Liquid flow energy storage container power supply system

Abstract

The utility model relates to a liquid flow energy storage container power supply system which comprises a high-voltage switch, a boosting transformer, a low-voltage bus, a plurality of PCS power conversion systems, a plurality of battery systems, a low-voltage switch and a self-electricity bus. One end of the high-voltage switch is connected with the collection bus, the other end is connected with one end of the boosting transformer, and the other end of the boosting transformer is connected with the low-voltage bus; the low-voltage bus is connected with the battery systems through the PCS power conversion systems, the PCS power conversion systems are used for electric energy conversion, and the battery systems are used for storing electric energy; the low-voltage bus is connected with the self-powered bus through the low-voltage switch, and the self-powered bus is arranged in the liquid flow energy storage container and used for supplying power to all electric equipment in the liquid flow energy storage container.

Description

Technical Field

[0001] This utility model relates to a liquid flow energy storage container power supply system, belonging to the field of liquid flow energy storage container power supply technology. Background Technology

[0002] Containerized flow storage systems have a large load, and the current main power supply solution is to set up a separate 35kV step-down transformer and a centralized low-voltage distribution cabinet to supply power to all flow storage containers in a certain string. At the same time, a distribution panel is set up inside the flow storage container to supply power to all electrical equipment inside the flow storage container through cables.

[0003] The current solution requires a separate transformer, which not only increases the cost of the transformer and high- and low-voltage switchgear, but also results in a large number of cables from the low-voltage distribution panel to the equipment, leading to a higher probability of failure and higher costs, as well as increased losses on the transformer and other equipment. Furthermore, the power supply to the equipment inside the container is entirely connected by cables, resulting in a large number of cables and an increased probability of failure. Utility Model Content

[0004] In order to solve the problems existing in the prior art, this utility model proposes a liquid flow energy storage container power supply system.

[0005] The technical solution of this utility model is as follows:

[0006] A liquid flow energy storage container power supply system, comprising:

[0007] High-voltage switchgear, step-up transformer, low-voltage busbar, multiple PCS power conversion systems, multiple battery systems, low-voltage switchgear and self-use power busbar;

[0008] One end of the high-voltage switch is connected to the collecting bus, and the other end is connected to one end of the step-up transformer. The other end of the step-up transformer is connected to the low-voltage bus.

[0009] The low-voltage bus is connected to each battery system through each PCS power conversion system. The PCS power conversion system is used to convert electrical energy, and the battery system is used to store electrical energy.

[0010] The low-voltage busbar is connected to the self-use power busbar via a low-voltage switch. The self-use power busbar is located inside the flow storage container and is used to supply power to various electrical devices inside the flow storage container.

[0011] In a preferred embodiment, the self-powered busbar is horizontally fixed on the top inner wall of the liquid flow energy storage container and is arranged around the top inner wall of the liquid flow energy storage container.

[0012] As a preferred embodiment, the liquid flow energy storage container is equipped with several vertical busbars inside. The vertical busbars are T-connected to the self-powered busbar. The T-connection is a plug-in type. The vertical busbars are used to connect electrical equipment.

[0013] In a preferred embodiment, the self-use power bus is disposed inside an insulating shell, and the insulating shell is fixedly connected to the top inner wall of the liquid flow energy storage container via a bracket.

[0014] In a preferred embodiment, through holes are made at the adjacent side walls of two adjacent liquid flow energy storage containers, and the self-use power busbars on the top of the two liquid flow energy storage containers are connected by a vertical busbar passing through the through holes.

[0015] The effective effects of this utility model are as follows:

[0016] 1. This utility model provides a liquid flow energy storage container power supply system, which eliminates the need for a high-voltage self-use transformer and sets up a self-use power bus that is connected to the low-voltage bus via a low-voltage switch to draw power from the internal power supply equipment of the container. This reduces the need for transformers and high and low voltage switch cabinets, as well as cables from the low-voltage distribution panel to the equipment, thereby reducing the probability of system failure and reducing costs and operating losses.

[0017] 2. This utility model provides a liquid flow energy storage container power supply system, which uses dense busbars instead of cables inside the container to reduce the probability of system failure, and has the advantages of simple expansion and convenient connection.

[0018] Additional aspects and advantages of this invention will be set forth in the following description, and some of them will be obvious from the description, or may be learned by practice of the invention. Furthermore, various aspects and advantages of this invention may be realized and obtained by means of method steps and combinations particularly pointed out in the appended claims. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the system topology of this utility model;

[0020] Figure 2 A schematic diagram of the layout of a self-use power busbar inside a container is provided for an embodiment of this utility model;

[0021] Figure 3 A schematic diagram of a self-use power busbar fixed inside a container is provided for an embodiment of this utility model;

[0022] Figure 4 This is a schematic diagram of a self-use power busbar through-wall structure provided for an embodiment of this utility model.

[0023] The attached figures are labeled as follows:

[0024] 1. High-voltage switch; 2. Step-up transformer; 3. Low-voltage busbar; 4. PCS power conversion system; 5. Battery system; 6. Low-voltage switch. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] It should be understood that the step numbers used in the text are for ease of description only and are not intended to limit the order in which the steps are performed.

[0027] It should be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0028] The terms “comprising” and “including” indicate the presence of the described feature, whole, step, operation, element and / or component, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or collections thereof.

[0029] The term “and / or” refers to any combination of one or more of the associated listed items, as well as all possible combinations, and includes these combinations.

[0030] See Figure 1 This embodiment provides a liquid flow energy storage container power supply system, including:

[0031] 1. High-voltage switch; 2. Step-up transformer; 3. Low-voltage busbar; 4. Multiple PCS power conversion systems; 5. Multiple battery systems; 6. Low-voltage switch and self-use power busbar.

