WO2023025040A1

WO2023025040A1 - Battery swapping station

Info

Publication number: WO2023025040A1
Application number: PCT/CN2022/113403
Authority: WO
Inventors: 刘大为; 姚帅; 马满堂; 李�昊; 朱连峻; 周科; 刘明义; 裴杰; 曹传钊; 朱勇; 曹曦; 徐若晨
Original assignee: 中国华能集团清洁能源技术研究院有限公司
Priority date: 2021-08-24
Filing date: 2022-08-18
Publication date: 2023-03-02
Also published as: CN113422419A; CN113422419B

Abstract

The present disclosure provides a battery swapping station. The battery swapping station comprises a new energy power generation device, a power grid access device, an inverter, a battery swapping battery, and a controller; the new energy power generation device is configured to convert new energy into first alternating current electric energy of a first voltage level and output the first alternating current electric energy; the power grid access device is configured to receive second alternating current electric energy of a second voltage level from a power grid and output the second alternating current electric energy; the controller is configured to send a charging instruction to the inverter; and the inverter can convert at least one of the first alternating current electric energy and the second alternating current electric energy into first direct current electric energy of a third voltage level on the basis of the charging instruction and charge the battery swapping battery by utilizing the first direct current electric energy.

Description

power station

Cross References to Related Applications

This application is based on a Chinese patent application with application number 202110971552.7 and a filing date of August 24, 2021, and claims the priority of this Chinese patent application. The entire content of this Chinese patent application is hereby incorporated by reference into this application.

technical field

The present disclosure relates to the technical field of charging, in particular to a power station.

Background technique

At present, electric energy has been widely used in people's daily life. For example, sweeping robots, electric kettles, and induction cookers in household appliances are convenient and fast, which can greatly reduce people's housework burden. less pollution. In the prior art, the electrical equipment can be charged through the power exchange station. However, the charging method of the existing power exchange station is not flexible enough, and the stability and reliability of the power supply of the power exchange station are low, which cannot meet the electricity demand of users.

Contents of the invention

The present disclosure aims to solve one of the technical problems in the above-mentioned technologies at least to a certain extent.

Therefore, the first purpose of the present disclosure is to propose a power exchange station, which includes a new energy power generation device and a grid connection device, which can combine the AC power generated by the new energy power generation device and the power grid, and the charging method is more flexible , which improves the stability and reliability of the power supply of the power station, and can meet the electricity demand of users.

An embodiment of the present invention proposes a power station, including: a new energy power generation device, the new energy power generation device is used to convert new energy into a first AC power of a first voltage level, and output the first AC power; A grid access device, the grid access device is used to receive the second AC power of the second voltage level from the power grid, and output the second AC power; an inverter, the inverter is respectively connected to the new The energy generating device is electrically connected to the grid access device; the battery is replaced, and the battery is electrically connected to the inverter; and a controller is used to send a charging instruction to the inverter, The inverter may convert at least one of the first AC power and the second AC power into first DC power of a third voltage level based on the charging instruction, and utilize the first DC power The replacement battery is charged.

According to the power exchange station of the embodiment of the present disclosure, the power exchange station includes a new energy power generation device and a power grid access device, and the AC power generated by the new energy power generation device and the power grid can be used in combination, the charging method is more flexible, and the power supply stability of the power exchange station is improved. High performance and reliability, which can meet the user's electricity demand.

In an embodiment of the present disclosure, the controller is further configured to send an access instruction to the grid access device in response to detecting that a preset grid access condition is met, and the grid access device may The access command establishes an electrical connection with the grid; or, the controller is further configured to send a disconnection command to the grid access device in response to detecting that the preset grid access condition is not met, so that The grid connection device may disconnect itself from the grid based on the disconnection instruction.

In an embodiment of the present disclosure, the preset grid access conditions include at least one of the following: the first alternating current power is less than the required power of the switching station; the target parameter of the grid is at a preset target within the value range.

In one embodiment of the present disclosure, the target parameter of the grid includes at least one of voltage, current and power.

In an embodiment of the present disclosure, the controller is further configured to send the charging instruction to the inverter in response to detecting that a preset charging condition is met.

