CN217406198U - Control box and light storage power supply system - Google Patents

Abstract

The utility model provides a control box and light storage power supply system relates to solar photovoltaic technology field. The control box includes: the system comprises a controller, a power grid breaker, a photovoltaic grid-connected breaker and a grid-connected load breaker. The power grid breaker is connected with a public power grid so as to access the public power grid; and the photovoltaic grid-connected circuit breaker is connected with the grid-connected output end of the inverter in the photovoltaic system. The grid-connected load circuit breaker is connected with the output end of the power grid circuit breaker and the output end of the photovoltaic grid-connected circuit breaker, and the grid-connected load circuit breaker is connected with a grid-connected load to supply power for the grid-connected load. The controller can send a control instruction to a grid-connected load circuit breaker connected with the grid-connected load or send a control instruction to the grid-connected load so as to control the start or stop of the grid-connected load, and the automatic control of the grid-connected load can be realized.

Description

Control box and light storage power supply system

Technical Field

The utility model relates to a solar photovoltaic technology field especially relates to a control box and light storage power supply system.

Background

With the continuous reduction of the photovoltaic power generation cost and the rising of the environmental protection requirement, the distributed photovoltaic is rapidly developed and becomes an economic and environmental-friendly new energy source.

In household photovoltaic power generation, the control box is used for connecting a public power grid, a photovoltaic system and a load to realize distribution and calling of electric energy. In the prior art, the control box only has a simple on-off function, and cannot automatically control the load according to the user requirements.

SUMMERY OF THE UTILITY MODEL

The utility model provides a control box and light store up power supply system aims at solving the problem that the control box can't carry out automatic control to the load.

The embodiment of the utility model provides a control box, include: the system comprises a controller, a power grid breaker, a photovoltaic grid-connected breaker and a plurality of grid-connected load breakers;

the input end of the power grid breaker is used for being connected with a public power grid so as to be connected into the public power grid;

the input end of the photovoltaic grid-connected circuit breaker is used for connecting the grid-connected output end of an inverter in a photovoltaic system;

the input end of the grid-connected load circuit breaker is respectively connected with the output end of the power grid circuit breaker and the output end of the photovoltaic grid-connected circuit breaker, and the output end of the grid-connected load circuit breaker is used for being connected with a grid-connected load to supply power to the grid-connected load;

the controller is connected with the grid-connected load circuit breaker or at least one of the grid-connected loads, and the controller is used for sending the control instruction to the grid-connected load circuit breaker or at least one of the grid-connected loads so as to control the start or stop of the grid-connected loads.

Optionally, the system further comprises a photovoltaic off-grid circuit breaker; the input end of the photovoltaic off-grid circuit breaker is used for being connected with the off-grid output end of the inverter; the output end of the photovoltaic off-grid circuit breaker is used for being connected with an off-grid load so as to continuously supply power to the off-grid load.

Optionally, the grid-connected load circuit breaker comprises a three-phase grid-connected load circuit breaker and/or a single-phase grid-connected load circuit breaker; the grid-connected load comprises a three-phase grid-connected load and/or a single-phase grid-connected load;

the output end of the three-phase grid-connected load circuit breaker is used for being connected with the power input end of the three-phase grid-connected load; and the output end of the single-phase grid-connected load circuit breaker is used for being connected with the power input end of the single-phase grid-connected load.

Optionally, still include single-phase total control circuit breaker, single-phase total control circuit breaker's input respectively with photovoltaic grid-connected circuit breaker's output with the output of grid-connected circuit breaker is connected, single-phase total control circuit breaker's output with single-phase load circuit breaker's input of being connected to the power networks is connected.

Optionally, the system further comprises a switching power supply, wherein an input end of the switching power supply is connected with an output end of one of the single-phase grid-connected load circuit breakers; and the output end of the switching power supply is connected with the power input end of the controller and used for providing power supply voltage for the controller.

Optionally, the mobile terminal further comprises a network access device, and the controller is in communication connection with the network access device and is configured to connect to a network through the network access device.

Optionally, the system further comprises a switch, and the controller is in communication connection with the grid-connected load circuit breaker and the grid-connected load through the switch.

Optionally, the system further comprises a monitoring device and a current transformer, wherein a voltage sampling end of the monitoring device is connected with the grid-connected connection point to obtain a voltage parameter of the grid-connected connection point; the grid-connected connection point is a connection point between the power grid circuit breaker and the photovoltaic grid-connected circuit breaker;

the current transformer is arranged at the input end of the power grid circuit breaker, and the current sampling end of the monitoring device is connected with the current transformer so as to acquire current parameters of the public power grid side through the current transformer and determine the system power of the grid-connected connection point according to the voltage parameters and the current parameters;

the monitoring equipment is in communication connection with the inverter and is used for sending the system power to the inverter so that the inverter controls the output power of the grid-connected output end according to the system power.

