Energy storage system

Abstract

The utility model provides an energy storage system, which comprises a converting and boosting all-in-one machine and a battery cabin, and the converting and boosting all-in-one machine comprises a transformer connected with a power generation end; the first power supply line is electrically connected with the transformer; the second power supply line is electrically connected with the booster station; the first automatic change-over switch is electrically connected with the first power supply circuit and the second power supply circuit; and the first load power supply unit is electrically connected with the first automatic change-over switch, and the first load power supply unit is electrically connected with the battery compartment. According to the energy storage system, the transformer and the first power supply circuit are arranged, power is not supplied only from a booster station, power can be supplied through the power generation end, and the first automatic change-over switch is matched, so that double-circuit power supply is realized, the stability of power supply of the current transforming and boosting all-in-one machine is ensured, meanwhile, electric energy can be continuously obtained from the power generation end, and the power supply efficiency is improved. Therefore, the number of load power supplies capable of supporting power supply at the same time is large, and long-time stable power supply can be achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage, and in particular to an energy storage system. Background Art

[0002] With the development of new energy sources such as wind power generation and photovoltaic power generation, the amount of electricity connected to the grid continues to increase. During the grid connection process, the disadvantages of wind and photovoltaic power generation have gradually become apparent. Both of these power generation methods are volatile, so energy storage, converter and boost integrated cabins and energy storage battery cabins came into being.

[0003] The existing energy storage, conversion and boosting integrated cabin is usually powered by an AC power supply through a boosting power station, and some important load power supply lines are equipped with UPS (Uninterruptible Power Supply). However, since the UPS is installed in the energy storage, conversion and boosting integrated cabin, and the space inside the cabin is limited, the UPS capacity is small, the number of load power supplies that the UPS supports at the same time is limited, and long-term stable power supply cannot be achieved, resulting in poor operating stability of the existing energy storage system. Utility Model Content

[0004] The utility model aims to at least solve the problem of poor operating stability of existing energy storage systems in the prior art, and proposes an energy storage system.

[0005] In order to achieve the purpose of the utility model, an energy storage system is provided, including: a current converter and booster integrated machine and a battery compartment, the current converter and booster integrated machine is used to store the electric energy of the power generation end in the battery compartment, the current converter and booster integrated machine includes: a transformer, whose input end is connected to the power generation end; a first power supply line, electrically connected to the output end of the transformer; a second power supply line, electrically connected to the output end of the booster station; a first automatic transfer switch, having a first input end, a second input end and an output end, the first input end of the first automatic transfer switch is electrically connected to the first power supply line, and the second input end of the first automatic transfer switch is electrically connected to the second power supply line; a first load power supply unit, whose input end is electrically connected to the output end of the first automatic transfer switch, and the output end of the first load power supply unit is electrically connected to the battery compartment.

[0006] Furthermore, the integrated converter and booster also includes: a second load power supply unit, an input end of which is electrically connected to an output end of the transformer, and an output end of the second load power supply unit is electrically connected to the battery compartment.

[0007] Further, the battery compartment includes: a second automatic transfer switch having a first input end, a second input end and an output end, the first input end of the second automatic transfer switch being electrically connected to the output end of the first load power supply unit; a third load power supply unit, whose input end is electrically connected to the output end of the second automatic transfer switch; a fourth load power supply unit, whose input end is electrically connected to the output end of the second load power supply unit, and the second input end of the second automatic transfer switch is electrically connected to the output end of the fourth load power supply unit.

[0008] Furthermore, the third load power supply unit includes: a second UPS having an output end and an input end, the input end of the second UPS being electrically connected to the output end of the second automatic transfer switch; a battery compartment primary load power supply being electrically connected to the output end of the second UPS and used to power the primary load of the battery compartment.

[0009] Furthermore, the third load power supply unit also includes: a battery compartment secondary load power supply, which is electrically connected to the output end of the second automatic transfer switch and is used to supply power to the secondary load of the battery compartment.

