Cascaded valve hall type energy storage valve hall and application thereof

Abstract

The invention provides a cascade valve hall type energy storage valve hall and application thereof, and belongs to the technical field of energy storage. The energy storage bridge arm comprises a plurality of energy storage bridge arm units which are sequentially arranged in parallel; the firewall is used for dividing the energy storage valve hall into a plurality of battery chambers; the liquid cooling system is used for circularly exchanging heat and taking away heat generated during operation of the energy storage valve hall; the heating and ventilation system is used for controlling the temperature and humidity in the energy storage valve hall and ensuring the operation environment of the energy storage valve hall; the energy storage bridge arm unit comprises a plurality of battery chambers which are arranged in parallel and connected end to end, and a plurality of energy storage valve towers are arranged in the battery chambers. Through the energy storage bridge arm units which are sequentially arranged in parallel, the energy storage bridge arm has the advantages of being larger in capacity and smaller in occupied area. The energy storage valve hall has a higher level of voltage, can meet the grid-connected requirement of a 110KV high-voltage power grid energy storage power station, saves a direct-current boosting transformer, greatly reduces the cost of an energy storage system, and has a better supporting capability for a power grid above 110kV.

Description

Technical Field

[0001] The present invention relates to the field of energy storage technology, and in particular to a cascade valve hall type energy storage valve hall and its application in the field of high-pressure and ultra-high-pressure cascade energy storage. Background Art

[0002] The maximum power of conventional 35kV high-voltage direct-mounted energy storage is currently 25MW, which is only 1 / 40 of the capacity of a 1000MW conventional thermal power generator. When an event occurs that endangers the safety and stability of the power grid, many 35kV high-voltage direct-mounted energy storage units are difficult to support the safety and stability of the power grid due to their small single-unit capacity, low access voltage level, and long electrical distance from the main grid.

[0003] The unit power of 110kV and above high-voltage cascade valve halls is close to or even exceeds that of million-kW thermal power units. A high-voltage cascade valve hall energy storage valve hall design method has huge unit capacity, high safety, and high efficiency, ensuring the strong grid support capability of 110kV high-voltage direct-mounted flexible energy storage. Summary of the invention

[0004] In view of this, in order to solve the technical problem that the conventional high-voltage direct-mounted energy storage capacity in the prior art is small, and it is difficult to support the safety and stability of the power grid in the event of an incident that endangers the safety and stability of the power grid; and the conventional 35KV high-voltage direct-mounted energy storage power is relatively small, less than 1 / 40 of the capacity of a conventional thermal power generator set. In the first aspect, the present invention provides a cascade valve hall type energy storage valve hall, which has the advantages of larger capacity and smaller footprint through a number of energy storage bridge arm units arranged in parallel. The energy storage valve hall has a higher level of voltage, which can meet the grid connection requirements of 110KV high-voltage power grid energy storage power stations, eliminate the DC step-up transformer, greatly reduce the cost of the energy storage system, and have better support capabilities for power grids above 110kV.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A cascade valve hall type energy storage valve hall, comprising:

[0007] A plurality of energy storage bridge arm units arranged in parallel in sequence;

[0008] A firewall, used to divide the energy storage valve hall into a number of battery rooms;

[0009] A liquid cooling system, used for circulating heat exchange, to remove the heat generated during the operation of the energy storage valve hall;

[0010] A heating and ventilation system, used to control the temperature and humidity inside the energy storage valve hall to ensure the operating environment of the energy storage valve hall;

[0011] The energy storage bridge arm unit comprises a plurality of battery chambers arranged in parallel and connected end to end, wherein a plurality of energy storage valve towers are arranged in the battery chambers.

[0012] Preferably, it also includes:

[0013] A fire protection system is used to prevent fire in the energy storage valve hall.

[0014] Preferably, one end of the fire-fighting system is connected to the fire-fighting pipeline of the energy storage valve tower, and the other end is connected to external fire-fighting equipment.

[0015] Preferably, the energy storage bridge arm units are 6 groups, and each group of the energy storage bridge arm units has 6 battery chambers.

[0016] Preferably, the firewall is enclosed by an outer firewall and an inner partition firewall, dividing the energy storage valve hall into thirty-six areas, each of which corresponds to one of the battery chambers.

[0017] Preferably, the liquid cooling system comprises:

[0018] A first liquid cooling pipeline, one end of which is connected to the external heat exchange device, and the other end of which is connected to the liquid cooling pipeline of the energy storage valve tower;

[0019] The second liquid cooling pipeline is connected to the external heat exchange device at one end and connected to the liquid cooling pipeline of the energy storage valve tower at the other end.

