Change-over switch, power equipment, distribution box, energy storage power supply system and power supply control method

Abstract

The invention provides a change-over switch, power equipment, a distribution box, an energy storage power supply system and a power supply control method.The change-over switch comprises a first processor, a controllable switch, a first sensor, a first port, a second port and a communication port, the first port is used for being connected with a power grid, and the second port is used for being connected with an alternating current output port of the power equipment; the first side of the controllable switch is electrically connected with the first port, the second side of the controllable switch is electrically connected with the second port, the first sensor is arranged between the first side of the controllable switch and the first port and used for detecting target electrical information, and the first processor is used for sending the target electrical information detected by the first sensor to the power equipment through the communication port. And receiving a first control instruction of the power equipment for the controllable switch through the communication port, and controlling the controllable switch to act according to a control action indicated by the first control instruction, so that the cost and the construction difficulty of a grid-connected and off-grid mode switching scheme of the power equipment can be greatly reduced.

Description

Technical Field

[0001] This application relates to the field of power electronics technology, and in particular to a switching switch, power equipment, distribution box, energy storage power supply system and power supply control method. Background Technology

[0002] In the process of supplying power to the load through power devices such as energy storage inverters, there are usually two modes: grid-connected mode and off-grid mode. In grid-connected mode, the power devices supply power to the load together with the grid. In off-grid mode, the power devices supply power to the load alone or in conjunction with other power generation devices such as generators.

[0003] Currently, to achieve the switching between grid-connected and off-grid modes, it is usually necessary to configure two separate output ports on the power equipment. The two output ports are used for power output in grid-connected mode and power output in off-grid mode, respectively. At the same time, the two output ports are connected to the distribution box through two independent power lines, which is costly and difficult to construct. Summary of the Invention

[0004] To address the aforementioned technical problems, this application provides a switching switch, power equipment, distribution box, energy storage power supply system, and power supply control method to solve the problems of high cost and difficult construction in existing power equipment grid-connected and off-grid switching schemes.

[0005] To achieve the above technical objectives, the embodiments of this application provide the following technical solutions: In a first aspect, embodiments of this specification provide a switching switch, including a first processor, a controllable switch, a first sensor, a first port, a second port, and a communication port; the first port is used to connect to the power grid, and the second port is used to connect to the AC output port of a power device; The first side of the controllable switch is electrically connected to the first port, and the second side of the controllable switch is electrically connected to the second port; The first sensor is disposed between the first side of the controllable switch and the first port, and is used to detect target electrical information; The communication port is used for communication connection with the power device; The first processor is configured to send the target electrical information detected by the first sensor to the power device through the communication port, and to receive a first control command from the power device for the controllable switch through the communication port, and to control the controllable switch to operate according to the control action indicated by the first control command; wherein the first control command is a control command generated by the power device based on the target electrical information detected by the first sensor.

[0006] In one embodiment, the switch further includes a second sensor; The second sensor is disposed between the second side of the controllable switch and the second port, and is used to detect target electrical information; The first processor is further configured to send the target electrical information detected by the second sensor to the power device through the communication port, so that the power device generates the first control command based on the target electrical information detected by the first sensor and the target electrical information detected by the second sensor; or, The first processor is specifically configured to: determine an execution action for the controllable switch based on the target electrical information detected by the first sensor, the target electrical information detected by the second sensor, and the control action indicated by the first control command, and control the controllable switch to operate according to the execution action.

[0007] In one implementation, an auxiliary power source circuit is also included; The auxiliary power source circuit includes an auxiliary power source input terminal, a conversion circuit, and an auxiliary power source output terminal. The auxiliary power input terminal is electrically connected to the first port and / or the second port; The conversion circuit is used to convert the AC power input at the auxiliary source input terminal into DC power and output it from the auxiliary source output terminal. The auxiliary power output terminal is electrically connected to the power supply port of the first processor.

[0008] In one embodiment, at least two of the auxiliary power circuits are included; Wherein, at least one of the auxiliary power source circuits has its auxiliary power source input terminal electrically connected to the first port; and at least one of the auxiliary power source circuits has its auxiliary power source input terminal electrically connected to the second port.

[0009] In one embodiment, a power output port is further included, which is electrically connected to the auxiliary power output terminal.

[0010] In one embodiment, a gating circuit is further included, through which the auxiliary source input terminal is electrically connected to the first port and the second port; The gating circuit includes a first gating input terminal, a second gating input terminal, a gating output terminal, and a gating control terminal. The first strobe input terminal is electrically connected to the first port, the second strobe input terminal is electrically connected to the second port, the strobe output terminal is electrically connected to the auxiliary source input terminal, and the strobe control terminal is electrically connected to either the first port or the second port. The gating circuit is used to connect the gating output terminal to the first gating input terminal, or connect the gating output terminal to the second gating input terminal, based on the relationship between the input voltage of the gating control terminal and the preset voltage.

[0011] In one embodiment, a DC power supply is also included, the output port of which is electrically connected to the power supply port of the first processor for supplying power to the first processor.

[0012] In one embodiment, a power input port is further included, which is electrically connected to the power supply port of the first processor, and the power input port is used to connect to a power supply.

[0013] In one embodiment, a current sensor and / or a current input port are further included, wherein the current sensor is disposed between the first side of the controllable switch and the first port for detecting current signals; The current input port is used to receive current signals detected by an external current sensor, including current signals flowing through the controllable switch and / or current signals from external devices.

[0014] In one embodiment, the controllable switch includes a controllable circuit breaker, which is used to disconnect when the target current is greater than a preset current, wherein the target current is the current flowing through the controllable circuit breaker.

[0015] In one embodiment, it further includes an instruction input module for receiving a second control instruction for the controllable switch that is manually triggered. The first processor is further configured to control the operation of the controllable switch according to the control action indicated by the second control instruction.

[0016] In one embodiment, a temperature sensor is also included for detecting a temperature signal within the switching switch; The first processor is also configured to control the controllable switch to open when the temperature signal detected by the temperature sensor is greater than a preset temperature.

[0017] In one implementation, the first processor is further configured to: The current on / off state of the controllable switch is obtained, and the current on / off state of the controllable switch is sent to the power device through the communication port, so that the power device can switch the control strategy or execute the safety protection strategy according to the current on / off state of the controllable switch.

[0018] Secondly, embodiments of this specification provide a power device for controlling the on / off state of a switching switch. The switching switch includes a first processor, a controllable switch, a first sensor, a first port, a second port, and a communication port. A first side of the controllable switch is electrically connected to the first port, and a second side of the controllable switch is electrically connected to the second port. The first sensor is disposed between the first side of the controllable switch and the first port and is used to detect target electrical information. The power device includes a second processor and an inverter circuit. The AC output port of the inverter circuit is electrically connected to the second port, and the first port is used to connect to the power grid. The second processor is communicatively connected to the first processor via the communication port, and the second processor is used for: Receive target electrical information detected by the first sensor and sent by the first processor; Based on the target electrical information detected by the first sensor, a first control command is generated for the controllable switch and sent to the first processor, so that the first processor controls the controllable switch to operate according to the control action indicated by the first control command.

[0019] In one embodiment, the switch further includes a second sensor, which is disposed between a second side of the controllable switch and the second port, for detecting target electrical information; The second processor is also used for: Receive target electrical information detected by the second sensor and sent by the first processor; The first control command is generated based on the target electrical information detected by the first sensor and the target electrical information detected by the second sensor.

[0020] In one implementation, the second processor is specifically used for: When the current operating mode of the power device is standby mode or off-grid mode, and the power device meets the grid connection conditions, the inverter circuit is controlled to adjust the output power based on the target electrical information detected by the first sensor, or simultaneously based on the target electrical information detected by the first sensor and the target electrical information detected by the second sensor. When the power output by the inverter circuit is consistent with the target electrical information detected by the first sensor, a first control command is generated indicating that the control action is a closed action.

[0021] In one implementation, the second processor is specifically used for: When the current operating mode of the power device is grid-connected, if the target electrical information detected by the first sensor indicates that the current voltage of the power grid exceeds the preset voltage range of the power grid, a first control command is generated indicating that the control action is a disconnection action.

[0022] In one embodiment, the second processor is further configured to: Receive the current on / off state of the controllable switch sent by the first processor; Based on the current on / off state of the controllable switch, the control strategy is switched, or a safety protection strategy is executed.

[0023] In one embodiment, an AC switch is further included, the AC switch being disposed between the AC output port of the inverter circuit and the second port; The second processor is specifically used for: After sending the first control command to the first processor, if the current on / off state of the controllable switch is consistent with the control action indicated by the first control command, the inverter circuit is controlled to operate based on the control strategy corresponding to the target operating mode, which is either off-grid mode or grid-connected mode. If the current on / off state of the controllable switch is inconsistent with the control action indicated by the first control command, and the control action indicated by the first control command is a disconnection action, then the AC switch is controlled to disconnect. If the current on / off state of the controllable switch is inconsistent with the first control command, and the control action indicated by the first control command is a closing action, then an alarm message is generated.

[0024] In one embodiment, the second processor is further configured to: If the inverter circuit is currently in grid-connected mode and the controllable switch is currently in open state when the first control command is not sent to the first processor, the inverter circuit is controlled to operate based on the control strategy corresponding to the off-grid mode.

[0025] Thirdly, embodiments of this specification provide a distribution box including a first circuit breaker, a second circuit breaker, and a switching switch as described in any of the above; Wherein, the first end of the first circuit breaker is electrically connected to the second port, and the second end of the first circuit breaker is used to connect to the load; The first end of the second circuit breaker is electrically connected to the first port, and the second end of the second circuit breaker is used to connect to the power grid.

[0026] In one embodiment, a third circuit breaker is further included, which is disposed between the AC output port of the power device and the second port.

[0027] Fourthly, embodiments of this specification provide an energy storage power supply system, including the power device as described in any of the preceding claims and the distribution box as described in any of the preceding claims; The power device's DC input port is used to electrically connect to the energy storage battery, the distribution box is electrically connected to the power device's AC output port, and the distribution box is also communicatively connected to the power device.

[0028] Fifthly, this specification provides a power supply control method applied to a switching switch, the method comprising: The target electrical information detected by the first sensor in the switching switch is sent to the power device; the first sensor is disposed between the first side of the controllable switch in the switching switch and the first port of the switching switch, the first side of the controllable switch is electrically connected to the first port of the switching switch, the second side of the controllable switch is electrically connected to the second port of the switching switch, the first port is used to connect to the power grid, and the second port is used to connect to the AC output port of the power device; The device receives a first control command from the power device for the controllable switch, and controls the controllable switch to operate according to the control action indicated by the first control command.

[0029] Sixthly, this specification provides another power supply control method applied to a power device. The power device controls the on / off state of a switching switch, which includes a first processor, a controllable switch, a first sensor, a first port, a second port, and a communication port. A first side of the controllable switch is electrically connected to the first port, and a second side of the controllable switch is electrically connected to the second port. The first sensor is disposed between the first side of the controllable switch and the first port, and is used to detect target electrical information. The AC output port of the power device is electrically connected to the second port, and the first port is used to connect to the power grid. The method includes: Receive target electrical information detected by the first sensor and sent by the first processor; Based on the target electrical information detected by the first sensor, a first control command is generated for the controllable switch and sent to the first processor, so that the first processor controls the controllable switch to operate according to the control action indicated by the first control command.

