CN114640540B - Photovoltaic management system and control method thereof - Google Patents

Photovoltaic management system and control method thereof Download PDF

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Publication number
CN114640540B
CN114640540B CN202210382237.5A CN202210382237A CN114640540B CN 114640540 B CN114640540 B CN 114640540B CN 202210382237 A CN202210382237 A CN 202210382237A CN 114640540 B CN114640540 B CN 114640540B
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China
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state
port
unidirectional
control
message
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CN114640540A (en
Inventor
马天祥
段昕
贾静然
李小玉
张姿姿
李丹
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State Grid Corp of China SGCC
Electric Power Research Institute of State Grid Hebei Electric Power Co Ltd
State Grid Hebei Energy Technology Service Co Ltd
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State Grid Corp of China SGCC
Electric Power Research Institute of State Grid Hebei Electric Power Co Ltd
State Grid Hebei Energy Technology Service Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L63/00—Network architectures or network communication protocols for network security
    • H04L63/02—Network architectures or network communication protocols for network security for separating internal from external traffic, e.g. firewalls
    • H04L63/0209—Architectural arrangements, e.g. perimeter networks or demilitarized zones
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
    • H02S40/00—Components or accessories in combination with PV modules, not provided for in groups H02S10/00 - H02S30/00
    • H02S40/30—Electrical components
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/08—Protocols for interworking; Protocol conversion
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/009—Security arrangements; Authentication; Protecting privacy or anonymity specially adapted for networks, e.g. wireless sensor networks, ad-hoc networks, RFID networks or cloud networks
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy

Abstract

The invention provides a photovoltaic management system and a control method thereof. The photovoltaic management system includes: the system comprises a photovoltaic inverter, a station control terminal, an external network control terminal, a communication control device, a signal processing device and a mobile communication module; communication control device for communication control of photovoltaic inverter, photovoltaic inverter includes: an intranet communication interface; the communication control device includes: a unidirectional change-over switch and a switch controller; the unidirectional changeover switch includes: an A end configured to be connected with an intranet communication interface, a B end configured to be connected with an intranet management system terminal, and a C end configured to be connected with a mobile communication module; the states of the unidirectional change-over switch include: a first state in which the end A is connected with the end B, and a second state in which the end A is connected with the end C; the switch controller is connected with the end A and is configured to control the unidirectional change-over switch to switch between a first state and a second state. The invention can realize the physical isolation of the communication between the internal network and the external network of the photovoltaic management system and improve the communication safety.

Description

Photovoltaic management system and control method thereof
The present application claims priority from chinese patent application No. 202210362510.8 entitled "communication control and signal processing device, photovoltaic management system, and control method thereof," filed on 7, 4, 2022, the entire contents of which are incorporated herein by reference.
Technical Field
The invention relates to the technical field of photovoltaic power generation, in particular to a photovoltaic management system and a control method thereof.
Background
With the construction of a novel power system, the distributed photovoltaic access proportion is continuously increased, so that conditions such as heavy overload of a platform area, out-of-limit of power quality, fault foldback power and the like are often caused, and huge hidden hazards are brought to a power grid and personal safety.
The existing distributed photovoltaic is directly connected into the power distribution network through an electric energy meter, basic operation information of the distributed power supply can be obtained only through an electric energy meter acquisition system, the information quantity is small, the information instantaneity is low, the real-time operation state of the distributed photovoltaic cannot be mastered, and the distributed photovoltaic is considerable, measurable, controllable and adjustable due to the lack of effective means. Therefore, when the power grid meets the peak regulation and frequency modulation requirements, flexible regulation cannot be realized, regional photovoltaics can be completely cut off only by cutting off a feeder switch, and the hard processing mode not only causes photovoltaic resource waste to influence annual energy production of users, but also has slower recovery.
The distributed photovoltaic belongs to user equipment, the equipment quantity is large, the communication protocol is complex, the photovoltaic inverter is only provided with a 485 external interface, and the interface is connected with the 4G communication module to realize the communication between the photovoltaic inverter and the external network distributed power supply operation and maintenance master station. It is very difficult to change the existing photovoltaic inverter to realize one-receiving-two-transmitting, and simultaneously meet the operation and maintenance monitoring requirements of photovoltaic inverter manufacturers and the 'considerable, measurable, controllable and adjustable' requirements of a power grid on distributed photovoltaic. In order to solve how to realize information acquisition, distributed power supply monitoring and remote control on the basis of not changing the distributed photovoltaic equipment, at present, an intranet communication module and a 4G communication module are connected into a photovoltaic inverter 485 external interface in a small number of areas, the intranet communication acquisition module acquires photovoltaic inverter information to a platform area intelligent fusion terminal, the platform area intelligent fusion terminal transmits the information to an intranet master station system, the 4G module transmits the information to an extranet distributed power supply operation and maintenance master station, but the method causes interconnection of an internal network system and an external network system at the distributed photovoltaic inverter, and does not meet the safety protection requirement.