In an embodiment of the present disclosure, the power exchange station further includes: a cloud server, the cloud server is configured to send the charging instruction to the controller in response to detecting that a preset charging condition is satisfied , the controller feeds back the charging instruction to the inverter.

In an embodiment of the present disclosure, the preset charging conditions include at least one of the following: there is any battery in the swapping station whose remaining power is less than the first preset threshold; there is any waiting battery in the swapping station The cumulative waiting time of the power exchange equipment reaches the second preset threshold; the remaining waiting time of any equipment to be replaced in the power exchange station is less than the third preset threshold; the first AC power is greater than the demand of the power exchange station electric energy, and the difference between the first AC electric energy and the required electric energy is greater than a fourth preset threshold.

In one embodiment of the present disclosure, the new energy power generation device includes at least one of a photovoltaic power generation device and a wind power generation device.

In one embodiment of the present disclosure, the inverter is a bidirectional energy storage converter.

In an embodiment of the present disclosure, the charging command carries at least one of identification information of the replacement battery, charging start time, charging end time, and charging power.

In an embodiment of the present disclosure, the controller is further configured to obtain identification information of the battery to be charged, and send the identification information to the inverter; the inverter is also configured to The received identification information determines the replacement battery to be charged.

In an embodiment of the present disclosure, the controller is further configured to: based on the remaining power of the replacement battery, the remaining waiting time of the equipment to be replaced, the first AC power and the required power of the replacement station At least one of the differences between them, with the minimum charging power as a constraint condition, determine the charging power of the replacement battery.

In an embodiment of the present disclosure, both the first voltage level and the second voltage level are greater than the third voltage level.

In an embodiment of the present disclosure, the switching station further includes an energy storage battery, and the energy storage battery is electrically connected to the inverter.

In an embodiment of the present disclosure, the controller is further configured to send an energy storage command to the inverter; and the inverter is further configured to convert the first AC power and the converting at least one of the second alternating current electric energies into the first direct current electric energy of the third voltage level, and using the first direct current electric energy to charge the energy storage battery.

In an embodiment of the present disclosure, the controller is further configured to send a discharge instruction to the inverter; and the inverter is further configured to transfer the third battery stored in the energy storage battery converting the first DC power at the voltage level into at least one of the first AC power at the first voltage level and the second AC power at the second voltage level, and converting the first The first AC power at the voltage level and the second AC power at the second voltage level are respectively fed back to the new energy generating device and the grid access device.

In an embodiment of the present disclosure, the new energy source includes at least one of light energy, wind energy and ocean energy.

Additional aspects and advantages of the disclosure will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the disclosure.

Description of drawings

The above and/or additional aspects and advantages of the present disclosure will become apparent and understandable from the following description of the embodiments in conjunction with the accompanying drawings, wherein:

FIG. 1 is a schematic diagram of a power station according to an embodiment of the present disclosure;

Fig. 2 is a schematic diagram of a power exchange station according to another embodiment of the present disclosure.

Detailed ways

Embodiments of the present disclosure are described in detail below, examples of which are illustrated in the drawings, in which the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present disclosure and should not be construed as limiting the present disclosure.

The substation according to the embodiments of the present disclosure will be described below with reference to the accompanying drawings.

FIG. 1 is a schematic diagram of a power exchange station according to an embodiment of the present disclosure.

As shown in FIG. 1 , a battery swapping station 100 according to an embodiment of the present disclosure includes a new energy power generation device 1 , a grid access device 2 , an inverter 3 , a battery swapping battery 4 , and a controller 5 .

The inverter 3 is electrically connected to the new energy power generation device 1 , the grid connection device 2 and the battery for battery replacement 4 respectively.

In the embodiment of the present disclosure, the new energy generating device 1 is used to convert new energy into a first AC power of a first voltage level, and output the first AC power.

In the embodiment of the present disclosure, the grid access device 2 is configured to receive the second AC power of the second voltage level from the grid, and output the second AC power.

In the embodiment of the present disclosure, the controller 5 is used to send a charging command to the inverter 3, and the inverter 3 can convert at least one of the first AC power and the second AC power into a third voltage level based on the charging command The first direct current electric energy, and use the first direct current electric energy to charge the replacement battery 4.