Optionally, the controller is in communication connection with a server, and the controller is further configured to receive the control instruction sent by the server.

The embodiment of the utility model also provides a light stores up power supply system, including the control box to and photovoltaic module, dc-to-ac converter and energy storage battery; the photovoltaic module is connected with the inverter and used for providing power for the inverter; the inverter is connected with the energy storage battery and is used for inputting the power supply provided by the photovoltaic module into the energy storage battery

The embodiment of the utility model provides an in, the control box includes controller, electric wire netting circuit breaker, photovoltaic grid-connected circuit breaker to and a plurality of load circuit breaker that is incorporated into the power networks. The input end of the power grid breaker is used for connecting a public power grid so as to access the public power grid; the input end of the photovoltaic grid-connected circuit breaker is used for connecting the grid-connected output end of an inverter in a photovoltaic system. The input end of the grid-connected load circuit breaker is respectively connected with the output end of the power grid circuit breaker and the output end of the photovoltaic grid-connected circuit breaker, and the output end of the grid-connected load circuit breaker is used for being connected with a grid-connected load to supply power for the grid-connected load. The controller is connected with at least one of the grid-connected load circuit breaker or the grid-connected load, and the controller is used for sending the control instruction to the grid-connected load circuit breaker or at least one of the grid-connected loads so as to control the start or stop of the grid-connected loads.

The controller can control the start or stop of the grid-connected load according to the requirement, and the automatic control of the grid-connected load is realized.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor.

Fig. 1 shows a schematic structural diagram of a control box in an embodiment of the present invention;

fig. 2 shows a schematic circuit diagram of a control box in an embodiment of the invention;

fig. 3 shows a schematic structural diagram of a control box in an embodiment of the present invention;

fig. 4 shows a schematic communication diagram of a controller in an embodiment of the present invention.

Description of reference numerals:

100-box, 101-controller, 102-grid breaker, 103-photovoltaic grid-connected breaker, 104-three-phase grid-connected load breaker, 105-three-phase grid-connected load breaker, 106-single-phase grid-connected load breaker, 107-single-phase master control breaker, 108-photovoltaic off-grid breaker, 109-single-phase off-grid load breaker, 110-network access equipment, 111-switch, 112-switching power supply, 113-monitoring equipment, 114-current transformer, 115-zero line terminal row, 116-ground line terminal row, 201-inverter, 202-photovoltaic module, 203-energy storage battery.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without making creative efforts belong to the protection scope of the present invention.

Referring to fig. 1 and fig. 2, fig. 1 shows a schematic structural diagram of a control box in an embodiment of the present invention, fig. 2 shows a schematic circuit diagram of a control box in an embodiment of the present invention, and the control box includes: a controller 101, a grid breaker 102, a photovoltaic grid tie breaker 103, and a plurality of grid tie load breakers.

The input end of the grid breaker 102 is used for connecting a public power grid to access the public power grid; the input end of the photovoltaic grid-connected breaker 103 is used for connecting the grid-connected output end of the inverter 201 in the photovoltaic system. The input end of the grid-connected load circuit breaker is respectively connected with the output end of the power grid circuit breaker 102 and the output end of the photovoltaic grid-connected circuit breaker 103, and the output end of the grid-connected load circuit breaker is used for being connected with a grid-connected load to supply power for the grid-connected load.

The controller is connected with at least one of the grid-connected load circuit breaker or the grid-connected load, and the controller is used for sending the control instruction to the grid-connected load circuit breaker or at least one of the grid-connected loads so as to control the start or stop of the grid-connected loads.

In this embodiment, the control box is connected with the public power grid and the photovoltaic system simultaneously, and can obtain the power from the public power grid and the photovoltaic system. For example, the photovoltaic system includes an inverter 201, a photovoltaic module 202 and an energy storage battery 203 shown in fig. 2, an output end of the photovoltaic module 202 is connected to an input end of the inverter 201, and an energy storage end of the inverter 201 is connected to the energy storage battery 203. When receiving illumination, the photovoltaic module 202 outputs electric energy to the inverter 201, and the inverter 201 controls the electric energy to be input into the energy storage battery 203 for storage. Meanwhile, the inverter 201 may invert the electric energy stored in the energy storage battery 203 into an alternating current, which is output through a grid-connected output terminal and an off-grid output terminal.