Disclosure of Invention
The embodiment of the invention provides a photovoltaic management system and a control method thereof, which are used for solving the problems that interconnection of an internal network system and an external network system is easy to occur at a distributed photovoltaic inverter and safety protection requirements are not met.
In a first aspect, an embodiment of the present invention provides a communication control device for a photovoltaic management system, for communication control of a photovoltaic inverter, the photovoltaic inverter including: an intranet communication interface; the photovoltaic inverter is configured to be in communication connection with an external network control terminal through a mobile communication module; the communication control device includes: a unidirectional change-over switch and a switch controller;
the unidirectional changeover switch includes: an A end configured to be connected with the intranet communication interface, a B end configured to be connected with the intranet management system terminal, and a C end configured to be connected with the mobile communication module; the state of the unidirectional change-over switch comprises: the terminal A is connected with the terminal B in a first state, and the terminal A is connected with the terminal C in a second state;
the switch controller is connected with the A end and is configured to control the unidirectional switch to switch between the first state and the second state.
In one possible implementation manner, the communication control device further includes: and the unidirectional conduction module is configured to control the unidirectional conduction from the C end to the switch controller.
Optionally, the unidirectional conduction module is a unidirectional diode, a unidirectional switch or a unidirectional circuit.
The communication control device provided in this embodiment includes: a unidirectional change-over switch and a switch controller. The one-way change-over switch is connected with an A end connected with an intranet communication interface, a B end connected with an intranet management system terminal and a C end connected with the mobile communication module. The states of the unidirectional change-over switch include: a first state in which the A end is connected with the B end, and a second state in which the A end is connected with the C end. The switch controller is connected with the A end and controls the unidirectional change-over switch to switch between a first state and a second state, so that the control of the connection of the intranet communication interface and the intranet management system terminal or the connection of the mobile communication module and the distributed power operation and maintenance master station or the mobile terminal of the external network is realized. In the process, physical isolation of the communication between the internal network and the external network of the photovoltaic management system is realized through the unidirectional change-over switch, and the communication safety is improved.
In a second aspect, an embodiment of the present invention provides a signal processing apparatus for a photovoltaic management system, including: the device comprises a first port, a second port, a channel selection module and a protocol conversion module;
The first port is configured to be connected with the communication control device and configured to transmit control state information of the communication control device and messages from different terminals;
the channel selection module is respectively connected with the first port, the second port and the protocol conversion module; the channel selection module is configured to transmit the message transmitted by the first port to the protocol conversion module or the second port according to the control state information, and transmit the information transmitted by the second port to the protocol conversion module or the first port according to the control state information.
In one possible implementation, the signal processing apparatus further includes: the file transparent transmission module is respectively connected with the channel selection module, the first port and the second port;
the channel selection module is configured to transmit the message transmitted by the first port to the protocol conversion module or the file transparent transmission module according to the control state information, and transmit the information transmitted by the second port to the protocol conversion module or the file transparent transmission module according to the control state information.
The signal processing apparatus provided in this embodiment includes: the device comprises a first port, a second port, a channel selection module and a protocol conversion module. The first port is connected with the communication control device and transmits control state information of the communication control device and messages from different terminals. The channel selection module transmits the message transmitted by the first port to the protocol conversion module or the second port according to the control state information, and transmits the information transmitted by the second port to the protocol conversion module or the first port according to the control state information. The channel selection module carries out ordered transmission on the messages according to the control state information of the communication control device, so that the communication between the photovoltaic management system and the internal and external networks is not affected.
In another embodiment, an information sensing apparatus is provided, including the communication control apparatus and the communication control apparatus described above;
the communication control device includes: a unidirectional change-over switch and a switch controller;
the unidirectional changeover switch includes: an A end configured to be connected with the intranet communication interface, a B end configured to be connected with the intranet management system terminal, and a C end configured to be connected with the mobile communication module; the state of the unidirectional change-over switch comprises: the terminal A is connected with the terminal B in a first state, and the terminal A is connected with the terminal C in a second state;
The switch controller is connected with the end A and is configured to control the unidirectional switch to switch between the first state and the second state;
the signal processing apparatus includes: the device comprises a first port, a second port, a channel selection module and a protocol conversion module;
the first port is configured to be connected with the communication control device and configured to transmit control state information of the communication control device and messages from different terminals;
the channel selection module is respectively connected with the first port, the second port and the protocol conversion module; the channel selection module is configured to transmit the message transmitted by the first port to the protocol conversion module or the second port according to the control state information, and transmit the information transmitted by the second port to the protocol conversion module or the first port according to the control state information.
