Energy storage confluence power distribution control system

Abstract

The utility model discloses an energy storage confluence power distribution control system, which belongs to the technical field of energy storage power distribution and comprises a UPS (uninterrupted power supply) unit and a PCS (personal computer system) unit. The PCS unit comprises a first PCS unit and a second PCS unit; the UPS unit comprises a UPS module, the input end of the UPS module is connected with an automatic change-over switch, the automatic change-over switch comprises a frequently-used power supply connecting end and a standby power supply connecting end, the frequently-used power supply connecting end is used for being connected with a frequently-used alternating current power supply, and the standby power supply connecting end is used for being connected with a standby alternating current power supply; the output end of the UPS module is connected with a UPS-L wire and a UPS-R wire, and the UPS-L wire and the UPS-R wire are further connected with a QF14 switch and a QF15 switch. The QF14 switch is connected with the first PCS unit, and the QF15 switch is connected with the second PCS unit. In the scheme, on one hand, by arranging the common alternating current power supply and the standby alternating current power supply, the operation stability of the system is improved, and once the common alternating current power supply breaks down, the standby alternating current power supply can be adopted in time for power supply;

Description

Technical Field

[0001] This utility model relates to the field of energy storage and power distribution technology, and more specifically, to an energy storage and power distribution control system. Background Technology

[0002] With the development of new energy, new energy has been widely used in various fields. However, when a large amount of unstable new energy power generation is generated at the same time, it will put unbearable pressure on the power grid. How to maintain the balance of "source following load" of the power grid has become the primary problem for the development of new energy.

[0003] Current methods typically employ combiner cabinets for energy storage storage to balance power supply and distribution between renewable energy generation and the power grid. As a critical component of the energy storage containerized battery system, the reliability of the combiner cabinet's power supply and distribution affects the stable operation of the energy storage battery management system and fire protection system, thus impacting the overall safe and reliable operation of the energy storage system and the continuous and stable power supply to the power system. Therefore, the demands for the safety, reliability, and stability of the energy storage system's power supply and distribution are becoming increasingly stringent. If the power supply in the combiner cabinet fails, it will severely compromise the safe and reliable operation of the combiner cabinet. Utility Model Content

[0004] This utility model provides an energy storage combiner power distribution control system to improve the safety and reliability of combiner cabinet operation.

[0005] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0006] An energy storage combiner power distribution control system includes a UPS unit and a PCS unit;

[0007] The PCS unit includes a first PCS unit and a second PCS unit;

[0008] The UPS unit includes a UPS module, the input terminal of which is connected to an automatic transfer switch. The automatic transfer switch includes a main power connection terminal and a backup power connection terminal. The main power connection terminal is used to connect to a main AC power source, and the backup power connection terminal is used to connect to a backup AC power source.

[0009] The output terminal of the UPS module is connected to the UPS-L wire and the UPS-R wire, and the UPS-L wire and the UPS-R wire are also connected to the QF14 switch and the QF15 switch; the QF14 switch is connected to the first PCS unit, and the QF15 switch is connected to the second PCS unit.

[0010] This solution improves system stability by providing both a primary and backup AC power supply. If the primary AC power supply fails, the backup AC power supply can be used immediately. Furthermore, the QF14 and QF15 switches connected to the UPS module control the operation of the PCS unit. If the UPS module fails, the battery power in the PCS unit can promptly supply power to the equipment, further enhancing system safety and reliability and ensuring continuous and stable operation.

[0011] As a further improvement, the common power supply connection terminal of the automatic transfer switch is connected to the common AC power supply via a QF13 switch.

[0012] As a further improvement, a first surge protector is also provided at the input terminal of the primary AC power supply. As a further improvement, a second surge protector is also provided at the input terminal of the backup AC power supply. By providing surge protectors, in the event of lightning overvoltage or operational overvoltage, the surge protectors can reduce the voltage, thereby protecting the UPS and other electrical equipment and ensuring a more stable power supply.

[0013] As a further improvement, the first PCS unit includes a plurality of first battery packs, each first battery pack being connected in parallel to a positive busbar and a negative busbar, the positive busbar and the negative busbar being connected to a QF18 switch, and the QF18 switch being electrically connected to the QF14 switch.

[0014] As a further improvement, the second PCS unit includes multiple first battery packs, each connected in parallel to a positive busbar and a negative busbar. The positive and negative busbars are connected to a QF19 switch, which is electrically connected to a QF15 switch. A QF14 switch corresponds to a QF18 switch, and a QF15 switch corresponds to a QF19 switch. The operation of the PCS unit can be controlled from the UPS unit side by correspondingly controlling the flow of the QF18 and QF19 switches via the QF14 and QF15 switches. When the UPS unit fails, the PCS unit can respond promptly and provide power.

[0015] As a further improvement, the UPS module is also connected to a UPS battery. The UPS battery is a 120-minute backup battery, which can supply power to loads such as fire protection in the event of AC power failure, further improving the reliability of system power distribution.

