An energy storage system

Abstract

The present invention relates to an energy storage system (1) with uninterruptible power supply capability (1) comprising at least one battery (5), at least one converter (3) arranged to convert direct current to alternating current and alternating current to direct current, at least one load connection point (7) suitable for connecting at least one load, at least one grid connection point (8) suitable for connecting to the grid, at least one secondary energy source connection point (9) suitable for connecting to secondary energy sources (10) and; at least one switching unit located at the input and / or output of the battery (5), the grid connection point (8) and the secondary energy source connection point (9) and suitable for controlling the energy input and / or output to these units; at least an energy management system (2) that is arranged to perform the functions of instantaneous monitoring of the specified units, classifying the loads connected to the load connection point (7), determining which loads will be fed and how in line with the classification made, and activating the relevant switching units accordingly.

Description

[0001] AN ENERGY STORAGE SYSTEM

[0002] Technical Field

[0003] The present invention relates to an energy storage system comprising a continuous power supply feature.

[0004] Background

[0005] It is predicted that the capacity of energy production based on renewable energy sources will increase significantly throughout the world, and it is aimed to reduce the energy production based on fossil fuels very quickly. With the reduction of available capacity, energy storage systems should be widespread for both supply security and frequency management. The use of Energy Storage Systems with renewable energy plants also allows production resources to spread faster. With the integration of Energy Storage Systems, it is possible to increase efficiency by using different energy sources together; thus, grid continuity is ensured. For example, while an industrial facility with solar energy production cannot produce in cases where the grid is interrupted, the continuity of industrial production can be ensured with the use of an energy storage system (since energy storage systems have the ability to create a grid). Micro grids created depending on the mains can continue to consume without interruption in case of grid interruptions or changes in demand.

[0006] When existing energy storage systems are disconnected from the grid, they need relatively long periods of time, which can take a minute in some cases, to create a new micro grid and keep the subsystems they are connected to in operation. The specified times can be problematic for some critical loads. For this reason, existing energy storage systems are not suitable to serve as an uninterruptible power supply.

[0007] Therefore, there is a need for an energy storage system that can perform the uninterrupted power supply function to ensure the integration of renewable energy sources and the improvement of energy quality, while at the same time ensuring that critical loads can be fed smoothly. Brief Description of the Invention

[0008] The present invention provides an energy storage system with an uninterruptible power supply feature for eliminating the aforementioned disadvantages. The said system comprises at least one battery; at least one converter arranged to convert direct current to alternating current and alternating current to direct current; at least one load connection point suitable for connecting at least one load; at least one grid connection point suitable for connecting to the grid; at least one secondary energy source connection point suitable for connecting to the secondary energy source(s); and at least one switching unit located at the input and / or output of the battery, grid connection point and secondary energy source connection point and suitable for controlling the energy input and / or output to these units; further comprises at least an energy management system that is arranged to perform the following functions: instantaneous monitoring of said battery, converter, load connection point, grid connection point, and secondary energy source connection point, classification of loads connected to the load connection point in line with the classification, determining which load source will be supplied from which power source in a way that will ensure the uninterrupted supply of the loads determined as critical load, activation of the respective switching units,

[0009] The energy management system instantly monitors all equipment, secondary (distributed) energy sources and loads in the energy storage system and ensures that all of them can operate simultaneously, whether the grid is interrupted or not. Thanks to the battery / battery groups, energy is stored at the desired time and is used when the whole system is activated at the time of interruption.

[0010] Ob ject of the Invention

[0011] The object of the present invention is to provide an energy storage system.

[0012] Another object of the present invention is to provide an energy storage system with an uninterruptible power supply feature. Another object of the present invention is to provide an energy storage system that enables the classification of the supplied loads and the uninterrupted supply of the critically determined loads.

[0013] Another object of the present invention is to provide an energy storage system that enables the creation of a micro grid from distributed energy resources and the inclusion of such resources in the supply.

[0014] Descriptions of the Figures

[0015] Exemplary embodiments of the energy storage system developed with the present invention are shown in the attached figures and among these figures;

[0016] Figure 1 is a block diagram of an exemplary embodiment of the developed energy storage system.