Combine that fig. 3 is shown, fig. 3 shows the embodiment of the utility model provides an in the embodiment a structural schematic diagram of control box, public electric network is connected to electric network circuit breaker 102's input, and electric network circuit breaker 102 can follow public electric network side and acquire the power, and the output that is incorporated into the power networks of dc-to-ac converter 201 is connected to photovoltaic grid-connected circuit breaker 103's input to acquire the power from photovoltaic system. The output end of the grid circuit breaker 102 is connected with the output end of the photovoltaic grid-connected circuit breaker 103, the connection point between the grid circuit breaker 102 and the photovoltaic grid-connected circuit breaker 103 forms a grid-connected connection point, and a loop from the grid-connected connection point to a grid-connected load forms a power supply loop for supplying power to the grid-connected load. The grid circuit breaker 102 and the photovoltaic grid-connected circuit breaker 103 are, for example, 4-Pole (Pole, P) circuit breakers, an input end of the grid circuit breaker 102 is used for connecting a three-phase power supply and a zero line in a public power grid, and an input end of the photovoltaic grid-connected circuit breaker 103 is connected with the three-phase power supply and the zero line in a grid-connected output end of the inverter 201. When the grid circuit breaker 102 is disconnected and the photovoltaic grid-connected circuit breaker 103 is closed, the photovoltaic system supplies power to the grid-connected load independently; when the grid breaker 102 is closed and the photovoltaic grid-connected breaker 103 is opened, the public power grid independently supplies power to the grid-connected load; when the grid breaker 102 and the photovoltaic grid-connected breaker 103 are both closed, the public power grid and the photovoltaic system supply power to the grid-connected load at the same time; when the grid breaker 102 and the photovoltaic grid-connected breaker 103 are both disconnected, the grid-connected load is powered off and operates. The power grid circuit breaker 102 can provide overload, short circuit, overcurrent and other protection functions for the whole power supply circuit, and when the current of the power supply circuit reaches a first preset multiple of the rated tripping current of the power grid circuit breaker 102 and lasts for a preset time length, the power grid circuit breaker 102 is disconnected to provide overload and overcurrent protection for the whole power supply circuit, so that equipment damage is avoided, and personnel safety is protected. Meanwhile, when the short-circuit current of the power supply loop reaches a second preset multiple of the power grid circuit breaker 102, the power grid circuit breaker 102 is disconnected, and short-circuit protection is provided for the whole power supply loop. Similarly, the photovoltaic grid-connected circuit breaker 103 can provide protection functions such as overload, short circuit, overcurrent and the like for the grid-connected output end of the inverter.

In practical application, one or more grid-connected load circuit breakers may be disposed in the control box, wherein an input end of each grid-connected load circuit breaker is connected to a grid-connected connection point, that is, an output end of the grid circuit breaker 102 and an output end of the photovoltaic grid circuit breaker 103, and the grid-connected load circuit breaker is configured to distribute a power supply provided by a public power grid and a photovoltaic system to a grid-connected load. The controller, the power grid circuit breaker, the photovoltaic grid-connected circuit breaker and the grid-connected load circuit breaker form a power supply network to provide power for grid-connected loads.

Optionally, the grid-connected load circuit breaker comprises a three-phase grid-connected load circuit breaker and/or a single-phase grid-connected load circuit breaker; the grid-connected load comprises a three-phase grid-connected load and/or a single-phase grid-connected load, and the output end of the three-phase grid-connected load circuit breaker is used for being connected with the power input end of the three-phase grid-connected load; and the output end of the single-phase grid-connected load circuit breaker is used for being connected with the power input end of the single-phase grid-connected load.

In this embodiment, one or more three-phase grid-connected load circuit breakers may be disposed in the control box to distribute power to the three-phase grid-connected loads. As shown in fig. 2, a three-phase grid-connected load circuit breaker 104 and a three-phase grid-connected load circuit breaker 105 are arranged in the control box, an input end of the three-phase grid-connected load circuit breaker 104 and an input end of the three-phase grid-connected load circuit breaker 105 are both connected with a grid-connected connection point, and an output end of the three-phase grid-connected load circuit breaker 104 and an output end of the three-phase grid-connected load circuit breaker 105 can be respectively connected with different three-phase grid-connected loads. For example, the three-phase grid-connected load circuit breaker 104 may be connected to a power input of a charging pile to supply power to the charging pile, and the three-phase grid-connected load circuit breaker 105 may be connected to a power input of a heat pump to supply power to the heat pump. When the three-phase grid-connected load circuit breaker is closed, the three-phase grid-connected load circuit breaker can supply power to the connected three-phase grid-connected load, and when the three-phase grid-connected load circuit breaker is disconnected, the three-phase grid-connected load can be powered off and shut down. As shown in fig. 3, the three-phase grid-connected load circuit breaker 104 may be a normal 4P circuit breaker, the three-phase grid-connected load circuit breaker 105 may be a 4P smart circuit breaker, and the three-phase grid-connected load circuit breaker 105 is in communication with the controller 101, and is closed when receiving a closing command sent by the controller 101, and is opened when receiving an opening command sent by the controller 101, so as to control the start or stop of the connected three-phase grid-connected load. The three-phase grid-connected load breaker 105 may monitor power consumption data such as current and voltage of the heat pump and transmit the data to the controller 101. The number of the three-phase grid-connected load circuit breakers can be set according to the number of the three-phase grid-connected loads, and the three-phase grid-connected loads can be any types of three-phase loads.

