is inevitable, and too many faults can cause the utilization of energy storage system participating in the power grid work to reduce, and based on this, the scheme of the application can effectively improve the utilization of energy storage system participating in the power grid work.

Description

Technical Field

[0001] This utility model relates to the field of new energy storage, and in particular to a new energy storage power station and energy storage system. Background Technology

[0002] The booming development of the new energy industry in recent years, coupled with the economic, environmentally friendly, and self-manageable characteristics of energy storage products, has sparked a wave of energy transformation both domestically and internationally. At the same time, as a crucial supporting component of the new energy industry, new energy storage power stations have received widespread attention, with demand increasing year by year.

[0003] However, with the increasing installed capacity of the new energy industry, malfunctions are inevitable, and excessive malfunctions mean reduced utilization. Therefore, the industry needs to design a solution to effectively improve the utilization rate of energy storage systems in grid operation. Utility Model Content

[0004] The technical problem to be solved by this utility model is: how to design a new energy storage power station and energy storage system that can effectively improve the utilization rate of the energy storage system in grid operation.

[0005] In a first aspect, this utility model embodiment proposes a new energy storage power station, which includes: a first energy storage converter PCS1, a second energy storage converter PCS2, a first DC combiner cabinet, a second DC combiner cabinet, a first energy storage battery stack, and a second energy storage battery stack; the first energy storage converter PCS1 is connected to the first energy storage battery stack via the first DC combiner cabinet, the second energy storage converter PCS2 is connected to the second energy storage battery stack via the second DC combiner cabinet, the first energy storage converter PCS1 is also connected to the second DC combiner cabinet, and the second energy storage converter PCS2 is also connected to the first DC combiner cabinet.

[0006] Furthermore, the first DC combiner cabinet of the new energy storage power station includes a first display and control unit (BAU1), a first electric switch (K11), and a second electric switch (K12).

[0007] A further technical solution is that the second DC combiner cabinet of the new energy storage power station includes a second display and control unit BAU2, a third electric switch K21, and a fourth electric switch K22.

[0008] A further technical solution is that the first energy storage converter PCS1 is connected to the first energy storage battery stack via the first electric switch K11 of the first DC combiner cabinet, and the first energy storage converter PCS1 is connected to the second energy storage battery stack via the second electric switch K12 of the first DC combiner cabinet; the second energy storage converter PCS2 is connected to the second energy storage battery stack via the third electric switch K21 of the second DC combiner cabinet, and the second energy storage converter PCS2 is connected to the second energy storage battery stack via the fourth electric switch K22 of the second DC combiner cabinet.

[0009] A further technical solution is that the new energy storage power station also includes an energy management unit (EMS), which is communicatively connected to the first energy storage converter (PCS1) and the second energy storage converter (PCS2).

[0010] A further technical solution is that the energy management unit (EMS) controls the first electric switch K11 and the second electric switch K12 through the first display and control unit (BAU1).

[0011] A further technical solution is that the energy management unit (EMS) controls the third electric switch K21 and the fourth electric switch K22 through the second display and control unit (BAU2).

[0012] Secondly, this utility model proposes an energy storage system, which includes a new energy storage power station as described in the first aspect.

[0013] The beneficial effects of the above scheme include that a single PCS failure has no impact on the energy storage stack (whether it is a failure of the first or second energy storage converter). The energy storage stack can still be switched to a normal energy storage converter PCS through the DC combiner cabinet, ensuring the utilization rate of the energy storage stack.

[0014] The beneficial effects of the above scheme also include that when the energy storage converter PCS side is maintained and serviced, the energy storage battery stack can be switched to another PCS through the DC combiner cabinet, ensuring that all energy storage battery stacks still participate in grid operation and that one of the energy storage battery stacks will not stop working due to maintenance and service.

[0015] In summary, as a crucial supporting link in the new energy industry, the development of new energy storage power stations has attracted widespread attention, with demand increasing year by year. However, with the ever-growing installed capacity of the new energy industry, failures are inevitable, and excessive failures mean that utilization rates are affected. Therefore, the industry needs to design a solution to effectively improve the utilization rate of energy storage systems participating in grid operations. Based on this, the solution described in this application can effectively improve the utilization rate of energy storage systems participating in grid operations, that is, even when the energy storage converter PCS fails, the utilization rate of the energy storage power station participating in grid operations can still be guaranteed to remain unaffected. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a structural schematic diagram of the new energy storage power station proposed in this utility model.

[0018] Figure 2 This is another structural schematic diagram of the new energy storage power station proposed in this utility model.