[0010] Furthermore, the fourth load power supply unit also includes: a battery compartment tertiary load power supply, whose input end is electrically connected to the output end of the second load power supply unit, and is used to power the tertiary load of the battery compartment; a battery compartment third load power supply, whose input end is electrically connected to the output end of the second load power supply unit, and the output end of the battery compartment third load power supply is electrically connected to the second input end of the second automatic switching switch.

[0011] Furthermore, the first load power supply unit includes: a first UPS having an output end and an input end, the input end of the first UPS being electrically connected to the output end of the first automatic transfer switch; an all-in-one primary load power supply, whose input end is electrically connected to the output end of the first UPS, and is used to power the primary load of the current conversion and boosting all-in-one.

[0012] Furthermore, the first load power supply unit also includes: an integrated secondary load power supply, whose input end is electrically connected to the output end of the first automatic conversion switch, and is used to power the secondary load of the integrated converter and booster; a battery compartment first load power supply, whose input end is electrically connected to the output end of the first automatic conversion switch, and the output end of the battery compartment first load power supply is electrically connected to the battery compartment.

[0013] Furthermore, the second load power supply unit includes: an integrated three-level load power supply, whose input end is electrically connected to the output end of the transformer, and is used to power the three-level load of the integrated converter and booster; a battery compartment second load power supply, whose input end is electrically connected to the output end of the transformer, and the output end of the battery compartment second load power supply is electrically connected to the battery compartment.

[0014] Furthermore, there are multiple battery compartments, and the multiple battery compartments are electrically connected to the output ends of the first load power supply unit respectively.

[0015] The energy storage system of the utility model is provided with a transformer and a first power supply line, and is no longer powered only from the booster station, but can also be powered through the power generation end. In conjunction with the first automatic switching switch, when one of the power supply lines fails and cannot supply power normally, power can be supplied through another power supply line, thereby realizing dual-circuit power supply and ensuring the stability of the power supply of the integrated converter and booster. At the same time, since electric energy can be continuously obtained from the power generation end, a large number of load power supplies can be supported at the same time, and long-term stable power supply can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the structure of an energy storage system according to an embodiment of the utility model;

[0017] List of reference numerals:

[0018] 100. Converter and booster integrated machine; 110. Transformer; 120. First power supply line; 130. Second power supply line; 140. First automatic transfer switch; 150. First load power supply unit; 151. First UPS; 152. First level load power supply of integrated machine; 153. Second level load power supply of integrated machine; 154. First load power supply of battery compartment; 160. Second load power supply unit; 161. Third level load power supply of integrated machine; 162. Second load power supply of battery compartment; 200. Battery compartment; 210. Second automatic transfer switch; 220. Third load power supply unit; 221. Second UPS; 222. First level load power supply of battery compartment; 223. Second level load power supply of battery compartment; 230. Fourth load power supply unit; 231. Third level load power supply of battery compartment; 232. Third load power supply of battery compartment; 300. Power generation end; 400. Boosting station. DETAILED DESCRIPTION

[0019] In order to enable those skilled in the art to better understand the technical solution of the present invention, the energy storage system provided by the present invention is described in detail below in conjunction with the accompanying drawings.

[0020] With the development of new energy sources such as wind power generation and photovoltaic power generation, the amount of electricity connected to the grid continues to increase. During the grid connection process, the disadvantages of wind and photovoltaic power generation have gradually become apparent. Both of these power generation methods are volatile, so energy storage, converter and boost integrated cabins and energy storage battery cabins came into being.

[0021] The existing energy storage, conversion and boosting integrated cabin is usually powered by an AC power supply through a boosting power station, and some important load power supply lines are equipped with UPS (Uninterruptible Power Supply). However, since the UPS is installed in the energy storage, conversion and boosting integrated cabin, and the space inside the cabin is limited, the UPS capacity is small, the number of load power supplies that the UPS supports at the same time is limited, and long-term stable power supply cannot be achieved, resulting in poor operating stability of the existing energy storage system.

