Detection control framework and method for connecting generator with energy storage system

Abstract

The invention discloses a detection control framework and method for connecting a generator with an energy storage system. The framework comprises a change-over switch and a state detection module. The change-over switch is arranged at an alternating current interface of the energy storage inverter and is used for controlling the energy storage inverter to be connected with a power grid or a generator serving as a power supply; and the state detection module is suitable for identifying the working state of the power grid and / or the generator and feeding back the working state to the energy storage inverter, so that the energy storage inverter executes a corresponding working mode according to a received signal. According to the method, corresponding control is executed by using the architecture. The beneficial effects of the application are that through the arrangement of the state detection module, the working states of the power grid and the generator can be identified, so that the technical scheme of the application does not have special requirements on the change-over switch, and all change-over switch types can be satisfied. And the state detection module is simple in structure and easy to obtain, so that the system cost is relatively low.

Description

Technical Field

[0001] This application relates to the field of new energy power generation technology, and in particular to a detection and control architecture and method for a generator connected to an energy storage system. Background Technology

[0002] Due to the intermittency of photovoltaic power generation and the capacity limitations of energy storage systems, generators are typically connected to the photovoltaic-energy storage system to ensure the continuity and stability of power supply to critical loads. This allows the system to supply power to critical loads via the grid or sell excess electricity back to the grid. Because of the generator's operating characteristics, it cannot be connected to other power sources simultaneously, as this could lead to generator failure. Therefore, different operating modes need to be switched to meet the varying needs of the photovoltaic-energy storage system under different operating conditions.

[0003] For switching between different operating modes of a photovoltaic-storage system, manual switching can be used, or an Automatic Switching System (ATS) can be used to identify the operating status of the grid and generator and feed it back to the energy storage inverter for automatic switching. Manual switching introduces a mode switching delay; while automatic switching via ATS has certain requirements for the application scenario, which are difficult to meet in actual photovoltaic-storage system power supply scenarios. Therefore, ATS switches are not used in most relevant application scenarios. Summary of the Invention

[0004] One objective of this application is to provide a detection and control architecture for a generator-to-storage system that can solve at least one of the defects in the aforementioned background technology.

[0005] Another objective of this application is to provide a detection and control method for a generator-to-storage system that can solve at least one of the defects in the above-mentioned background art.

[0006] To achieve at least one of the above objectives, the technical solution adopted in this application is as follows: a detection and control architecture for a generator-to-energy storage system, including a transfer switch and a status detection module; the transfer switch is installed on the AC interface of the energy storage inverter and is used to control the energy storage inverter to connect with the power grid or generator as a power supply; the status detection module is adapted to identify the operating status of the power grid and / or the generator and feed it back to the energy storage inverter, and then the energy storage inverter executes the corresponding operating mode according to the received signal.

[0007] Preferably, the operating modes of the energy storage inverter include a generator mode (no external power supply) and a grid mode (external power supply); the identification scenarios of the state detection module include the grid being active while the generator is not active, the generator being active while the grid is not active, both the grid and the generator being not active, and both the grid and the generator being active; based on the identification scenarios of the state detection module, the energy storage inverter only executes the grid mode in the scenario where the generator is not active and the grid is active, and in all other scenarios, the energy storage inverter executes the generator mode.

[0008] Preferably, the status detection module employs a status detection device, the detection end of which is located on the power supply side of the power grid or the generator, and the feedback end of which is connected to the status detection input interface of the energy storage inverter; based on the status identification of the power grid or the generator by the status detection device, the energy storage inverter is controlled to execute the corresponding operating mode.

[0009] Preferably, the status detection module employs a status detection device, with the detection terminals of the status detection device respectively located on the power supply side of the power grid and the generator, and the feedback terminal of the status detection device connected to the status detection input interface of the energy storage inverter; based on the status identification of the power grid and the generator by the status detection device, the energy storage inverter is controlled to execute the corresponding operating mode.

