Combiner box for perovskite power station

Abstract

The utility model relates to a combiner box for a perovskite power station, which comprises a box body, and a plurality of groups of positive and negative terminal extension socket pairs, a plurality of groups of positive and negative pole fuses, a plurality of groups of three-section change-over switches, a plurality of groups of anti-reverse diodes, an RS485 communication multi-path direct current collector, a direct current cut-off switch, an RS485 communication voltage acquisition module and a direct current high-voltage power supply module are arranged in the box body. And each group of positive and negative terminal extension socket pairs is externally connected with a perovskite solar energy group string formed by connecting a plurality of perovskite solar energy assemblies in series and is in conductive communication with the perovskite solar energy group string. According to the utility model, direct current generated during power generation of each group of perovskite solar energy group strings is independently monitored in real time, direct current voltage on an output anode bus and an output cathode bus is acquired in real time through the RS485 communication voltage acquisition module, and output direct current is acquired in real time through the RS485 communication multi-path direct current acquisition device. Signals of the direct current and the voltage collected in real time are fed back to a control room in an RS485 communication mode, and real-time monitoring of power generation data of all the perovskite solar module strings is achieved.

Description

Technical Field

[0001] The utility model belongs to perovskite solar modules and relates to a busbar box for perovskite power stations. Background Art

[0002] Perovskite solar modules are different from traditional crystalline silicon modules. The voltage of perovskite solar modules is relatively large while the current is relatively small. Usually, the open-circuit voltage of perovskite solar modules is 200V, the short-circuit current is only 0.7A, and the maximum power point current is 0.6A. Therefore, for a 1500V inverter, 7 perovskite solar modules need to be connected in series to form a perovskite solar string, and then 20 perovskite solar strings need to be connected in parallel before they can be connected to the inverter. The way of first series connection and then parallel connection makes the wiring of perovskite solar modules quite complex and is very prone to errors in actual operation. If there are errors or looseness in the wiring, it is not only very difficult to be detected, but also very difficult to conduct on-site detection and analysis. Summary of the Utility Model

[0003] The technical problem to be solved by the utility model is to provide a busbar box for perovskite power stations, which can quickly connect in parallel multiple perovskite solar strings formed by connecting perovskite solar modules in series, and can quickly find the position of connection errors or connection looseness after parallel connection, eliminate potential safety hazards and improve work efficiency.

[0004] The present utility model is implemented as follows. A busbar box for a perovskite power station is provided, which includes a box body. Inside the box body, multiple sets of positive and negative terminal row sockets, multiple sets of positive and negative fuses, multiple sets of three-stage switching switches, multiple sets of anti-reverse diodes, an RS485 communication multi-channel DC current collector, and a DC cut-off switch are arranged. Each set of positive and negative terminal row sockets is externally connected to a perovskite solar string formed by connecting multiple perovskite solar modules in series for conductive connection. Each set of positive and negative fuses is electrically connected to the corresponding set of positive and negative terminal row sockets through wires. The wires connected to each set of negative fuses are respectively electrically connected to the negative busbar. One end of the negative busbar is electrically connected to the negative terminal of the DC cut-off switch. The wires connected to each set of positive fuses are respectively electrically connected to the input ends of the corresponding set of three-stage switching switches. One of the output terminals of each set of three-stage switching switches is electrically connected to the input end of the corresponding set of anti-reverse diodes. The output end of each set of anti-reverse diodes is electrically connected to the input end of the RS485 communication multi-channel DC current collector through a wire. The output end of the RS485 communication multi-channel DC current collector is connected to the positive terminal of the DC cut-off switch through the positive busbar by a wire. The positive terminal and the negative terminal of the DC cut-off switch respectively form the positive and negative output terminals of the busbar box through wires. An RS485 communication voltage acquisition module and a DC high-voltage power supply module are also arranged inside the box body. The positive terminal port of the IN4 input of the RS485 communication voltage acquisition module is electrically connected to the positive busbar through a wire, and the negative terminal port of the IN4 input is electrically connected to the negative busbar through a wire. The positive terminal port of the OUT output of the DC high-voltage power supply module is electrically connected to the other output terminal of each set of three-stage switching switches through a wire, and the negative terminal port of the OUT output is electrically connected to the negative busbar through a wire. Alternating current is input to the IN1 input terminal of the DC high-voltage power supply module. An RS485 port is arranged on the RS485 communication multi-channel DC current collector. Correspondingly, an RS485 port is arranged on the RS485 communication voltage acquisition module. The RS485 port of the RS485 communication multi-channel DC current collector is interconnected with the RS485 port of the RS485 communication voltage acquisition module through a network cable. The RS485 port of the RS485 communication voltage acquisition module is also connected to the control room network through a network cable.