[0022] In order to solve the above technical problems, Figure 1 The embodiment of the utility model shown discloses an energy storage system, including: a converter and booster integrated machine 100 and a battery compartment 200 , wherein the converter and booster integrated machine 100 is used to store the electric energy of the power generation end 300 in the battery compartment 200 .

[0023] Specifically, if Figure 1 As shown, the converter and booster 100 includes: a transformer 110, a first power supply line 120, a second power supply line 130, a first automatic transfer switch 140 and a first load power supply unit 150. The input end of the transformer 110 is connected to the power generation end 300. The first automatic transfer switch 140 has a first input end, a second input end and an output end. The first input end of the first automatic transfer switch 140 is electrically connected to the output end of the transformer 110 through the first power supply line 120. The second input end of the first automatic transfer switch 140 is electrically connected to the output end of the booster station 400 through the second power supply line 130. The output end of the first automatic transfer switch 140 is electrically connected to the input end of the first load power supply unit 150, and the output end of the first load power supply unit 150 is electrically connected to the battery compartment 200.

[0024] When in use, the first automatic switching switch 140 can detect the power supply status of the first power supply line 120 and the second power supply line 130 in real time, and control the first power supply line 120 to be connected to the first load power supply unit 150, or the second power supply line 130 to be connected to the first load power supply unit 150 according to the power supply status of the first power supply line 120 and the second power supply line 130.

[0025] For example, when both the first power supply line 120 and the second power supply line 130 are in a normal power supply state, the first automatic transfer switch 140 can be preset to only connect the first power supply line 120 with the first load power supply unit 150. When the first power supply line 120 fails and cannot supply power normally, the first automatic transfer switch 140 disconnects the first power supply line 120 from the first load power supply unit 150 and connects the second power supply line 130 with the first load power supply unit 150. In addition, the first automatic transfer switch 140 can also be preset to only connect the second power supply line 130 with the first load power supply unit 150. When the second power supply line 130 fails and cannot supply power normally, the first automatic transfer switch 140 disconnects the second power supply line 130 from the first load power supply unit 150 and connects the first power supply line 120 with the first load power supply unit 150, thereby ensuring the stability of power supply of the first load power supply unit 150.

[0026] The energy storage system of the utility model is provided with a transformer 110 and a first power supply line 120. It is no longer powered only from the booster station 400, but can also be powered through the power generation end 300. In conjunction with the first automatic switching switch 140, when one of the power supply lines fails and cannot supply power normally, power can be supplied through another power supply line, thereby realizing dual-circuit power supply and ensuring the stability of power supply of the converter and booster 100. At the same time, since electric energy can be continuously obtained from the power generation end 300, a large number of load power supplies can be supported at the same time, and long-term stable power supply can be achieved.

[0027] Specifically, the first load power supply unit 150 includes: a first UPS 151, an integrated machine primary load power supply 152, an integrated machine secondary load power supply 153 and a battery compartment first load power supply 154. Among them, the first UPS 151 has an output end and an input end, and the input end of the first UPS 151 is electrically connected to the output end of the first automatic transfer switch 140; the output end of the first UPS 151 is electrically connected to the input end of the integrated machine primary load power supply 152, and the integrated machine primary load power supply 152 is used to power the primary load of the conversion and boosting integrated machine 100. By electrically connecting the integrated machine primary load power supply 152 to the first UPS 151, the integrated machine primary load power supply 152 can be powered by the first UPS 151, even in the extreme case that both the first power supply line 120 and the second power supply line 130 cannot supply power normally, the stable power supply of the first UPS 151 can be used to ensure the stability, safety and reliability of the power supply.

[0028] It should be noted that, in this embodiment, the integrated machine's first-level load power supply 152 includes: a measurement and control power supply, a high-voltage switch control power supply and a switch power supply. By dividing the measurement and control power supply, the high-voltage switch control power supply and the switch power supply into first-level load power supplies, the first UPS 151 can be used to ensure that important first-level loads such as the control system, fire alarm system, and fire protection system can operate normally in the event of a power outage. At the same time, since the number of load power supplies is reduced, the power supply pressure of the UPS can also be reduced and the power supply time of the UPS can be increased.

