CN-122001294-A - Photovoltaic module control device, method, equipment and medium

CN122001294ACN 122001294 ACN122001294 ACN 122001294ACN-122001294-A

Abstract

The invention provides a photovoltaic module control device, a method, equipment and a medium, and relates to the technical field of photovoltaics, wherein the device comprises an interaction module, a control module and a switch module; the control module is electrically connected with the control module, the control module is also electrically connected with the switch module, the switch module is also respectively electrically connected with each photovoltaic module and the inverter, the interaction module is used for sending control signals to the control module when receiving the interaction signals, the control module is used for sending switch signals to the switch module when receiving the control signals, the switch signals comprise turn-off signals, and the switch module is used for being turned off when receiving the turn-off signals, so that each photovoltaic group string is respectively disconnected with the inverter, and each photovoltaic module in the same photovoltaic group string is disconnected in pairs. The invention realizes the quick turn-off of the photovoltaic module.

Inventors

ZANG JUNLIN
Jiang Sushu
ZHANG FUWEI
ZHU KEXIN

Assignees

上海尤汶新能源有限公司

Dates

Publication Date: 20260508
Application Date: 20241108

Claims (10)

1. The photovoltaic module control device is characterized by being applied to a photovoltaic power generation system, wherein the photovoltaic power generation system comprises an inverter and a plurality of photovoltaic group strings electrically connected with the inverter, each photovoltaic group string respectively comprises a plurality of photovoltaic modules connected in series, and the device comprises an interaction module, a control module and a switch module; The interaction module is electrically connected with the control module; the control module is also electrically connected with the switch module; the switch module is also respectively and electrically connected with each photovoltaic module and the inverter; the interaction module is used for sending a control signal to the control module when receiving the interaction signal; the control module is used for sending a switching signal to the switching module when receiving the control signal, wherein the switching signal comprises a turn-off signal; the switch module is used for being disconnected when the turn-off signal is received, so that each photovoltaic group string is disconnected with the inverter respectively, and each photovoltaic component in the same photovoltaic group string is disconnected in pairs.
2. The photovoltaic module control device of claim 1, further comprising a power module electrically connected to the interaction module, the control module, and the switch module, respectively; the power module is used for supplying power to the interaction module, the control module and the switch module respectively.
3. The photovoltaic module control apparatus according to claim 2, wherein the switching module includes a plurality of first switching units and a plurality of second switching units, the number of the first switching units is the same as the number of the photovoltaic group strings, and the number of the second switching units is the same as the number of the photovoltaic modules; The second switch units are respectively connected in series between each photovoltaic group string and the inverter; each photovoltaic module in the same photovoltaic group string is also connected in series with a second switch unit between every two photovoltaic modules; The second switch unit is connected in series between the ith photovoltaic group string and the inverter, and the second switch units are used for connecting a plurality of photovoltaic modules in the ith photovoltaic group string in series and are electrically connected with the same first switch unit, and i is more than or equal to 1; each first switch unit is used for being disconnected when the switch-off signal is received; And each second switch unit in the same photovoltaic group string is used for being disconnected when the corresponding connected first switch unit is disconnected, so that the corresponding photovoltaic group string is disconnected with the inverter, and each photovoltaic module in the corresponding photovoltaic group string is disconnected in pairs.
4. The photovoltaic module control of claim 3, wherein the first switching unit comprises a relay comprising a relay coil and a relay contact; One end of the relay coil is electrically connected with the control module, and the other end of the relay coil is grounded; One end of the relay contact is electrically connected with the power supply module, the other end of the relay contact is electrically connected with each target second switch unit, and each target second switch unit is the second switch unit which is electrically connected with the first switch unit where the relay contact is positioned; the relay coil is used for losing electricity when receiving the turn-off signal; and the relay contact is used for being disconnected when the relay coil is powered off.
5. The photovoltaic module control device of claim 4, wherein the second switching unit comprises a contactor comprising a contactor coil and a contactor contact; One end of the contactor coil is electrically connected with a relay contact of a target first switch unit, the other end of the contactor coil is grounded, and the target first switch unit is the first switch unit electrically connected with the second switch unit where the contactor coil is positioned; the contactor coil is used for losing electricity when a relay contact of the target first switch unit is opened; if the contactor contacts are connected in series between the photovoltaic string and the inverter, the contactor contacts are used for being disconnected when the contactor coil is powered off, so that the photovoltaic string and the inverter are disconnected; And if the contactor contacts are connected in series between two adjacent photovoltaic modules, the contactor contacts are used for being disconnected when the contactor coils are in power failure, so that the two adjacent photovoltaic modules are disconnected.
6. The photovoltaic module control device of any of claims 1-5, wherein the interaction signal comprises a remote communication signal, the interaction module comprising a communication unit electrically connected to the control module; The communication unit is used for sending the control signal to the control module when the remote communication signal is received.
7. The photovoltaic module control device of any of claims 1-5, further comprising an accident-localization module electrically connected to the interaction module; The accident fixed point module is used for determining a target photovoltaic module from a plurality of photovoltaic modules, and sending fixed point signals to the interaction module according to the position of the target photovoltaic module; The interaction module is further used for sending a fixed-point control signal to the control module when receiving the fixed-point signal; The control module is used for determining a target photovoltaic group string according to the fixed-point control signal, wherein the target photovoltaic group string comprises the target photovoltaic component; the switch module is used for controlling the target photovoltaic string to be disconnected with the inverter according to the fixed-point turn-off signal, and the photovoltaic modules in the target photovoltaic group string are disconnected in pairs.
8. A photovoltaic module control method, characterized by being applied to the photovoltaic module control apparatus according to any one of claims 1 to 7, comprising: When receiving the interaction signal, the interaction module sends a control signal to the control module; When the control signal is received, the control module sends a switching signal to the switching module, wherein the switching signal comprises a turn-off signal; When the turn-off signal is received, the switch module is turned off, so that each photovoltaic group string is respectively turned off and connected with the inverter, and each photovoltaic component in the same photovoltaic group string is turned off in pairs.
9. An electronic device comprising a memory and a processor, the memory storing a computer program that, when run on the processor, performs the photovoltaic module control method of claim 8.
10. A computer-readable storage medium, characterized in that the computer-readable storage medium stores a computer program which, when executed by a processor, implements the photovoltaic module control method of claim 8.

