CN115276213A - Three-level leakage protection system and method for distributed photovoltaic system - Google Patents
Three-level leakage protection system and method for distributed photovoltaic system Download PDFInfo
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- CN115276213A CN115276213A CN202111419940.0A CN202111419940A CN115276213A CN 115276213 A CN115276213 A CN 115276213A CN 202111419940 A CN202111419940 A CN 202111419940A CN 115276213 A CN115276213 A CN 115276213A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/52—Testing for short-circuits, leakage current or ground faults
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
- H02J13/00022—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using wireless data transmission
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- Photovoltaic Devices (AREA)
Abstract
The invention discloses a three-level leakage protection system and a three-level leakage protection method for a distributed photovoltaic system. Wherein, this system includes: the intelligent monitoring system comprises an intelligent monitoring module and an intelligent monitoring box; the intelligent monitoring module comprises a monitoring main control module and a direct current leakage detection module; the monitoring main control module is used for sampling the direct current leakage current detection module, sending an action signal to the mechanical action mechanism through program judgment, and receiving and sending data with the Internet of things communication module; the direct current leakage detection module is used for monitoring leakage current of an external bus through the non-contact sensor and detecting various leakage currents including alternating current and direct current; the intelligent monitoring box comprises a monitoring main control module and a detection module; the monitoring main control module is used for sampling the detection part of data and uploading corresponding data to the communication module; the detection module comprises a current detection unit and a B-type leakage current detection unit, and the monitoring main control module and the detection module detect the bus current and the AC/DC leakage current in a non-contact mode.
Description
Technical Field
The invention relates to the technical field of photovoltaic power generation, in particular to a three-level leakage protection system and a three-level leakage protection method for a distributed photovoltaic system.
Background
At present, a common distributed photovoltaic system is mainly structurally composed of a photovoltaic panel, an inverter, an alternating current combiner box and a grid-connected cabinet. The current generated by the photovoltaic panel is inverted into alternating current by the inverter, is concentrated by the combiner box, and is finally transmitted to a power grid by the grid-connected cabinet. At present, no better solution is provided for the problem of alternating current/direct current leakage possibly generated by distributed photovoltaic in the working process, and the main problems are as follows: (1) the detection capability for the leakage current of alternating current and direct current is weak. Most of the current leakage protection devices are alternating current leakage protection type devices, which are difficult to play a protection role under direct current leakage and have failure risks; (2) there is an override trip problem. Because the electric leakage detection precision of each inverter is low, when a certain group of photovoltaic panels has electric leakage faults, tripping operation of a grid-connected cabinet or an alternating current combiner box can be caused, and safety problems and economic losses are caused; (3) the current and leakage current data acquisition capability is weak, and the informatization degree is insufficient. Information of each branch is not collected and analyzed, the operation condition of the distributed photovoltaic system cannot be visually displayed, and therefore rapid fault positioning and early-stage prevention cannot be carried out.
Disclosure of Invention
According to the invention, a three-level leakage protection system and a three-level leakage protection method for a distributed photovoltaic system are provided, so as to solve the problem of alternating current and direct current leakage which is possibly generated in the working process of distributed photovoltaic in the prior art, and no better solution is provided at present.
According to a first aspect of the present invention, a three-level leakage protection system for a distributed photovoltaic system is provided, which includes an intelligent monitoring module and an intelligent monitoring box;
the intelligent monitoring module comprises a mechanical part and an electronic part, wherein the electronic part comprises a monitoring main control module and a direct current leakage detection module;
the monitoring main control module is used for sampling the direct current leakage current detection module, sending an action signal to the mechanical action mechanism through program judgment, and receiving and sending data with the Internet of things communication module;
the direct current leakage detection module is used for monitoring leakage current of an external bus through the non-contact sensor and detecting various leakage currents including alternating current and direct current;
the intelligent monitoring box comprises a monitoring main control module and a detection module;
the monitoring main control module is used for sampling the data of the detection part and uploading corresponding data to the communication module;
the detection module comprises a current detection unit and a B-type leakage current detection unit, and the monitoring main control module and the detection module detect bus current and alternating current and direct current leakage current in a non-contact mode.