[0029] In this embodiment, the input end of the integrated machine secondary load power supply 153 is electrically connected to the output end of the first automatic transfer switch 140, and is used to supply power to the secondary load of the current conversion and boosting integrated machine 100. The integrated machine secondary load power supply 153 includes: a smoke sensor power supply and a temperature control host power supply. Compared with the measurement and control power supply, the high-voltage switch control power supply and the switch power supply, the smoke sensor power supply and the temperature control host power supply are relatively less important, so they can be directly electrically connected to the output end of the first automatic transfer switch 140 without being connected to the UPS, thereby ensuring stable power supply while reducing the power supply burden of the UPS.

[0030] It should be noted that in some other embodiments not shown in the figures, some load power supplies of lower importance in the first-level load power supply of the integrated machine may not be connected to the UPS to further reduce the power supply burden of the UPS.

[0031] The input end of the first load power supply 154 of the battery compartment is electrically connected to the output end of the first automatic transfer switch 140 , and the output end of the first load power supply 154 of the battery compartment is electrically connected to the battery compartment 200 .

[0032] In this embodiment, the converter and booster 100 further includes: a second load power supply unit 160, the input end of the second load power supply unit 160 is electrically connected to the output end of the transformer 110, and the output end of the second load power supply unit 160 is electrically connected to the battery compartment 200. The second load power supply unit 160 includes: an integrated machine three-level load power supply 161 and a battery compartment second load power supply 162. The input end of the integrated machine three-level load power supply 161 is electrically connected to the output end of the transformer 110, and is used to supply power to the three-level load of the converter and booster 100, such as lighting power supply, etc. By setting the relatively unimportant lighting power supply, etc. as a single-channel power supply, the modification cost can be reduced; the input end of the battery compartment second load power supply 162 is electrically connected to the output end of the transformer 110, and the output end of the battery compartment second load power supply 162 is electrically connected to the battery compartment 200.

[0033] It should be noted that the battery compartment first load power supply 154 set in the first load power supply unit 150 and the battery compartment second load power supply 162 in the second load power supply unit 160 are both connected to the same battery compartment 200, that is, the battery compartment 200 also realizes dual power supply, thereby improving the stability and reliability of the operation of the battery compartment 200.

[0034] Specifically, the battery compartment 200 includes: a second automatic transfer switch 210, a third load power supply unit 220 and a fourth load power supply unit 230. The input end of the fourth load power supply unit 230 is electrically connected to the battery compartment second load power supply 162 in the second load power supply unit 160. The second automatic transfer switch 210 has a first input end, a second input end and an output end. The first input end of the second automatic transfer switch 210 is electrically connected to the output end of the first load power supply unit 150, the second input end of the second automatic transfer switch 210 is electrically connected to the output end of the fourth load power supply unit 230, and the output end of the second automatic transfer switch 210 is electrically connected to the input end of the third load power supply unit 220.

[0035] When in use, the second automatic switching switch 210 is used to detect the power supply status of the output end of the first load power supply unit 150 and the output end of the fourth load power supply unit 230, and according to the power supply status of the two, control the third load power supply unit 220 to be connected with the first load power supply unit 150, or the third load power supply unit 220 to be connected with the fourth load power supply unit 230.

[0036] In the energy storage system of the utility model, not only the converter and booster 100 adopts dual-circuit power supply, but also the battery compartment 200 adopts dual-circuit power supply, one of which is powered by the converter and booster 100, and the other is connected to the power generation end 300 through the transformer 110, and can be powered by the power generation end 300. Therefore, when the second power supply line 130 cannot supply power normally, even if the first automatic transfer switch 140 does not work normally, resulting in the first power supply line 120 being unable to conduct with the first load power supply unit 150, the fourth load power supply unit 230 and the second load power supply unit 160 can be conducted with the transformer 110 through the second transfer switch, thereby ensuring the stability of the power supply of the battery compartment 200.