[0005] Furthermore, a DC low-voltage power supply module is also arranged inside the box body. The OUT1 output terminal of the DC low-voltage power supply module is electrically connected to the IN3 input terminal of the RS485 communication voltage acquisition module. The OUT2 output terminal of the DC low-voltage power supply module is electrically connected to the IN input terminal of the RS485 communication multi-channel DC current collector. Alternating current is input to the IN1 input terminal of the DC low-voltage power supply module.

[0006] Furthermore, the alternating current input to the IN1 input terminal of the DC low-voltage power supply module is AC220V, and the DC24V low-voltage direct current is respectively output from the OUT1 output terminal and the OUT2 output terminal.

[0007] Further, a power supply start interlock signal port IN2 is provided on the DC high-voltage power supply module, and the power supply start interlock signal port IN2 is interlocked with the on-off signal of the DC cut-off switch.

[0008] Further, twenty sets of positive and negative terminal row plugs are provided in the box. Correspondingly, twenty sets of positive and negative fuses, twenty sets of three-stage switching switches, and twenty sets of reverse-blocking diodes are provided in the box.

[0009] Further, the input of the IN1 input terminal of the DC high-voltage power supply module is AC220V alternating current, and the output of its OUT output terminal is DC1500V high-voltage direct current.

[0010] Further, the third output terminal of each of the three-stage switching switches is an empty contact.

[0011] Compared with the prior art, the busbar box for a perovskite power station of the present utility model includes a box body, in which multiple sets of positive and negative terminal row sockets, multiple sets of positive and negative fuses, multiple sets of three-stage switching switches, multiple sets of anti-reverse diodes, an RS485 communication multi-channel DC current collector, a DC cut-off switch, an RS485 communication voltage acquisition module, and a DC high-voltage power supply module are arranged. Each set of positive and negative terminal row sockets is externally connected to a perovskite solar string formed by connecting multiple perovskite solar modules in series in a conductive manner. Each set of positive and negative terminal row sockets is connected in series with the positive and negative fuses of the corresponding set. Each negative fuse is respectively conductively connected to the negative terminal of the DC cut-off switch through a negative bus. After each positive fuse is connected in series with the three-stage switching switch and the anti-reverse diode of the corresponding set, it is then connected to the RS485 communication multi-channel DC current collector, and then conductively connected to the positive terminal of the DC cut-off switch through a positive bus. The positive terminal port of the OUT output of the DC high-voltage power supply module is conductively connected to one of the other output terminals of each set of three-stage switching switches through a wire, and its negative terminal port of the OUT output is conductively connected to the negative bus through a wire. The positive terminal port of the IN4 input of the RS485 communication voltage acquisition module is conductively connected to the positive bus through a wire, and its negative terminal port of the IN4 input is conductively connected to the negative bus through a wire. An RS485 port is arranged on the RS485 communication multi-channel DC current collector. Correspondingly, an RS485 port is arranged on the RS485 communication voltage acquisition module. The two RS485 ports are connected through a network cable. The RS485 port of the RS485 communication voltage acquisition module is also connected to the control room network through a network cable. The present utility model can independently and real-time monitor the DC current generated during the power generation of each perovskite solar string. The DC voltage on the output positive and negative buses is real-time collected through the RS485 communication voltage acquisition module, and the output DC current is real-time collected through the RS485 communication multi-channel DC current collector. The real-time collected DC current and voltage both feedback signals to the control room through the RS485 communication method, realizing the real-time monitoring of the power generation data of each perovskite solar string.