[0019] Figure 3 This is another structural schematic diagram of the new energy storage power station proposed in this utility model. Detailed Implementation

[0020] The technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Similar component reference numerals in the drawings represent similar components. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0021] It should be understood that the terminology used in this specification of embodiments of the present invention is for the purpose of describing particular embodiments only and is not intended to limit the embodiments of the present invention. As used in this specification of embodiments of the present invention and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0022] Example See Figures 1 to 3As shown, this utility model provides a new energy storage power station, which includes: a first energy storage converter PCS1, a second energy storage converter PCS2, a first DC combiner cabinet 1, a second DC combiner cabinet 2, a first energy storage battery stack 3, and a second energy storage battery stack 4. The first energy storage converter PCS1 is connected to the first energy storage battery stack 3 through the first DC combiner cabinet 1, and the second energy storage converter PCS2 is connected to the second energy storage battery stack 4 through the second DC combiner cabinet 2. The first energy storage converter PCS1 is also connected to the second DC combiner cabinet 2, and the second energy storage converter PCS2 is also connected to the first DC combiner cabinet 1.

[0023] Furthermore, the first DC combiner cabinet 1 of the new energy storage power station includes a first display and control BAU1, a first electric switch K11, and a second electric switch K12.

[0024] A further technical solution is that the second DC combiner cabinet 2 of the new energy storage power station includes a second display and control BAU2, a third electric switch K21 and a fourth electric switch K22.

[0025] A further technical solution is that the first energy storage converter PCS1 is connected to the first energy storage battery stack 3 via the first electric switch K11 of the first DC combiner cabinet 1, and the first energy storage converter PCS1 is connected to the second energy storage battery stack 4 via the second electric switch K12 of the first DC combiner cabinet 1; the second energy storage converter PCS2 is connected to the second energy storage battery stack 4 via the third electric switch K21 of the second DC combiner cabinet 2, and the second energy storage converter PCS2 is connected to the second energy storage battery stack 4 via the fourth electric switch K22 of the second DC combiner cabinet 2.

[0026] A further technical solution is that the new energy storage power station also includes an energy management unit (EMS), which is communicatively connected to the first energy storage converter (PCS1) and the second energy storage converter (PCS2).

[0027] A further technical solution is that the energy management unit (EMS) controls the first electric switch K11 and the second electric switch K12 through the first display and control unit (BAU1).

[0028] A further technical solution is that the energy management unit (EMS) controls the third electric switch K21 and the fourth electric switch K22 through the second display and control unit (BAU2).

[0029] The beneficial effects of the above scheme include that a single PCS failure has no impact on the energy storage stack (whether it is a failure of the first or second energy storage converter). The energy storage stack can still be switched to a normal energy storage converter PCS through the DC combiner cabinet, ensuring the utilization rate of the energy storage stack.

[0030] The beneficial effects of the above scheme also include that when the energy storage converter PCS side is maintained and serviced, the energy storage battery stack can be switched to another PCS through the DC combiner cabinet, ensuring that all energy storage battery stacks still participate in grid operation and that one of the energy storage battery stacks will not stop working due to maintenance and service.

[0031] In this embodiment of the utility model, there are two PCS (first energy storage converter PCS1 and second energy storage converter PCS2) in an intelligent power supply cabinet, two DC combiner cabinets (first DC combiner cabinet 1 and second DC combiner cabinet 2), two energy storage battery stacks (first energy storage battery stack 3 and second energy storage battery stack 4), and one energy management unit (EMS); wherein the first DC combiner cabinet 1 includes a first display and control BAU1, a first electric switch K11 and a second electric switch K12, and the second DC combiner cabinet 2 includes a second display and control BAU2, a third electric switch K21 and a fourth electric switch K22.

[0032] The working principle of the present invention is as follows: The first energy storage battery stack 3 can establish an electrical connection with the first energy storage converter PCS1 through the first electric switch K11 in the first DC combiner cabinet 1. The first energy storage battery stack 3 can also establish an electrical connection with the second energy storage converter PCS2 through the third electric switch K21 in the DC combiner cabinet 2. Furthermore, the second energy storage battery stack 4 can establish an electrical connection with the first energy storage converter PCS1 through the second electric switch K12 in the first DC combiner cabinet 1. The second energy storage battery stack 4 can also establish an electrical connection with the second energy storage converter PCS2 through the fourth electric switch K22 in the DC combiner cabinet 2. Furthermore, the energy management unit (EMS) can monitor the data and status of the first display and control unit (BAU1), the second display and control unit (BAU2), the first energy storage converter PCS1, and the second energy storage converter PCS2 in real time. The first display and control unit (BAU1) monitors the data and status of the first energy storage battery stack 3 in real time, and the second display and control unit (BAU2) monitors the data and status of the second energy storage battery stack 4 in real time.