[0037] like Figure 1As shown, the third load power supply unit 220 includes: a second UPS 221, a battery compartment primary load power supply 222, and a battery compartment secondary load power supply 223. The second UPS 221 has an output end and an input end, and the input end of the second UPS 221 is electrically connected to the output end of the second automatic transfer switch 210; the battery compartment primary load power supply 222 is electrically connected to the output end of the second UPS 221, and is used to supply power to the primary load of the battery compartment 200. By electrically connecting the battery compartment primary load power supply 222 to the second UPS 221, the battery compartment primary load power supply 222 can be powered by the second UPS 221. Even in the extreme case where both power supply lines cannot supply power normally, the stable power supply of the second UPS 221 can be used to ensure the safety and reliability of the battery compartment 200.

[0038] It should be noted that, in this embodiment, the battery compartment first-level load power supply 222 includes: a measurement and control power supply, a high-voltage switch control power supply and a switch power supply. By dividing the measurement and control power supply, the high-voltage switch control power supply and the switch power supply into first-level load power supplies, the first UPS151 can be used to ensure that important first-level loads such as the control system, fire alarm system, and fire protection system can operate normally in the event of a power outage. At the same time, since the number of load power supplies is reduced, the power supply pressure of the UPS can also be reduced and the power supply time of the UPS can be increased.

[0039] In this embodiment, the secondary load power supply 223 of the battery compartment is electrically connected to the output end of the second automatic transfer switch 210, and is used to supply power to the secondary load of the battery compartment 200. The secondary load power supply 223 of the battery compartment includes: a smoke sensor power supply and a temperature control host power supply. Compared with the measurement and control power supply, the high-voltage switch control power supply and the switch power supply, the smoke sensor power supply and the temperature control host power supply are relatively less important, so they can be directly electrically connected to the output end of the first automatic transfer switch 140 without being connected to the UPS, thereby ensuring stable power supply and reducing the power supply pressure of the UPS.

[0040] In this embodiment, the fourth load power supply unit 230 also includes: a battery compartment tertiary load power supply 231 and a battery compartment third load power supply 232. The input end of the battery compartment tertiary load power supply 231 is electrically connected to the output end of the second load power supply unit 160, and is used to power the tertiary load of the battery compartment 200, such as: lighting power supply, etc. By setting the relatively unimportant lighting power supply, etc. as a single-channel power supply, the modification cost can be reduced. The input end of the battery compartment third load power supply 232 is electrically connected to the output end of the second load power supply unit 160, and the output end of the battery compartment third load power supply 232 is electrically connected to the second input end of the second automatic transfer switch 210. By setting the battery compartment third load power supply 232, when the battery compartment first load power supply 154 cannot work normally, the third load power supply unit 220 can be powered, thereby ensuring the stability of the operation of the battery compartment 200.

[0041] In this embodiment, there may be multiple battery compartments 200, and the multiple battery compartments 200 are respectively electrically connected to the output end of the first load power supply unit 150. Specifically, there are multiple battery compartment first load power supply 154 and battery compartment 200 second load unit, and two of them are grouped to supply power to the same battery compartment 200. Each battery compartment 200 is connected in parallel, so as to ensure that each battery compartment 200 is dual-circuit powered, thereby improving the stability of the battery compartment 200.

[0042] It is understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present invention, but the present invention is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. An energy storage system, comprising: A converter and booster integrated machine (100) and a battery compartment (200), wherein the converter and booster integrated machine (100) is used to store electric energy from a power generation end (300) in the battery compartment (200), and is characterized in that the converter and booster integrated machine (100) comprises: A transformer (110), an input end of which is connected to the power generation end (300); A first power supply line (120) electrically connected to an output end of the transformer (110); A second power supply line (130) is electrically connected to an output end of the booster station (400); A first automatic transfer switch (140) having a first input end, a second input end and an output end, wherein the first input end of the first automatic transfer switch (140) is electrically connected to the first power supply line (120), and the second input end of the first automatic transfer switch (140) is electrically connected to the second power supply line (130); The first load power supply unit (150) has an input end electrically connected to the output end of the first automatic transfer switch (140), and the output end of the first load power supply unit (150) is electrically connected to the battery compartment (200).