[0012] On the other hand, the present utility model sets a DC high-voltage power supply module. Under the condition of disconnecting the DC cut-off switch, the DC high-voltage power supply from the outside is sequentially applied to each perovskite solar string through multiple sets of three-stage switching switches. It can not only perform EL tests on the perovskite solar modules in the string, but also confirm whether there are abnormalities in each perovskite solar module in the string. It is judged whether there is attenuation in the perovskite solar photovoltaic modules in the string through the current value and voltage value after power-on, and a drone is used to confirm whether each perovskite solar photovoltaic module in the string is damaged. Description of the Drawings

[0013] Figure 1 It is a schematic circuit diagram of the busbar box for a perovskite power station of the present utility model. Detailed implementation mode

[0014] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0015] Please refer to Figure 1 As shown, a preferred embodiment of the busbar box for a perovskite power station of the present utility model includes a box body (not shown in the figure), and a plurality of positive and negative terminal row plugs 1, a plurality of positive and negative fuses 2, a plurality of three-stage switching switches 3, a plurality of anti-reverse diodes 4, an RS485 communication multi-channel DC current collector 5, a DC cut-off switch 6, an RS485 communication voltage acquisition module 7, a DC high-voltage power supply module 8 and a DC low-voltage power supply module 9 are arranged in the box body.

[0016] Each positive and negative terminal row plug 1 is externally connected to a perovskite solar string (not shown in the figure) composed of a plurality of perovskite solar modules connected in series, and the positive and negative terminals of each perovskite solar string are respectively conductively connected to the positive terminal port 101 and the negative terminal port 102 of the corresponding positive and negative terminal row plug 1. In this embodiment, a perovskite solar string is composed of seven perovskite solar modules connected in series.

[0017] Each positive and negative fuse 2 is respectively conductively connected to the corresponding positive and negative terminal row plug 1 through a wire. The wires connected to each negative fuse 21 are respectively conductively connected to the negative bus 10, and one end of the negative bus 10 is conductively connected to the negative terminal 61 of the DC cut-off switch 6. The wires connected to each positive fuse 22 are respectively conductively connected to the input end 31 of the corresponding three-stage switching switch 3. One output terminal 32 of each three-stage switching switch 3 is conductively connected to the input end of the corresponding anti-reverse diode 4. The output end of each anti-reverse diode 4 is conductively connected to the input end of the RS485 communication multi-channel DC current collector 5 through a wire. The output end of the RS485 communication multi-channel DC current collector 5 is wire-connected to the positive terminal 62 of the DC cut-off switch 6 through the positive bus 11. The positive terminal 62 and the negative terminal 61 of the DC cut-off switch respectively form the positive and negative output ends of the busbar box through wires.

[0018] The positive terminal port of the IN4 input of the RS485 communication voltage acquisition module 7 is electrically connected to the positive bus 11 through a wire, and the negative terminal port of the IN4 input is electrically connected to the negative bus 10 through a wire. The positive terminal port of the OUT output of the DC high-voltage power supply module 8 is electrically connected to another output terminal 33 of each group of three-stage switching switches 3 through a wire, and the negative terminal port of the OUT output is electrically connected to the negative bus 10 through a wire. The IN1 input terminals of the DC high-voltage power supply module and the DC low-voltage power supply module are respectively input with alternating current.

[0019] An RS485 port is set on the RS485 communication multi-channel DC current collector 5. Correspondingly, an RS485 port is set on the RS485 communication voltage acquisition module 7. The RS485 port of the RS485 communication multi-channel DC current collector 5 is interconnected with the RS485 port of the RS485 communication voltage acquisition module 7 through a network cable 12. The RS485 port of the RS485 communication voltage acquisition module 7 is also network-connected to the control room (not shown in the figure) through the network cable 12.

[0020] The OUT1 output terminal of the DC low-voltage power supply module 9 is electrically connected to the IN3 input terminal of the RS485 communication voltage acquisition module 7, and the OUT2 output terminal of the DC low-voltage power supply module 9 is electrically connected to the IN input terminal of the RS485 communication multi-channel DC current collector 5.

[0021] The AC220V alternating current is input to the IN1 input terminal of the DC low-voltage power supply module 9, and the DC24V low-voltage direct current is respectively output from the OUT1 output terminal and the OUT2 output terminal. The AC220V alternating current comes from the power grid of the perovskite power station.

[0022] A power supply start interlock signal port IN2 is set on the DC high-voltage power supply module 8, and the power supply start interlock signal port IN2 is interlocked with the on-off signal of the DC cut-off switch 6.

