Photovoltaic monitoring device

Abstract

The utility model discloses a photovoltaic monitoring device, which relates to the technical field of photovoltaic control and comprises an off-grid and grid-connected control assembly, an electric energy management assembly and a central control component. The off-grid and grid-connected control assembly is used for being electrically connected to a photovoltaic station, a mains supply and a load and can control the electric energy of the photovoltaic station to be connected to the mains supply or the load. The electric energy management assembly is electrically connected with the off-grid and grid-connected control assembly and the load, and the electric energy management assembly can store the electric energy of the photovoltaic station and can supply the electric energy to the load; and the central control component is connected with the commercial power, can detect the condition of the commercial power, and is also in communication connection with the off-grid and grid-connected control assembly and the electric energy management assembly. The photovoltaic monitoring device provided by the utility model can be combined with commercial power to realize effective utilization of photovoltaic electric energy.

Description

TECHNICAL FIELD

[0001] The utility model relates to photovoltaic control technical field, in particular to a photovoltaic monitoring device. BACKGROUND

[0002] Photovoltaic power generation system takes photovoltaic cell panel as power generation component, adjusts and controls the electric energy through controller, on the one hand, the energy after adjustment is sent to DC load or AC load, on the other hand, the excess energy is sent to storage battery pack storage, when the electric energy cannot satisfy the load needs, the controller sends the electric energy of storage battery to the load again, but the existing photovoltaic power generation system is difficult to combine with commercial power to realize the effective utilization of photovoltaic electric energy. SUMMARY

[0003] The utility model discloses a photovoltaic monitoring device to solve the problem of the prior art, can combine with commercial power to realize the effective utilization of photovoltaic electric energy.

[0004] To achieve the above object, the utility model provides the following scheme:

[0005] The utility model provides a photovoltaic monitoring device, including off grid control assembly, electric energy management assembly and central control part, off grid control assembly is used for electric connection in photovoltaic station, commercial power and load, off grid control assembly can control the electric energy of photovoltaic station and access commercial power or load, electric energy management assembly is connected with off grid control assembly and load electricity, and electric energy management assembly can store the electric energy of photovoltaic station and can supply electric energy to load, central control part is connected with commercial power, and central control part can detect the condition of commercial power, and central control part is also connected with off grid control assembly and electric energy management assembly communication.

[0006] Preferably, off grid control assembly includes electric connection off grid and grid integrated machine and grid-connected inverter, off grid and grid integrated machine is connected with photovoltaic station electricity, and grid-connected inverter can be electrically connected with commercial power, and off grid and grid integrated machine can control the electric energy of photovoltaic station and access load or be inverted to commercial power through grid-connected inverter, electric energy management assembly is connected with off grid and grid integrated machine electricity, and central control part can be connected with off grid and grid integrated machine and grid-connected inverter communication.

[0007] Preferably, electric energy management assembly includes electric connection battery management part and battery module, battery management part can also be connected with off grid control assembly and load electricity, and battery management part can store the electric energy of photovoltaic station to battery module and can supply the electric energy of battery module to load, and central control part is connected with battery management part communication.

[0008] Preferably, the battery management component is arranged as a cascade battery management device; and the battery module is arranged as a cascade battery.

[0009] Preferably, further comprising a communication module, which is in communication connection with the central control component, and the central control component is configured to be in communication connection with a central server through the communication module.

[0010] Preferably, the communication module is arranged as a GPRS module.

[0011] Preferably, when the central control component monitors that the commercial power is not running, the central control component controls the off-grid and grid-connected control assembly to supply the electrical energy of the photovoltaic power station to the load or the electrical energy management assembly; and when the central control component monitors that the commercial power is not running, the central control component controls the off-grid and grid-connected control assembly to connect the electrical energy of the photovoltaic power station to the commercial power.

[0012] Preferably, the central control component is arranged as an embedded processor.

[0013] The utility model discloses relative to prior art has obtained following technical effect:

[0014] The photovoltaic monitoring device provided by the utility model, through the central control component monitors whether the commercial power is running, when the commercial power is running, control off-grid and grid-connected control assembly and supply the electrical energy of photovoltaic power station to the commercial power, when the commercial power is not running, control off-grid and grid-connected control assembly and connect the electrical energy of photovoltaic power station to important load and satisfy the power demand, and the electrical energy management assembly can supply the load and satisfy the power demand when photovoltaic power generation is insufficient, and this can combine photovoltaic power generation and commercial power and realize the effective utilization of photovoltaic electrical energy. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or prior art, the following will briefly introduce the drawings needed to be used in the embodiments, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without paying creative labor.

[0016] Figure 1 The connection schematic diagram of the photovoltaic monitoring device provided for embodiment one.