In the embodiment of the present disclosure, the inverter 3 can directly convert at least one of the first AC power and the second AC power into the first DC power, that is, directly convert the AC power of voltage level A into voltage level B. DC power, compared with the inverters in the related art, most of the inverters convert the AC power of voltage level A into DC power of voltage level A, and then convert the DC power of voltage level A into DC power of voltage level B, which simplifies the inverter The conversion step of the converter helps to improve the power conversion efficiency and reduce the power conversion loss.

It should be noted that, the first voltage level, the second voltage level, and the third voltage level can all be set according to actual conditions, and are not limited here. For example, both the first voltage level and the second voltage level are greater than the third voltage level.

In the embodiment of the present disclosure, the inverter 3 can convert at least one of the first AC power and the second AC power into the first DC power of the third voltage level based on the charging instruction, which may include the following three possible implementations Way:

Method 1. The inverter 3 can only convert the first AC power into the first DC power of the third voltage level based on the charging command, that is, only the first AC power generated by the new energy power generation device 1 is used to replace the battery 4 at this time. to charge.

Method 2. The inverter 3 can convert both the first AC power and the second AC power into the first DC power of the third voltage level based on the charging command, that is, the first AC generated by the new energy power generation device 1 can be used at the same time. The electric energy, as well as the second AC electric energy output by the grid, charges the swap battery 4 .

Method 3: The inverter 3 can only convert the second AC power into the first DC power of the third voltage level based on the charging command, that is, only the second AC power output from the grid is used to charge the swap battery 4 at this time.

In the embodiment of the present disclosure, the power exchange station includes a new energy power generation device and a power grid access device, which can combine the AC power generated by the new energy power generation device and the power grid respectively, and the charging method is more flexible, which improves the stability and stability of the power supply of the power exchange station. Reliability, can meet the user's electricity demand.

On the basis of any of the above-mentioned embodiments, the controller 5 is also used to detect whether the preset grid access conditions are currently met, and if the current grid access conditions are met, it indicates that the switching station can be connected to the grid at this time, and the controller 5 An access command can be sent to the grid access device 2, and the grid access device 2 can establish an electrical connection with the grid based on the access command.

In some embodiments of the present disclosure, the controller 5 detects that the current grid access conditions are not met, indicating that the power station cannot be connected to the grid at this time, and the controller 5 can send a disconnection command to the grid access device 2, and the grid access device 2 2 can disconnect itself from the electrical grid based on a disconnect command.

Wherein, the grid access condition can be set according to the actual situation, and there is no excessive limitation here. For example, the grid access condition includes at least one of the following.

Condition 1. The first alternating current power is less than the required power of the power station.

If the first AC power is less than the required power of the power exchange station, it indicates that the first AC power generated by the new energy power generation device 1 cannot meet the power demand of the power exchange station. electricity demand.

Conversely, if the first AC power is greater than or equal to the demanded power of the power exchange station, it indicates that the first AC power generated by the new energy power generation device 1 can meet the power demand of the power exchange station, and the power exchange station can meet the power demand without being connected to the power grid. , then it can be determined that the grid access conditions are not met at this time.

Condition 2. The target parameter of the power grid is within a preset target value range.

In the embodiments of the present disclosure, target parameters of the power grid can be detected in real time or periodically. It should be noted that the category of the target parameters is not limited too much, for example, the target parameters include but not limited to voltage, current, power and so on. The target value range is the value range of the target parameter when the power grid is in a stable state. It can be understood that target parameters of different categories may correspond to different target value ranges.

If the target parameter of the power grid is within the preset target value range, it indicates that the fluctuation range of the target parameter is small, and the stability of the power grid is better. At this time, it can be determined that the grid access condition is met, which is helpful to improve the power supply of the substation. stability and reliability.

Conversely, if the target parameter of the power grid is not within the preset target value range, it indicates that the fluctuation range of the target parameter is large, and the stability of the power grid is poor. When the stability of the grid is poor, the switching station is connected to the grid, which improves the stability and reliability of the power supply of the switching station.

Therefore, the controller can control whether the grid access device establishes an electrical connection with the grid based on whether the preset grid access conditions are currently satisfied, and the grid access is more flexible.

On the basis of any of the above-mentioned embodiments, the controller 5 is also used to detect whether the preset charging condition is currently met, and upon detecting that the charging condition is currently met, the controller 5 sends a charging command to the inverter 3 .