Description

Photovoltaic module control device, method, equipment and medium Technical Field The present invention relates to the field of photovoltaic technologies, and in particular, to a photovoltaic module control device, a method, an apparatus, and a medium. Background In the use process of each photovoltaic module forming the photovoltaic power generation system, a direct current arc discharge phenomenon is easy to generate, and the temperature of surrounding devices rises linearly to generate fire. When the photovoltaic power generation system is in fire, if each photovoltaic module is not cut off from the photovoltaic power generation system in time, serious potential safety hazards are caused. Therefore, how to rapidly cut off each photovoltaic module in a photovoltaic power generation system when a safety accident such as a fire occurs becomes a technical problem to be solved. Disclosure of Invention In view of the above, the present invention aims to overcome the defects in the prior art, and provide a photovoltaic module control device, a method, a device and a medium. The invention provides the following technical scheme: in a first aspect, the invention provides a photovoltaic module control device, which is applied to a photovoltaic power generation system, wherein the photovoltaic power generation system comprises an inverter and a plurality of photovoltaic group strings electrically connected with the inverter, each photovoltaic group string respectively comprises a plurality of photovoltaic modules connected in series, and the device comprises an interaction module, a control module and a switch module; the system comprises a control module, an interaction module, a switch module, a photovoltaic module, an inverter, a switching module and a control module, wherein the interaction module is electrically connected with the control module; The control module is used for sending a switching signal to the switching module when receiving the control signal, wherein the switching signal comprises a turn-off signal, and the switching module is used for being disconnected when receiving the turn-off signal, so that each photovoltaic group string is disconnected with the inverter respectively, and each photovoltaic module in the same photovoltaic group string is disconnected pairwise. In one embodiment, the device further comprises a power module electrically connected with the interaction module, the control module and the switch module respectively, and the power module is used for supplying power to the interaction module, the control module and the switch module respectively. In one embodiment, the switch module comprises a plurality of first switch units and a plurality of second switch units, wherein the number of the first switch units is the same as that of the photovoltaic group strings, and the number of the second switch units is the same as that of the photovoltaic modules; The second switch unit is connected in series between the ith photovoltaic group string and the inverter, and the second switch units are used for connecting a plurality of photovoltaic modules in the ith photovoltaic group string in series and are electrically connected with the same first switch unit, and i is more than or equal to 1; And each second switch unit in the same photovoltaic group string is used for being disconnected when the corresponding connected first switch unit is disconnected, so that the corresponding photovoltaic group string is disconnected from the inverter, and each photovoltaic module in the corresponding photovoltaic group string is disconnected from each other. In one embodiment, the first switch unit comprises a relay, wherein the relay comprises a relay coil and a relay contact, one end of the relay coil is electrically connected with the control module, the other end of the relay coil is grounded, one end of the relay contact is electrically connected with the power module, the other end of the relay contact is electrically connected with each target second switch unit, and each target second switch unit is the second switch unit electrically connected with the first switch unit where the relay contact is positioned; The relay coil is used for losing electricity when receiving the turn-off signal, and the relay contact is used for being disconnected when losing electricity. In one embodiment, the second switch unit comprises a contactor, wherein the contactor comprises a contactor coil and a contactor contact, one end of the contactor coil is electrically connected with a relay contact of a target first switch unit, the other end of the contactor coil is grounded, and the target first switch unit is the first switch unit which is electrically connected with the second switch unit where the contactor coil is positioned; If the contactor contacts are connected in series between the photovoltaic string and the inverter, the contactor contacts are used for being disconnected when the contactor coil is