[0017] In the drawing: 1-off-grid and grid-connected control assembly;11-off-grid and grid-connected integrated machine;12-grid-connected inverter;2-photovoltaic power station;3-commercial power;4-load;5-communication module;6-electrical energy management assembly;61-battery management component;62-battery module;7-central control component. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0019] The present application provides a photovoltaic monitoring device to solve the problems in the prior art and realize effective utilization of photovoltaic power in combination with commercial power.

[0020] In order to make the above-mentioned purposes, features and advantages of the present application more apparent, obvious and easy to understand, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0021] Embodiment one

[0022] The present embodiment provides a photovoltaic monitoring device, please refer to Figure 1 , comprising a grid-connected control component 1, an electric energy management component 6 and a central control component 7; the grid-connected control component 1 is electrically connected to a photovoltaic station 2, commercial power 3 and a load 4, and the grid-connected control component 1 can control the electric energy of the photovoltaic station 2 to access the commercial power 3 or the load 4; the electric energy management component 6 is electrically connected with the grid-connected control component 1 and the load 4, and the electric energy management component 6 can store the electric energy of the photovoltaic station 2 and supply electric energy to the load 4; the central control component 7 is connected with the commercial power 3 and can detect the condition of the commercial power 3, and the central control component 7 is also in communication connection with the grid-connected control component 1 and the electric energy management component 6.

[0023] Specifically, the central control component 7 monitors whether the commercial power is running, when the commercial power is running, the grid-connected control component 1 is controlled to access the electric energy of the photovoltaic station 2 to the commercial power 3 for supply, when the commercial power 3 is not running, the grid-connected control component 1 is controlled to access the electric energy of the photovoltaic station 2 to the important load 4 to meet the power demand, and the excess electric energy is stored in the electric energy management component 6, and the electric energy management component 6 can supply the load 4 to meet the power demand when the photovoltaic power generation is insufficient, so that the photovoltaic power generation and the commercial power can be combined to realize effective utilization of photovoltaic power.

[0024] In an optional solution of the embodiment, preferably, the off-grid and grid-connected control assembly 1 comprises an electrically connected off-grid and grid-connected integrated machine 11 and a grid-connected inverter 12, the off-grid and grid-connected integrated machine 11 is electrically connected with the photovoltaic station 2, the grid-connected inverter 12 is electrically connectable with the commercial power 3, the off-grid and grid-connected integrated machine 11 is capable of controlling the electric energy of the photovoltaic station 2 to access the load 4 or to be inverted to the commercial power 3 through the grid-connected inverter 12; the electric energy management assembly 6 is electrically connected with the off-grid and grid-connected integrated machine 11; the central control component 7 is communicatively connected with the off-grid and grid-connected integrated machine 11 and the grid-connected inverter 12 to read the states and perform control; wherein the central control component 7 is communicatively connected with the off-grid and grid-connected integrated machine 11 through 232 communication and communicatively connected with the grid-connected inverter 12 through 485 communication, when the central control component 7 detects that the commercial power 3 is running, i.e. the commercial power exists, the central control component 7 controls the off-grid and grid-connected integrated machine 11 to input the electric energy of the photovoltaic station 2 to the grid-connected inverter 12, and controls the grid-connected inverter 12 to invert the direct current output by the solar panel to the power grid; conversely, when the central control component 7 detects that the commercial power 3 is not running, i.e. the commercial power does not exist, the central control component 7 controls the off-grid and grid-connected integrated machine 11 to input the electric energy of the photovoltaic station 2 to the electric energy management assembly 6 or the load 4 for storage or utilization; the off-grid and grid-connected integrated machine 11 and the grid-connected inverter 12 both adopt existing components, and their structures are not described in detail.

[0025] In an optional solution of the embodiment, preferably, the electric energy management assembly 6 comprises an electrically connected battery management component 61 and a battery module 62; the battery management component 61 is further electrically connectable with the off-grid and grid-connected control assembly 1 and the load 4, the battery management component 61 is capable of storing the electric energy of the photovoltaic station 2 to the battery module 62, and is capable of supplying the electric energy of the battery module 62 to the load 4; the central control component 7 is communicatively connected with the battery management component 61 through CAN communication; by providing the battery management component 61 and the battery module 62, the storage and utilization of the excess photovoltaic generated electric energy can be satisfied.