In a third aspect, an embodiment of the present invention provides a photovoltaic management system, including: the system comprises a photovoltaic inverter, a station control terminal, an external network control terminal, the communication control device and the signal processing device;
the A end of the communication control device is connected with the first port of the signal processing device; the end B is connected with the platform area control terminal; the C end is connected with the mobile communication module; the communication control device is configured to send control state information to the first port; wherein the control state information includes: the state of the unidirectional change-over switch; or, the state and state maintaining time of the unidirectional change-over switch;
The second port of the signal processing device is connected with an intranet communication interface of the photovoltaic inverter;
the photovoltaic inverter is configured to be communicatively connected to an external network control terminal through the mobile communication module.
The photovoltaic management system provided in this embodiment includes: the system comprises a photovoltaic inverter, a station control terminal, an external network control terminal, the communication control device and the signal processing device. Wherein the communication control device includes: a unidirectional change-over switch and a switch controller. The one-way change-over switch is connected with an A end connected with an intranet communication interface, a B end connected with an intranet management system terminal and a C end connected with the mobile communication module. The states of the unidirectional change-over switch include: a first state in which the A end is connected with the B end, and a second state in which the A end is connected with the C end. The switch controller is connected with the A end and controls the unidirectional change-over switch to switch between a first state and a second state, so that the control of the connection of the intranet communication interface and the intranet management system terminal or the connection of the mobile communication module and the distributed power operation and maintenance master station or the mobile terminal of the external network is realized. In the process, physical isolation of the communication between the internal network and the external network of the photovoltaic management system is realized through the unidirectional change-over switch, and the communication safety is improved. A signal processing apparatus comprising: the device comprises a first port, a second port, a channel selection module and a protocol conversion module. The first port is connected with the communication control device and transmits control state information of the communication control device and messages from different terminals. The channel selection module transmits the message transmitted by the first port to the protocol conversion module or the second port according to the control state information, and transmits the information transmitted by the second port to the protocol conversion module or the first port according to the control state information. The channel selection module carries out ordered transmission on the messages according to the control state information of the communication control device, so that the communication between the photovoltaic management system and the internal and external networks is not affected.
In a fourth aspect, an embodiment of the present invention provides a control method for the above-mentioned photovoltaic management system, for the communication control device, including:
when the input of the pulse signal at the C end is detected, the unidirectional change-over switch is controlled to be converted from the first state to the second state, and a message is forwarded to the signal processing device; the mobile communication module receives a message sent by the external network control terminal;
and after the pulse signal at the C end disappears, controlling the unidirectional change-over switch to recover from the second state to the first state.
In one possible implementation, before the controlling the unidirectional switch to return from the second state to the first state, the method further includes:
and controlling the one-way change-over switch to maintain the second state and continuously setting the first time duration.
The control method provided by the embodiment is mainly used for controlling a communication control device, and when the input of a pulse signal at the C end is detected, the unidirectional change-over switch is controlled to be changed from a first state to a second state, and a message is forwarded to the signal processing device; the pulse signal indicates the mobile communication module to receive a message sent by the external network control terminal. And after the pulse signal at the C end disappears, controlling the unidirectional change-over switch to recover from the second state to the first state. In the process, physical isolation of the communication between the internal network and the external network of the photovoltaic management system is realized through the unidirectional change-over switch, and the communication safety is improved.
In a fifth aspect, an embodiment of the present invention provides a control method for the above-mentioned photovoltaic management system, for the signal processing apparatus, including:
when the first port inputs a message, control state information of the communication control device is acquired, and the message is transmitted to the protocol conversion module or the second port according to the control state information; wherein the control state information includes: the state of the unidirectional change-over switch; or, the state and state maintaining time of the unidirectional change-over switch; the protocol conversion module transmits the converted message to the second port;
when the second port inputs a message, control state information of the communication control device is acquired, and the message is transmitted to the protocol conversion module or the first port according to the control state information; the protocol conversion module transmits the converted message to the first port.
In one possible implementation manner, the transmitting the message to the protocol conversion module or the second port according to the control state information includes:
analyzing the control state information to determine the state of the unidirectional change-over switch;
Transmitting a message to the protocol conversion module when the state of the unidirectional switch is a first state; and when the state of the unidirectional switch is the second state, transmitting the message to the second port.
In one possible implementation manner, the transmitting the packet to the protocol conversion module or the first port according to the control state information includes:
analyzing the control state information to determine the state of the unidirectional change-over switch;
transmitting a message to the protocol conversion module when the state of the unidirectional switch is a first state; transmitting a message to the first port when the state of the unidirectional switch is a second state; or,
analyzing the control state information to determine the state and state maintaining time of the unidirectional change-over switch;
transmitting a message to the protocol conversion module when the state of the unidirectional switch is a first state; when the state of the unidirectional change-over switch is the second state, if the state maintaining time is longer than a second set duration, transmitting a message to the first port; and if the state maintaining time is less than or equal to the second set duration, discarding the message.