[0030] In a seventh aspect, embodiments of this specification provide a controller, including a memory, a processor, and a computer program stored in the memory and executed by the processor, wherein the processor executes the computer program to implement the power supply control method as described in any of the preceding claims.

[0031] As can be seen from the above technical solutions, the embodiments of this application provide a switching switch, a power device, a distribution box, an energy storage power supply system, and a power supply control method. The switching switch includes a first processor, a controllable switch, a first sensor, a first port, a second port, and a communication port. The first port is used to connect to the power grid, and the second port is used to connect to the AC output port of the power device. The first side of the controllable switch is electrically connected to the first port, and the second side of the controllable switch is electrically connected to the second port. The first sensor is disposed between the first side of the controllable switch and the first port and is used to detect target electrical information. The communication port is used to communicate with the power device. The first processor is used to send the target electrical information detected by the first sensor to the power device through the communication port, and to receive the first control command from the power device for the controllable switch through the communication port, and to control the controllable switch to operate according to the control action indicated by the first control command. The first control command is a control command generated by the power device based on the target electrical information detected by the first sensor. Therefore, it is only necessary to connect the switching switch between the AC side of the power device and the power grid, and the switching between the power device and the grid can be realized through the interaction between the switching switch and the power device, which greatly reduces the cost and construction difficulty of the power device grid-connected / off-grid mode switching scheme.

[0032] Furthermore, by integrating the target electrical information detection function into the switching switch and sending the target electrical information to the power equipment, the power equipment can issue the first control command for the controllable switch based on the target electrical information. This can effectively improve the integration of the switching switch and further reduce the cost and construction difficulty of the power equipment on-grid and off-grid mode switching scheme. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0034] Figure 1 This is a schematic diagram of an energy storage power supply system provided in the prior art.

[0035] Figure 2 This is a schematic diagram of the structure of a first type of switching switch provided for the implementation of this specification.

[0036] Figure 3 This is a schematic diagram of a second type of switch provided for implementation of this specification.

[0037] Figure 4 This is a schematic diagram of the structure of a third type of switching switch provided for the implementation of this specification.

[0038] Figure 5 This is a schematic diagram of the structure of a fourth type of switching switch provided for the implementation of this specification.

[0039] Figure 6 This is a schematic diagram of the fifth type of switch provided for the implementation of this specification.

[0040] Figure 7 This is a schematic diagram of the sixth type of switch provided for the implementation of this specification.

[0041] Figure 8 This is a schematic diagram of the structure of the seventh type of switch provided for the implementation of this specification.

[0042] Figure 9 This is a schematic diagram of the structure of the eighth type of switching switch provided for the implementation of this specification.

[0043] Figure 10 This is a schematic diagram of the structure of a power device provided for embodiments of this specification.

[0044] Figure 11 This is a schematic diagram of a distribution box provided for the implementation of this specification.

[0045] Figure 12 This is a schematic diagram of another distribution box provided for an embodiment of this specification.

[0046] Figure 13 This is a schematic diagram of the structure of a controller provided for the implementation of this specification. Detailed Implementation

[0047] Unless otherwise defined, the technical or scientific terms used in the embodiments of this specification shall have the ordinary meaning understood by one of ordinary skill in the art to which this specification pertains. The terms "first," "second," and similar terms used in the embodiments of this specification do not indicate any order, quantity, or importance, but are merely used to avoid confusion of constituent elements.

[0048] Unless the context otherwise requires, throughout this specification, "a plurality of" means "at least two," and "including" is interpreted as open-ended or encompassing, that is, "including, but not limited to." In the description of this specification, terms such as "one embodiment," "some embodiments," "exemplary embodiment," "example," "specific example," or "some examples" are intended to indicate that a particular feature, structure, material, or characteristic associated with that embodiment or example is included in at least one embodiment or example of this specification. The illustrative representations of the above terms do not necessarily refer to the same embodiment or example.

[0049] The technical solutions in the embodiments of this specification will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this specification, and not all embodiments. Based on the embodiments in this specification, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this specification.

[0050] As described in the background section, the process of supplying power to a load through power devices such as energy storage inverters typically includes grid-connected mode and off-grid mode. In grid-connected mode, the power devices supply power to the load together with the grid. In off-grid mode, the power devices supply power to the load either alone or in conjunction with other power generation devices such as generators. For example, if the grid voltage exceeds a preset voltage range (e.g., too high or too low), the power devices need to switch from grid-connected mode to off-grid mode. When the grid voltage returns to the preset range, the power devices need to switch from off-grid mode to grid-connected mode.

[0051] Currently, to achieve switching between grid-connected and off-grid modes, it is typically necessary to configure two separate output ports on the power equipment. These two output ports are used for power output in grid-connected mode and off-grid mode, respectively. Furthermore, the two output ports are connected to the distribution box via two independent power lines, resulting in high costs and significant construction difficulties. For example, the structure of existing energy storage power supply systems can be as follows: Figure 1 As shown, the energy storage power supply system includes a power device 101 and a distribution box 102. The power device 101 may include an inverter circuit 1011 and an AC switch K. AC The DC side of the inverter circuit 1011 is used for electrical connection with the DC power supply device 103 (e.g., photovoltaic module, energy storage battery, etc.), and the AC switch K AC Located on the AC side of inverter circuit 1011; a first power line 106 and a second power line 107 are provided between power device 101 and distribution box 102, and the first side of the first power line 106 and the first side of the second power line 107 are both connected to AC switch K. ACThe second side of the first power line 106 and the second side of the second power line 107 are both electrically connected to the first side of the distribution box 102. The second side of the distribution box 102 is used to connect to the power grid 104, and the third side of the distribution box 102 is used to connect to the load 105. The first side of the first power line 106 is connected to the AC switch K. AC A power transmission control switch K is installed between the second and third sides. C When the power grid 104 loses power, the power transmission control switch K is activated. C The circuit is disconnected, and electrical energy is transmitted through the second power line 107. When the power grid 104 resumes operation, the power transmission control switch K is controlled. C It is closed, and electrical energy is transmitted through the first power line 106.

[0052] The distribution box 102 is equipped with a first distribution switch K1, a second distribution switch K2, a third distribution switch K3, a fourth distribution switch K4, and a meter 1021. The first side of the first distribution switch K1 is connected to the first power line 106. The first side of the second distribution switch K2 is connected to the second power line 107. The first side of the third distribution switch K3 is connected to the connection point of the second side of the first distribution switch K1 and the second side of the second distribution switch K2. The second side of the third distribution switch K3 is used to connect to the load 105. The second side of the first distribution switch K1 is connected to the first side of the fourth distribution switch K4. The second side of the fourth distribution switch K4 is used to connect to the power grid 104. The meter 1021 is located between the second side of the first distribution switch K1 and the first side of the fourth distribution switch K4. The meter 1021 is communicatively connected to the power device 101. Since the distance between the power device 101 and the distribution box 102 is usually far, the power device 101 is connected to the distribution box 102 through two independent power lines, the first power line 106 and the second power line 107, which is costly and difficult to construct.

[0053] To address the high cost and complex construction issues of traditional switching schemes for grid-connected and off-grid modes of power device 101, this application proposes a switching switch comprising a first processor, a controllable switch, a first sensor, a first port, a second port, and a communication port. The first port is used to connect to the power grid 104, and the second port is used to connect to the AC output port of power device 101. The first side of the controllable switch is electrically connected to the first port, and the second side of the controllable switch is electrically connected to the second port. The first sensor is disposed between the first side of the controllable switch and the first port for detecting target electrical information. The communication port is used for communication connection with power device 101, and the first processor is used to process the data detected by the first sensor. The measured target electrical information is sent to the power device 101 through the communication port, and the power device 101 receives the first control command for the controllable switch through the communication port. The power device 101 controls the controllable switch to operate according to the control action indicated by the first control command. The first control command is a control command generated by the power device 101 based on the target electrical information detected by the first sensor. Therefore, it is only necessary to connect a switching switch between the AC side of the power device 101 and the power grid 104, and the switching between the power device 101 and the grid-connected mode can be realized through the interaction between the switching switch and the power device 101. This greatly reduces the cost and construction difficulty of the power device 101 grid-connected mode switching scheme.

[0054] Furthermore, by integrating the target electrical information detection function into the switching switch and sending the target electrical information to the power device 101, the power device 101 can issue a first control command for the controllable switch based on the target electrical information. This effectively improves the integration of the switching switch and further reduces the cost and construction difficulty of the power device 101's on-grid and off-grid mode switching scheme.

[0055] The following is an exemplary description of the switching switch, power device 101, distribution box 102, energy storage power supply system and power supply control method proposed in the embodiments of this application.

[0056] Reference Figure 2 This application first proposes a switching switch 108, including a first processor 201, a controllable switch 202, a first sensor 203, a first port 204, a second port 205, and a communication port 206; the first port 204 is used to connect to the power grid 104, and the second port 205 is used to connect to the AC output port of the power device 101. The first side of the controllable switch 202 is electrically connected to the first port 204, and the second side of the controllable switch 202 is electrically connected to the second port 205; The first sensor 203 is disposed between the first side of the controllable switch 202 and the first port 204, and is used to detect target electrical information; The communication port 206 is used for communication connection with the power device 101; The first processor 201 is configured to send the target electrical information detected by the first sensor 203 to the power device 101 through the communication port 206, and to receive a first control command from the power device 101 for the controllable switch 202 through the communication port 206, and to control the controllable switch 202 to operate according to the control action indicated by the first control command; wherein, the first control command is a control command generated by the power device 101 based on the target electrical information detected by the first sensor 203.

[0057] Specifically, the switching switch 108 may include a controllable switch 202, a first port 204, and a second port 205. The first port 204 is used for electrical connection to the power grid 104, and the second port 205 is used for electrical connection to the AC output port of the power device 101. The first side of the controllable switch 202 is electrically connected to the first port 204, and the second side of the controllable switch 202 is electrically connected to the second port 205. Thus, by controlling the on and off states of the controllable switch 202, the connection and disconnection between the power device 101 and the power grid 104 can be controlled, thereby enabling the power device 101 to switch its operating mode between grid-connected and off-grid modes. The controllable switch 202 may be a semiconductor switch such as an IGBT (Insulated Gate Bipolar Transistor), MOSFET, or thyristor, or a controllable circuit breaker. Alternatively, the controllable switch 202 may also be a single-pole double-throw switch, such as... Figure 3 As shown, at this time, the third side of the controllable switch 202 can be used to connect to a power generation device such as the generator 109. The controllable switch 202 can control the power device 101 to connect to the generator 109 or the power grid 104 to meet the needs of a microgrid scenario where the power device 101 and the generator simultaneously supply power to the load 105.