[0010] Preferably, the status detection device is a power adapter, which is adapted to convert the AC power output from the power supply into DC power that is compatible with the operation of the status detection input interface.

[0011] Preferably, the status detection device is a DO device, and the energy storage inverter uses a DI circuit to identify the signal fed back from the status detection input interface; when the power supply is outputting, the DO device sends a DO signal representing the working status of the power supply to the status detection input interface.

[0012] Preferably, the DO device includes a data acquisition circuit and a DO signal generation circuit as a feedback terminal; a control switch is provided between the data acquisition circuit and the DO signal generation circuit; the data acquisition circuit drives the control switch to close when the power supply outputs, and then the DO signal generation circuit generates a DO signal according to the closing of the control switch.

[0013] Preferably, the control switch is AC driven; the acquisition circuit directly connects the control switch to the power supply side of the power source so that the control switch closes under the action of the AC power output from the power source; or, the control switch is DC driven; the acquisition circuit is adapted to convert the AC power output from the power source into DC power and drive the control switch to close using the DC power.

[0014] Preferably, the power supply terminal of the generator and / or the power grid is connected to the status detection input interface of the energy storage inverter; the status detection module is built into the energy storage inverter, and the status detection module is adapted to convert the AC power received by the status detection input interface into a DC signal that the energy storage inverter can recognize.

[0015] A detection and control method for a generator connected to an energy storage system, employing the aforementioned detection and control architecture for a generator connected to an energy storage system, includes the following steps: When the generator connection function is enabled, determine whether there is voltage at the AC interface of the energy storage inverter; if there is no voltage at the AC interface, the energy storage inverter enters off-grid mode and continuously detects the voltage; if there is voltage at the AC interface, the energy storage inverter acquires the output signal of the status detection module and determines whether a grid signal exists; if a grid signal exists, the energy storage inverter operates in grid mode; if no grid signal exists, continue to determine whether a generator signal exists; if a generator signal exists, the energy storage inverter operates in generator mode; if no generator signal exists, control the generator to shut down; after the generator shuts down, again determine whether there is voltage at the AC interface of the energy storage inverter; if there is voltage at the AC interface, the energy storage inverter operates in grid mode and issues a prompt "Grid status detection abnormal"; if there is no voltage at the AC interface, control the generator to start and operate in generator mode, while simultaneously issuing a prompt "Generator status detection abnormal".

[0016] Compared with the prior art, the beneficial effects of this application are as follows: By setting up a status detection module, the operating status of the power grid and generators can be identified, making the technical solution of this application have no special requirements for the transfer switch and accommodating all types of transfer switches. Furthermore, the status detection module has a simple structure and is easy to obtain, resulting in relatively low system cost. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the state detection module in this application, which simultaneously identifies the operating states of the power grid and the generator.

[0018] Figure 2 This is a schematic diagram of the structure of the state detection module in this application for identifying the working state of the power grid.

[0019] Figure 3 This is a schematic diagram of the structure of the state detection module in this application for identifying the working state of the generator.

[0020] Figure 4 This is a schematic diagram of the power adapter used in the state detection device of this application.

[0021] Figure 5 This is a schematic diagram of the state detection module in this application that uses AC drive for the control switch.

[0022] Figure 6 This is a schematic diagram of the state detection module in this application that uses DC drive to control the switch.

[0023] Figure 7 This is a schematic diagram of the detection and control process for connecting the generator to the energy storage system in the application.

[0024] In the diagram: Energy storage inverter 100, power grid 200, generator 300, transfer switch 400, status detection device 5, control switch 51. Detailed Implementation

[0025] The present application will now be further described in conjunction with specific embodiments. It should be noted that, in the description of this specification, the use of terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicates that the specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms should not be construed as necessarily referring to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0026] In the description of this application, it should be noted that the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., which indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and should not be construed as limiting the specific protection scope of this application.

[0027] It should be noted that the terms "first," "second," etc., in the specification and claims of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0028] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0029] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0030] The terms “comprising” and “having”, and any variations thereof, in the specification and claims of this application are intended to cover non-exclusive inclusion, for example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or device.