[0033] When the first energy storage converter PCS1 fails due to a grid fault, or when maintenance is required, the first energy storage battery stack 3 can establish an electrical connection with the second energy storage converter PCS2 through the third electric switch K21 in the DC combiner cabinet 2, and thus continue to participate in grid operation.

[0034] When the second energy storage converter PCS2 fails due to a grid fault, or when maintenance is required, the second energy storage battery stack 4 can establish an electrical connection with the first energy storage converter PCS1 through the second electric switch K12 in the first DC combiner cabinet 1, and thus continue to participate in grid operation.

[0035] In one embodiment, the present invention proposes an energy storage system, which includes a new energy storage power station as described in any of the above embodiments. The energy storage power station in the energy storage system can effectively improve the utilization rate of the energy storage system in grid operation.

[0036] In summary, the booming development of the new energy industry in recent years, coupled with the economic, environmentally friendly, and self-manageable characteristics of energy storage products, has sparked a wave of energy transformation both domestically and internationally. Simultaneously, new energy storage power stations, as a crucial supporting link in the new energy industry, have received widespread attention, with demand increasing year by year. However, with the ever-growing installed capacity of the new energy industry, failures are inevitable, and excessive failures mean reduced utilization. Therefore, the industry needs to design a solution to effectively improve the utilization rate of energy storage systems participating in grid operation. Based on this, the solution described in this application can effectively improve the utilization rate of energy storage systems participating in grid operation, meaning that even in the event of a failure in the energy storage converter PCS, the utilization rate of the energy storage power station participating in grid operation can still be guaranteed to remain unaffected.

[0037] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0038] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0039] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0040] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0041] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. The illustrative expressions of the above terms in this specification should not be construed as necessarily referring to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0042] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Since these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

[0043] The above description describes specific embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the scope of protection of this utility model. Therefore, the scope of protection of this utility model should be determined by the scope of the claims.

Claims

1. A new energy storage power station, characterized in that, The new energy storage power station includes: First energy storage converter PCS1, second energy storage converter PCS2, first DC combiner cabinet, second DC combiner cabinet, first energy storage battery stack, and second energy storage battery stack; The first energy storage converter PCS1 is connected to the first energy storage battery stack via the first DC combiner cabinet, and the second energy storage converter PCS2 is connected to the second energy storage battery stack via the second DC combiner cabinet. The first energy storage converter PCS1 is also connected to the second DC combiner cabinet, and the second energy storage converter PCS2 is also connected to the first DC combiner cabinet.

2. The new energy storage power station according to claim 1, characterized in that: The first DC combiner cabinet of the new energy storage power station includes a first display and control unit (BAU1), a first electric switch (K11), and a second electric switch (K12).

3. The new energy storage power station according to claim 2, characterized in that: The second DC combiner cabinet of the new energy storage power station includes a second display and control unit (BAU2), a third electric switch (K21), and a fourth electric switch (K22).

4. The new energy storage power station according to claim 3, characterized in that: The first energy storage converter PCS1 is connected to the first energy storage battery stack via the first electric switch K11 of the first DC combiner cabinet, and the first energy storage converter PCS1 is connected to the second energy storage battery stack via the second electric switch K12 of the first DC combiner cabinet. The second energy storage converter PCS2 is connected to the second energy storage battery stack via the third electric switch K21 of the second DC combiner cabinet, and the second energy storage converter PCS2 is connected to the second energy storage battery stack via the fourth electric switch K22 of the second DC combiner cabinet.

5. The new energy storage power station according to claim 4, characterized in that: The new energy storage power station also includes an energy management unit (EMS), which is communicatively connected to the first energy storage converter (PCS1) and the second energy storage converter (PCS2).

6. The new energy storage power station according to claim 5, characterized in that: The energy management unit (EMS) controls the first electric switch K11 and the second electric switch K12 through the first display and control unit (BAU1).

7. The new energy storage power station according to claim 6, characterized in that: The energy management unit (EMS) controls the third electric switch K21 and the fourth electric switch K22 through the second display and control unit (BAU2).

8. An energy storage system, characterized in that, The energy storage system includes a new energy storage power station as described in any one of claims 1 to 7.

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