[0058] The switching switch 108 may further include a first sensor 203, which may be disposed between the first side of the controllable switch 202 and the first port 204 for detecting target electrical information of the first side of the controllable switch 202. This target electrical information may include the voltage of the first side of the controllable switch 202 (i.e., the power grid 104 side), and may also include the frequency and phase of the first side of the controllable switch 202. Optionally, the target electrical information detected by the first sensor 203 may include the voltage, frequency, and phase of the first side of the controllable switch 202. When the power device 101 is a three-phase device, the first sensor 203 may detect the voltage of each phase separately, or it may collect the voltage of only one phase, multiplexing the collected voltage for the other two phases. Simultaneously, the first sensor 203 may detect the voltage of the first side of the controllable switch 202 through methods such as resistor voltage division. The frequency and phase detected by the first sensor 203 can be obtained by converting the detected voltage. It is understood that the voltage of each phase needs to be detected independently. Furthermore, the first sensor 203 can also capture the zero-crossing point of the voltage through a capture circuit and send this zero-crossing point information as the phase of the first side of the controllable switch 202 to the power device 101. It is understood that considering the small phase difference between two adjacent zero-crossing points (for example, at a frequency of 50Hz, the phase difference between two adjacent zero-crossing points is only 10ms), a DO (Distributed Oscillator) method can be used to send the zero-crossing point information to the power device 101 through level inversion or pulse wave to ensure that the zero-crossing point information is sent to the power device 101 quickly and accurately. It is understood that if the power device 101 is a single-phase device, the zero-crossing point of that phase needs to be collected; if the power device 101 is a three-phase device, the zero-crossing points of at least two phases need to be collected.

[0059] The switch 108 may also include a communication port 206, through which the switch 108 can communicate with the power device 101 for data and command exchange. The specific communication connection method can be configured according to actual needs; for example, it can be wired communication such as DO, RS485, CAN line, or Ethernet, or wireless communication such as WIFI or Bluetooth.

[0060] The first processor 201 can be electrically connected to the control terminal of the controllable switch 202, the first sensor 203, and the communication port 206 to receive target electrical information detected by the first sensor 203 and transmit the target electrical information detected by the first sensor 203 to the power device 101 through the communication port 206. Simultaneously, the first processor 201 can also receive a first control command from the power device 101 for the controllable switch 202 through the communication port 206, and control the controllable switch 202 to operate according to the control action indicated by the first control command. The control action indicated by the first control command can include closing and opening actions. The power device 101 can generate the first control command for the controllable switch 202 based on the target electrical information detected by the first sensor 203. For example, if the target electrical information detected by the first sensor 203 indicates an abnormal voltage in the power grid 104, such as when the voltage on the first side of the controllable switch 202 exceeds the preset voltage range of the power grid 104, the control action indicated by the first control command generated by the power device 101 for the controllable switch 202 can be a disconnection action, so that the power device 101 switches from grid-connected mode to off-grid mode; if the target electrical information detected by the first sensor 203 indicates that the voltage in the power grid 104 returns to normal, such as when the voltage on the first side of the controllable switch 202 is within the preset voltage range of the power grid 104, the control action indicated by the first control command generated by the power device 101 for the controllable switch 202 can be a closing action, so that the power device 101 switches from off-grid mode to grid-connected mode.

[0061] Therefore, through the solution of this application embodiment, it is only necessary to connect the switching switch 108 between the AC side of the power device 101 and the power grid 104, and the switching of the power device 101 between the grid and off-grid modes can be realized through the interaction between the switching switch 108 and the power device 101. There is no need to set up two independent power lines, which greatly reduces the cost and construction difficulty of the power device 101 grid-connected / off-grid mode switching solution.

[0062] Furthermore, by integrating the target electrical information detection function into the switching switch 108 and sending the target electrical information to the power device 101, the power device 101 can issue a first control command to the controllable switch 202 based on the target electrical information. This effectively improves the integration of the switching switch 108 and further reduces the cost and construction difficulty of the power device 101's on-grid and off-grid mode switching scheme.

[0063] In some embodiments, reference Figure 4 The switching switch 108 also includes a second sensor 207; The second sensor 207 is disposed between the second side of the controllable switch 202 and the second port 205, and is used to detect target electrical information; The first processor 201 is further configured to send the target electrical information detected by the second sensor 207 to the power device 101 through the communication port 206, so that the power device 101 generates the first control command based on the target electrical information detected by the first sensor 203 and the target electrical information detected by the second sensor 207. or, The first processor 201 is specifically configured to: determine the execution action for the controllable switch 202 based on the target electrical information detected by the first sensor 203, the target electrical information detected by the second sensor 207, and the control action indicated by the first control command, and control the controllable switch 202 to operate according to the execution action.

[0064] Specifically, the switch 108 may further include a second sensor 207, which may be disposed between the second side of the controllable switch 202 and the second port 205 for detecting target electrical information of the second side of the controllable switch 202. This target electrical information may include the phase of the second side of the controllable switch 202 (i.e., the power device 101 side), and may also include the voltage and / or frequency of the second side of the controllable switch 202, which can be configured according to actual needs. Optionally, the target electrical information detected by the second sensor 207 may only include the phase of the second side of the controllable switch 202 to reduce the cost and size of the switch 108.

[0065] The first processor 201 can also be electrically connected to the second sensor 207 to receive the target electrical information detected by the second sensor 207, and send the target electrical information detected by the second sensor 207 to the power device 101 through the communication port 206. Thus, the power device 101 can generate a first control command for the controllable switch 202 based on the target electrical information detected by the first sensor 203 and the target electrical information detected by the second sensor 207. For example, when the current operating mode of power device 101 is standby mode or off-grid mode, when power device 101 determines that the grid connection conditions are met based on the target electrical information detected by the first sensor 203, it can adjust its output according to the target electrical information detected by the first sensor 203 and the target electrical information detected by the second sensor 207. When the target electrical information detected by the first sensor 203 and the target electrical information detected by the second sensor 207 are consistent, a first control command indicating a closed-loop control action is generated. Thus, when the output phase sequence of power device 101 is inconsistent with the phase sequence of the grid 104 side of controllable switch 202, the output phase sequence can be adjusted by simultaneously referencing the target electrical information detected by the first sensor 203. The controllable switch 202 is controlled by the target electrical information detected by the second sensor 207, ensuring reliable control of the controllable switch 202. When the current operating mode of the power device 101 is grid-connected, the power device 101 can generate a first control command indicating a disconnection action when it is determined that the grid connection conditions are not met based on the target electrical information detected by the first sensor 203 and the target electrical information detected by the second sensor 207, so as to ensure reliable control of the controllable switch 202. At the same time, the power device 101 can also adjust its output according to the target electrical information detected by the second sensor 207 and the output requirements of the power device 101 in off-grid mode, thereby ensuring the effective operation of the power device 101.

[0066] Optionally, the first processor 201 can also obtain the difference between the phase detected by the first sensor 203 and the phase detected by the second sensor 207, and use this difference as the phase difference between the grid 104 side and the power device 101 side of the controllable switch 202. The voltage, frequency and phase difference detected by the first sensor 203 are sent to the power device 101 via RS485 or other means, so that the power device 101 can quickly and effectively adjust its output according to the phase difference when switching from off-grid mode to grid-connected mode. Taking the power device 101 as a single-phase device as an example, the zero-crossing times T1 and T2 of the controllable switch 202 on the grid 104 side and the power device 101 side can be obtained respectively, and the time difference between them ΔT=T1-T2 can be calculated. Two consecutive zero crossings constitute one half-wave period T. Therefore, the phase difference between the controllable switch 202 on the grid 104 side and the power device 101 side can be obtained according to (ΔT / T)*180°. For example, at a frequency of 50Hz, the half-wave period is 10ms. If ΔT is 5ms, then the phase difference is 90°.

[0067] In addition, after receiving the first control command, the first processor 201 can also determine the execution action for the controllable switch 202 based on the target electrical information detected by the first sensor 203, the target electrical information detected by the second sensor 207, and the control action indicated by the first control command, and control the controllable switch 202 to operate according to the execution action of the controllable switch 202. For example, when the control action indicated by the first control command is a closing action, the first processor 201 can determine that the execution action for the controllable switch 202 is a closing action when the target electrical information detected by the first sensor 203 is consistent with the target electrical information detected by the second sensor 207, so as to ensure reliable control of the controllable switch 202. When the action indicated by the first control command is an opening action, the first processor 201 can directly determine that the execution action for the controllable switch 202 is an opening action, or it can determine that the execution action for the controllable switch 202 is an opening action when the target electrical information detected by the first sensor 203 is inconsistent with the target electrical information detected by the second sensor 207. Thus, when the output phase sequence of the power device 101 is inconsistent with the phase sequence of the power grid 104 side of the controllable switch 202, by simultaneously referring to the target electrical information detected by the first sensor 203 and the target electrical information detected by the second sensor 207 to control the controllable switch 202, reliable control of the controllable switch 202 can be ensured.

[0068] In some embodiments, reference Figure 4 It also includes auxiliary power supply circuit 208; The auxiliary power source circuit 208 includes an auxiliary power source input terminal, a conversion circuit, and an auxiliary power source output terminal. The auxiliary power input terminal is electrically connected to the first port 204 and / or the second port 205; The conversion circuit is used to convert the AC power input at the auxiliary source input terminal into DC power and output it from the auxiliary source output terminal. The auxiliary power output terminal is electrically connected to the power supply port of the first processor 201.

[0069] Specifically, the switch 108 may further include an auxiliary power supply circuit 208, which can be used to power the first processor 201. The auxiliary power supply circuit 208 may include an auxiliary power supply input terminal, a conversion circuit, and an auxiliary power supply output terminal, which are connected in sequence. The auxiliary power supply input terminal can be used to input AC power, and the conversion circuit is used to convert the AC power input to DC power and output it from the auxiliary power supply output terminal. The auxiliary power supply output terminal can be electrically connected to the power supply port of the first processor 201 to power the first processor 201 through the DC power output from the auxiliary power supply output terminal.

[0070] The conversion circuit may include a rectifier, with a first side electrically connected to the auxiliary power input terminal and a second side electrically connected to the auxiliary power output terminal, so as to convert the AC power input from the auxiliary power input terminal into DC power through the rectifier. The conversion circuit may also include a filter circuit and / or a voltage regulator circuit connected in series between the second side of the rectifier and the auxiliary power output terminal to ensure the power supply stability of the first processor 201.

[0071] The auxiliary power input terminal can be electrically connected to the first port 204 of the switch 108 to draw power from the power grid 104 side of the controllable switch 202 through the auxiliary power circuit 208 to supply power to the first processor 201. Thus, when the power grid 104 is energized, the first processor 201 can be self-powered, thereby ensuring the effective operation of the first processor 201 and further improving the integration of the switch 108.

[0072] The auxiliary power input terminal can also be electrically connected to the second port 205 of the switch 108 to draw power from the power device 101 side of the controllable switch 202 through the auxiliary power circuit 208 to power the first processor 201. Thus, when the power device 101 is powered, the first processor 201 can be self-powered, thereby ensuring the effective operation of the first processor 201 and further improving the integration of the switch 108.