2. The energy storage system according to claim 1, characterized in that: The current conversion and voltage boosting integrated machine (100) further comprises: The second load power supply unit (160) has an input end electrically connected to the output end of the transformer (110), and the output end of the second load power supply unit (160) is electrically connected to the battery compartment (200).

3. The energy storage system according to claim 2, characterized in that: The battery compartment (200) comprises: A second automatic transfer switch (210) having a first input end, a second input end and an output end, wherein the first input end of the second automatic transfer switch (210) is electrically connected to the output end of the first load power supply unit (150); a third load power supply unit (220), an input end of which is electrically connected to an output end of the second automatic transfer switch (210); The fourth load power supply unit (230) has an input end electrically connected to the output end of the second load power supply unit (160), and the second input end of the second automatic transfer switch (210) is electrically connected to the output end of the fourth load power supply unit (230).

4. The energy storage system according to claim 3, characterized in that: The third load power supply unit (220) comprises: A second UPS (221) having an output end and an input end, wherein the input end of the second UPS (221) is electrically connected to the output end of the second automatic transfer switch (210); A primary load power supply (222) of the battery compartment is electrically connected to the output end of the second UPS (221) and is used to supply power to the primary load of the battery compartment (200).

5. The energy storage system according to claim 4, characterized in that: The third load power supply unit (220) further comprises: A battery compartment secondary load power supply (223) is electrically connected to the output end of the second automatic transfer switch (210) and is used to supply power to the secondary load of the battery compartment (200).

6. The energy storage system according to claim 3, characterized in that: The fourth load power supply unit (230) further comprises: A battery compartment tertiary load power supply (231), an input end of which is electrically connected to an output end of the second load power supply unit (160), and is used to supply power to the tertiary load of the battery compartment (200); The third load power supply (232) in the battery compartment has an input end electrically connected to the output end of the second load power supply unit (160), and the output end of the third load power supply (232) in the battery compartment is electrically connected to the second input end of the second automatic transfer switch (210).

7. The energy storage system according to claim 1, characterized in that: The first load power supply unit (150) comprises: A first UPS (151) having an output end and an input end, wherein the input end of the first UPS (151) is electrically connected to the output end of the first automatic transfer switch (140); An integrated primary load power supply (152), whose input end is electrically connected to the output end of the first UPS (151), is used to supply power to the primary load of the current conversion and voltage boosting integrated machine (100).

8. The energy storage system according to claim 7, characterized in that: The first load power supply unit (150) further comprises: An integrated machine secondary load power supply (153), whose input end is electrically connected to the output end of the first automatic transfer switch (140) and is used to supply power to the secondary load of the current conversion and voltage boosting integrated machine (100); The first load power supply (154) of the battery compartment has an input end electrically connected to the output end of the first automatic transfer switch (140), and the output end of the first load power supply (154) of the battery compartment is electrically connected to the battery compartment (200).

9. The energy storage system according to claim 2, characterized in that: The second load power supply unit (160) comprises: An integrated three-level load power supply (161), whose input end is electrically connected to the output end of the transformer (110) and is used for supplying power to the three-level load of the current conversion and voltage boosting integrated machine (100); The second load power supply (162) of the battery compartment has an input end electrically connected to the output end of the transformer (110), and the output end of the second load power supply (162) of the battery compartment is electrically connected to the battery compartment (200).

10. The energy storage system according to claim 1, characterized in that: There are a plurality of battery compartments (200), and the plurality of battery compartments (200) are electrically connected to output ends of the first load power supply unit (150) respectively.

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