[0016] As a further improvement, the UPS battery includes a battery string formed by several battery cells connected in series, and the battery strings are connected in parallel.

[0017] As a further improvement, each of the battery strings is secured to the base by a U-shaped clamp.

[0018] As a further improvement, the UPS unit is also connected to the BMS management module. Real-time monitoring of the UPS unit's operating status via the BMS management module enables maintenance personnel to promptly identify and address safety hazards and faults, ensuring the safe and reliable operation of the energy storage combiner power distribution control system.

[0019] Other technical problems that the energy storage and distribution control system of this utility model can solve, other technical features contained in the technical solution, and the advantages brought by these technical features will be further explained in detail with reference to the accompanying drawings. Attached Figure Description

[0020] Figure 1 Electrical system diagram for the PCS unit of the control system;

[0021] Figure 2 Diagram of the UPS unit power distribution system for the control system;

[0022] Figure 3 This is a diagram of the battery structure in a UPS unit.

[0023] Label Explanation:

[0024] 1. UPS unit; 11. Automatic transfer switch; 12. Surge protector; 13. UPS battery; 2. PCS unit; 31. Bottom bracket; 32. Side bracket; 33. U-shaped clamp; 34. Base; 35. Battery cell; 36. Stud; 37. Wiring. Detailed Implementation

[0025] To further understand the content of this utility model, a detailed description of this utility model will be provided in conjunction with the accompanying drawings and embodiments.

[0026] The structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0027] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate for the embodiments of this application described herein.

[0028] Combination Figure 1 and Figure 2As shown, this embodiment provides an energy storage combiner power distribution control system, including a UPS unit 1 and a PCS unit 2.

[0029] In energy storage and power distribution applications, UPS (Uninterruptible Power Supply) primarily converts DC power to AC power through inverters and other modular circuits, ensuring that equipment can continue to operate normally during power outages and preventing data loss or equipment damage. PCS (Power Conversion System) is a device used to convert and control electrical energy. Its main function is to control the charging and discharging process of batteries and perform AC-DC conversion, thereby achieving the storage and release of electrical energy.

[0030] Specifically, in this embodiment, PCS unit 2 includes a first PCS unit and a second PCS unit. The UPS unit 1 includes a UPS module 10. The input terminal of the UPS module 10 is connected to an automatic transfer switch 11. The automatic transfer switch 11 includes a main power connection terminal and a backup power connection terminal. The main power connection terminal is used to connect to the main AC power supply, and the backup power connection terminal is used to connect to the backup AC power supply. The output terminal of the UPS module 10 is connected to a UPS-L wire and a UPS-R wire. A QF14 switch and a QF15 switch are also connected to the UPS-L wire and the UPS-R wire. The QF14 switch is connected to the first PCS unit, and the QF15 switch is connected to the second PCS unit.

[0031] Both the first and second PCS units are equipped with PCS modules. The UPS module 10 and the PCS module in this solution are existing technologies and can be purchased according to the system design parameters.

[0032] In this scheme, combined with Figure 2 As shown, the primary AC power supply provides power to electrical equipment such as liquid chillers, air conditioners, lighting switches, and fire protection systems. If the primary AC power supply fails, the automatic transfer switch 11 will respond promptly and automatically switch to the backup AC power supply, ensuring timely power supply to the aforementioned electrical equipment, especially the safety-related fire protection system.

[0033] Additionally, switch QF14 is connected to the first PCS unit, and switch QF15 is connected to the second PCS unit. This connection is a control connection; switch QF14 controls the first PCS unit, and switch QF15 controls the second PCS unit. Both switches QF14 and QF15 are connected to UPS module 10. If UPS module 10 fails, switches QF14 and QF15 can be used to control the PCS units, allowing the battery power in the PCS units to supply power to the equipment.

[0034] In this solution, on the one hand, by setting up a primary AC power supply and a backup AC power supply, the system's operational stability is improved. If the primary AC power supply fails, the backup AC power supply can be used promptly to provide power. On the other hand, the QF14 and QF15 switches connected to the UPS module 10 can control the operation of the PCS unit. If the UPS module 10 fails, the battery power in the PCS unit can promptly supply power to the equipment, further improving the system's safety and reliability, and ensuring continuous and stable system operation.

[0035] Furthermore, the normal power supply connection terminal of the automatic transfer switch 11 is connected to the normal AC power supply via the QF13 switch. For example... Figure 2 As shown, specifically, the primary AC power supply is connected to switch QF13, which is connected to the primary power supply connection terminal of automatic transfer switch 11. Automatic transfer switch 11 is connected to UPS module 10. In the event of a prolonged failure of the primary AC power supply, switch QF13 can be disconnected, allowing the backup AC power supply to supply power only to electrical equipment requiring safety, thus effectively regulating power distribution.