[0073] The auxiliary power input terminal can also be electrically connected to the first port 204 and the second port 205 of the switch 108 simultaneously, so as to draw power from the grid 104 side or the power device 101 side of the controllable switch 202 through the auxiliary power circuit 208 to power the first processor 201. For example, power can be drawn from the side with power, whichever side of the controllable switch 202, the grid 104 side or the power device 101 side, to power the first processor 201. When both the grid 104 side and the power device 101 side of the controllable switch 202 are powered, power can be drawn from the side with higher priority, whichever side of the controllable switch 202, to power the first processor 201. Thus, the first processor 201 can be self-powered when either the grid 104 side or the power device 101 side of the controllable switch 202 is powered, thereby ensuring the effective operation of the first processor 201 and further improving the integration of the switch 108.

[0074] It should be noted that, Figure 4 The diagram only shows the auxiliary power input terminal electrically connected to the first port 204.

[0075] In some embodiments, reference Figure 5 This includes at least two of the auxiliary power circuits 208; Wherein, at least one of the auxiliary power source circuits 208 has its auxiliary power source input terminal electrically connected to the first port 204; and at least one of the auxiliary power source circuits 208 has its auxiliary power source input terminal electrically connected to the second port 205.

[0076] Specifically, the switch 108 may include at least two auxiliary power circuits 208, and the auxiliary power output terminal of each auxiliary power circuit 208 is electrically connected to the power supply port of the first processor 201. At least one auxiliary power circuit 208 has its auxiliary power input terminal electrically connected to the first port 204 of the switch 108, so as to draw power from the power grid 104 side of the controllable switch 202 to supply power to the first processor 201. Simultaneously, at least one auxiliary power circuit 208 has its auxiliary power input terminal electrically connected to the second port 205 of the switch 108, so as to draw power from the power device 101 side of the controllable switch 202 to supply power to the first processor 201.

[0077] Therefore, through the solution of this application embodiment, the first processor 201 can be self-powered when either the power grid 104 side or the power device 101 side of the controllable switch 202 is powered, thereby ensuring the effective operation of the first processor 201 and further improving the integration of the switching switch 108.

[0078] As an optional implementation, the switch 108 may include an auxiliary power supply circuit 208. The auxiliary power supply input terminal of the auxiliary power supply circuit 208 is electrically connected to the first port 204, and the auxiliary power supply output terminal of the auxiliary power supply circuit 208 is electrically connected to the power supply port of the first processor 201. The auxiliary power supply circuit 208 draws power from the power grid 104 side of the controllable switch 202 to supply power to the first processor 201, thereby reducing the cost and size of the switch 108. At the same time, when the power grid 104 is energized, the effective power supply of the switch 108 can be guaranteed, thereby ensuring that the first processor 201 sends the target electrical information detected by the first processor 201 to the power device 101, and thus effectively controls the closing of the controllable switch 202.

[0079] In some embodiments, reference Figure 5 It also includes a power output port 209, which is electrically connected to the auxiliary power output port.

[0080] Specifically, the switch 108 may also include a power output port 209, which can be electrically connected to an auxiliary power output terminal to supply power to the outside, thereby effectively meeting the application scenarios that require external power supply and improving the applicability of the switch 108.

[0081] It is understood that when the switch 108 includes multiple auxiliary power circuits 208, the switch 108 may include multiple power output ports 209 that are connected one-to-one with the auxiliary power output terminals of the multiple auxiliary power circuits 208, and may also include one or more power output ports 209 that are connected one-to-one with the auxiliary power output terminals of some of the auxiliary power circuits 208.

[0082] In some embodiments, reference Figure 6 It also includes a gating circuit 210, through which the auxiliary source input terminal is electrically connected to the first port 204 and the second port 205; The gating circuit 210 includes a first gating input terminal, a second gating input terminal, a gating output terminal, and a gating control terminal. The first strobe input terminal is electrically connected to the first port 204, the second strobe input terminal is electrically connected to the second port 205, the strobe output terminal is electrically connected to the auxiliary source input terminal, and the strobe control terminal is electrically connected to the first port 204 or the second port 205. The gating circuit 210 is used to connect the gating output terminal to the first gating input terminal, or connect the gating output terminal to the second gating input terminal, based on the relationship between the input voltage of the gating control terminal and the preset voltage.

[0083] Specifically, the switching switch 108 may also include a gating circuit 210, which may include a first gating input terminal, a second gating input terminal, a gating output terminal, and a gating control terminal.

[0084] The auxiliary power supply circuit 208 can be electrically connected to the auxiliary power supply input of the auxiliary power supply circuit 208. The first auxiliary power supply input can be electrically connected to the first port 204 of the switch 108. Thus, when the first auxiliary power supply input and the auxiliary power supply output are connected, the auxiliary power supply circuit 208 can draw power from the power grid 104 side of the controllable switch 202 to supply power to the first processor 201. The second auxiliary power supply input can be electrically connected to the second port 205 of the switch 108. Thus, when the second auxiliary power supply input and the auxiliary power supply output are connected, the auxiliary power supply circuit 208 can draw power from the power device 101 side of the controllable switch 202 to supply power to the first processor 201.

[0085] The gating control terminal can be electrically connected to either the first port 204 or the second port 205 of the switch 108 to receive the voltage provided by the target port of the first port 204 or the second port 205. The target port can be the port of the first port 204 or the second port 205 that is electrically connected to the gating control terminal. Thus, the gating output terminal can be connected to the first gating input terminal, or the gating output terminal can be connected to the second gating input terminal, by the relationship between the input voltage of the gating control terminal and the preset voltage.

[0086] For example, when the gating control terminal is electrically connected to the first port 204, the gating output terminal can be connected to the first gating input terminal when the input voltage of the gating control terminal is greater than or equal to a preset voltage, and the gating output terminal can be connected to the second gating input terminal when the input voltage of the gating control terminal is less than the preset voltage. This allows the first processor 201 to be powered preferentially by drawing power from the power grid 104 side of the controllable switch 202 via the auxiliary power supply circuit 208 when power is available on the grid 104 side of the controllable switch 202. Similarly, when the gating control terminal is electrically connected to the second port 205, the gating output terminal can be connected to the second gating input terminal when the input voltage of the gating control terminal is greater than or equal to a preset voltage, and the gating output terminal can be connected to the first gating input terminal when the input voltage of the gating control terminal is less than the preset voltage. This allows the first processor 201 to be powered preferentially by drawing power from the power device 101 side of the controllable switch 202 via the auxiliary power supply circuit 208 when power is available on the power device 101 side of the controllable switch 202.

[0087] Optionally, the selection circuit 210 may include a switch module, which may include a switch (e.g., a positive switch and a negative switch) disposed between the first port 204 and the auxiliary power input terminal of the auxiliary power circuit 208, and a switch (e.g., a positive switch and a negative switch) disposed between the second port 205 and the auxiliary power input terminal of the auxiliary power circuit 208. The switch module may also include a single-pole double-throw relay (e.g., a positive single-pole double-throw relay and a negative single-pole double-throw relay), which can be configured according to actual needs.

[0088] Therefore, through the solution of this application embodiment, only one auxiliary power supply circuit 208 is needed to realize the self-powering of the first processor 201 when there is power on either the power grid 104 side or the power device 101 side of the controllable switch 202, thereby ensuring the effective operation of the first processor 201 and reducing the cost and size of the switching switch 108.

[0089] In some embodiments, reference Figure 7 It also includes a DC power supply 211, the output port of which is electrically connected to the power supply port of the first processor 201 for supplying power to the first processor 201.

[0090] Specifically, the switching switch 108 may also include a DC power supply 211. The output port of the DC power supply 211 can be electrically connected to the power supply port of the first processor 201 to supply power to the first processor 201. The DC power supply 211 may be a supercapacitor or a storage battery, etc.

[0091] The switching switch 108 may include only a DC power supply 211, excluding the auxiliary power supply circuit 208, so that the DC power supply 211 supplies power to the first processor 201 during the operation of the switching switch 108, thereby ensuring the effective operation of the first processor 201. Alternatively, the switching switch 108 may also include both the auxiliary power supply circuit 208 and the DC power supply 211. Thus, when the auxiliary power supply circuit 208 can supply power to the first processor 201, it can be prioritized to supply power to the first processor 201. When the auxiliary power supply circuit 208 cannot supply power to the first processor 201, the DC power supply 211 supplies power to the first processor 201. This ensures that the power supply needs of the first processor 201 are still met during low-voltage ride-through, when the power grid 104 fails, or when the power device 101 has no power output. This, in turn, supports data interaction between the first processor 201 and the power device 101 and the disconnection of the controllable switch 202, thereby ensuring the effective switching of the operating mode of the power device 101.

[0092] In some embodiments, reference Figure 8 It also includes a power input port 212, which is electrically connected to the power supply port of the first processor 201. The power input port 212 is used to connect to a power supply.

[0093] Specifically, the switch 108 may also include a power input port 212, which can be electrically connected to the power supply port of the first processor 201. The power input port 212 can be used to connect a power supply. Thus, when the power supply is connected to the power input port 212, the first processor 201 can be powered by the power supply. In the event that the auxiliary power supply circuit 208 and the DC power supply 211 inside the switch 108 cannot power the first processor 201, the power supply can still be connected through the power input port 212, thereby effectively meeting the power supply requirements of the first processor 201.

[0094] In some embodiments, reference Figure 9 It also includes a current sensor 213 and / or a current input port 214, wherein the current sensor 213 is disposed between the first side of the controllable switch 202 and the first port 204, and is used to detect current signals; The current input port 214 is used to receive the current signal detected by an external current sensor. The current signal detected by the external current sensor includes the current signal flowing through the controllable switch 202 and / or the current signal of an external device.

[0095] Specifically, the switching switch 108 may also include a current sensor 213, which is disposed between the first side of the controllable switch 202 and the first port 204, for detecting the current signal on the power grid 104 side of the controllable switch 202. It is understood that when the power device 101 is a three-phase device, the current sensor 213 can detect the current signal of each phase.

[0096] The first processor 201 can also be electrically connected to the current sensor 213 to receive the current signal detected by the current sensor 213 and send the current signal detected by the current sensor 213 to the power device 101 through the communication port 206. The power device 101 can determine the output power of the power grid 104 based on the current signal detected by the current sensor 213, thereby integrating the power metering function in the switching switch 108 without the need to install metering devices such as the electricity meter 1021, further reducing the construction difficulty and cost.

[0097] The switching switch 108 may also include a current input port 214, which can be used to receive a current signal detected by an external current sensor. The current signal detected by the external current sensor may include a current signal flowing through the controllable switch 202 and / or a current signal from an external device. The external device may include other power devices 101 besides the power device 101 connected to the switching switch 108.