[0017] The parts in the figures are individually numbered and their corresponding numbers are given below:

[0018] Energy Storage System (1)

[0019] Energy Management System (2)

[0020] Converter (3)

[0021] Fire Extinguishing System (4)

[0022] Battery (5)

[0023] Cooling System (6)

[0024] Load Connection Point (7)

[0025] Grid Connection Point (8)

[0026] Secondary Energy Source Connection Point (9)

[0027] Secondary Energy Source (10)

[0028] Critical Load (11)

[0029] Non-critical Load (12)

[0030] Micro Grid (13) Description of the Invention

[0031] The energy storage system (1) developed by the present invention and comprising the uninterruptible power supply feature, an exemplary view of which is given in Figure 1, comprises at least one battery (5), at least one converter (3) arranged to convert direct current to alternating current and alternating current to direct current, at least one load connection point (7) suitable for connecting at least one load (11, 12), at least one grid connection point

[0032] (8) suitable for connecting to the grid, at least one secondary energy source connection point

[0033] (9) suitable for connecting to the secondary energy source(s) (10) and; and at least one switching unit located at the input and / or output of the battery (5), grid connection point (8) and secondary energy source connection point (9) and suitable for controlling the energy input and / or output to these units; further comprises at least an energy management system (2) that is arranged to perform the following functions: instant monitoring of said battery (5), converter (3), load connection point (7), grid connection point (8) and secondary energy source connection point (9), classification of loads connected to the load connection point (7), in line with the classification made, determining which load source will be supplied from which power source (battery (5) / grid connection point (8) / secondary energy source connection point (9)) in a way that will ensure uninterrupted supply of the loads (11, 12) determined as critical load (11), activation of the respective switching units,

[0034] Said energy management system (2) is arranged to ensure that all elements of the energy storage system (1) operate simultaneously, with or without grid interruption. The loads (11, 12) connected to the energy storage system (1) are classified by the energy management system (2) and it is determined by which energy source(s) and how these loads will be fed in line with said classification. The energy management system (2) ensures that the relevant loads are fed from the relevant source in this direction. The loads are divided into at least two classes as critical loads (11) and non-critical loads (12) in a preferred application of the invention; it is also possible that the loads are divided into more than two classes and the energy management system (2) provides the supply of the loads belonging to the classification specified with the criteria suitable for the new classification to be created. The energy management system (2) is preferably a computer-based system, comprising software adapted to perform the specified functions. Said secondary energy sources are energy sources that provide distributed energy production and preferably include at least one of the energy sources such as solar power plant, wind power plant, cogeneration system and / or generator. By instantly monitoring the relevant units of the energy management system (2) and controlling said switching units, it is ensured that the energy storage system (1) functions as an uninterrupted power supply for critical loads (11); and in cases where the system is connected to the grid, it is ensured that it can both receive energy from the grid and supply energy to the grid by working with the grid. In addition, it is ensured that non-critical loads (12) and secondary energy sources (10) such as solar energy and cogeneration systems can be operated within the micro grid (13) before the grid connection. Said switching units may comprise at least one unit such as a breaker, separator, and / or the like.

[0035] In a preferred embodiment of the invention, said battery (5) comprises at least one battery group. With the specified battery groups, it is ensured that the energy is stored for the desired process and the necessary loads are supplied during an interruption. Said process takes place as follows; the energy management system (2), which monitors all components instantly, enables the battery to be activated so that it is full for as long as necessary; and if it detects a power failure, it allows the battery to supply the desired loads. Said process is carried out by the energy management system (2) controlling the relevant switching units.

[0036] In a preferred embodiment of the invention, said energy storage system (1) comprises at least one fire extinguishing system (4) that is associated with said energy management system (2) and works in conjunction with the energy management system (2). In the mentioned application, the fire extinguishing system (4) is activated by the energy management system (2), which instantly monitors all components related to the energy storage system (1), if necessary.

[0037] In a preferred embodiment of the invention, said energy storage system (1) comprises at least one cooling system (6) associated with said energy management system (2) and operating in conjunction with said energy management system (2). The energy storage system (1) needs to be conditioned in the right conditions for its long-term performance. Accordingly , the energy management system (2) ensures that the cooling system is activated when necessary.

[0038] The energy storage system (1) of the invention preferably comprises at least one housing (not shown in Figures), which may be, for example, a container, arranged to securely hold the components of the energy storage system (1) together.

[0039] The example applications of the invention are given below in order to sample the processes performed by the energy management system (2) of how the invention functions in different power failure and power supply situations.