[0036] To improve power supply reliability, a first surge protector 12 is installed at the input of the main AC power supply. A second surge protector is installed at the input of the backup AC power supply. These surge protectors reduce voltage during lightning and operational overvoltage events, thus protecting the UPS and other electrical equipment and ensuring a more stable power supply.

[0037] like Figure 1 As shown, the first PCS unit includes multiple first battery packs, each connected in parallel to a positive busbar and a negative busbar. The positive and negative busbars are connected to switch QF18, which is electrically connected to switch QF14. The second PCS unit also includes multiple first battery packs, each connected in parallel to a positive and a negative busbar. The positive and negative busbars are connected to switch QF19, which is electrically connected to switch QF15. In this design, switch QF14 corresponds to switch QF18, and switch QF15 corresponds to switch QF19. Switches QF14 and QF15 can control the operation of switches QF18 and QF19, thus controlling the operation of the PCS unit from the UPS unit side. When the UPS unit fails, the PCS unit can respond promptly and provide power.

[0038] Preferably, the UPS module 10 is also connected to a UPS battery 13, which is a 120-minute backup battery. In the event of an AC power failure, it can supply power to loads such as fire protection equipment, further improving the reliability of the system power distribution. Simultaneously, a leakage current protection switch and a QF10 switch are configured at the output of the UPS module 10 to provide power distribution safety for the UPS unit.

[0039] Specifically, the UPS battery 13 comprises a battery string formed by connecting several individual battery cells 35 in series, and the battery strings are connected in parallel. Each battery string is fixed to the base 34 by a U-shaped clamp 33. This integrates the UPS battery 13 onto the base 34, facilitating installation. Specifically, as... Figure 3 As shown, the base 34 is formed by multiple bottom supports 31. To further secure the batteries, side supports 32 are also provided on the sides of the battery string. One end of the side support 32 is fixedly connected to the base 34, and the other end abuts against the side of each battery cell 35. Each battery cell 35 in the battery string is connected to two terminals 37, a positive terminal and a negative terminal, for series connection of the battery cells. Studs 36 are provided on both sides of the base 34, a positive stud and a negative stud, for parallel connection of the battery strings.

[0040] In a preferred embodiment, UPS unit 1 is also connected to a BMS management module. Specifically, it is connected to the BMS management module via UPS-L and UPS-R cables. The BMS management module monitors the UPS unit's operating status in real time, enabling maintenance personnel to promptly identify and address safety hazards and faults, ensuring the safe and reliable operation of the energy storage combiner power distribution control system.

[0041] The terms “installation,” “setup,” “equipped with,” and “connection” used herein should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; 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, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0042] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the figures shown are only one embodiment of the present invention; the actual structure is not limited thereto. Therefore, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. An energy storage bus distribution control system, characterized by: The UPS unit (1) and the PCS unit (2) are included. The PCS unit (2) includes a first PCS unit and a second PCS unit. The UPS unit (1) includes a UPS module (10), an input end of the UPS module (10) is connected with an automatic switch (11), the automatic switch (11) includes a normal power connection end and a backup power connection end, the normal power connection end is used for connecting with a normal AC power supply, and the backup power connection end is used for connecting with a backup AC power supply. An output end of the UPS module (10) is connected with a UPS-L wire and a UPS-R wire, and the UPS-L wire and the UPS-R wire are further connected with a QF14 switch and a QF15 switch; the QF14 switch is connected with the first PCS unit, and the QF15 switch is connected with the second PCS unit.

2. The energy storage bus distribution control system of claim 1, wherein: The normal power connection end of the automatic switch (11) is connected with the normal AC power supply through a QF13 switch.

3. The energy storage busbar distribution control system of claim 2, wherein: An input end of the normal AC power supply is further provided with a first surge protector (12).

4. The energy storage bus distribution control system of any one of claims 1-3, wherein: An input end of the backup AC power supply is further provided with a second surge protector.

5. The energy storage busbar distribution control system of claim 1, wherein: The first PCS unit includes a plurality of first battery groups, each first battery group is connected in parallel to a positive busbar and a negative busbar, the positive busbar and the negative busbar are connected with a QF18 switch, and the QF18 switch is electrically connected with the QF14 switch.

6. The energy storage busbar distribution control system of claim 1 or 5, wherein: The second PCS unit includes a plurality of first battery groups, each first battery group is connected in parallel to a positive busbar and a negative busbar, the positive busbar and the negative busbar are connected with a QF19 switch, and the QF19 switch is electrically connected with the QF15 switch.

7. The energy storage busbar distribution control system of claim 1, wherein: The UPS module (10) is further connected with a UPS storage battery (13).

8. The energy storage bus distribution control system of claim 7, wherein: The UPS storage battery (13) includes a plurality of battery strings formed by battery monomers (35) connected in series, and the battery strings are connected in parallel.

9. The energy storage bus distribution control system of claim 8, wherein: Each battery string is fixed to a base (34) through a U-shaped hoop (33).

10. The energy storage busbar distribution control system of claim 1, wherein: The UPS unit (1) is further connected with a BMS management module.

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