[0098] The first processor 201 can also be electrically connected to the current input port 214 to receive the current signal detected by the external current sensor through the current input port 214. The first processor 201 can send the current signal detected by the external current sensor to the power device 101 through the communication port 206. The power device 101 can determine the output power of the grid 104 based on the current signal flowing through the controllable switch 202, thereby integrating the power metering function into the switching switch 108 without the need to install metering devices such as the electricity meter 1021, further reducing the construction difficulty and cost. In addition, the power device 101 can adjust its own output according to the current signal of the external device to achieve grid connection with the external device, further improving the integration of the switching switch 108.

[0099] In some embodiments, the controllable switch 202 includes a controllable circuit breaker, which is used to disconnect when the target current is greater than a preset current, wherein the target current is the current flowing through the controllable circuit breaker.

[0100] Specifically, the controllable switch 202 can be a controllable circuit breaker. The controllable circuit breaker can determine that there is an overcurrent abnormality and disconnect when the current flowing through it is greater than the preset current, so as to realize overcurrent protection or short circuit protection, thereby ensuring the safe grid connection of the power equipment 101.

[0101] The controllable circuit breaker can integrate a trip unit, which can be activated when the current flowing through it is greater than the preset current, causing the controllable circuit breaker to trip and disconnect the power device 101 from the power grid 104. This allows for the integration of safety protection functions into the switching switch 108, further improving the integration of the switching switch 108. At the same time, the distribution box 102 no longer needs to have a circuit breaker connected between the AC output port of the power device 101 and the second port 205, thereby reducing the hardware cost and size of the distribution box 102.

[0102] In some embodiments, the system further includes an instruction input module for receiving a second control instruction triggered manually for the controllable switch 202; The first processor 201 is also configured to control the operation of the controllable switch 202 according to the control action indicated by the second control instruction.

[0103] Specifically, the switch 108 may also include a command input module, which is used to receive a second control command triggered manually for the controllable switch 202. The command input module may include one or more devices such as buttons, knobs, touchscreens, switches, voice input devices, gesture recognition devices, and remote controls.

[0104] The first processor 201 can also communicate with the instruction input module. For example, it can communicate with the instruction input module via wired communication methods such as RS485, CAN line or Ethernet, or via wireless communication methods such as WIFI or Bluetooth.

[0105] The first processor 201 can also control the controllable switch 202 to operate according to the control action indicated by the second control instruction. The control action indicated by the second control instruction can include closing and opening actions. When the first processor 201 receives both the first and second control instructions simultaneously, it can control the controllable switch 202 to operate according to the priority of the first and second control instructions. For example, the priority of the second control instruction can be higher than that of the first control instruction. This allows for flexible control of the controllable switch 202 according to the control needs of relevant personnel, further improving the applicability of the switch 108.

[0106] In some embodiments, a temperature sensor is also included for detecting a temperature signal within the switching switch 108; The first processor 201 is also configured to control the controllable switch 202 to open when the temperature signal detected by the temperature sensor is greater than a preset temperature.

[0107] Specifically, the switch 108 may also include a temperature sensor, which is used to detect the temperature inside the switch 108. The type of temperature sensor can be set according to actual needs, such as a thermistor temperature sensor, a platinum resistance temperature sensor, or a digital temperature sensor.

[0108] The first processor 201 can also be electrically connected to a temperature sensor to receive the temperature signal detected by the temperature sensor, and when the temperature signal detected by the temperature sensor indicates that the internal temperature of the switching switch 108 is greater than the preset temperature, it controls the controllable switch 202 to disconnect, so as to ensure the safe grid connection of the power device 101.

[0109] In some embodiments, the first processor 201 is further configured to: The current on / off state of the controllable switch 202 is obtained, and the current on / off state of the controllable switch 202 is sent to the power device 101 through the communication port 206, so that the power device 101 can switch the control strategy or execute the safety protection strategy according to the current on / off state of the controllable switch 202.

[0110] Specifically, the first processor 201 is also used to acquire the current on / off state of the controllable switch 202 and send the current on / off state of the controllable switch 202 to the power device 101 through the communication port 206. The controllable switch 202 may have auxiliary measuring points. The first processor 201 can detect the on / off state of the controllable switch 202 through the auxiliary measuring points and send the current on / off state of the controllable switch 202 to the power device 101 via DO. In addition, the first processor 201 can also determine the on / off state of the controllable switch 202 based on the current flowing through the controllable switch 202. For example, if the absolute value of the current flowing through the controllable switch 202 is greater than or equal to a preset current, the controllable switch 202 is determined to be in a closed state; if the absolute value of the current flowing through the controllable switch 202 is less than the preset current, the controllable switch 202 is determined to be in an open state.

[0111] On the one hand, after sending the first control command to the first processor 201, the power device 101 can determine whether the controllable switch 202 should execute the control action indicated by the first control command based on the current on / off state of the controllable switch 202 fed back by the first processor 201. If the controllable switch 202 does not execute the control action indicated by the first control command, a safety protection strategy can be implemented, such as generating an alarm message or controlling the AC switch K in the power device 101. AC Disconnection, etc., can ensure the reliable operation of power device 101.

[0112] On the other hand, when the power device 101 does not send the first control command to the first processor 201, it can switch its own control strategy according to the current on / off state of the controllable switch 202. Thus, in cases such as when the controllable switch 202 is manually switched, when the controllable switch 202 is automatically disconnected due to overcurrent or other reasons, or when the first processor 201 controls the controllable switch 202 to disconnect due to abnormal internal temperature of the switching switch 108, the power device 101 can be triggered to switch its control strategy in a timely manner, thereby ensuring the safe and reliable operation of the power device 101.

[0113] It is understandable that the current on / off status of the controllable switch 202 can also be displayed in real time through indicating devices (such as indicator lights, displays, etc.) to meet the needs of maintenance and operation personnel for the on / off status of the controllable switch 202.

[0114] Reference Figure 10This application also proposes a power device 101 for controlling the on / off state of a switching switch 108. The switching switch 108 includes a first processor 201, a controllable switch 202, a first sensor 203, a first port 204, a second port 205, and a communication port 206. The first side of the controllable switch 202 is electrically connected to the first port 204, and the second side of the controllable switch 202 is electrically connected to the second port 205. The first sensor 203 is disposed between the first side of the controllable switch 202 and the first port 204 for detecting target electrical information. The power device 101 includes a second processor 1012 and an inverter circuit 1011. The AC output port of the inverter circuit 1011 is electrically connected to the second port 205, and the first port 204 is used to connect to the power grid 104. The second processor 1012 is communicatively connected to the first processor 201 via the communication port 206, and the second processor 1012 is used for: Receive target electrical information detected by the first sensor 203 and sent by the first processor 201; Based on the target electrical information detected by the first sensor 203, a first control command is generated for the controllable switch 202 and sent to the first processor 201 so that the first processor 201 controls the controllable switch 202 to operate according to the control action indicated by the first control command.

[0115] Specifically, the power device 101 can be used to control the on / off state of the switch 108 as described in any of the above embodiments. The power device 101 may include a second processor 1012 and an inverter circuit 1011. The AC output port of the inverter circuit 1011 can serve as the AC output port of the power device 101. The second processor 1012 can communicate with the first processor 201 in the switch 108 through the communication port 206 in the switch 108.

[0116] The second processor 1012 can receive target electrical information detected by the first sensor 203, sent by the first processor 201, via communication port 206. The first sensor 203 is located on the power grid 104 side of the controllable switch 202 in the switch 108. The target electrical information detected by the first sensor 203 may include the voltage on the power grid 104 side of the controllable switch 202, and may also include the frequency and phase on the power grid 104 side of the controllable switch 202. Based on the target electrical information detected by the first sensor 203, the second processor 1012 can generate a first control command for the controllable switch 202. The control action indicated by the first control command may include a closing action and a closing action. For example, the target electrical information detected by the first sensor 203 may include the voltage on the grid 104 side of the controllable switch 202. If the target electrical information detected by the first sensor 203 indicates an abnormal voltage on the grid 104 side, such as when the voltage on the grid 104 side of the controllable switch 202 exceeds the preset voltage range of the grid 104, the control action indicated by the first control command generated by the second processor 1012 for the controllable switch 202 can be a disconnection action to control the controllable switch 202 to disconnect, thereby causing the power device 101 to switch from grid-connected mode to off-grid mode. If the target electrical information detected by the first sensor 203 indicates that the voltage on the grid 104 side of the controllable switch 202 has returned to normal, such as when the voltage on the grid 104 side of the controllable switch 202 is within the preset voltage range of the grid 104, the control action indicated by the first control command generated by the power device 101 for the controllable switch 202 can be a closing action to control the controllable switch 202 to close, thereby causing the power device 101 to switch from off-grid mode to grid-connected mode.

[0117] In practice, after generating the first control command for the controllable switch 202, the second processor 1012 can send the first control command to the first processor 201 through the communication port 206 in the switch 108. This allows the first processor 201 to control the controllable switch 202 according to the control action indicated by the first control command, thereby controlling the controllable switch 202 to close or open. This allows the power device 101 to switch from off-grid mode to grid-connected mode, or vice versa. Thus, the switching between grid-connected and off-grid modes of the power device 101 can be achieved through the interaction between the power device 101 and the switch 108, eliminating the need for two independent power lines and greatly reducing the cost and construction difficulty of the power device 101 grid-connected / off-grid mode switching scheme.

[0118] In some embodiments, the switch 108 further includes a second sensor 207, which is disposed between the second side of the controllable switch 202 and the second port 205, for detecting target electrical information; The second processor 1012 is also used for: Receive target electrical information detected by the second sensor 207 and sent by the first processor 201; The first control command is generated based on the target electrical information detected by the first sensor 203 and the target electrical information detected by the second sensor 207.

[0119] Specifically, the second processor 1012 can also receive target electrical information detected by the second sensor 207 sent by the first processor 201 through the communication port 206. The second sensor 207 is located on the power device 101 side of the controllable switch 202 in the switching switch 108. The target electrical information detected by the second sensor 207 may include the phase on the power device 101 side of the controllable switch 202, and may also include the voltage and / or frequency on the power device 101 side of the controllable switch 202.

[0120] The second processor 1012 can also generate a first control command based on the target electrical information detected by the first sensor 203 and the target electrical information detected by the second sensor 207.

[0121] For example, when the current operating mode of the power device 101 is off-grid mode, the second processor 1012, upon determining that the grid connection conditions are met based on the target electrical information detected by the first sensor 203, can adjust the output of the inverter circuit 1011 according to the target electrical information detected by the first sensor 203 and the target electrical information detected by the second sensor 207. When the target electrical information detected by the first sensor 203 and the target electrical information detected by the second sensor 207 are consistent, a first control command indicating a closed action is generated to ensure reliable control of the controllable switch 202. When the current operating mode of device 101 is grid-connected, the second processor 1012 can generate a first control command indicating a disconnection action when it is determined that the grid connection conditions are not met based on the target electrical information detected by the first sensor 203 and the target electrical information detected by the second sensor 207. This ensures reliable control of the controllable switch 202. At the same time, the second processor 1012 can also adjust the output of the inverter circuit 1011 based on the target electrical information detected by the second sensor 207 and the output requirements of the power device 101 in off-grid mode, thereby ensuring the effective operation of the power device 101.