[0020] Preferably, the HVAC system supplies air to the energy storage valve hall through an air supply duct to control the entire energy storage valve hall to maintain a certain temperature range and humidity range.

[0021] Preferably, four groups of the energy storage valve towers are arranged in each of the battery chambers.

[0022] In a second aspect, the present invention also provides the application of the above-mentioned cascade valve hall type energy storage valve hall in the field of high-pressure and ultra-high-pressure cascade energy storage.

[0023] The present invention provides a cascade valve hall type energy storage valve hall, which has the advantages of larger capacity and smaller footprint through a number of energy storage bridge arm units arranged in parallel. The energy storage valve hall has a higher level of voltage, which can meet the grid connection requirements of 110KV high-voltage power grid energy storage power station, eliminate the need for DC step-up transformers, greatly reduce the cost of energy storage systems, and have better support capabilities for power grids above 110kV. Compared with the prior art, it has the following beneficial effects:

[0024] Larger capacity

[0025] Large single-unit capacity: By arranging multiple energy storage bridge arm units in parallel, the single-unit capacity can be significantly increased to meet large-scale energy storage needs.

[0026] Suitable for large-scale projects: It can meet the needs of large-scale power grid peak regulation, emergency standby, new energy consumption and other scenarios.

[0027] Smaller footprint

[0028] Space utilization: Through parallel arrangement and cascade connection, full use of space can be made and the floor space can be reduced.

[0029] Suitable for space-constrained occasions: Suitable for space-constrained occasions such as city centers and industrial areas.

[0030] Lower costs

[0031] Eliminate the DC step-up transformer: Through cascade connection, the system can directly output high voltage, eliminating the DC step-up transformer and reducing system costs.

[0032] Low maintenance cost: The modular design makes maintenance more convenient. A module can be replaced or repaired individually without affecting the operation of the overall system.

[0033] High voltage access: The system adopts 110kV and above high voltage cascade technology, which can be directly connected to the main grid to reduce transmission loss and control difficulty.

[0034] Through the arrangement of the battery room, which is mainly composed of energy storage valve towers in parallel, the single-unit capacity of the energy storage valve hall is huge, which can be close to or even exceed that of a million-kW thermal power unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a structural layout diagram of the energy storage valve hall of the present invention;

[0036] Figure 2 This is a structural layout diagram of the battery chamber of the present invention;

[0037] Figure 3 This is a layout diagram of the pipelines of the energy storage valve hall liquid cooling system and the HVAC system;

[0038] Figure 4 This is a pipeline layout diagram of the energy storage valve hall fire protection system of the present invention;

[0039] Figure 5 For the present invention Figure 3 Enlarged view of point A in the middle;

[0040] Figure 6 For the present invention Figure 3 Enlarged view of point B in the middle;

[0041] Figure 7 For the present invention Figure 4 Enlarged view of point C in the middle;

[0042] In the figure, 1. firewall; 11. outer firewall; 12. partition firewall; 121. vertical fireproof partition wall; 1211. inspection door; 122. horizontal fireproof partition wall; 2. energy storage valve tower unit; 21. first energy storage valve tower; 22. second energy storage valve tower; 23. third energy storage valve tower; 24. fourth energy storage valve tower; 3. energy storage bridge arm unit; 4. battery room; 5. liquid cooling system; 51. first liquid cooling pipeline; 511. first liquid cooling main pipeline; 512. first liquid cooling branch pipeline; 52. second liquid cooling pipeline; 521. second liquid cooling main pipeline; 522. second liquid cooling branch pipeline; 53. heat exchange equipment; 6. HVAC system; 61. first HVAC system; 611. first air supply duct; 62. second HVAC system; 621. second air supply duct; 7. fire protection system; 8. fire protection equipment. DETAILED DESCRIPTION

[0043] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making creative work are within the scope of protection of the present invention.

[0044] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0045] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "mounted / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] like Figure 1-7 As shown, the present invention provides a cascade valve hall type energy storage valve hall, comprising:

[0047] A plurality of energy storage bridge arm units 3 are arranged in parallel in sequence, and the plurality of energy storage bridge arm units 3 form a high-capacity energy storage valve hall.

[0048] The fire wall 1 is used to divide the energy storage valve hall into a plurality of battery rooms 4, thereby improving the safety of the system and preventing the spread of fire.