Wherein, the charging condition can be set according to the actual situation, and there is no excessive limitation here. For example, the charging condition includes at least one of the following:

Condition 1. There is any battery in the battery swapping station whose remaining power is less than the first preset threshold.

It should be noted that the first preset threshold is the critical value for judging whether the replacement battery needs to be charged, which can be set according to the actual situation, and is not limited here. For example, the first preset threshold can be the maximum value of the replacement battery. Allow charging power.

If the remaining power of any battery in the swap station is less than the first preset threshold, it indicates that there is a swap battery with low power in the swap station, which needs to be charged, and it can be determined that the charging condition is satisfied.

In one embodiment, the remaining power of the battery for the battery replacement can be the state of charge (State Of Charge, SOC) of the battery for the battery replacement.

Condition 2. The accumulative waiting time of any equipment to be swapped in the swap station reaches the second preset threshold.

In the embodiments of the present disclosure, the accumulated waiting time refers to the accumulated time from the time when the equipment to be replaced enters the power exchange station to the current time.

If the cumulative waiting time of any equipment to be replaced in the power exchange station reaches the second preset threshold, it indicates that there is a device to be replaced with a long cumulative waiting time in the power exchange station, and the battery in the equipment to be replaced needs to be replaced with a battery replacement battery , or charging the battery in the device to be replaced, it can be determined that the charging condition is met.

It should be noted that the second preset threshold may be set according to actual conditions, and is not limited here. For example, the second preset threshold may be set to 30 minutes.

In the embodiments of the present disclosure, the category of the equipment to be replaced is not limited too much, for example, the equipment to be replaced includes but not limited to vehicles, mobile phones, computers, and the like.

Condition 3. The remaining waiting time of any equipment to be replaced in the power-swapping station is less than the third preset threshold.

In the embodiments of the present disclosure, the remaining waiting time refers to the remaining time that the equipment to be replaced can stay in the power changing station.

If the remaining waiting time of any equipment to be replaced is less than the third preset threshold in the swapping station, it indicates that there is a device waiting to be replaced with a shorter remaining waiting time in the swapping station, and the battery in the swapping device needs to be treated with a swapping battery. Replace or charge the battery in the device to be replaced, it can be determined that the charging condition is met.

It should be noted that the third preset threshold may be set according to actual conditions, and is not limited here. For example, the third preset threshold may be set as 1 hour.

Condition 4. The first AC power is greater than the required power of the power station, and the difference between the first AC power and the required power is greater than a fourth preset threshold.

In the embodiment of the present disclosure, if the first AC power is greater than the required power of the power station, and the difference between the first AC power and the required power is greater than the fourth preset threshold, it indicates that the first AC generated by the new energy power generation device 1 If the electric energy can meet the electricity demand of the power exchange station, and the first AC electric energy is surplus, it can be determined that the charging condition is satisfied, so as to make full use of the first AC electric energy generated by the new energy generating device 1 .

It should be noted that the fourth preset threshold can be set according to actual conditions, and is not limited here.

Thus, the controller can send a charging command to the inverter when the charging condition is satisfied based on whether the charging condition is currently met, and the charging method is more flexible.

On the basis of any of the above-mentioned embodiments, the charging command carries at least one of identification information of the replacement battery 4 , charging start time, charging end time, and charging power.

In the embodiment of the present disclosure, identification information may be set in advance for each battery swapping battery 4 in the swapping station, so as to distinguish different battery swapping batteries 4 . Wherein, the identification information includes but not limited to text, characters, etc., which are not limited here.

In one embodiment, the controller 5 can determine the replacement battery that needs to be charged based on the remaining power of the replacement battery 4. For example, the controller 5 can determine the replacement battery 4 whose remaining power is less than the first preset threshold as The replacement battery 4 that needs to be charged. The controller 5 can also obtain the identification information of the replacement battery 4 that needs to be charged, and send the identification information to the inverter 3, and the inverter 3 can determine the replacement battery 4 that needs to be charged based on the received identification information.