[0031] One aspect of this application provides a detection and control architecture for a generator-to-energy storage system, such as... Figures 1 to 3As shown, one preferred embodiment includes a transfer switch 400 and a status detection module. The transfer switch 400 is installed at the AC interface of the energy storage inverter 100 and is used to control the connection between the energy storage inverter 100 and the power grid 200 or the generator 300. Specifically, when the power grid 200 can provide normal power, the transfer switch 400 can connect the AC interface of the energy storage inverter 100 to the power grid 200, at which time the power grid 200 can provide power to the load. When the power grid 200 cannot provide normal power, the transfer switch 400 can connect the AC interface of the energy storage inverter 100 to the generator 300, at which time the generator 300 can provide power to the load. The status detection module can identify the operating status of the power grid 200 and / or the generator 300 and feed it back to the energy storage inverter 100, thereby enabling the energy storage inverter 100 to execute the corresponding operating mode based on the received signals.

[0032] It is understandable that there are various types of generators 300, with diesel generators being the most common. The operating characteristic of generator 300 is that it can only generate electricity and cannot absorb energy. Therefore, when generator 300 is connected to energy storage inverter 100, if energy storage inverter 100 supplies power to the grid, generator 300 may malfunction or be damaged under the power supply of energy storage inverter 100. Therefore, when generator 300 is operating, it is necessary to avoid energy storage inverter 100 supplying power to the outside, i.e., avoid selling electricity to the grid. In this case, the operating mode of energy storage inverter 100 can be defined as generator mode. Correspondingly, the operating mode in which energy storage inverter 100 can supply power to the outside is defined as grid mode.

[0033] Specifically, in a scenario where the grid 200 is not connected to the energy storage inverter 100, but the generator 300 is connected to the energy storage inverter 100 and is operating normally, the energy storage inverter 100 needs to operate in generator mode. That is, the energy storage inverter 100 can only supply power to the load and cannot supply power to external sources, while the generator 300 can also supply power to the load.

[0034] In a scenario where the energy storage inverter 100 is connected to the grid 200 and is operating, while the generator 300 is not connected to the energy storage inverter 100, the grid 200 and the generator 300 do not normally operate simultaneously. Therefore, only the grid 200 exists at this time. Consequently, the energy storage inverter 100 can operate in grid mode. That is, the energy storage inverter 100 can supply power to the load while simultaneously selling electricity to the grid 200, or the energy storage inverter 100 and the grid 200 can supply power to the load simultaneously, or the grid 200 can supply power to the load while simultaneously charging the energy storage system of the energy storage inverter 100.

[0035] In scenarios where the grid 200 and generator 300 are simultaneously connected to the energy storage inverter 100, the inverter 100 needs to operate in generator mode, as it may be connected to the generator 300. That is, the inverter 100 can only supply power to the load and cannot supply power to external systems. Of course, under normal circumstances, the grid 200 and generator 300 are not allowed to operate simultaneously. In this case, the transfer switch 400 can disconnect the grid 200 from the inverter 100.

[0036] In a scenario where neither the grid 200 nor the generator 300 is connected to the energy storage inverter 100, the presence of normal AC voltage at the inverter 100's AC interface suggests an abnormality in the detection of the grid 200 or generator 300's operating status. Since it's uncertain whether generator 300 is truly disconnected, the inverter 100 must also execute generator mode to protect it. This means the inverter 100 can only supply power to the load and cannot supply power to external systems.

[0037] For ease of understanding, the truth table for controlling the operating mode of the energy storage inverter 100 based on the identification results of the state detection module is shown below:

[0038] It's important to understand that "0" indicates that generator 300 and grid 200 are not connected, while "1" indicates that they are connected. "0" indicates that energy storage inverter 100 is in grid mode, and "1" indicates that it is in generator mode. As shown in the truth table above, energy storage inverter 100 only operates in grid mode when generator 300 is not working and grid 200 is working; in all other scenarios, it operates in generator mode.