[0049] The liquid cooling system 5 is used for circulating heat exchange to take away the heat generated when the energy storage valve hall is in operation, thereby ensuring that the system operates stably at high temperatures.

[0050] The HVAC system 6 is used to control the temperature and humidity inside the energy storage valve hall, ensure the operating environment of the energy storage valve hall, and improve the reliability and life of the system.

[0051] The energy storage bridge arm unit 3 includes a plurality of battery chambers 4 arranged in parallel and connected end to end, wherein a plurality of energy storage valve towers are arranged in the battery chambers 4 .

[0052] The above-mentioned cascade valve hall type energy storage valve hall provided by the present invention, since several energy storage bridge arm units 3 form a high-capacity energy storage valve hall, the capacity of a single machine can be significantly improved to meet the needs of large-scale energy storage. It can meet the needs of large-scale power grid peak regulation, emergency standby, new energy consumption and other scenarios. Through parallel arrangement and cascade connection, full use is made of space and the floor space is reduced. It is particularly suitable for occasions with limited space such as urban centers and industrial areas. The efficient liquid cooling system 5 can promptly take away the heat generated during operation to ensure that the system operates stably at high temperatures. The HVAC system can accurately control the temperature and humidity inside the energy storage valve hall to ensure that the system operates in the best environment and improve the reliability and life of the system. The firewall divides the energy storage valve hall into several battery chambers 4 to prevent the spread of fire and improve the safety of the system. Once a battery chamber 4 fails, it can be quickly isolated to prevent the spread of the fault.

[0053] Temperature sensors and temperature control equipment can be installed in the HVAC system 6 to ensure that the temperature inside the energy storage valve hall is within a suitable range. Humidity sensors and dehumidification equipment can also be installed to ensure that the humidity inside the energy storage valve hall is within a suitable range.

[0054] The present invention also includes:

[0055] The fire protection system 7 is used to prevent fire in the energy storage valve hall.

[0056] In the present invention, one end of the fire fighting system 7 is connected to the fire fighting pipeline of the energy storage valve tower, and the other end is connected to the external fire fighting equipment 8. Specifically, it can be:

[0057] The fire protection system 7 pipeline of the fire protection system 7 is arranged at the top of the energy storage valve tower, one end of which is connected to the fire protection pipeline on the energy storage valve tower, and the other end is connected to the external fire protection equipment 8. Its function is that when the energy storage valve tower has thermal runaway, the external fire protection equipment 8 is started to release the fire extinguishing agent. The fire extinguishing agent passes through the fire protection system 7 pipeline and enters the battery module in the energy storage valve tower to suppress the secondary reignition of the fire, thereby further improving the safety of the system.

[0058] In the present invention, the energy storage bridge arm units 3 are 6 groups, and each group of the energy storage bridge arm units 3 has 6 battery chambers 4, corresponding to the following thirty-six areas, which can make full use of space and reduce the floor space.

[0059] In the present invention, the fire wall 1 is enclosed by an outer fire wall 11 and an inner partition fire wall 12, dividing the energy storage valve hall into thirty-six areas, each of which corresponds to one of the battery chambers 4. Specifically:

[0060] The firewall 1 is composed of an outer firewall 11 and an internal partition firewall 12. The interior of the energy storage valve hall is divided into areas of equal size. Vertical fireproof walls 121 are arranged in equal proportion along the width of the energy storage valve hall. Optionally, five vertical firewalls are arranged to divide the energy storage valve hall into six areas. The energy storage valve tower units 2 in the area (several energy storage valve towers in each battery room 4 constitute an energy storage valve tower unit 2) are connected in parallel to form an energy storage bridge arm unit 3; optionally, an inspection door 1211 is provided on the vertical fireproof wall 121 to facilitate the installation, inspection, and maintenance of the energy storage valve tower unit 2.

[0061] Furthermore, transverse fireproof partition walls 122 are arranged in equal proportion along the depth direction of the energy storage valve hall. Optionally, five transverse fireproof partition walls 122 are arranged to further divide the energy storage valve hall into thirty-six areas. Four groups of energy storage valve towers are placed in the fireproof partition walls of each area, thereby forming a single battery room 4 (such as Figure 2 As shown). Optionally, in the present invention, the fireproof partition walls of adjacent battery rooms 4 share a fire wall, which can effectively reduce the floor space of the energy storage valve hall.