In one embodiment, the controller 5 may be based on at least one of the remaining power of the replacement battery 4, the remaining waiting time of the equipment to be replaced, and the difference between the first AC power and the required power of the replacement station. , with the minimum charging power as the constraint condition, determine the charging power of the replacement battery. Therefore, this method can comprehensively consider the influence of the remaining power of the replacement battery, the remaining waiting time of the equipment to be replaced, and the difference between the first AC power and the required power of the replacement station on the charging power, so that the determined charging The power is more accurate, which helps to improve the charging efficiency, and the minimum charging power is the constraint condition, which helps to extend the service life of the replacement battery.

On the basis of any of the above-mentioned embodiments, as shown in FIG. 2 , the power exchange station 100 also includes a cloud server 6, and the cloud server 6 is used to detect whether the preset charging condition is currently met, and if it is detected that the charging condition is currently met, the cloud server 6 The charging instruction is sent to the controller 5, and the controller 5 feeds back the charging instruction to the inverter 3. Thus, the inverter can charge the swap battery according to the charging instruction from the cloud server. It should be noted that for relevant content about charging conditions, reference may be made to the foregoing embodiments, and details are not repeated here.

On the basis of any of the above embodiments, the new energy includes but not limited to light energy, wind energy, ocean energy, etc., which will not be limited here. For example, the new energy power generation device 1 may include at least one of a photovoltaic power generation device and a wind power generation device, wherein the photovoltaic power generation device may include a photovoltaic module, and the wind power generation device may include a horizontal axis fan, a vertical axis fan, and the like.

On the basis of any of the above embodiments, the inverter 3 is a bidirectional energy storage converter (Power Conversion System, PCS).

As shown in FIG. 2 , the power exchange station 100 further includes an energy storage battery 7 , and the inverter 3 is electrically connected to the energy storage battery 7 . The controller 5 is also used to send an energy storage command to the inverter 3, and the inverter 3 can convert at least one of the first AC power and the second AC power into the first DC power of the third voltage level based on the energy storage command energy, and use the first direct current energy to charge the energy storage battery 7 to realize the storage of direct current electric energy; the controller 5 is also used to send a discharge command to the inverter 3, and the inverter 3 can charge the energy storage battery The first DC power of the third voltage level stored in 7 is converted into at least one of the first AC power of the first voltage level and the second AC power of the second voltage level, so as to realize the feedback of AC power.

On the basis of any of the above-mentioned embodiments, the controller 5 can respectively establish a network connection with the grid access device 2 and the inverter 3 to perform data transmission with the grid access device 2 and the inverter 3, thereby controlling The inverter 5 can send commands to the grid access device 2 and the inverter 3 respectively through the network connection. Optionally, the network connection may be a mobile network, such as 3G, 4G, 5G, etc.

On the basis of any of the above-mentioned embodiments, the power exchange station 100 may also include a distributed communication device, which is used to realize communication between various devices in the power exchange station 100, which helps to shorten the wiring length in the power exchange station and improve the efficiency of the power exchange station. Communication quality, good scalability.

In describing the present disclosure, it is to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", "Axial" , "radial", "circumferential" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying the referred device or Elements must have certain orientations, be constructed and operate in certain orientations, and thus should not be construed as limitations on the present disclosure.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present disclosure, "plurality" means two or more, unless otherwise specifically defined.

In this disclosure, terms such as "installation", "connection", "connection" and "fixation" should be interpreted in a broad sense, for example, it can be a fixed connection or a detachable connection unless otherwise clearly defined and limited. , or integrated; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediary, and it can be the internal communication of two components or the interaction relationship between two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present disclosure according to specific situations.

In the present disclosure, unless otherwise clearly stated and limited, a first feature being "on" or "under" a second feature may mean that the first and second features are in direct contact, or that the first and second features are indirect through an intermediary. touch. Moreover, "above", "above" and "above" the first feature on the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. "Below", "beneath" and "beneath" the first feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is less horizontally than the second feature.

In the description of this specification, descriptions referring to the terms "one embodiment", "some embodiments", "example", "specific examples", or "some examples" mean that specific features described in connection with the embodiment or example , structure, material or characteristic is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the described specific features, structures, materials or characteristics may be combined in any suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples and features of different embodiments or examples described in this specification without conflicting with each other.