[0039] As can be seen from the above analysis, in order to ensure accurate switching of the operating mode of the energy storage inverter 100, it is necessary to detect the operating status of the generator 300 and the power grid 200. The technical solution of this application, through the setting of a status detection module, can identify the operating status of the power grid 200 and the generator 300, thus making the technical solution of this application have no special requirements for the transfer switch 400 and can meet all types of transfer switches 400. Common types of transfer switches 400 include ATS switches, circuit breakers, relays, and manual switches, etc., and the transfer switch 400 in this embodiment can adopt any of the above types.

[0040] It should be noted that the structure of the state detection module is simple and easy to obtain, resulting in relatively low system cost. There are two main ways to configure the state detection module: external and internal. For ease of understanding, the following two examples will describe in detail the specific configuration methods of these two state detection modules.

[0041] Example 1: External status detection module.

[0042] In this embodiment, as Figures 1 to 3 As shown, the status detection module can use a status detection device 5. The detection end of the status detection device 5 is set on the power supply side of the grid 200 and / or the generator 300, and the feedback end of the status detection device 5 is connected to the status detection input interface of the energy storage inverter 100. Based on the identification of the working status of the grid 200 and / or the generator 300 by the status detection device 5, the energy storage inverter 100 is controlled to execute the corresponding working mode.

[0043] Specifically, such as Figure 1 As shown, when the detection terminal of the state detection device 5 is set on the power supply side of the power grid 200 and the generator 300, the state detection device 5 can simultaneously identify the operating status of the power grid 200 and the generator 300. Under the current operating mode of the state detection device 5, the energy storage inverter 100 can execute the corresponding operating mode with reference to the aforementioned truth table.

[0044] It should be noted that, for simultaneously detecting the operating status of the power grid 200 and the generator 300 through the detection terminals, one status detection device 5 can be equipped with two detection terminals; or there can be two status detection devices 5, with each device detecting the operating status of the power grid 200 and the generator 300 through its corresponding detection terminal. To simplify the structure of the status detection device 5, in this embodiment, it is preferable to use two status detection devices 5 to identify the operating status of the power grid 200 and the generator 300 respectively.

[0045] Specifically, such as Figure 2 As shown, when the detection terminal of the state detection device 5 is only set on the power supply side of the power grid 200, the state detection device 5 can only identify the working state of the power grid 200. Therefore, when the state detection device 5 detects that the power grid 200 is working, the energy storage inverter 100 can execute the grid mode according to the identification result; when the state detection device 5 detects that the power grid 200 is not working, the energy storage inverter 100 can execute the generator mode according to the identification result.

[0046] Specifically, such as Figure 3As shown, when the detection terminal of the state detection device 5 is only set on the power supply side of the generator 300, the state detection device 5 can only identify the operating status of the generator 300. Therefore, when the state detection device 5 detects that the generator 300 is working, the energy storage inverter 100 can execute the generator mode according to the identification result; when the state detection device 5 detects that the generator 300 is not working, the energy storage inverter 100 can execute the grid mode according to the identification result.

[0047] Understandably, compared to a scheme that uses two state detection devices 5 simultaneously to identify the operating status of the grid 200 or generator 300, the scheme using only one state detection device 5 reduces the number of state detection devices 5, thus lowering detection costs and complexity. However, this reduces safety and reliability; specifically, if a state detection device 5 fails, it cannot transmit a signal to the energy storage inverter 100, potentially leading to the energy storage inverter 100 supplying energy to the generator 300 while operating. In the scheme where two state detection devices 5 simultaneously identify the operating status of the grid 200 and generator 300, if one of them fails, the scheme can degenerate into one where only one state detection device 5 identifies the operating status of the grid 200 or generator 300, still ensuring the normal operation of the energy storage inverter 100. The specific scheme for identifying the operating status of the grid 200 and generator 300 using the state detection device 5 can be selected according to the actual needs of those skilled in the art.