[0040] When the system has a secondary energy source(s) ( 10), and the grid is energized:

[0041] In the said embodiment, the system is connected to the grid as an energy source, as well as secondary energy sources (10). Said secondary energy sources (10) may include energy sources such as solar power plant, wind power plant, cogeneration system and / or generator. In said embodiment, the loads (11, 12) connected to the energy storage system (1) are classified and the energy management system (2) determines which energy source(s) will feed these loads in line with said classification. The operations performed are as follows:

[0042] The critical loads (11) are fed through the energy storage system (1) by protecting from all the negativities that may occur in the grid.

[0043] The energy demanded by all critical or non-critical loads is provided from the preferred one in secondary energy sources (10) such as solar, then cogeneration or generator. If these resources are insufficient, the difference is covered from the grid. If desired, overloads can be prevented by meeting the peak loads by the energy storage system (1) (by the battery (5)).

[0044] Preferably, the grid may be energized until the battery (5) reaches a critical level (said critical level may be, for example, a lowest energy level determined according to the requirements / classification of the loads (11, 12) connected to the energy storage system (1) or according to the characteristics of the battery (5)) and / or the grid may be energized until the battery (5) is full. In this way, it is possible to reduce the energy cost or increase the income based on energy sales.

[0045] In the event of a grid interruption while the system has secondary power source(s) (10):

[0046] In the event of an interruption in the grid during the above-mentioned application, the operations performed are as follows:

[0047] The whole system is immediately disconnected from the grid. The process of disconnecting the system from the grid is preferably provided by at least one disconnection unit (e.g., an AC disconnector in the grid connection, etc.), which is controlled by the energy management system (2).

[0048] The critical loads (11) continue to be fed through the battery (5) without interruption.

[0049] Preferably, a new micro grid (13) having the same characteristics as the grid is formed over the energy storage system (1) in such a way that the non-critical loads (12) can be supplied within 100 milliseconds.

[0050] The created micro grid (13) enables the secondary (distributed) energy sources

[0051] (10) to continue production without interruption.

[0052] The energy demanded by all critical or non-critical loads (11, 12) is provided primarily from the preferred one in secondary energy sources (10) such as solar, then cogeneration or generator. If these secondary energy sources (10) are insufficient, the difference is covered by the battery (5). The production load balance here is provided by the battery (5) until the battery (5) reaches the critical charge level.

[0053] In cases where the secondary energy sources (10) within the system cannot generate energy, the non-critical loads (12) are not supplied, but the critical loads

[0054] (11) continue to be supplied from the battery (5).

[0055] In the event that there is no secondary energy source (10) in the system and there is energy in the grid:

[0056] In this application, the system is only connected to the grid.

[0057] The critical loads (11) are fed through the energy storage system (1) by protecting from all the negativities that may occur in the grid.

[0058] The energy demanded by all critical or non-critical loads (11, 12) is supplied from the grid. If desired, overloads are prevented by meeting the peak loads by the energy storage system (for example, the battery (5)).

[0059] If preferred, the mains may be energized until the battery (5) reaches the critical level or the grid may be energized until the battery (5) is full. In this way, it is possible to reduce the energy cost or increase the income based on energy sales.

[0060] In the event that there is no secondary energy source (10) in the system and there is an interruption in the grid:

[0061] In the event of an interruption in the grid during the above-mentioned application, the operations performed are as follows:

[0062] The entire system (1) is immediately disconnected from the grid.

[0063] The critical loads (11) continue to be fed through the battery (5) without interruption.

[0064] Provided that it is desired, and the power of the system is sufficient, non-critical loads (12) are fed through the energy storage system (from the battery (5)) within 100 milliseconds.

[0065] The specified operations are carried out when the energy management system (2) activates the relevant switching units. The energy storage system (1) of the invention performs the task of uninterruptible power supply on the load side; It ensures that secondary energy sources (10) such as non-critical loads (12) and solar energy and cogeneration systems can be operated in the micro grid (13) before the grid connection. When there is any mains interruption, critical loads (11) continue to be supplied uninterruptedly. At this time, it is ensured that the non- critical loads (12) can be fed with an interruption time of less than 100 milliseconds. As can be seen in Figure 1, the energy storage system (1) is capable of monitoring and managing secondary energy sources (10) (distributed energy sources) and loads (11, 12) together. In addition, it provides the integration of renewable energy sources and improvement of energy quality