One or more single-phase grid-connected load circuit breakers 106 can be further arranged in the control box to distribute power for the single-phase grid-connected loads. In fig. 2, a plurality of single-phase grid-connected load circuit breakers 106 are provided, an input end of each single-phase grid-connected load circuit breaker 106 is connected to a grid-connected connection point, and an output end of each single-phase grid-connected load circuit breaker 106 may be connected to a power input end of a different single-phase grid-connected load. The single-phase grid-connected load can be loads such as a power socket, a lighting lamp and the like, and can also be other types of single-phase grid-connected loads. The single-phase grid-connected load circuit breaker can be a common 2P circuit breaker, such as a single-phase grid-connected load circuit breaker 1062 shown in fig. 3, and can supply power to single-phase grid-connected loads such as a power socket; the single-phase grid-connected load circuit breaker may also be a 1P circuit breaker, such as the intelligent circuit breaker 1061 shown in fig. 3, where the intelligent circuit breaker 1061 is in communication connection with the controller 101, and is closed when receiving a closing instruction sent by the controller 101, and is opened when receiving an opening instruction sent by the controller 101, so as to control the start or stop of the connected single-phase grid-connected load. The smart circuit breaker 1061 may monitor power consumption data such as current and voltage of the connected single-phase grid-connected load, and transmit the data to the controller 101. The single-phase grid-connected load circuit breaker can also be a common single-phase circuit breaker 1063 shown in fig. 3, and is used for connecting a common single-phase grid-connected load. The number of the single-phase grid-connected load circuit breakers can be set according to the number of the single-phase grid-connected loads, the types of the single-phase grid-connected load circuit breakers can be set according to requirements, and the single-phase grid-connected loads can be single-phase loads of any types.

Optionally, a single-phase master control circuit breaker 107 may be further included in the control box, an input end of the single-phase master control circuit breaker 107 is connected to an output end of the photovoltaic grid-connected circuit breaker 103 and an output end of the grid circuit breaker 102, respectively, and an output end of the single-phase master control circuit breaker 107 is connected to an input end of the single-phase grid-connected load circuit breaker 106.

In one embodiment, a single-phase main control breaker 107 may be further disposed in the control box to control all single-phase grid-connected loads. As shown in fig. 2, the single-phase general control circuit breaker 107 may be a 4P circuit breaker, an input end of the single-phase general control circuit breaker 107 may be connected to a grid connection point, and an output end of each pole of the single-phase general control circuit breaker 107 may be connected to an input end of one or more single-phase grid connection load circuit breakers 106. When the single-phase master control circuit breaker 107 is disconnected, all single-phase grid-connected loads are powered off and shut down; when the single-phase master control circuit breaker 107 and the single-phase grid-connected load circuit breaker 106 are closed, power can be supplied to the single-phase grid-connected load connected with the single-phase grid-connected load circuit breaker 106. The single-phase master control circuit breaker 107 can facilitate users to control all single-phase grid-connected loads, meanwhile, the single-phase master control circuit breaker 107 can expand single-phase connection points, and a large number of single-phase grid-connected load circuit breakers 106 are conveniently arranged in the control box to connect a large number of single-phase grid-connected loads.

Wherein, single-phase circuit breaker 107 of always controlling has the earth leakage protection function, and the output of single-phase circuit breaker 107 of always controlling takes place personnel to electrocute or the equipment electric leakage to the power supply branch road between the single-phase load of being incorporated into the power networks, and when the leakage current of circuit exceeded the default current, single-phase circuit breaker 107 of always controlling can break off rapidly to avoid human and equipment to receive harm.