Optionally, the electronic part further includes an internet of things communication module, and the internet of things communication module is configured to receive the master control module signal, send the master control module signal through a wireless network, receive the signal, and transmit the signal to the monitoring master control module.
Optionally, the intelligent monitoring box further comprises a communication module, and the communication module is used for receiving the information of the monitoring main control module and transmitting the information through a wireless network.
Optionally, the electronic part further comprises a power module, and the power module is used for getting power through an external bus and supplying energy to the monitoring main control module, the internet of things communication module and the direct current leakage detection module.
Optionally, the mechanical part comprises a bidirectional overcurrent protection module and a mechanical action mechanism;
the bidirectional overcurrent protection module is used for carrying out overcurrent protection on current flowing into and out of the photovoltaic power grid under the condition of countercurrent of the photovoltaic power grid;
optionally, the mechanical action mechanism is switched on and off by an operating handle, and is turned off after receiving the action signal.
Optionally, the intelligent monitoring box further comprises a power supply module for taking power through a plug and supplying electric energy to the monitoring main control module, the detection module and the communication module.
According to another aspect of the present invention, there is also provided a three-level leakage protection method for a distributed photovoltaic system, including:
an intelligent monitoring module and an intelligent monitoring box are deployed in a grading manner;
collecting state information and collected data of each device through an Internet of things system, and deploying the Internet of things information;
through the cloud platform intelligent monitoring distributed photovoltaic power station, the intelligent monitoring module and the intelligent monitoring box are displayed in a topological network of the distributed photovoltaic power station, the running states, the monitoring data and the operation and maintenance data of the intelligent monitoring module and the intelligent monitoring box are respectively standardized, and faults are positioned, marked and alarmed.
Optionally, the intelligent monitoring module and the intelligent monitoring box are deployed in a hierarchical manner, and the intelligent monitoring module and the intelligent monitoring box comprise:
determining that an intelligent monitoring module and an intelligent monitoring box are deployed on a photovoltaic panel and an inverter as a first-level deployment;
determining that an intelligent monitoring module and an intelligent monitoring box are deployed at the AC combiner box as second-level deployment;
and determining that the intelligent monitoring module and the intelligent monitoring box are deployed as a third level in the cabinet combination network.
Optionally, collecting status information and collected data of each device through an internet of things system, and deploying the internet of things information includes:
networking through an intelligent monitoring module and a communication module in the intelligent monitoring box;
installing an Internet of things communication base station in a distributed photovoltaic power station for signal networking;
and uploading data to a cellular mobile communication network GSM according to the Internet of things communication base station, and transmitting the data to the Internet according to the cellular mobile communication network GSM.
The data are integrated through the background cloud platform, operation and maintenance personnel can access the data through the mobile terminal or the PC terminal, and real-time remote monitoring is conducted on the condition of the distributed photovoltaic power grid.
Therefore, the photovoltaic panel, the inverter, the alternating current combiner box and the grid-connected cabinet are protected in a grading mode through the intelligent monitoring module with the alternating current and direct current leakage function and the intelligent monitoring box, and a communication network and a management platform are built for leakage current data detection and analysis. The problem of alternating current and direct current electric leakage which is possibly generated in the working process of distributed photovoltaic in the prior art is solved.
Drawings
A more complete understanding of exemplary embodiments of the present invention may be had by reference to the following drawings in which:
fig. 1 is a schematic diagram of an intelligent monitoring module according to the present embodiment;
fig. 2 is a schematic diagram of the intelligent monitoring box according to the embodiment;
fig. 3 is a schematic diagram of a three-level leakage protection method for a distributed photovoltaic system according to this embodiment;
fig. 4 is a schematic diagram of a data transmission system according to the present embodiment;
fig. 5 is a schematic diagram of a structure of the dc leakage protection monitoring method according to this embodiment.
Detailed Description
Example embodiments of the present invention will now be described with reference to the accompanying drawings, however, the invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, which are provided for a complete and complete disclosure of the invention and to fully convey the scope of the invention to those skilled in the art. The terms used in the exemplary embodiments shown in the drawings are not intended to limit the present invention. In the drawings, the same unit/element is denoted by the same reference numeral.
Unless otherwise defined, terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Further, it will be understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense.