[0122] In some embodiments, the second processor 1012 is specifically used for: When the current operating mode of the power device 101 is standby mode or off-grid mode, and the power device 101 meets the grid connection conditions, based on the target electrical information detected by the first sensor 203, or simultaneously based on the target electrical information detected by the first sensor 203 and the target electrical information detected by the second sensor 207, the inverter circuit 1011 is controlled to adjust the output power, and when the power output of the inverter circuit 1011 is consistent with the target electrical information detected by the first sensor 203, a first control command indicating a closed action is generated.

[0123] Specifically, when the power device 101 is currently operating in standby mode or off-grid mode, the second processor 1012 can receive in real time the target electrical information detected by the first sensor 203 sent by the first processor 201, or receive in real time the target electrical information detected by the first sensor 203 and the target electrical information detected by the second sensor 207 sent by the first processor 201. The second processor 1012 can determine whether the power device 101 meets the grid connection conditions based on the target electrical information detected by the first sensor 203, and can also simultaneously determine whether the power device 101 meets the grid connection conditions based on the target electrical information detected by the first sensor 203 and the target electrical information detected by the second sensor 207, as well as the target judgment conditions. The target judgment conditions may include grid connection judgment conditions other than the voltage on the grid 104 side of the controllable switch 202 and the voltage on the power device 101 side of the controllable switch 202, such as the insulation resistance of the DC side and AC side of the power device 101.

[0124] In cases where the power device 101 does not meet the grid connection conditions, the second processor 1012 can control the inverter circuit 1011 to maintain off-grid operation or issue an alarm. For example, when the target electrical information detected by the first sensor 203 indicates that the power device 101 does not meet the grid connection conditions, the second processor 1012 can control the inverter circuit 1011 to maintain off-grid operation; when the target electrical information detected by the second sensor 207 and / or the target judgment conditions indicate that the power device 101 does not meet the grid connection conditions, the second processor 1012 can control the inverter circuit 1011 to stop operation and issue an alarm.

[0125] Optionally, if the data sent from the first processor 201 to the second processor 1012 only includes the target electrical information detected by the first sensor 203, the second processor 1012 can adjust the output of the inverter circuit 1011 according to the voltage, frequency, and phase in the target electrical information detected by the first sensor 203, and detect the voltage, frequency, and phase output by the inverter circuit 1011 in real time until the voltage, frequency, and phase output by the inverter circuit 1011 are consistent with the voltage, frequency, and phase in the target electrical information detected by the first sensor 203. When the voltage, frequency, and phase output by the inverter circuit 1011 are consistent with the voltage, frequency, and phase in the target electrical information detected by the first sensor 203, a first control command indicating a closing action is generated, and the first control command is sent to the first processor 201 via DO, RS485, CAN, or ETH to control the controllable switch 202 to close, thereby ensuring that the operating mode of the power device 101 is effectively switched to grid-connected mode.

[0126] Furthermore, if the data sent from the first processor 201 to the second processor 1012 simultaneously includes the target electrical information detected by the first sensor 203 and the target electrical information detected by the second sensor 207, the second processor 1012 can adjust the output of the inverter circuit 1011 according to the voltage and frequency in the target electrical information detected by the first sensor 203, and the phase difference between the phase detected by the first sensor 203 and the phase detected by the second processor 1012, until the voltage and frequency output by the inverter circuit 1011 are consistent with the voltage and frequency in the target electrical information detected by the first sensor 203, and the phase difference between the phase detected by the first processor 201 and the phase detected by the second processor 1012 is 0. This can effectively avoid the output phase sequence of the inverter circuit 1011 being inconsistent with the phase sequence of the grid 104 side of the controllable switch 202, which would affect the grid connection safety and reliability of the power device 101, and thus ensure that the operating mode of the power device 101 is effectively switched to the grid connection mode.

[0127] Understandably, when the target electrical information detected by the second sensor 207 includes the voltage and frequency on the power device 101 side of the controllable switch 202, the second processor 1012 can use the voltage and frequency in the target electrical information detected by the second sensor 207 as the voltage and frequency output by the inverter circuit 1011, and compare it with the voltage and frequency in the target electrical information detected by the first sensor 203 to determine whether the voltage and frequency output by the inverter circuit 1011 is consistent with the voltage and frequency in the target electrical information detected by the first sensor 203; when the target electrical information detected by the second sensor 207 does not include the voltage and frequency on the power device 101 side of the controllable switch 202, the second processor 1012 can detect the voltage and frequency output by the inverter circuit 1011 in real time, and compare it with the voltage and frequency in the target electrical information detected by the first sensor 203 to determine whether the voltage and frequency output by the inverter circuit 1011 is consistent with the voltage and frequency in the target electrical information detected by the first sensor 203.

[0128] In some embodiments, when the current operating mode of the power device 101 is grid-connected mode, if the target electrical information detected by the first sensor 203 indicates that the current voltage of the power grid 104 exceeds the preset voltage range of the power grid 104, a first control command is generated indicating that the control action is a disconnection action.

[0129] Specifically, when the current operating mode of the power device 101 is grid-connected, the second processor 1012 can receive the target electrical information detected by the first sensor 203 sent by the first processor 201 in real time, and use the voltage in the target electrical information detected by the first sensor 203 as the current voltage of the power grid 104. Furthermore, it compares the current voltage of the power grid 104 with a preset voltage range of the power grid 104. If the current voltage of the power grid 104 is within the preset voltage range, the first control command does not need to be sent to the first processor 201, allowing the power device 101 to maintain grid-connected operation. If the current voltage of the power grid 104 exceeds the preset voltage range (e.g., the current voltage is greater than the upper limit or less than the lower limit), a first control command indicating a disconnection action is generated and sent to the first processor 201 to control the controllable switch 202 to disconnect, thereby ensuring that the operating mode of the power device 101 is effectively switched to off-grid mode.

[0130] Understandably, when the current voltage of the power grid 104 exceeds the preset voltage range of the power grid 104, the second processor 1012 can send a first control command indicating a disconnection action to the first processor 201 via DO to quickly disconnect the power device 101 from the power grid 104. Alternatively, the second processor 1012 can also send the first control command indicating a disconnection action to the first processor 201 via fast communication methods such as CAN / ETH / EtherCAT to ensure that the controllable switch 202 can reliably disconnect within a target time (e.g., 20ms).

[0131] In some embodiments, the second processor 1012 is further configured to: Receive the current on / off state of the controllable switch 202 sent by the first processor 201; Based on the current on / off state of the controllable switch 202, the control strategy is switched, or a safety protection strategy is executed.

[0132] Specifically, the first processor 201 can also provide real-time feedback on the current on / off state of the controllable switch 202 to the second processor 1012. Upon receiving the current on / off state of the controllable switch 202 from the first processor 201, the second processor 1012 can switch control strategies or execute safety protection strategies based on the current on / off state of the controllable switch 202.

[0133] For example, after the second processor 1012 sends the first control command to the controllable switch 202, it can determine whether the controllable switch 202 will execute the control action indicated by the first control command based on the current on / off state of the controllable switch 202. If yes, the control strategy is switched, for example, from the control strategy corresponding to the grid-connected mode to the control strategy corresponding to the off-grid mode, or vice versa. If no, a safety protection strategy is executed. The safety protection strategy can be set according to actual needs, for example, it may include controlling the AC switch K inside the power device 101. AC Disconnect, and / or generate alarm information. Additionally, if the second processor 1012 does not send a first control command for the controllable switch 202, it can determine whether the current on / off state of the controllable switch 202 is consistent with the current operating mode of the power device 101. If they are consistent, the current control strategy can be maintained; if they are inconsistent, the control strategy is switched, thereby ensuring the reliable operation of the power device 101.

[0134] In some embodiments, an AC switch K is also included. AC The AC switch K ACIt is located between the AC output port of the inverter circuit 1011 and the second port 205; The second processor 1012 is specifically used for: After sending the first control command to the first processor 201, if the current on / off state of the controllable switch 202 is consistent with the control action indicated by the first control command, the inverter circuit 1011 is controlled to operate based on the control strategy corresponding to the target operating mode, which is either off-grid mode or grid-connected mode. If the current on / off state of the controllable switch 202 is inconsistent with the control action indicated by the first control command, and the control action indicated by the first control command is an off action, then the AC switch K is controlled. AC disconnect; If the current on / off state of the controllable switch 202 is inconsistent with the first control command, and the control action indicated by the first control command is a closing action, then an alarm message is generated.

[0135] For details, please refer to Figure 10 The power device 101 may also include an AC switch K. AC AC switch K AC The AC switch K is positioned between the AC output port of the inverter circuit 1011 and the second port 205 of the switch 108. AC The on / off state is used to control the connection or disconnection of the power device 101 and the changeover switch 108. It can be understood that when the power device 101 is disconnected from the changeover switch 108, the power device 101 is disconnected from the power grid 104.

[0136] In this process, after the second processor 1012 sends the first control command to the first processor 201, if the current on / off state of the controllable switch 202 sent by the first processor 201 is consistent with the control action indicated by the first control command, then the second processor 1012 controls the inverter circuit 1011 to operate based on the control strategy corresponding to the target operating mode. The target operating mode can be the operating mode corresponding to the first control command in either off-grid mode or grid-connected mode. For example, when the control action indicated by the first control command is a disconnection action, the operating mode corresponding to the first control command is off-grid mode. At this time, the second processor 1012 can control the inverter circuit 1011 to operate according to the off-grid voltage and off-grid frequency set in the off-grid mode to ensure that the load 105 operates without power interruption. When the control action indicated by the first control command is a closing action, the operating mode corresponding to the first control command is grid-connected mode. At this time, the second processor 1012 can control the inverter circuit 1011 to operate according to the voltage, frequency, and phase of the power grid 104 to ensure the reliable grid connection of the power device 101.

[0137] If the current on / off state of the controllable switch 202 sent by the first processor 201 is inconsistent with the control action indicated by the first control command, it indicates that the switch 108 is faulty, such as the controllable switch 202 being stuck or the software of the first processor 201 being abnormal. In this case, if the control action indicated by the first control command is an off action, it indicates that there is a risk that the controllable switch 202 cannot be effectively disconnected. The second processor 1012 can then control the AC switch K. AC Disconnection ensures that the power device 101 is disconnected from the power grid 104, thereby guaranteeing the safe and reliable operation of the power device 101 and preventing electric shock to personnel during power grid 104 maintenance. Simultaneously, the second processor 1012 can generate alarm information to indicate a fault in the switch 108, facilitating timely maintenance by relevant personnel. If the control action indicated by the first control command is a closing action, it indicates that the controllable switch 202 may fail to close effectively. The second processor 1012 can then generate alarm information to indicate a fault in the switch 108, facilitating timely maintenance by relevant personnel.