In this embodiment, the grid-connected load may include a common grid-connected load and a controllable grid-connected load, and the controller 101 may be directly connected to the controllable grid-connected load to control the controllable grid-connected load to start or stop, or connected to a grid-connected load breaker connected to the controllable grid-connected load to control the controllable grid-connected load to start or stop through the grid-connected load breaker. For example, the controller may be an Internet of Things (Internet of Things IOT) controller, the charging pile and the heat pump are both controllable loads, the three-phase grid-connected load breaker 105 is an intelligent breaker, and the controller 101 and the three-phase grid-connected load breaker 105 may be in communication connection through wired communication or wireless communication. The three-phase grid-connected load breaker 105 may be closed after receiving a close signal sent by the controller 101, power the connected heat pump, start the heat pump operation, and open after receiving an open signal sent by the controller 101, power off the heat pump to stop. Meanwhile, the controller 101 and the charging pile can be connected in a wired communication or wireless communication mode, a starting instruction or a stopping instruction can be directly sent to the charging pile, the charging pile can be started after receiving a starting signal sent by the controller 101 to charge connected equipment, and the charging pile is stopped after receiving a stopping instruction sent by the controller 101 to stop charging the connected equipment. As shown in fig. 3, the single-phase grid-connected load may also include a controllable grid-connected load and a common grid-connected load. For example, a power socket in the single-phase grid-connected load is a controllable grid-connected load, and the controller can be in communication connection with the power socket through wired communication or wireless communication, and sends a start instruction or a stop instruction to the power socket to control the power socket to start or stop. Alternatively, the controller may be communicatively connected to the smart circuit breaker 1061 by wired or wireless communication, and send a closing command or an opening command to the smart circuit breaker 1061 to control the start or stop of the grid-connected load connected to the smart circuit breaker 1061.

It should be noted that the controller may be in communication connection with the circuit breaker and the grid-connected load through Wireless communication manners such as Wireless Fidelity (WIFI) and bluetooth, or may also be in communication connection with the circuit breaker and the grid-connected load through an RS485 interface and a Local Area Network (LAN) interface by using a twisted pair cable or an RS485 communication cable, and the specific manners of Wireless communication and wired communication may be set according to requirements, which is not limited in this embodiment.

Optionally, a photovoltaic off-grid circuit breaker 108 is further included in the control box; the input end of the photovoltaic off-grid circuit breaker 108 is used for being connected with the off-grid output end of the inverter 201; the output end of the photovoltaic off-grid circuit breaker 108 is used for connecting an off-grid load to continuously supply power to the off-grid load.

The off-grid load is generally an important load, and under the condition of public power grid failure, the photovoltaic system can supply power to the off-grid load uninterruptedly. Off-grid loads such as uninterruptible power supplies or important lighting fixtures. The off-grid load can be a three-phase off-grid load or a single-phase off-grid load.

For example, as shown in fig. 2, a photovoltaic off-grid circuit breaker 108 may be disposed in the control box, the photovoltaic off-grid circuit breaker 108 is, for example, a 4P circuit breaker, and an input of the photovoltaic off-grid circuit breaker 108 may be connected to an off-grid output of the inverter 201 to obtain power provided by the photovoltaic system from the inverter 201. The output end of the photovoltaic off-grid circuit breaker 108 can be directly connected with the power input end of an off-grid load to supply power to the off-grid load. Alternatively, one or more off-grid load circuit breakers 109 may be disposed in the control box, and the off-grid load circuit breaker 109 may be a single-phase off-grid load circuit breaker or a three-phase off-grid load circuit breaker. As shown in fig. 2, the single-phase off-grid load circuit breaker 109 is a 1P circuit breaker, an input end of the single-phase off-grid load circuit breaker 109 is connected to an output end of the photovoltaic off-grid circuit breaker 108, and an output end of the single-phase off-grid load circuit breaker 109 is connected to a power input end of a single-phase off-grid load.

Optionally, a network access device 110 may be further included in the control box, and the controller 101 is communicatively connected to the network access device 110 for connecting to a network through the network access device 110.

In one embodiment, a network access device 110 may be provided in the control box, through which the controller 101 may connect to the network. As shown in fig. 2 and 3, the network access device 110 is, for example, a Power Line Communication (PLC) modem, and the controller 101 is communicatively connected to the PLC modem, and may be connected to an ethernet network via the PLC modem. The network access device may also be other types of network access devices such as a router. The controller may also be directly connected to The network through a fourth Generation mobile communication technology (4G) or a fifth Generation mobile communication technology (5G), and a specific manner of connecting The controller to The network may be set according to requirements, which is not limited in this embodiment.

Optionally, a switch 111 may be further included in the control box, and the controller 101 is communicatively connected to the grid-connected load breaker and the grid-connected load through the switch 111.