Although the embodiments of the present disclosure have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limitations on the present disclosure, and those skilled in the art can understand the above-mentioned embodiments within the scope of the present disclosure. The embodiments are subject to changes, modifications, substitutions and variations.

Claims

A power station, comprising:

A new energy generating device, the new energy generating device is used to convert new energy into a first AC power of a first voltage level, and output the first AC power;

A grid access device, the grid access device is used to receive the second AC power of the second voltage level from the power grid, and output the second AC power;

Inverters, the inverters are respectively electrically connected to the new energy generating device and the grid access device;

a replacement battery electrically connected to the inverter; and

a controller, the controller is configured to send a charging command to the inverter, and the inverter can convert at least one of the first AC power and the second AC power into the first DC power of the third voltage level, and use the first DC power to charge the replacement battery.
The switching station according to claim 1, wherein,

The controller is further configured to send an access instruction to the grid access device in response to detecting that a preset grid access condition is met, and the grid access device may establish a connection with the grid based on the access instruction. electrical connections; or,

The controller is further configured to send a disconnection instruction to the grid connection device in response to detecting that the preset grid connection condition is not currently met, and the grid connection device may disconnect the power grid based on the disconnection command. Open its own electrical connection to the grid.
The switching station according to claim 2, wherein the preset grid access conditions include at least one of the following:

The first alternating current electric energy is less than the required electric energy of the switching station;

The target parameter of the power grid is within a preset target value range.
The switching station according to claim 3, wherein the target parameter of the grid includes at least one of voltage, current and power.
The switching station according to claim 1, wherein the controller is further configured to send the charging instruction to the inverter in response to detecting that a preset charging condition is met.
The switching station according to claim 1, further comprising:

a cloud server, wherein the cloud server is configured to send the charging instruction to the controller in response to detecting that a preset charging condition is satisfied, and the controller feeds the charging instruction back to the inverter device.
The battery swapping station according to claim 5 or 6, wherein the preset charging conditions include at least one of the following:

The remaining power of any battery in the replacement station is less than the first preset threshold;

The accumulative waiting time of any equipment to be replaced in the switching station reaches the second preset threshold;

The remaining waiting time of any equipment to be replaced in the switching station is less than the third preset threshold;

The first AC power is greater than the demanded power of the switching station, and a difference between the first AC power and the demanded power is greater than a fourth preset threshold.
The substation according to any one of claims 1 to 5, wherein the new energy power generation device includes at least one of a photovoltaic power generation device and a wind power generation device.
The switching station according to any one of claims 1 to 5, wherein the inverter is a bidirectional energy storage converter.
The battery swapping station according to any one of claims 1 to 5, wherein the charging command carries at least one of identification information of the battery swapping battery, charging start time, charging end time, and charging power.
The switching station according to any one of claims 1 to 10, wherein,

The controller is also used to acquire identification information of the battery to be charged, and send the identification information to the inverter;

The inverter is further configured to determine the replacement battery to be charged based on the received identification information.
The switching station according to any one of claims 1 to 11, wherein,

The controller is further configured to be based on at least one of the remaining power of the replacement battery, the remaining waiting time of the equipment to be replaced, and the difference between the first AC power and the required power of the replacement station. In the first method, the charging power of the replacement battery is determined with the minimum charging power as the constraint condition.
The switching station according to any one of claims 1 to 12, wherein both the first voltage level and the second voltage level are greater than the third voltage level.
The switching station according to any one of claims 1 to 13, further comprising:

An energy storage battery, the energy storage battery is electrically connected to the inverter.
The switching station according to claim 14, wherein,

The controller is also used to send an energy storage instruction to the inverter;

The inverter is further configured to convert at least one of the first AC power and the second AC power into the first DC power of the third voltage level based on the energy storage command, and The energy storage battery is charged by using the first direct current electric energy.
The switching station according to claim 14, wherein,

The controller is also used to send a discharge command to the inverter;

The inverter is further configured to convert the first DC electric energy of the third voltage level stored in the energy storage battery into the first AC electric energy of the first voltage level and the first AC electric energy of the first voltage level based on a discharge instruction. at least one of the second AC power of the second voltage level, and feeding back the first AC power of the first voltage level and the second AC power of the second voltage level to The new energy power generation device and the grid access device.