According to a first aspect of the present invention, a three-level leakage protection system of a distributed photovoltaic system is provided, which includes an intelligent monitoring module and an intelligent monitoring box;
the intelligent monitoring module comprises a mechanical part and an electronic part, wherein the electronic part comprises a monitoring main control module and a direct current leakage detection module;
the monitoring main control module is used for sampling the direct current leakage current detection module, sending an action signal to the mechanical action mechanism through program judgment, and receiving and sending data with the Internet of things communication module;
the direct current leakage detection module is used for monitoring leakage current of an external bus through the non-contact sensor and detecting various leakage currents including alternating current and direct current;
the intelligent monitoring box comprises a monitoring main control module and a detection module;
the monitoring main control module is used for sampling the data of the detection part and uploading corresponding data to the communication module;
the detection module comprises a current detection unit and a B-type leakage current detection unit, and the monitoring main control module and the detection module detect bus current and alternating current and direct current leakage current in a non-contact mode.
Specifically, as shown in fig. 1, an intelligent monitoring module. The intelligent monitoring module comprises a mechanical part 110 and an electronic part 120, wherein the mechanical part 110 is connected with the electronic part 120, and the electronic part 120 can control the action of the mechanical part 110 through a control command.
The mechanical part 110 includes a bidirectional overcurrent protection module 111 and a mechanical action mechanism 112. The bidirectional overcurrent protection module 111 can perform overcurrent protection on current flowing into and out of the photovoltaic power grid in case of backflow of the photovoltaic power grid. The mechanical actuator 112 may be switched on and off by the operating handle and switched off upon receipt of an actuation signal.
The electronic part 120 comprises a power supply module 121, a main control module 122, an internet of things communication module 123 and a B-type electric leakage detection module 124. The power module 121 takes power through an external bus and supplies energy to the remaining modules. The main control module 122 samples the direct current leakage detection module 124, determines to send an action signal to the mechanical action mechanism 112 through a program, and performs data transceiving with the internet of things communication module 123. The internet of things module 123 receives the signals from the main control module 122, sends the signals through a wireless network, receives the signals, and transmits the signals to the main control module 122. The dc leakage current detection module 124 monitors leakage current of the external bus through the non-contact sensor, and can detect various leakage currents including ac and dc.
As shown in fig. 2, an intelligent monitoring box. The intelligent monitoring box comprises a power supply module 240, a main control module 220, a detection module 210 and a communication module 230. The power supply module 240 takes power through a plug and supplies electric energy to other modules. The communication module 230 is connected to the main control module 220, and receives the information from the main control module 220 and transmits the information through a wireless network. The main control module 220 is connected to the detection module 210 and the communication module 230, and is configured to sample data of the detection module 210 and upload corresponding data to the communication module 230.
The detection part 210 includes a current detection unit 211 and a direct current leakage current detection unit 212. The two modules detect bus current and alternating current and direct current leakage current in a non-contact mode.
Therefore, the photovoltaic panel, the inverter, the alternating current combiner box and the grid-connected cabinet are protected in a grading mode through the intelligent monitoring module with the alternating current and direct current leakage function and the intelligent monitoring box, and a communication network and a management platform are built for leakage current data detection and analysis. The problem of alternating current and direct current electric leakage which is possibly generated in the working process of the distributed photovoltaic system in the prior art is solved.
Optionally, the electronic part further includes an internet of things communication module, and the internet of things communication module is configured to receive the master control module signal, send the master control module signal through a wireless network, receive the signal, and transmit the signal to the monitoring master control module.
Optionally, the intelligent monitoring box further includes a communication module, and the communication module is configured to receive information from the monitoring main control module and transmit the information through a wireless network.
Optionally, the electronic part further comprises a power module, and the power module is used for getting power through an external bus and supplying energy to the monitoring main control module, the internet of things communication module and the direct current leakage detection module.
Optionally, the mechanical part comprises a bidirectional overcurrent protection module and a mechanical action mechanism;
the bidirectional overcurrent protection module is used for carrying out overcurrent protection on current flowing into and out of the photovoltaic power grid under the condition of countercurrent of the photovoltaic power grid;
optionally, the mechanical action mechanism is switched on and off by an operating handle, and is switched off after receiving the action signal.