As shown in fig. 4, fig. 4 shows a communication principle schematic diagram of a controller in an embodiment of the present invention, the controller 101 may be in communication connection with devices such as an intelligent load, a heat pump, and a charging pile through a switch, and may also be in communication connection with a modem through a switch. When the switch is arranged in the control box, the communication connection between the controller and other equipment can be facilitated. A part of network ports, also called local area network interfaces, can be reserved in the switch, which is convenient for the user to expand the devices in the control box.

Optionally, a switching power supply 112 may be further included in the control box, and an input end of the switching power supply 112 is connected with an output end of one of the single-phase grid-connected load circuit breakers; an output of the switching power supply 112 is connected to a power supply input of the controller 101 for providing a supply voltage to the controller 101.

In this embodiment, a switching power supply 112 may be disposed in the control box, and the switching power supply 112 may convert the voltage to provide a power supply voltage for the controller 101 and other devices. As shown in fig. 2, the power supply voltage of the controller 101 is, for example, a direct current voltage of 24V, an input terminal of the switching power supply 112 is connected to an output terminal of one of the single grid-connected load circuit breakers, an output terminal of the switching power supply 112 is connected to a power supply input terminal of the controller 101, and the switching power supply 112 may convert the 180V alternating current output by the connected single grid-connected load circuit breaker into a direct current of 24V to provide the direct current supply voltage of 24V for the controller 101. The switching power supply can also supply power for direct-current electric equipment for power supply voltages of switches and the like in the control box, and the switching power supply can be arranged to provide matched power supply voltage for the direct-current electric equipment in the control box conveniently. The supply voltage output by the switching power supply may also be a dc supply voltage of 36V or 12V, and the specific type of the supply voltage output by the switching power supply may be set according to requirements, which is not limited in this embodiment.

Optionally, the control box may further include a monitoring device 113 and a current transformer 114, where a voltage sampling end of the monitoring device 113 is connected to the grid-connected connection point to obtain a voltage parameter of the grid-connected connection point; the current transformer 114 is arranged at the input end of the power grid circuit breaker 102, and the current sampling end of the monitoring device 113 is connected with the current transformer 114, so that the current parameter of the public power grid side is collected through the current transformer 114, and the system power of the grid-connected connection point is determined according to the voltage parameter and the current parameter; the monitoring device 113 is communicatively connected to the inverter 201, and is configured to transmit the system power to the inverter 201, so that the inverter 201 controls the output power of the grid-connected output according to the system power.

The grid-connected connection point is a connection point between the power grid circuit breaker and the photovoltaic grid-connected circuit breaker. The common grid side is the input side of the grid breaker.

In an embodiment, a monitoring device 113 is further disposed in the control box, the monitoring device 113 is, for example, a smart meter, and a voltage sampling terminal of the smart meter is connected to output terminals of the grid breaker 102 and the photovoltaic grid breaker 103, so as to collect voltage parameters of a grid connection point. As shown in fig. 2, the number of the current transformers 114 is three, and each current transformer 114 is disposed at one phase input end of the grid breaker 102, and may collect a current parameter at the input end of the grid breaker 102, that is, a current parameter at the common grid side. Meanwhile, the smart meter is in communication connection with the inverter 201, after the smart meter collects the current parameters and the voltage parameters, the smart meter can calculate the power parameters of the grid-connected connection point and then send the power parameters to the inverter 201, and the inverter 201 can control the output power of the grid-connected output end of the inverter 201 according to the power parameters so as to control the power provided to the power supply network.

Where the control box may include the housing 100 and the electronics described above in the examples, a neutral terminal row 115 and a ground terminal row 116 may also be provided in the control box, as well as other types of electronics.

Optionally, the controller is in communication connection with the server, and the controller is further configured to receive a control instruction sent by the server.

In one embodiment, the controller may further be in communication connection with the server, and receive a control instruction sent by the server to control the grid-connected load. As shown in fig. 4, the controller is connected to the ethernet network through a modem, through which the server can be connected. The controller is connected with the grid-connected load circuit breaker and/or the grid-connected load, and the controller can be used for controlling the on-off state of the grid-connected load to the server. With reference to the above example, the controller is connected to the three-phase grid-connected load circuit breaker 105, and when the controller controls the three-phase grid-connected load circuit breaker 105 to be closed, the controller determines that the heat pump connected to the three-phase grid-connected load circuit breaker 105 is in an on state, and when the controller controls the three-phase grid-connected load circuit breaker 105 to be opened, the controller determines that the heat pump connected to the three-phase grid-connected load circuit breaker 105 is in an off state. The controller can send the starting state and the stopping state of the heat pump to the server, the server forwards the starting state and the stopping state of the heat pump to the mobile phone and/or the computer and other terminal equipment used by a user, and the user can operate the terminal equipment to send a starting instruction or a stopping instruction corresponding to the heat pump to the server according to the requirement. The server can transmit a received starting instruction or stopping instruction corresponding to the heat pump to the controller, and the controller can control the heat pump to start or stop after receiving the starting instruction or stopping instruction corresponding to the heat pump, so that the heat pump is started or stopped remotely.