Claims

CLAIMS An energy storage system (1) comprising at least one battery (5), at least one converter (3) arranged to convert direct current to alternating current and alternating current to direct current, at least one load connection point (7) suitable for connecting at least one load, at least one grid connection point (8) suitable for connecting to the grid, at least one secondary energy source connection point (9) suitable for connecting to secondary energy sources (10) and; at least one switching unit located at the input and / or output of the battery (5), the grid connection point (8) and the secondary energy source connection point (9) and suitable for controlling the energy input and / or output to these units, characterized in that it comprises at least an energy management system (2) that is arranged to perform the following functions: instant monitoring of said battery (5), converter (3), load connection point (7), grid connection point (8) and secondary energy source connection point (9), classification of loads connected to the load connection point (7), in line with the classification, determining which of the battery (5), mains and / or secondary energy sources (10) will be fed to the loads (11, 12) in a way to ensure uninterrupted feeding of the loads determined as critical load (11) and in this direction, activating the respective switching units located at the input and / or output of the battery (5), the grid connection point (8) and / or the secondary energy source connection point (9), An energy storage system (1) according to Claim 1, characterized in that it comprises at least one cooling system (6) that is connected to said energy management system (2) and that operates in conjunction with the energy management system (2). An energy storage system (1) according to any one of the preceding claims, characterized in that it comprises at least one fire extinguishing system (4) associated with said energy management system (2) and operating in conjunction with the energy management system (2). An energy storage system (1) according to any one of the preceding claims,characterized in that said energy management system (2) is arranged in accordance with the function of controlling the relevant switching units so as to ensure that all loads (11, 12) are supplied from secondary energy sources (10) while there is at least one secondary energy source (10) in the system and that the difference is met from the grid in case the secondary energy sources (10) are insufficient.

5. An energy storage system (1) according to any one of the preceding claims, characterized in that said energy management system (2) is arranged to perform the function of controlling the relevant switching units so as to ensure that, when the grid is energized and there is at least one secondary energy source (10) in the system, the battery (5) is energized to the grid until a critical level is reached and / or energy is taken from the grid until the battery (5) is full.

6. An energy storage system (1) according to any one of the preceding claims, characterized in that said energy management system (2) is arranged to perform the function of controlling the respective switching units such that the entire system is immediately disconnected from the grid and the critical loads (11) continue to be supplied uninterruptedly through the battery (5) in the event of grid interruption when there is at least one secondary energy source (10) in the system.

7. An energy storage system (1) according to any one of the preceding claims, characterized in that said energy management system (2) is arranged to perform the function of controlling the respective switching units to form a new micro grid (13) on the energy storage system (1) in case of grid interruption while there is at least one secondary energy source (10) in the system.

8. An energy storage system (1) according to any one of the preceding claims, characterized in that said energy management system (2) is arranged in accordance with the function of controlling the relevant switching units in order to ensure that the energy demanded by the loads (11, 12) is provided from the secondary energy sources (10) in case of grid interruption when there is at least one secondary energy source (10) in the system; in case the secondary energy sources (10) are insufficient, the difference is met from the battery (5).

9. An energy storage system (1) according to any one of the preceding claims,characterized in that said energy management system (2) is arranged to perform the function of controlling the relevant switching units in such a way that the critical loads (11) continue to be supplied from the battery (5) and the non-critical loads (12) cannot be supplied in the event that the grid is interrupted while there is at least one secondary energy source (10) in the system and the secondary energy sources (10) cannot produce energy.

10. An energy storage system (1) according to any one of the preceding claims, characterized in that said energy management system (2) is arranged in accordance with the function of controlling the relevant switching units in such a way as to ensure that all loads (11, 12) are supplied from the grid in case there is no secondary energy source (10) in the system and there is energy in the grid.

11. An energy storage system (1) according to any one of the preceding claims, characterized in that said energy management system (2) is arranged in accordance with the function of controlling the relevant switching units so as to ensure that the peak loads are met from the battery (5) in the event that there is no secondary energy source (10) in the system and there is energy in the grid.

12. An energy storage system (1) according to any one of the preceding claims, characterized in that said energy management system (2) is arranged to perform the function of controlling the relevant switching units in such a way that the entire system is immediately disconnected from the grid and the critical loads (11) continue to be supplied uninterruptedly through the battery (5) in case of interruption in the grid in the absence of a secondary energy source (10) in the system.

13. An energy storage system (1) according to claim 12, characterized in that said energy management system (2) is arranged to perform the function of controlling the respective switching units such that non-critical loads (12) are supplied from the battery (5) within 100 milliseconds in the absence of a secondary energy source in the system and in the event of an interruption in the grid.

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