[0138] Understandably, after sending the first control command to the first processor 201, the second processor 1012 can also determine whether the current on / off state of the controllable switch 202 is consistent with the control action indicated by the first control command based on the target electrical information detected by the first sensor 203. For example, if the control action indicated by the first control command is an off action, but the voltage, frequency, and other information in the target electrical information detected by the first sensor 203 are still valid, then it is determined that the current on / off state of the controllable switch 202 is inconsistent with the control action indicated by the first control command, and the AC switch K is controlled. AC Disconnect, or, in the control AC switch K AC An alarm message is generated at the same time as the connection is made.

[0139] In some embodiments, the second processor 1012 is further configured to: If the inverter circuit 1011 is in grid-connected mode and the controllable switch 202 is in open state when the first control command is not sent to the first processor 201, the inverter circuit 1011 is controlled to operate based on the control strategy corresponding to the off-grid mode.

[0140] Specifically, if the second processor 1012 does not send a first control command for the controllable switch 202, and the current operating mode of the inverter circuit 1011 is grid-connected mode, and the current on / off state of the received controllable switch 202 is off, it indicates that the controllable switch 202 is disconnected due to overcurrent abnormality, temperature abnormality, or a second control command triggered by human intervention. At this time, the second processor 1012 can control the operation of the inverter circuit 1011 based on the control strategy corresponding to the off-grid mode, thereby ensuring the reliable operation of the power device 101.

[0141] Corresponding to the aforementioned switch 108, this application embodiment also provides a distribution box 102, see reference. Figure 11 It includes a first circuit breaker K5, a second circuit breaker K6, and a switching switch 108 as described in any of the above embodiments; Wherein, the first end of the first circuit breaker K5 is electrically connected to the second port 205, and the second end of the first circuit breaker K5 is used to connect to the load 105. The first end of the second circuit breaker K6 is electrically connected to the first port 204, and the second end of the second circuit breaker K6 is used to connect to the power grid 104.

[0142] Specifically, the first circuit breaker K5 can be used to control the connection or disconnection of the line between the power device 101 and the load 105, and the second circuit breaker K6 can be used to control the connection or disconnection of the line between the switching switch 108 and the power grid 104.

[0143] Both the first circuit breaker K5 and the second circuit breaker K6 can be equipped with trip units to automatically disconnect when an overcurrent abnormality occurs in the corresponding line, thereby ensuring the safety of the distribution box 102. Simultaneously, the first circuit breaker K5 and the second circuit breaker K6 can be manually controlled to close or open according to actual needs, thereby improving the power distribution flexibility of the distribution box 102.

[0144] In some embodiments, reference Figure 12 It also includes a third circuit breaker K7, which is disposed between the AC output port of the power device 101 and the second port 205.

[0145] Specifically, the third circuit breaker K7 can be used to control the connection or disconnection of the line between the power device 101 and the changeover switch 108. It is understood that regardless of whether the controllable switch 202 is a controllable circuit breaker, the third circuit breaker K7 can be installed between the AC output port of the power device 101 and the second port 205, thereby enabling flexible and reliable control of the connection or disconnection of the line between the power device 101 and the distribution box 102.

[0146] This application also provides an energy storage power supply system, including a power device 101 as described in any of the above embodiments and a distribution box 102 as described in any of the above embodiments; The power device 101 has a DC input port for electrical connection to an energy storage battery, and the power distribution box 102 is electrically connected to the AC output port of the power device 101. The power distribution box 102 is also communicatively connected to the power device 101.

[0147] This application embodiment also provides a power supply control method applied to a switch 108, the power supply control method comprising: The target electrical information detected by the first sensor 203 in the switching switch 108 is sent to the power device 101; the first sensor 203 is disposed between the first side of the controllable switch 202 in the switching switch 108 and the first port 204 of the switching switch 108, the first side of the controllable switch 202 is electrically connected to the first port 204 of the switching switch 108, the second side of the controllable switch 202 is electrically connected to the second port 205 of the switching switch 108, the first port 204 is used to connect to the power grid 104, and the second port 205 is used to connect to the AC output port of the power device 101; The device receives a first control command from the power device 101 for the controllable switch 202, and controls the controllable switch 202 to operate according to the control action indicated by the first control command.

[0148] In some embodiments, it also includes: The target electrical information detected by the second sensor 207 in the switching switch 108 is sent to the power device 101, so that the power device 101 generates the first control command based on the target electrical information detected by the first sensor 203 and the target electrical information detected by the second sensor 207. Alternatively, according to the control action indicated by the first control command, the controllable switch 202 is controlled to operate, including: Based on the target electrical information detected by the first sensor 203, the target electrical information detected by the second sensor 207, and the control action indicated by the first control command, the execution action for the controllable switch 202 is determined, and the controllable switch 202 is controlled to operate according to the execution action.

[0149] In some embodiments, it also includes: Receive a second control command triggered manually for the controllable switch 202; The controllable switch 202 is controlled to operate according to the control action indicated by the second control command.

[0150] In some embodiments, it also includes: Receive the temperature signal detected by the temperature sensor within the switch 108; When the temperature signal is greater than the preset temperature, the controllable switch 202 is turned off.

[0151] In some embodiments, it also includes: The current on / off state of the controllable switch 202 is obtained and sent to the power device 101 so that the power device 101 can switch the control strategy or execute the safety protection strategy according to the current on / off state of the controllable switch 202.

[0152] This application embodiment also provides another power supply control method applied to a power device 101. The power device 101 is used to control the on / off state of a switching switch 108. The switching switch 108 includes a first processor 201, a controllable switch 202, a first sensor 203, a first port 204, a second port 205, and a communication port 206. The first side of the controllable switch 202 is electrically connected to the first port 204, and the second side of the controllable switch 202 is electrically connected to the second port 205. The first sensor 203 is disposed between the first side of the controllable switch 202 and the first port 204 for detecting target electrical information. The AC output port of the power device 101 is electrically connected to the second port 205, and the first port 204 is used to connect to the power grid 104. The power supply control method includes: Receive target electrical information detected by the first sensor 203 and sent by the first processor 201; Based on the target electrical information detected by the first sensor 203, a first control command is generated for the controllable switch 202 and sent to the first processor 201, so that the first processor 201 controls the controllable switch 202 to operate according to the control action indicated by the first control command.

[0153] In some embodiments, it also includes: The first processor 201 receives target electrical information detected by the second sensor 207, which is located between the second side of the controllable switch 202 and the second port 205. The first control command is generated based on the target electrical information detected by the first sensor 203 and the target electrical information detected by the second sensor 207.

[0154] In some embodiments, generating the first control command includes: When the current operating mode of the power device 101 is standby mode or off-grid mode, and the power device 101 meets the grid connection conditions, based on the target electrical information detected by the first sensor 203, or simultaneously based on the target electrical information detected by the first sensor 203 and the target electrical information detected by the second sensor 207, the inverter circuit 1011 is controlled to adjust the output power, and when the power output of the inverter circuit 1011 is consistent with the target electrical information detected by the first sensor 203, a first control command indicating a closed action is generated.

[0155] In some embodiments, generating the first control command includes: When the current operating mode of the power device 101 is grid-connected mode, if the target electrical information detected by the first sensor 203 indicates that the current voltage of the power grid 104 exceeds the preset voltage range of the power grid 104, a first control command is generated indicating that the control action is a disconnection action.

[0156] In some embodiments, it also includes: Receive the current on / off state of the controllable switch 202 sent by the first processor 201; Based on the current on / off state of the controllable switch 202, the control strategy is switched, or a safety protection strategy is executed.

[0157] In some embodiments, based on the current on / off state of the controllable switch 202, the control strategy is switched, or a safety protection strategy is executed, including: After sending the first control command to the first processor 201, if the current on / off state of the controllable switch 202 is consistent with the control action indicated by the first control command, the inverter circuit 1011 is controlled to operate based on the control strategy corresponding to the target operating mode, which is either off-grid mode or grid-connected mode. If the current on / off state of the controllable switch 202 is inconsistent with the control action indicated by the first control command, and the control action indicated by the first control command is an off action, then the AC switch K is controlled. AC Disconnect, the AC switch K AC It is located between the AC output port of the inverter circuit 1011 and the second port 205; If the current on / off state of the controllable switch 202 is inconsistent with the first control command, and the control action indicated by the first control command is a closing action, then an alarm message is generated.

[0158] In some embodiments, based on the current on / off state of the controllable switch 202, the control strategy is switched, or a safety protection strategy is executed, including: If the inverter circuit 1011 is in grid-connected mode and the controllable switch 202 is in open state when the first control command is not sent to the first processor 201, the inverter circuit 1011 is controlled to operate based on the control strategy corresponding to the off-grid mode.

[0159] This application also provides a controller, which is described below with reference to... Figure 13 The controller provided in the embodiments of this application can be described as follows: at least one processor 100, at least one communication interface 200, at least one memory 300 and at least one communication bus 400. In this embodiment, the number of processor 100, communication interface 200, memory 300, and communication bus 400 is at least one, and the processor 100, communication interface 200, and memory 300 communicate with each other through communication bus 400; obviously, Figure 13 The communication connections shown for the processor 100, communication interface 200, memory 300, and communication bus 400 are optional. Optionally, the communication interface 200 can be an interface of a communication module, such as the interface of a GSM module; the processor 100 may be a central processing unit (CPU), an application-specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of this application.

[0160] The memory 300 may include high-speed RAM memory, and may also include non-volatile memory, such as at least one disk storage device.

[0161] Specifically, the processor 100 is used to execute the application program in the memory to implement the steps of the power supply control method described above.

[0162] In some embodiments, this application also provides a computer-readable storage medium, such as a floppy disk, optical disk, hard disk, flash memory, USB flash drive, SD (Secure Digital Memory Card), MMC (Multimedia Card), etc., in which one or more instructions implementing the above steps are stored. When these one or more instructions are executed by one or more processors, the processors perform the power supply control method described above. For specific implementation details, please refer to the foregoing description; further elaboration is not provided here.

[0163] In addition to the methods and devices described above, embodiments of this application may also be computer program products, which include computer program instructions that, when executed by a processor, cause the processor to perform the steps of the power supply control methods according to various embodiments of this application as described above.

[0164] Computer program products can be written in any combination of one or more programming languages ​​to perform the operations of the embodiments of this application. The programming languages ​​include object-oriented programming languages ​​such as Java and C++, as well as conventional procedural programming languages ​​such as C or similar languages. The program code can be executed entirely on the user's computing device, partially on the user's computing device, as a standalone software package, partially on the user's computing device and partially on a remote computing device, or entirely on a remote computing device or server.

[0165] Those skilled in the art will understand that the contents disclosed herein can be varied and modified in many ways. For example, the various devices or components described above can be implemented in hardware, or in software, firmware, or a combination of some or all of the three.

[0166] Furthermore, while this disclosure makes various references to certain elements of systems according to embodiments of this disclosure, any number of different elements may be used and operated on clients and / or servers. Elements are merely illustrative, and different aspects of the system and method may use different elements.

[0167] This disclosure uses flowcharts to illustrate the steps of a method according to embodiments of this disclosure. It should be understood that the preceding or following steps are not necessarily performed in exact order. Instead, the steps can be processed in reverse order or simultaneously. Furthermore, other operations can be added to these processes.