[0048] In this embodiment, the state detection device 5, which can identify the working status of the power grid 200 and the generator 300, has various specific structures. For ease of understanding, two specific structures will be described in detail below.

[0049] Structure 1: such as Figure 4 As shown, the status detection device 5 uses a power adapter, which can convert the AC power output from the power supply into DC power that is compatible with the status detection input interface.

[0050] It should be noted that the specific structure and working principle of the power adapter are well-known to those skilled in the art, and therefore will not be described in detail here; the power adapter can be purchased directly from the market at a very low price. The power adapter connects its detection terminal (AC terminal) to the power supply side of the power source, and its feedback terminal (DC terminal) to the detection input interface of the energy storage inverter 100. The input voltage range of the power adapter depends on the region of application and should be based on local requirements; here, 220V is used as an example. The power adapter converts the 220V AC power output from the power source into 5~12V DC power compatible with the energy storage inverter 100 through its internal AC / DC conversion circuit.

[0051] Structure 2: such as Figure 5 and Figure 6 As shown, the status detection device 5 uses a DO device, and the energy storage inverter 100 uses a DI circuit to identify the signals fed back from the status detection input interface. When the power supply is outputting, the DO device sends a DO signal representing the operating status of the power supply to the status detection input interface.

[0052] It's important to understand that the DO device works as follows: when the generator 300 or the power grid 200 is operating, AC power is established. At this time, the DO device converts the input AC power into a DO signal output. The DO signal is a dry contact output, with no wiring sequence requirements, and can represent both on and off states. In this embodiment, the two states of the DO signal can be used to ensure the working and non-working states of the AC power supply, respectively; and the on state of the DO signal can be defined to indicate the working or non-working state of the power supply, and the off state of the DO signal can be defined to indicate the non-working or working state of the power supply, according to actual needs; the specific choice can be made by those skilled in the art based on their actual needs.

[0053] Understandably, to achieve the output of the DO signal, a control switch 51 is usually required. There are various types of control switches 51, commonly including relays and contactors. For the sake of clarity in the following description, the control switch 51 will be described using a relay as an example.

[0054] Specifically, such as Figure 5 and Figure 6As shown, the DO device includes a data acquisition circuit and a DO signal generation circuit as a feedback terminal; a control switch 51 is provided between the data acquisition circuit and the DO signal generation circuit; when the power supply outputs, the data acquisition circuit drives the control switch 51 to close, and then the DO signal generation circuit generates a DO signal according to the closure of the control switch 51. The specific driving method of the control switch 51 can be either DC drive or AC drive; the specific structure of the DO device differs depending on the driving method. For ease of understanding, the two driving methods of the control switch 51 will be explained below.

[0055] Regarding the AC drive method of control switch 51, such as Figure 5 As shown, the acquisition circuit can directly connect the electromagnetic coil of control switch 51 to the power supply side of the power source, and the contacts of control switch 51 are set in the DO signal generation circuit. When the power source is working, the AC power output by the power source can drive the electromagnetic coil to attract the contacts and close them. At this time, the DO signal generation circuit can be turned on according to the closure of the contacts of control switch 51 to generate a DO signal.

[0056] Regarding the DC drive method of control switch 51, such as Figure 6 As shown, the acquisition circuit includes an AC / DC conversion circuit and a control circuit. The AC / DC conversion circuit can be connected to the power supply side of the power source to convert the AC power output from the power source into a DC signal. The electromagnetic coil of the control switch 51 is located in the control circuit. The control circuit can receive the DC signal output from the AC / DC conversion circuit to control the electromagnetic coil to close the contacts of the DO signal generation circuit. At this time, the DO signal generation circuit can be turned on according to the closure of the contacts of the control switch 51 to generate a DO signal. The specific structure and working principle of the AC / DC conversion circuit and the control circuit are well known to those skilled in the art, and therefore will not be described in detail here.

[0057] Example 2: The status detection module is built-in.