As shown in fig. 4, the controller can be in communication connection with different devices through different communication modes, with the inverter and the charging pile through an RS485 interface, with the intelligent power socket and the intelligent circuit breaker through WiFi, and with the heat pump, the intelligent load, the modem and the bidirectional electric meter through the switch. The controller may further integrate a plurality of communication interfaces such as a data input/output (DI/DO) interface, a Universal Serial Bus (USB) interface, an RS232 interface, and a PCIE (Peripheral Component Interconnect Express) interface, so as to connect a grid-connected load or other devices except the grid-connected load. Meanwhile, a part of RS485 interfaces and DI/DO interfaces can be reserved in the controller, so that the user can conveniently expand the equipment in the control box.

In this embodiment, the controller may monitor data such as current, power, and power consumption of each controllable load in the power supply loop. With the above example, when the controller is in communication connection with controllable loads such as the charging pile, data such as current, power and electricity consumption of the controllable loads can be obtained from the controllable loads; when the controller is connected with the intelligent circuit breaker connected with the controllable load, the intelligent circuit breaker can monitor the current, power, electricity consumption and other data of the controllable load, and the controller can acquire the current, power, electricity consumption and other data of the controllable load through the intelligent circuit breaker connected with the controllable load. Meanwhile, the controller can send the parameters of the current, the power, the electricity consumption and the like of the controllable load to the server, the server forwards the data to the terminal equipment used by the user, and the user can directly check the parameters of the current, the power, the electricity consumption and the like of the controllable load through a visual user interface in the terminal equipment.

In one embodiment, the controller can automatically control the grid-connected load to start or stop according to the power generation amount of the photovoltaic system. As shown in fig. 4, the controller is in communication connection with the inverter in the photovoltaic system through an RS485 interface, and parameters such as power generation power and power generation amount of the photovoltaic system, and stored power and charge and discharge parameters of the energy storage battery can be obtained through the inverter. The controller can automatically start part of grid-connected loads when the generating capacity of the photovoltaic system is large, and automatically close part of grid-connected loads when the generating capacity of the photovoltaic system is small. For example, when the amount of power generated by the photovoltaic system is large in the daytime, the controller may send a close command to the three-phase grid-connected load circuit breaker 105 to control the heat pump to start and store heat. When the power generation amount of the photovoltaic system is low at night, the controller can send a disconnection instruction to the three-phase grid-connected load circuit breaker 105 to control the heat pump to stop, and can also control unnecessary single-phase grid-connected loads in the power supply circuit to stop. For another example, when the stored electric quantity of the energy storage battery is large and the generated energy of the photovoltaic system is large, the controller can control the charging pile to improve the charging power so as to charge the equipment quickly. Meanwhile, the controller is in communication connection with the server, the controller can send data such as power generation power, generated energy, storage capacity and charging and discharging parameters of the energy storage battery of the photovoltaic system, power and electricity consumption of the grid-connected load to the server, the server forwards the data to terminal equipment used by a user, and the user can observe the data through a visual interface and remotely control the grid-connected load according to requirements. The method for automatically controlling the electric equipment in the power supply loop by the controller may be set according to the requirement, and this embodiment does not limit this.

The controller can be further in communication connection with a bidirectional ammeter, the bidirectional ammeter is used for acquiring power consumption parameters input by an electric network side, and the controller can acquire the power consumption parameters from the bidirectional ammeter and send the power consumption parameters to a server of an electric power company, so that the electric power company can acquire the power consumption parameters conveniently.

In this embodiment, the control box includes controller, electric wire netting circuit breaker, photovoltaic grid-connected circuit breaker to and a plurality of load circuit breaker that is incorporated into the power networks. The input end of the power grid breaker is used for connecting a public power grid so as to access the public power grid; the input end of the photovoltaic grid-connected circuit breaker is used for being connected with the grid-connected output end of an inverter in a photovoltaic system. The input end of the grid-connected load circuit breaker is respectively connected with the output end of the power grid circuit breaker and the output end of the photovoltaic grid-connected circuit breaker, and the output end of the grid-connected load circuit breaker is used for being connected with a grid-connected load to supply power for the grid-connected load. The controller is connected with a grid-connected load circuit breaker connected with a grid-connected load and/or connected with the grid-connected load, and the controller is used for sending a control instruction to the grid-connected load circuit breaker connected with the grid-connected load or sending the control instruction to the grid-connected load so as to control the start or stop of the grid-connected load. The controller can control the grid-connected load to start or stop according to requirements, so that the automatic control of the grid-connected load is realized, and the automatic control of the load can be realized.