[0023] As Figure 1 shown, in this embodiment, twenty groups of positive and negative terminal block pairs 1 are set in the box. Correspondingly, twenty groups of positive and negative fuses 2, twenty groups of three-stage switching switches 3, and twenty groups of anti-reverse diodes 4 are set in the box.

[0024] The AC220V alternating current is input to the IN1 input terminal of the DC high-voltage power supply module 8, and the DC1500V high-voltage direct current is output from the OUT output terminal. The AC220V alternating current comes from the power grid of the perovskite power station.

[0025] The DC high-voltage power supply module 8 provides the power required for EL testing of each perovskite solar string. Its start signal comes from the DC cut-off switch 6 with auxiliary contacts. Only when the DC cut-off switch 6 is in the off state can this power supply module start.

[0026] The third output terminal (not shown in the figure) of each three-stage changeover switch 3 is an empty contact.

[0027] The positive and negative fuses 2 and the anti-reverse diode 4 are provided to prevent the current backflow phenomenon of other perovskite solar strings caused by the breakage, low power, etc. of a certain perovskite solar module in each perovskite solar string, and to provide the safety of the circuit.

[0028] The RS485 communication multi-channel DC current collector 5 can measure multi-channel DC current signals. It uses Hall current sensors for perforated input, and each channel is isolated from each other. The output signal is transmitted through the RS485 bus mode.

[0029] The switch body of the DC cut-off switch 6 is a cut-off switch. By installing an auxiliary contact module beside the body, the closing and opening of the auxiliary contact are controlled by the linkage of the cut-off switch handle of the body.

[0030] The RS485 communication voltage acquisition module 7 can measure high-voltage DC voltage signals, and the output signal is transmitted through the RS485 bus mode.

[0031] The DC low-voltage power supply module 9 provides power for the RS485 communication multi-channel DC current collector 5 and the RS485 communication voltage acquisition module 7.

[0032] The RS485 port is a common industrial control communication interface. It can support multiple different protocols, such as Modbus, CAN, Profibus, etc. Its features are that it can support multi-point connections of multiple devices, can achieve long-distance transmission, has good anti-interference ability, and can support higher-speed transmission.

[0033] Generally speaking, the usage scenario of the present utility model is as follows:

[0034] Multiple perovskite solar cell strings are respectively conductively connected to the positive and negative terminal rows by plugging in pairs 1. The negative pole of each perovskite solar cell string passes through the negative fuse 21 and then converges into the DC cut-off switch 6 through the negative bus 10. Its positive pole enters the three-way switch 3 after passing through the positive fuse 22. Through the three-way switch 3, the positive pole can be selectively connected to the anti-reverse diode 4, the DC high-voltage power supply module 8 or an empty contact. If the three-way switch 3 is connected to the anti-reverse diode 4, the perovskite solar cell string can generate electricity and supply power outward through the output terminal. If the three-way switch 3 is connected to the DC high-voltage power supply module 8, the EL test can be performed on the perovskite solar cell string. If the three-way switch 3 is connected to an empty contact, the connection between the perovskite solar cell string and other circuits is disconnected.

[0035] The positive pole of the perovskite solar cell string is connected to the anti-reverse diode 4 and then enters the RS485 communication multi-channel DC current collector 5. The real-time current of each perovskite solar cell string and the real-time voltage after parallel connection are transmitted to the control room through RS485 communication, realizing the real-time monitoring of the power generation data of each perovskite solar cell string.

[0036] The positive pole of the string coming out of the RS485 communication multi-channel DC current collector 5 converges through the positive bus and enters the DC cut-off switch 6. The DC cut-off switch 6 controls the positive bus and the negative bus in a linked manner, and at the same time controls the output of the DC high-voltage power supply module 8 through the auxiliary contact of the DC cut-off switch 6, realizing that the DC high-voltage power supply module 8 stops working during the day when each perovskite solar cell string generates electricity, and the DC high-voltage power supply module 8 can work at night when each perovskite solar cell string stops generating electricity to perform the EL test on each perovskite solar cell string. The purpose of the auxiliary contact is to prevent the conflict between the DC power supply for battery power generation and EL test when the DC cut-off switch 6 is closed, and damage related devices.