[0168] Those skilled in the art will understand that all or part of the steps in the above methods can be implemented by a computer program instructing related hardware, and the program can be stored in a computer-readable storage medium, such as a read-only memory. Optionally, all or part of the steps in the above embodiments can also be implemented using one or more integrated circuits. Accordingly, each module / unit in the above embodiments can be implemented in hardware or as a software functional module. This disclosure is not limited to any particular combination of hardware and software.

[0169] Unless otherwise defined, all terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure pertains. It should also be understood that terms such as those defined in a common dictionary should be interpreted as having a meaning consistent with their meaning in the context of the relevant art, and not as having an idealized or highly formalized meaning, unless expressly defined herein.

[0170] The foregoing description is intended to illustrate the present disclosure and should not be construed as limiting it. While several exemplary embodiments of the present disclosure have been described, those skilled in the art will readily understand that many modifications may be made to the exemplary embodiments without departing from the novel teachings and advantages of the present disclosure. Therefore, all such modifications are intended to be included within the scope of the present disclosure as defined by the claims. It should be understood that the foregoing description is intended to illustrate the present disclosure and should not be construed as limiting it to the specific embodiments disclosed, and modifications to the disclosed embodiments and other embodiments are intended to be included within the scope of the appended claims. The present disclosure is defined by the claims and their equivalents.

Claims

1. A switching switch, characterized in that, It includes a first processor, a controllable switch, a first sensor, a first port, a second port, and a communication port; the first port is used to connect to the power grid, and the second port is used to connect to the AC output port of the power device. The first side of the controllable switch is electrically connected to the first port, and the second side of the controllable switch is electrically connected to the second port; The first sensor is disposed between the first side of the controllable switch and the first port, and is used to detect target electrical information; The communication port is used for communication connection with the power device; The first processor is configured to send the target electrical information detected by the first sensor to the power device through the communication port, and to receive a first control command from the power device for the controllable switch through the communication port, and to control the controllable switch to operate according to the control action indicated by the first control command; wherein the first control command is a control command generated by the power device based on the target electrical information detected by the first sensor.

2. The switching switch according to claim 1, characterized in that, The switch also includes a second sensor; The second sensor is disposed between the second side of the controllable switch and the second port, and is used to detect target electrical information; The first processor is further configured to send the target electrical information detected by the second sensor to the power device through the communication port, so that the power device generates the first control command based on the target electrical information detected by the first sensor and the target electrical information detected by the second sensor; or, The first processor is specifically configured to: determine an execution action for the controllable switch based on the target electrical information detected by the first sensor, the target electrical information detected by the second sensor, and the control action indicated by the first control command, and control the controllable switch to operate according to the execution action.

3. The switching switch according to claim 1, characterized in that, It also includes auxiliary power supply circuitry; The auxiliary power source circuit includes an auxiliary power source input terminal, a conversion circuit, and an auxiliary power source output terminal. The auxiliary power input terminal is electrically connected to the first port and / or the second port; The conversion circuit is used to convert the AC power input at the auxiliary source input terminal into DC power and output it from the auxiliary source output terminal. The auxiliary power output terminal is electrically connected to the power supply port of the first processor.

4. The switching switch according to claim 3, characterized in that, Includes at least two of the aforementioned auxiliary power circuits; Wherein, at least one of the auxiliary power source circuits has its auxiliary power source input terminal electrically connected to the first port; and at least one of the auxiliary power source circuits has its auxiliary power source input terminal electrically connected to the second port.

5. The switching switch according to claim 3, characterized in that, It also includes a power output port, which is electrically connected to the auxiliary power output terminal.

6. The switching switch according to claim 3, characterized in that, It also includes a gating circuit, through which the auxiliary source input terminal is electrically connected to the first port and the second port; The gating circuit includes a first gating input terminal, a second gating input terminal, a gating output terminal, and a gating control terminal. The first strobe input terminal is electrically connected to the first port, the second strobe input terminal is electrically connected to the second port, the strobe output terminal is electrically connected to the auxiliary source input terminal, and the strobe control terminal is electrically connected to either the first port or the second port. The gating circuit is used to connect the gating output terminal to the first gating input terminal, or connect the gating output terminal to the second gating input terminal, based on the relationship between the input voltage of the gating control terminal and the preset voltage.

7. The switching switch according to claim 1, characterized in that, It also includes a DC power supply, the output port of which is electrically connected to the power supply port of the first processor to supply power to the first processor.

8. The switching switch according to claim 1, characterized in that, It also includes a power input port, which is electrically connected to the power supply port of the first processor, and the power input port is used to connect to the power supply.

9. The switching switch according to claim 1, characterized in that, It also includes a current sensor and / or a current input port, wherein the current sensor is disposed between the first side of the controllable switch and the first port for detecting current signals; The current input port is used to receive current signals detected by an external current sensor, including current signals flowing through the controllable switch and / or current signals from external devices.

10. The switching switch according to claim 1, characterized in that, The controllable switch includes a controllable circuit breaker, which is used to disconnect when the target current is greater than a preset current, wherein the target current is the current flowing through the controllable circuit breaker.

11. The switching switch according to claim 1, characterized in that, It also includes an instruction input module for receiving a second control instruction triggered manually for the controllable switch; The first processor is further configured to control the operation of the controllable switch according to the control action indicated by the second control instruction.

12. The switching switch according to claim 1, characterized in that, It also includes a temperature sensor for detecting the temperature signal within the switch; The first processor is also configured to control the controllable switch to open when the temperature signal detected by the temperature sensor is greater than a preset temperature.

13. The switching switch according to any one of claims 1 to 12, characterized in that, The first processor is also used for: The current on / off state of the controllable switch is obtained, and the current on / off state of the controllable switch is sent to the power device through the communication port, so that the power device can switch the control strategy or execute the safety protection strategy according to the current on / off state of the controllable switch.

14. A power device, characterized in that, The switching device is used to control the on / off state of a switching switch. The switching switch includes a first processor, a controllable switch, a first sensor, a first port, a second port, and a communication port. A first side of the controllable switch is electrically connected to the first port, and a second side of the controllable switch is electrically connected to the second port. The first sensor is disposed between the first side of the controllable switch and the first port and is used to detect target electrical information. The power device includes a second processor and an inverter circuit. The AC output port of the inverter circuit is electrically connected to the second port, and the first port is used to connect to the power grid. The second processor is communicatively connected to the first processor via the communication port, and the second processor is used for: Receive target electrical information detected by the first sensor and sent by the first processor; Based on the target electrical information detected by the first sensor, a first control command is generated for the controllable switch and sent to the first processor, so that the first processor controls the controllable switch to operate according to the control action indicated by the first control command.

15. The power device according to claim 14, characterized in that, The switching switch also includes a second sensor, which is disposed between the second side of the controllable switch and the second port, for detecting target electrical information; The second processor is also used for: Receive target electrical information detected by the second sensor and sent by the first processor; The first control command is generated based on the target electrical information detected by the first sensor and the target electrical information detected by the second sensor.

16. The power device according to claim 14 or 15, characterized in that, The second processor is specifically used for: When the current operating mode of the power device is standby mode or off-grid mode, and the power device meets the grid connection conditions, the inverter circuit is controlled to adjust the output power based on the target electrical information detected by the first sensor, or simultaneously based on the target electrical information detected by the first sensor and the target electrical information detected by the second sensor. When the power output by the inverter circuit is consistent with the target electrical information detected by the first sensor, a first control command is generated indicating that the control action is a closed action.

17. The power device according to claim 14, characterized in that, The second processor is specifically used for: When the current operating mode of the power device is grid-connected, if the target electrical information detected by the first sensor indicates that the current voltage of the power grid exceeds the preset voltage range of the power grid, a first control command is generated indicating that the control action is a disconnection action.

18. The power device according to claim 14, characterized in that, The second processor is also used for: Receive the current on / off state of the controllable switch sent by the first processor; Based on the current on / off state of the controllable switch, the control strategy is switched, or a safety protection strategy is executed.

19. The power device according to claim 18, characterized in that, It also includes an AC switch, which is disposed between the AC output port of the inverter circuit and the second port; The second processor is specifically used for: After sending the first control command to the first processor, if the current on / off state of the controllable switch is consistent with the control action indicated by the first control command, the inverter circuit is controlled to operate based on the control strategy corresponding to the target operating mode, which is either off-grid mode or grid-connected mode. If the current on / off state of the controllable switch is inconsistent with the control action indicated by the first control command, and the control action indicated by the first control command is a disconnection action, then the AC switch is controlled to disconnect. If the current on / off state of the controllable switch is inconsistent with the first control command, and the control action indicated by the first control command is a closing action, then an alarm message is generated.

20. The power device according to claim 18, characterized in that, The second processor is also used for: If the inverter circuit is currently in grid-connected mode and the controllable switch is currently in open state when the first control command is not sent to the first processor, the inverter circuit is controlled to operate based on the control strategy corresponding to the off-grid mode.

21. A distribution box, comprising a first circuit breaker, a second circuit breaker, and a switching switch as described in any one of claims 1 to 13; in, The first terminal of the first circuit breaker is electrically connected to the second port, and the second terminal of the first circuit breaker is used to connect to the load; The first end of the second circuit breaker is electrically connected to the first port, and the second end of the second circuit breaker is used to connect to the power grid.

22. The distribution box according to claim 21, characterized in that, It also includes a third circuit breaker, which is disposed between the AC output port of the power device and the second port.

23. An energy storage power supply system, characterized in that, Includes the power equipment as described in any one of claims 14 to 20 and the distribution box as described in claim 21 or 22; The power device's DC input port is used to electrically connect to the energy storage battery, the distribution box is electrically connected to the power device's AC output port, and the distribution box is also communicatively connected to the power device.

24. A power supply control method, characterized in that, Applied to a switching switch, the method includes: The target electrical information detected by the first sensor in the switching switch is sent to the power device; the first sensor is disposed between the first side of the controllable switch in the switching switch and the first port of the switching switch, the first side of the controllable switch is electrically connected to the first port of the switching switch, the second side of the controllable switch is electrically connected to the second port of the switching switch, the first port is used to connect to the power grid, and the second port is used to connect to the AC output port of the power device; The device receives a first control command from the power device for the controllable switch, and controls the controllable switch to operate according to the control action indicated by the first control command.

25. A power supply control method, characterized in that, This invention is applied to power devices, which control the on / off state of a switching device. The switching device includes a first processor, a controllable switch, a first sensor, a first port, a second port, and a communication port. A first side of the controllable switch is electrically connected to the first port, and a second side of the controllable switch is electrically connected to the second port. The first sensor is disposed between the first side of the controllable switch and the first port and is used to detect target electrical information. The AC output port of the power device is electrically connected to the second port, and the first port is used to connect to the power grid; the method includes: Receive target electrical information detected by the first sensor and sent by the first processor; Based on the target electrical information detected by the first sensor, a first control command is generated for the controllable switch and sent to the first processor, so that the first processor controls the controllable switch to operate according to the control action indicated by the first control command.

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