The embodiment also provides a light storage and power supply system, which comprises the control box in the above example, a photovoltaic module, an inverter and an energy storage battery; the photovoltaic module is connected with the inverter and used for providing power supply for the inverter; the inverter is connected with the energy storage battery and used for inputting the power supply provided by the photovoltaic module into the energy storage battery.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

The embodiments of the present invention have been described with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, which are only illustrative and not restrictive, and those skilled in the art can make many forms without departing from the scope of the present invention, and these forms are all within the protection scope of the present invention.

Claims (10)

1. A control box, comprising: the system comprises a controller, a power grid circuit breaker, a photovoltaic grid-connected circuit breaker and a plurality of grid-connected load circuit breakers;

the input end of the power grid breaker is used for connecting a public power grid so as to access the public power grid;

the input end of the photovoltaic grid-connected circuit breaker is used for connecting the grid-connected output end of an inverter in a photovoltaic system;

the input end of the grid-connected load circuit breaker is respectively connected with the output end of the power grid circuit breaker and the output end of the photovoltaic grid-connected circuit breaker, and the output end of the grid-connected load circuit breaker is used for connecting a grid-connected load to supply power for the grid-connected load;

the controller is connected with at least one of the grid-connected load circuit breaker or the grid-connected load, and is used for sending a control instruction to the grid-connected load circuit breaker or at least one of the grid-connected loads so as to control the start or stop of the grid-connected loads.

2. The control box of claim 1, further comprising a photovoltaic off-grid circuit breaker; the input end of the photovoltaic off-grid circuit breaker is used for being connected with the off-grid output end of the inverter; the output end of the photovoltaic off-grid circuit breaker is used for being connected with an off-grid load so as to continuously supply power to the off-grid load.

3. The control box of claim 1, wherein the grid-tied load circuit breaker comprises a three-phase grid-tied load circuit breaker and/or a single-phase grid-tied load circuit breaker; the grid-connected load comprises a three-phase grid-connected load and/or a single-phase grid-connected load;

the output end of the three-phase grid-connected load circuit breaker is used for being connected with the power input end of the three-phase grid-connected load; and the output end of the single-phase grid-connected load circuit breaker is used for being connected with the power input end of the single-phase grid-connected load.

4. The control box of claim 3, further comprising a single-phase master control circuit breaker, wherein the input end of the single-phase master control circuit breaker is connected with the output end of the photovoltaic grid-connected circuit breaker and the output end of the grid-connected circuit breaker respectively, and the output end of the single-phase master control circuit breaker is connected with the input end of the single-phase grid-connected load circuit breaker.

5. The control box of claim 4, further comprising a switching power supply, an input of the switching power supply being connected to an output of one of the single-phase grid-connected load circuit breakers; and the output end of the switching power supply is connected with the power input end of the controller and is used for providing power supply voltage for the controller.

6. The control box of claim 1, further comprising a network access device, the controller communicatively coupled to the network access device for connecting to a network through the network access device.

7. The control box of claim 1, further comprising a switch, the controller communicatively coupled to the grid load circuit breaker and the grid load via the switch.

8. The control box of claim 1, further comprising a monitoring device and a current transformer, wherein a voltage sampling end of the monitoring device is connected with a grid-connected connection point to obtain a voltage parameter of the grid-connected connection point; the grid-connected connection point is a connection point between the power grid circuit breaker and the photovoltaic grid-connected circuit breaker;

the current transformer is arranged at the input end of the power grid circuit breaker, and the current sampling end of the monitoring device is connected with the current transformer so as to acquire current parameters of the public power grid side through the current transformer and determine the system power of the grid-connected connection point according to the voltage parameters and the current parameters;

the monitoring equipment is in communication connection with the inverter and is used for sending the system power to the inverter so that the inverter controls the output power of the grid-connected output end according to the system power.

9. The control box of claim 1, wherein the controller is communicatively coupled to a server, and the controller is further configured to receive the control command sent by the server.

10. A light storage and power supply system, characterized by comprising a control box according to any one of claims 1 to 9, and a photovoltaic module, an inverter and an energy storage battery; the photovoltaic module is connected with the inverter and used for providing power for the inverter; the inverter is connected with the energy storage battery and used for inputting the power supply provided by the photovoltaic module into the energy storage battery.

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