[0037] The power supply of the RS485 communication multi-channel DC current collector 5 is the DC24V power supply output by the DC low-voltage power supply module 9. Both the DC high-voltage power supply module 8 and the DC low-voltage power supply module 9 use the AC220V output by the perovskite power station inverter as the input power supply.

[0038] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A combiner box for a perovskite power station, comprising a box body, characterized in that: Multiple groups of positive and negative terminal strips, multiple groups of positive and negative fuses, multiple groups of three-stage switches, multiple groups of anti-reverse diodes, RS485 communication multi-channel DC current collectors, and DC disconnect switches are arranged in the box. Each group of positive and negative terminal strips is respectively connected to a perovskite solar cell string composed of multiple perovskite solar panels connected in series, and each group of positive and negative fuses is respectively conductively connected to the positive and negative terminal strips of the corresponding group through a wire, and the wires connected to each group of negative fuses are respectively conductively connected to the negative bus, and one end of the negative bus is connected to the DC disconnect switch. The negative terminal of the switch is conductively connected, the wire connected to each group of positive fuses is conductively connected to the input terminal of the corresponding group of three-stage switching switches, one of the output terminals of each group of three-stage switching switches is conductively connected to the input terminal of the corresponding group of anti-reverse diodes, the output terminal of each group of anti-reverse diodes is conductively connected to the input terminal of the RS485 communication multi-channel DC current collector through a wire, the output terminal of the RS485 communication multi-channel DC current collector is connected to the positive terminal wire of the DC disconnect switch through the positive bus, and the positive terminal and negative terminal of the DC disconnect switch are conductively connected. The positive and negative output ends of the combiner box are respectively formed by wires; an RS485 communication voltage acquisition module and a DC high-voltage power supply module are also arranged in the box body, the positive port of the IN4 input of the RS485 communication voltage acquisition module is conductively connected to the positive bus through a wire, and the negative port of its IN4 input is conductively connected to the negative bus through a wire, the positive port of the OUT output of the DC high-voltage power supply module is conductively connected to another output terminal of each group of three-stage switching switches through a wire, and the negative port of its OUT output is conductively connected to the negative bus through a wire, and AC power is input to the IN1 input end of the DC high-voltage power supply module; an RS485 port is arranged on the RS485 communication multi-channel DC current collector, and correspondingly, an RS485 port is arranged on the RS485 communication voltage acquisition module, the RS485 port of the RS485 communication multi-channel DC current collector is interconnected with the RS485 port of the RS485 communication voltage acquisition module through a network cable, and the RS485 port of the RS485 communication voltage acquisition module is also connected to the control room network through a network cable.

2. The combiner box for a perovskite power station according to claim 1, characterized in that: A DC low-voltage power supply module is also arranged in the box, the OUT1 output terminal of the DC low-voltage power supply module is conductively connected to the IN3 input terminal of the RS485 communication voltage acquisition module, the OUT2 output terminal of the DC low-voltage power supply module is conductively connected to the IN input terminal of the RS485 communication multi-channel DC current collector, and the IN1 input terminal of the DC low-voltage power supply module inputs AC power.

3. The combiner box for a perovskite power station according to claim 2, characterized in that: The input terminal IN1 of the DC low-voltage power supply module is AC220V alternating current, and the output terminals OUT1 and OUT2 thereof respectively output DC24V low-voltage direct current.

4. The combiner box for a perovskite power station according to claim 1, characterized in that: A power startup interlock signal port IN2 is provided on the DC high voltage power supply module, and the power startup interlock signal port IN2 is interlocked with the on / off signal of the DC disconnect switch.

5. The combiner box for a perovskite power station according to claim 1, characterized in that: Twenty sets of positive and negative terminal blocks are arranged in the box, and correspondingly, twenty sets of positive and negative fuses, twenty sets of three-stage switching switches, and twenty sets of anti-reverse diodes are arranged in the box.

6. The combiner box for a perovskite power station according to claim 1, characterized in that: The input terminal IN1 of the DC high-voltage power supply module inputs AC220V alternating current, and the output terminal OUT thereof outputs DC1500V high-voltage direct current.

7. The combiner box for a perovskite power station according to claim 1, characterized in that: The third output terminal of each group of three-stage switching switches is a null contact.

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