[0058] In this embodiment, the power supply terminals of the generator 300 and / or the power grid 200 can be connected to the status detection input interface of the energy storage inverter 100. The status detection module is built into the energy storage inverter 100, and the status detection module can convert the AC power received by the status detection input interface into a DC signal that the energy storage inverter 100 can recognize.

[0059] It is understandable that there are various methods for the status detection module to convert the AC power output from the power supply into a DC signal. For example, a combination of a transformer and a rectifier circuit can be used, where the AC power is stepped down by the transformer and then rectified to convert it into a signal that the control unit inside the energy storage inverter 100 can directly recognize. Alternatively, a resistor voltage divider can be used to reduce the high voltage to a signal that the control unit inside the energy storage inverter 100 can directly recognize; or voltage sampling can be used to acquire the signal and transmit the acquired low-voltage signal to the control unit of the energy storage inverter 100. All of the above conversion methods can meet the actual needs of this application, and the specific method can be selected according to the actual needs of those skilled in the art.

[0060] Another aspect of this application provides a detection and control method for a generator connected to an energy storage system, employing the aforementioned detection and control architecture for a generator connected to an energy storage system, such as... Figure 7 As shown, one preferred embodiment includes the following steps: At the start of the test, it is first determined whether the generator connection function is enabled. If the generator connection function is enabled, the voltage of the AC interface of the energy storage inverter is detected to determine whether there is voltage. The grid connection and off-grid status of the energy storage inverter is identified based on the voltage detection of the AC interface.

[0061] If there is no voltage at the AC interface of the energy storage inverter, it means that the load is being powered through the generator unit (such as photovoltaic modules) and / or the energy storage module (such as lithium batteries), without the need for an external power source. In this case, the energy storage inverter can operate in off-grid mode and continuously monitor the voltage. In off-grid mode, both the generator and the grid are isolated from the energy storage inverter and cannot supply power to the load.

[0062] If the AC interface of the energy storage inverter has voltage, it indicates that an external power source is supplying power to the load. This means that both the grid and the generator may be connected to the inverter, necessitating a determination of their connection status. The energy storage inverter needs to acquire the output signal from the status detection module and determine if a grid signal is present. If a grid signal is present, it means the generator is not connected, and the inverter operates in grid mode. If no grid signal is present, it continues to check for a generator signal. If a generator signal is present, it means the generator is connected, and the inverter operates in generator mode. If no generator signal is present, and the grid signal was also absent in the previous step, but the AC interface of the inverter has voltage, it means at least one external power source is supplying power. However, the status detection module's detection of the external power source's operating status is malfunctioning. In this case, it is necessary to determine the external power supply status even if the status detection module is malfunctioning.

[0063] At this point, the generator can be shut down first. After the generator is shut down, check again whether there is voltage at the AC interface of the energy storage inverter. If there is voltage at the AC interface, it means that the generator is not supplying power to the load, that is, the voltage at the AC interface comes from the grid, but the grid's operating status is not detected. Therefore, the energy storage inverter can operate in grid mode and issue a "Grid status detection abnormal" prompt. If there is no voltage at the AC interface, it means that the voltage at the AC interface previously came from the generator, but the generator's operating status was not detected. Therefore, the generator should be restarted and the energy storage inverter should operate in generator mode, while issuing a "Generator status detection abnormal" prompt.

[0064] The basic principles, main features, and advantages of this application have been described above. Those skilled in the art should understand that this application is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this application. Various changes and modifications can be made to this application without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection claimed by this application is defined by the appended claims and their equivalents.

Claims

1. A detection control architecture for a generator interface energy storage system, comprising: The utility model relates to a kind of energy storage inverter, comprising: Switching device; The switching device is installed in the AC interface of energy storage inverter, for controlling the energy storage inverter and the power grid or generator as power supply are connected; And State detection module;The state detection module is suitable for identifying the working state of the power grid and / or the generator and feedback to the energy storage inverter, and then the energy storage inverter executes corresponding working mode according to the received signal.