[0062] In the present invention, the liquid cooling system 5 comprises:

[0063] A first liquid cooling pipeline 51, one end of which is connected to the external heat exchange device 53, and the other end of which is connected to the liquid cooling pipeline of the energy storage valve tower;

[0064] One end of the second liquid cooling pipeline 52 is connected to the external heat exchange device 53, and the other end is connected to the liquid cooling pipeline of the energy storage valve tower.

[0065] Specifically:

[0066] like Figure 3 and Figure 5As shown, the energy storage valve hall is equipped with a liquid cooling system 5. Since the coolant in the cold plate inside the energy storage battery module requires a certain flow rate, a branch is formed by changing the diameter of the pipeline to control the flow rate; the coolant in the pipelines (branches) of several valve towers finally converges to the main pipeline to connect to the peripheral equipment. For this reason, the liquid cooling system 5 of the present invention is divided into a first liquid cooling pipeline 51 and a second liquid cooling pipeline 52. The first liquid cooling pipeline 51 is constituted as a first liquid cooling main pipeline 511, one end of which is connected to the external heat exchange equipment 53, and the other end is connected to the first liquid cooling branch pipeline 512. Further, the first liquid cooling main pipeline 511 is arranged on the left side of the firewall on the right side of the energy storage valve hall, and is installed on the ground along the depth direction of the energy storage valve hall through standard pipeline fixtures. The first liquid cooling branch pipeline 512 is arranged at the bottom of the front of the energy storage valve tower, and is also installed on the ground through standard pipeline fixtures. Further, the first liquid cooling branch pipeline 512 is connected to the liquid cooling pipeline of the energy storage valve tower, thereby forming the first liquid cooling pipeline 51. Similarly, a second liquid cooling pipeline 52 is arranged, and the second liquid cooling pipeline 52 is constituted as a second liquid cooling main pipeline 521, one end of which is connected to the external heat exchange device 53, and the other end is connected to the second liquid cooling branch pipeline 522. Further, the second liquid cooling main pipeline 521 is arranged on the left side of the firewall on the right side of the energy storage valve hall, and is installed on the ground along the depth direction of the energy storage valve hall through standard pipeline fixings. The branch of the second liquid cooling pipeline 52 is arranged at the bottom of the front of the energy storage valve tower, and is also installed on the ground through standard pipeline fixings. Further, the branch of the second liquid cooling pipeline 52 is connected to the liquid cooling pipeline of the energy storage valve tower, thereby forming a first system pipeline.

[0067] In the present invention, the HVAC system supplies air to the energy storage valve hall through the air supply duct to control the entire energy storage valve hall to maintain a certain temperature range and humidity range. Specifically:

[0068] like Figure 3 , 6 As shown, the HVAC system 6 includes the first HVAC system 61 and the second HVAC system 62. The first air supply duct 611 and the second air supply duct 621 in the HVAC system are arranged along the bottom of the energy storage valve tower to supply air to the energy storage valve tower to control the entire energy storage valve hall to maintain a certain temperature range and humidity range. The first HVAC system 61 corresponds to the first air supply duct 611. The second HVAC system 62 corresponds to the second air supply duct 621. It is two systems, and the reason why it is branched into two systems is the same as the reason why the liquid cooling system 5 is branched into two systems.

[0069] In the present invention, four groups of energy storage valve towers are arranged in each battery chamber 4. Figure 2As shown, there are the first energy storage valve tower 21, the second energy storage valve tower 22, the third energy storage valve tower 23 and the fourth energy storage valve tower 24, respectively, and these four energy storage valve towers constitute an energy storage valve tower unit 2. There is a certain distance between the first energy storage valve tower 21 and the second energy storage valve tower 22, so as to facilitate installation, inspection and maintenance of the energy storage valve towers; similarly, there is a certain distance between the third energy storage valve tower 23 and the fourth energy storage valve tower 24, and optionally, the second energy storage valve tower 22 and the third energy storage valve tower 23 only need to reserve a distance that meets the safety regulations, which can effectively reduce the floor area of ​​the battery room 4, thereby indirectly reducing the floor area of ​​the energy storage valve hall.

[0070] In the second aspect, the present invention also provides the application of the above-mentioned cascade valve hall type energy storage valve hall in the field of high-pressure and ultra-high-pressure cascade energy storage. In the field of high pressure and ultra-high pressure, the safety and reliability of the energy storage system are of great importance. The design of the cascade valve hall type energy storage valve hall, through a modular approach, makes the energy storage valve hall highly flexible and scalable. This design can meet the energy storage needs of different scales and is convenient for maintenance and expansion.