[0026] In an optional solution of the embodiment, preferably, the storage battery management component 61 is arranged as a ladder storage battery management device; the storage battery module 62 is arranged as a ladder battery, and the excess solar energy is stored by using the recycled ladder battery, and the important load is powered when there is no commercial power and the solar panel output is insufficient; wherein the ladder storage battery management device and the ladder battery both use existing components, specifically, the ladder storage battery management device includes a battery charging and discharging control board, a battery voltage and current detection board, and a battery equalization board, and the charging and discharging of the ladder battery are controlled by the battery charging and discharging control board; in the process of charging and discharging, the battery pack voltage, the battery pack current, and the voltage of the single battery are detected in real time by using the battery voltage and current detection board, so as to prevent problems such as overvoltage, undervoltage, and overcurrent; in the process of battery use, the power of each single battery is kept effective at all times, which can effectively improve the capacity and utilization of the battery pack, so the battery equalization board needs to equalize each single battery according to the detection result of the detection board on the voltage of each single battery, so as to ensure that the direct voltages of the batteries are basically consistent. The storage battery management component 61 sends the information of the battery pack and each single battery to the central control component 7 through CAN communication, and receives the instruction of the central control component 7.

[0027] In an optional solution of the embodiment, preferably, the photovoltaic monitoring device provided by the embodiment further includes a communication module 5, which is in communication connection with the central control component 7, and the central control component 7 is used for being in communication connection with a center server through the communication module 5; the communication module 5 uploads the data of the photovoltaic station 2 to the center server, so as to be monitored as a whole; 232 communication is adopted between the communication module 5 and the central control component 7.

[0028] In an optional solution of the embodiment, preferably, the communication module 5 is arranged as a GPRS module.

[0029] In an optional solution of the embodiment, preferably, the central control component 7 is arranged as an embedded processor, and the overall control is realized by the embedded processor.

[0030] The principle and implementation mode of the specific examples are described in the utility model, and the above embodiment is only used for helping to understand the method and core idea of the utility model; meanwhile, according to the idea of the utility model, the specific implementation mode and application range will be changed by the general technical personnel in the field. In conclusion, the content of the specification should not be understood as the limitation of the utility model.

Claims

1. A photovoltaic monitoring device, characterized in that: include: A grid-connected control component (1) is used to electrically connect to a photovoltaic power station (2), a mains power supply (3), and a load (4). The grid-connected control component (1) can control the power of the photovoltaic power station (2) to be connected to the mains power supply (3) or the load (4). A power management component (6) is electrically connected to the grid-connected control component (1) and the load (4). The power management component (6) is capable of storing the electrical energy of the photovoltaic power station (2) and supplying electrical energy to the load (4); and The central control unit (7) is connected to the mains power (3) and can detect the status of the mains power (3). The central control unit (7) is also communicatively connected to the grid-connected control component (1) and the power management component (6).

2. The photovoltaic monitoring device according to claim 1, characterized in that: The off-grid and grid-connected control component (1) includes an off-grid and grid-connected integrated unit (11) and a grid-connected inverter (12) that are electrically connected. The off-grid and grid-connected integrated unit (11) is electrically connected to the photovoltaic power station (2), and the grid-connected inverter (12) is electrically connected to the mains power (3). The off-grid and grid-connected integrated unit (11) can control the power of the photovoltaic power station (2) to be connected to the load (4) or to be inverted to the mains power (3) through the grid-connected inverter (12). The power management component (6) is electrically connected to the off-grid and grid-connected integrated unit (11). The central control component (7) is communicatively connected to both the off-grid and grid-connected integrated unit (11) and the grid-connected inverter (12).

3. The photovoltaic monitoring device according to claim 1, characterized in that: The power management component (6) includes a battery management component (61) and a battery module (62) that are electrically connected; the battery management component (61) can also be electrically connected to the grid-connected control component (1) and the load (4); the battery management component (61) can store the power of the photovoltaic power station (2) into the battery module (62) and can supply the power of the battery module (62) to the load (4); the central control component (7) is communicatively connected to the battery management component (61).

4. The photovoltaic monitoring device according to claim 3, characterized in that: The battery management component (61) is configured as a cascade battery management device; the battery module (62) is configured as a cascade battery.

5. The photovoltaic monitoring device according to claim 1, characterized in that: It also includes a communication module (5) that is communicatively connected to the central control unit (7), which is used to communicate with the central server through the communication module (5).

6. The photovoltaic monitoring device according to claim 5, characterized in that: The communication module (5) is configured as a GPRS module.

7. The photovoltaic monitoring device according to claim 1, characterized in that: When the central control unit (7) monitors that the mains power (3) is not running, the central control unit (7) controls the grid connection control component (1) to supply the power of the photovoltaic power station (2) to the load (4) or the power management component (6); when the central control unit (7) monitors that the mains power (3) is not running, the central control unit (7) controls the grid connection control component (1) to connect the power of the photovoltaic power station (2) to the mains power (3).

8. The photovoltaic monitoring device according to claim 1, characterized in that: The central control component (7) is configured as an embedded processor.

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