Optionally, the intelligent monitoring box further comprises a power supply module for taking power through a plug and supplying electric energy to the monitoring main control module, the detection module and the communication module.
Therefore, the photovoltaic panel, the inverter, the alternating current combiner box and the grid-connected cabinet are protected in a grading mode through the intelligent monitoring module with the alternating current and direct current leakage function and the intelligent monitoring box, and a communication network and a management platform are built for leakage current data detection and analysis. The problem of alternating current and direct current electric leakage which is possibly generated in the working process of the distributed photovoltaic system in the prior art is solved.
According to another aspect of the present invention, there is provided a three-level leakage protection method 300 for a distributed photovoltaic system, as shown in fig. 3, the method 300 comprising:
s301, arranging intelligent monitoring modules and intelligent monitoring boxes in a grading manner;
s302, collecting state information and collected data of each device through an Internet of things system, and deploying the Internet of things information;
and S303, intelligently monitoring the distributed photovoltaic power station through the cloud platform, displaying the intelligent monitoring module and the intelligent monitoring box in a topological network of the distributed photovoltaic power station, respectively standardizing the running states of the intelligent monitoring module and the intelligent monitoring box, monitoring data and operation and maintenance data thereof, and positioning, marking and alarming faults.
Specifically, as shown in fig. 4, a method for information communication and management of the internet of things. The method comprises the following steps:
s1, networking the intelligent monitoring module and the communication module of the intelligent monitoring box by using the Internet of things technology such as LoRa or NB-IoT;
s2, installing an Internet of things communication base station in the distributed photovoltaic power station to perform signal networking;
s3, the Internet of things communication base station uploads the data to a cellular mobile communication network GSM, and the data are transmitted to the Internet;
and S4, integrating the data through a background cloud platform, and accessing the data through a mobile terminal or a PC terminal by operation and maintenance personnel to remotely monitor the condition of the distributed photovoltaic power grid in real time.
As shown in fig. 5, a three-level leakage protection method includes the following steps:
s1, carrying out hierarchical deployment of the intelligent monitoring module and the intelligent monitoring box. The method comprises the following steps that the method is respectively installed on an alternating current side of an inverter, an alternating current header box and a grid-connected box; ()
And S2, deploying the information communication and communication method of the Internet of things. Collecting state information and collected data of each device through an Internet of things system;
and S3, intelligently monitoring the distributed photovoltaic power station through the cloud platform. The platform displays each device in a topological network of the distributed photovoltaic power station, respectively standardizes the operation state of each device, monitors data and other operation and maintenance data, and performs positioning marking and alarming on faults; the user, the operation and maintenance unit and the staff can check the electric leakage condition of the equipment through the PC end or the APP of the mobile phone end without going out of home, and can give an alarm through the PC and the mobile phone terminal in time when an accident or a fault occurs, so that online diagnosis, early warning and processing are realized.
Optionally, the intelligent monitoring module and the intelligent monitoring box are deployed in a hierarchical manner, and the intelligent monitoring module and the intelligent monitoring box comprise:
determining that an intelligent monitoring module and an intelligent monitoring box are deployed on a photovoltaic panel and an inverter as a first-level deployment;
determining that an intelligent monitoring module and an intelligent monitoring box are deployed at the AC combiner box as second-level deployment;
and determining that the intelligent monitoring module and the intelligent monitoring box are deployed as a third level in the cabinet-combination network.
Optionally, collecting status information and collected data of each device through an internet of things system, and deploying the internet of things information includes:
networking through an intelligent monitoring module and a communication module in the intelligent monitoring box;
installing an Internet of things communication base station in a distributed photovoltaic power station for signal networking;
and uploading data to a cellular mobile communication network GSM according to the Internet of things communication base station, and transmitting the data to the Internet according to the cellular mobile communication network GSM.
The data are integrated through the background cloud platform, operation and maintenance personnel can access the data through the mobile terminal or the PC terminal, and real-time remote monitoring is conducted on the condition of the distributed photovoltaic power grid.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein. The scheme in the embodiment of the application can be implemented by adopting various computer languages, such as object-oriented programming language Java and transliterated scripting language JavaScript.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While the preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including the preferred embodiment and all changes and modifications that fall within the scope of the present application.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.