2. The detection control architecture of a generator interface energy storage system as claimed in claim 1, wherein, The working mode of the energy storage inverter includes generator mode without external power supply and power grid mode with external power supply; The identification scene of the state detection module includes that the power grid works and the generator does not work, the generator works and the power grid does not work, the power grid and the generator do not work, and the power grid and the generator work; Based on the identification scene of the state detection module, only in the scene that the generator does not work and the power grid works, the energy storage inverter executes power grid mode, and the energy storage inverter executes generator mode in the remaining scenes.

3. The detection control architecture of a generator interface energy storage system as claimed in claim 2, wherein, The state detection module uses state detection device, and the detection end of the state detection device is arranged on the power supply side of the power grid or the generator, and the feedback end of the state detection device is connected to the state detection input interface of the energy storage inverter; According to the working state identification of the power grid or the generator by the state detection device, the energy storage inverter is controlled to execute corresponding working mode.

4. The detection control architecture of a generator interface energy storage system as claimed in claim 2, wherein, The state detection module uses state detection device, and the detection end of the state detection device is arranged on the power supply side of the power grid or the generator, and the feedback end of the state detection device is connected to the state detection input interface of the energy storage inverter; According to the working state identification of the power grid or the generator by the state detection device, the energy storage inverter is controlled to execute corresponding working mode.

5. The detection control architecture of a generator interface energy storage system as claimed in claim 3 or 4, wherein, The state detection device uses power adapter, and the power adapter is suitable for converting the AC power output by the power supply into DC power that meets the working requirements of the state detection input interface.

6. The detection control architecture of a generator interface energy storage system as claimed in claim 3 or 4, wherein, The state detection device uses DO device, and the energy storage inverter uses DI circuit to identify the signal feedback by the state detection input interface. The DO device sends DO signal representing the working state of the power supply to the state detection input interface when the power supply outputs.

7. The detection control architecture of a generator interface energy storage system as claimed in claim 6, wherein, The DO device includes acquisition circuit as detection end and DO signal generation circuit as feedback end. A control switch is arranged between the acquisition circuit and the DO signal generation circuit. The acquisition circuit drives the control switch to close when the power supply outputs, and then the DO signal generation circuit generates DO signal according to the closing of the control switch.

8. The detection control architecture of a generator interface energy storage system as claimed in claim 7, wherein, The control switch uses AC driving mode;The acquisition circuit directly connects the control switch with the power supply side of the power supply, so that the control switch is closed under the action of the AC power output by the power supply. Alternatively, the control switch uses DC driving mode;The acquisition circuit is suitable for converting the AC power output by the power supply into DC power, and drives the control switch to close through the DC power.

9. The detection control architecture of a generator interface energy storage system as claimed in claim 2, wherein, The power supply end of the generator and / or the power grid is connected with a state detection input interface of the energy storage inverter; The state detection module is built in the energy storage inverter, and the state detection module is adapted to convert the AC power received by the state detection input interface into a DC signal recognizable by the energy storage inverter.

10. A method for detection and control of a generator-to-energy storage system, using the detection and control architecture of any one of claims 1-9, wherein, The method comprises the following steps: In the case that the generator access function is turned on, it is judged whether there is voltage at the AC interface of the energy storage inverter; If there is no voltage at the AC interface, the energy storage inverter enters the off-grid mode and continuously detects the voltage; If there is voltage at the AC interface, the energy storage inverter acquires the output signal of the state detection module and judges whether there is grid signal; if there is grid signal, the energy storage inverter operates in the grid mode; if there is no grid signal, it is continuously judged whether there is generator signal; if there is generator signal, the energy storage inverter operates in the generator mode; if there is no generator signal, the generator is controlled to be turned off; After the generator is turned off, it is again judged whether there is voltage at the AC interface of the energy storage inverter; if there is voltage at the AC interface, the energy storage inverter operates in the grid mode and issues a prompt of "abnormal grid state detection"; if there is no voltage at the AC interface, the generator is controlled to be turned on and operates in the generator mode, and a prompt of "abnormal generator state detection" is issued.

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