[0071] The working principle of the present invention is as follows:

[0072] The energy storage valve hall is used in the field of high-voltage cascade energy storage, as a new typical configuration of large energy storage power stations. According to the "GB51048 Design Standard for Electrochemical Energy Storage Power Stations", the layout of lithium-ion batteries and sodium-ion battery equipment should be arranged in zones. The rated energy of a single battery room 4 in a single-story energy storage plant should not exceed 35MWh, and the building area should not exceed 500㎡. The energy storage valve hall of the present invention is composed of 36 battery rooms 4 arranged in a matrix (i.e., 6 rows and 6 columns), and fireproof walls are provided between each battery room 4, dividing the energy storage valve hall into 36 equal partitions, each partition covering an area of ​​148.6㎡, and each partition is arranged with 4 groups of energy storage valve towers, so that the capacity of a single battery room 4 reaches 30.72MWh, and the energy density of the battery room 4 is significantly improved. The capacity of the entire energy storage valve hall reaches 1105.92MWh, covering an area of ​​5800㎡. A single energy storage valve hall can be used as an independent battery plant, and two energy storage valve halls can be configured in parallel as a large energy storage power station that can be connected to a 110kV power grid.

[0073] On the other hand, considering the large heat generated by the energy storage valve hall, in order to control the energy storage valve tower to maintain a certain temperature and humidity range, the present invention simultaneously provides the layout of the liquid cooling system 5 and the HVAC system to dissipate heat from the energy storage valve hall and improve the service life of the energy storage valve hall. The present invention also provides the layout of the fire protection system 7 to prevent the energy storage valve tower from thermal runaway. Furthermore, when the energy storage valve tower inside the energy storage valve hall thermal runaway occurs, the fire protection system 7 is activated to release the fire extinguishing agent, which passes through the fire protection system 7 pipeline and enters the battery module in the energy storage valve tower to extinguish the fire. The fire extinguishing agent can suppress the secondary reignition of the fire and minimize the damage caused by the fire to personnel, equipment and the environment.

[0074] The above are only preferred specific implementations of the present invention; however, the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and improved concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A cascade valve hall type energy storage valve hall, characterized in that: include: A plurality of energy storage bridge arm units arranged in parallel; A firewall, used to divide the energy storage valve hall into a number of battery rooms; A liquid cooling system, used for circulating heat exchange, to remove the heat generated during the operation of the energy storage valve hall; A heating and ventilation system, used to control the temperature and humidity inside the energy storage valve hall to ensure the operating environment of the energy storage valve hall; The energy storage bridge arm unit comprises a plurality of battery chambers arranged in parallel and connected end to end, wherein a plurality of energy storage valve towers are arranged in the battery chambers.

2. The cascade valve hall type energy storage valve hall according to claim 1, characterized in that: Also includes: A fire protection system is used to prevent fire in the energy storage valve hall.

3. The cascade valve hall type energy storage valve hall according to claim 2, characterized in that: One end of the fire protection system is connected to the fire protection pipeline of the energy storage valve tower, and the other end is connected to external fire protection equipment.

4. The cascade valve hall type energy storage valve hall according to claim 1, characterized in that: There are 6 groups of energy storage bridge arm units, and each group of energy storage bridge arm units has 6 battery chambers.

5. The cascade valve hall type energy storage valve hall according to claim 1, characterized in that: The firewall is formed by an outer firewall and an inner partition firewall, dividing the energy storage valve hall into thirty-six areas, each of which corresponds to a battery room.

6. The cascade valve hall type energy storage valve hall according to claim 1, characterized in that: The liquid cooling system comprises: A first liquid cooling pipeline, one end of which is connected to the external heat exchange device, and the other end of which is connected to the liquid cooling pipeline of the energy storage valve tower; The second liquid cooling pipeline is connected to the external heat exchange device at one end and connected to the liquid cooling pipeline of the energy storage valve tower at the other end.

7. The cascade valve hall type energy storage valve hall according to claim 1, characterized in that: The HVAC system supplies air to the energy storage valve hall through an air supply duct, and controls the entire energy storage valve hall to maintain a certain temperature range and humidity range.

8. A cascade valve hall type energy storage valve hall according to any one of claims 1 to 7, characterized in that: Four groups of energy storage valve towers are arranged in each battery chamber.

9. Application of a cascade valve hall type energy storage valve hall according to any one of claims 1 to 8 in the field of high-pressure and ultra-high-pressure cascade energy storage.

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