Claims (9)
1. A three-level leakage protection system of a distributed photovoltaic system is characterized by comprising an intelligent monitoring module and an intelligent monitoring box;
the intelligent monitoring module comprises a mechanical part and an electronic part, wherein the electronic part comprises a monitoring main control module and a direct current leakage detection module;
the monitoring main control module is used for sampling the direct current leakage current detection module, sending an action signal to the mechanical action mechanism through program judgment, and receiving and transmitting data with the Internet of things communication module;
the direct current leakage detection module is used for monitoring leakage current of an external bus through the non-contact sensor and detecting various leakage currents including alternating current and direct current;
the intelligent monitoring box comprises a monitoring main control module and a detection module;
the monitoring main control module is used for sampling the data of the detection part and uploading corresponding data to the communication module;
the detection module comprises a current detection unit and a B-type leakage current detection unit, and the monitoring main control module and the detection module detect bus current and alternating current and direct current leakage current in a non-contact mode.
2. The system of claim 1,
the electronic part also comprises an Internet of things communication module, and the Internet of things communication module is used for receiving the signals of the main control module, sending the signals through a wireless network, receiving the signals and transmitting the signals to the monitoring main control module.
3. The system of claim 1,
the intelligent monitoring box also comprises a communication module, and the communication module is used for receiving the information of the monitoring main control module and transmitting the information through a wireless network.
4. The system of claim 1,
the electronic part further comprises a power module, wherein the power module is used for getting electricity through an external bus and supplying energy to the monitoring main control module, the Internet of things communication module and the direct current electric leakage detection module.
5. The system of claim 1,
the mechanical part comprises a bidirectional overcurrent protection module and a mechanical action mechanism;
the bidirectional overcurrent protection module is used for carrying out overcurrent protection on current flowing into and out of the photovoltaic power grid under the condition of countercurrent of the photovoltaic power grid;
the mechanical action mechanism is switched on and off by an operating handle and is used for switching off after receiving an action signal.
6. The system of claim 1, wherein the first and second sensors are disposed in a common housing,
the intelligent monitoring box further comprises a power supply module for taking power through a plug and supplying electric energy to the monitoring main control module, the detection module and the communication module.
7. A three-level leakage protection method for a distributed photovoltaic system is characterized by comprising the following steps:
an intelligent monitoring module and an intelligent monitoring box are deployed in a grading manner;
collecting state information and collected data of each device through an Internet of things system, and deploying the Internet of things information;
through the cloud platform intelligent monitoring distributed photovoltaic power station, the intelligent monitoring module and the intelligent monitoring box are displayed in a topological network of the distributed photovoltaic power station, the running states, the monitoring data and the operation and maintenance data of the intelligent monitoring module and the intelligent monitoring box are respectively standardized, and faults are positioned, marked and alarmed.
8. The method of claim 7, wherein the step of deploying the smart monitoring modules and the smart monitoring boxes in a hierarchical manner comprises:
determining that an intelligent monitoring module and an intelligent monitoring box are deployed on a photovoltaic panel and an inverter as a first-level deployment;
determining that an intelligent monitoring module and an intelligent monitoring box are deployed at the AC combiner box as second-level deployment;
and determining that the intelligent monitoring module and the intelligent monitoring box are deployed as a third level in the cabinet combination network.
9. The method of claim 8, wherein collecting status information and collected data of each device through an internet of things system, and deploying the internet of things information comprises:
networking through the intelligent monitoring module and the communication module in the intelligent monitoring box;
installing an Internet of things communication base station in a distributed photovoltaic power station for signal networking;
and uploading data to a cellular mobile communication network GSM according to the Internet of things communication base station, and transmitting the data to the Internet according to the cellular mobile communication network GSM.
The data are integrated through the background cloud platform, operation and maintenance personnel can access the data through the mobile terminal or the PC terminal, and real-time remote monitoring is conducted on the condition of the distributed photovoltaic power grid.
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| CN202111419940.0A CN115276213A (en) | 2021-11-26 | 2021-11-26 | Three-level leakage protection system and method for distributed photovoltaic system |
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