[0032] The aforementioned high-voltage switch 1, step-up transformer 2, low-voltage bus 3, PCS power conversion system 4, and battery system 5 are all existing equipment of the flow storage system and are also key equipment of the inverter system. The high-voltage switch 1 is a device that isolates the flow storage system from the step-up bus and provides protection for the step-up transformer 2.

[0033] The high-voltage switch 1 is connected to the collecting bus at one end and to one end of the step-up transformer 2 at the other end. The other end of the step-up transformer 2 is connected to the low-voltage bus 3. The step-up transformer 2 is used to provide step-up and step-down functions. Its main function is to step down the system's electrical energy and send it to the liquid flow energy storage system for storage, or to step up the electrical energy stored in the liquid flow energy storage system and send it to the system for consumption.

[0034] The low-voltage bus 3 is connected to each battery system 5 through each PCS power conversion system 4. The low-voltage bus 3 is used for current collection, which collects the electrical energy of the small-power flow storage system through the PCS power conversion system 4 and sends it to the step-up transformer 2, or distributes the system's electrical energy to the flow storage system for energy storage.

[0035] The PCS power conversion system 4 is used for power conversion and can achieve bidirectional power conversion. During charging, it converts the AC power from the grid into DC power to charge the battery system 5; during discharging, it converts the DC power from the battery system 5 into AC power and supplies it to the grid or meets load demands.

[0036] Battery system 5 is used to store electrical energy.

[0037] The low-voltage busbar 3 is connected to the self-use power busbar through the low-voltage switch 6. The main function of the low-voltage switch 6 is to isolate the self-use power busbar and the low-voltage busbar 3, and to provide protection for the self-use power busbar.

[0038] See details Figure 2 In a preferred embodiment of this invention, a self-contained power bus is arranged inside the flow storage container, and the self-contained power bus is used to supply power to various electrical devices inside the flow storage container.

[0039] In one embodiment, the self-powered busbar is horizontally fixedly installed on the top inner wall of the flow storage container (e.g., Figure 2 The self-use power horizontal busbar is arranged around the top inner wall of the liquid flow energy storage container.

[0040] In one embodiment, the fluid energy storage container is equipped with several vertical busbars (such as...). Figure 2 The vertical busbar (for self-use power) is T-connected to the self-use power busbar. The T-connection is a plug-in type, which is convenient for direct connection on site. The vertical busbar is used to connect electrical equipment.

[0041] In one embodiment, see details below. Figure 3 The self-use power bus is installed inside an insulating shell, which is fixedly connected to the top inner wall of the liquid flow energy storage container via a bracket.

[0042] In one embodiment, see details below. Figure 2 and 4Through holes are made at the adjacent side walls of two adjacent liquid flow energy storage containers to form a through-wall structure. Holes are pre-drilled at the through-wall position of the upper or one container, and corresponding holes are made at the lower or another container. The through-wall structure is pre-fixed to the opening of the lower or another container. When docking on site, the corresponding openings are aligned and the busbars in the upper or adjacent containers are directly plugged into the through-wall structure.

[0043] Based on the above embodiments, the present invention can achieve the following functions:

[0044] When the 35kV system charges the energy storage system, the electrical energy is supplied to the self-use power bus through the high-voltage switch 1, the step-up transformer 2, the low-voltage bus 3 and the low-voltage switch 6.

[0045] When the energy storage system discharges to the 35kV system, the electrical energy is supplied to the self-use power bus through the PCS power conversion system 4, battery system 5, low-voltage bus 3 and low-voltage switch 6.

[0046] When the 35kV system experiences a power outage, in order to ensure the normal operation of the energy storage system, it can supply power to the self-consumption bus through the PCS power conversion system 4, battery system 5, low-voltage bus 3 and low-voltage switch 6, thereby improving the reliability of the self-consumption system.

[0047] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A liquid flow energy storage container power supply system, characterized in that, include: High voltage switch (1), step-up transformer (2), low voltage bus (3), multiple PCS power conversion systems (4), multiple battery systems (5), low voltage switch (6) and self-use power bus; One end of the high-voltage switch (1) is connected to the busbar, and the other end is connected to one end of the step-up transformer (2). The other end of the step-up transformer (2) is connected to the low-voltage busbar (3). The low-voltage bus (3) is connected to each battery system (5) through each PCS power conversion system (4). The PCS power conversion system (4) is used to convert electrical energy, and the battery system (5) is used to store electrical energy. The low-voltage busbar (3) is connected to the self-use power busbar through the low-voltage switch (6). The self-use power busbar is arranged inside the liquid flow energy storage container and is used to supply power to various electrical equipment inside the liquid flow energy storage container.

2. The liquid flow energy storage container power supply system according to claim 1, characterized in that: The self-use power bus is horizontally fixed on the top inner wall of the liquid flow energy storage container and is arranged around the top inner wall of the liquid flow energy storage container.

3. The liquid flow energy storage container power supply system according to claim 2, characterized in that: The internal structure of the flow storage container is equipped with several vertical busbars, which are T-connected to the self-powered busbar. The T-connection is a plug-in type, and the vertical busbars are used to connect electrical equipment.

4. The liquid flow energy storage container power supply system according to claim 1, characterized in that: The self-use power bus is installed inside an insulating shell, which is fixedly connected to the top inner wall of the liquid flow energy storage container via a bracket.

5. The liquid flow energy storage container power supply system according to claim 1, characterized in that: Through holes are made at the adjacent side walls of two adjacent liquid flow energy storage containers, and the self-use power busbars on the top of the two liquid flow energy storage containers are connected by a vertical busbar passing through the through hole.

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