The control method provided by the embodiment is mainly used for controlling the signal processing device, when detecting that the first port inputs the message, the control state information of the communication control device is obtained, and the message is transmitted to the protocol conversion module or the second port according to the control state information. Wherein the control state information includes: the state of the unidirectional change-over switch; or, the state and state maintaining time of the unidirectional change-over switch; and the protocol conversion module transmits the converted message to the second port. When the second port inputs the message, the control state information of the communication control device is acquired, and the message is transmitted to the protocol conversion module or the first port according to the control state information. The protocol conversion module transmits the converted message to the first port. The channel selection module sequentially transmits the messages according to the control state information of the communication control device, so that the communication between the photovoltaic management system and the internal and external networks is not affected.
In a sixth aspect, embodiments of the present invention provide a computer readable storage medium storing a computer program which, when executed by a processor, implements the steps of the method as described above in the fourth aspect or any one of the possible implementations of the fourth aspect.
In a seventh aspect, embodiments of the present invention provide a computer readable storage medium storing a computer program which, when executed by a processor, implements the steps of the method as described above in the fifth aspect or any one of the possible implementations of the fifth aspect.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a communication control device for a photovoltaic management system according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a communication control device for a photovoltaic management system according to another embodiment of the present invention;
fig. 3 is a schematic structural diagram of a signal processing device for a photovoltaic management system according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a signal processing device for a photovoltaic management system according to another embodiment of the present invention;
Fig. 5 is a schematic structural diagram of a photovoltaic management system according to an embodiment of the present invention;
FIG. 6 is a flow chart of an implementation of a control method for a photovoltaic management system according to an embodiment of the present invention;
fig. 7 is a flowchart of an implementation of a control method for a photovoltaic management system according to another embodiment of the present invention.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth such as the particular system architecture, techniques, etc., in order to provide a thorough understanding of the embodiments of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.
At present, an intranet communication module and a 4G communication module are connected into a 485 external interface of a photovoltaic inverter in a minority of areas, the intranet communication acquisition module acquires information of the photovoltaic inverter to a platform area intelligent fusion terminal, the platform area intelligent fusion terminal transmits the information to an intranet main station system, the 4G module transmits the information to an extranet distributed power supply operation and maintenance main station, but the method causes interconnection of the intranet system and the extranet system at the distributed photovoltaic inverter, and does not meet the safety protection requirement.
The embodiment of the invention is applied to different types of intranet communication interfaces and communication modules, and optionally, the mobile communication module in the following embodiment is a 4G communication module or a 5G communication module; the intranet communication interface is a 485 interface or other types of interfaces.
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the following description will be made by way of specific embodiments with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of a communication control device for a photovoltaic management system according to an embodiment of the present invention. The communication control device is used for communication control of a photovoltaic inverter, and the photovoltaic inverter comprises: and the intranet communication interface is configured to be in communication connection with the extranet control terminal through the mobile communication module. As shown in fig. 1, the communication control apparatus 1 includes: a unidirectional changeover switch 11 and a switch controller 12.
Wherein, the unidirectional changeover switch 11 includes: an A end configured to be connected with an intranet communication interface, a B end configured to be connected with an intranet management system terminal, and a C end configured to be connected with a mobile communication module. The states of the unidirectional changeover switch 11 include: a first state in which the A end is connected with the B end, and a second state in which the A end is connected with the C end.
The switch controller 12 is connected to the a terminal and configured to control the unidirectional switch 11 to switch between the first state and the second state.
Under normal conditions, the switch controller 12 controls the unidirectional change-over switch 11 to be in a first state, namely, the end A is connected with the end B, the photovoltaic inverter is connected with the terminal of the intranet management system, and the real-time information is transmitted to the intranet management system for processing and storage, so that real-time monitoring and subsequent data analysis are facilitated. When the switch controller 12 detects that the C-terminal receives the information sent by the mobile communication module, the unidirectional switch 11 is controlled to switch to the second state, that is, the a-terminal and the B-terminal are controlled to be disconnected, and the a-terminal and the C-terminal are connected.
In one possible implementation, as shown in fig. 2, the communication control device 1 further includes: the unidirectional conduction module 13 is configured to control unidirectional conduction in the direction from the C terminal to the switch controller 12.
Optionally, the unidirectional conduction module 13 is a unidirectional diode, a unidirectional switch, or a unidirectional circuit. Shown in figure 2 as unidirectional diodes.
The unidirectional diode is connected in series to obtain the electric pulse signal of the C end, and unidirectional fast conduction of the unidirectional diode ensures that the switch controller 12 can rapidly collect the electric pulse signal of the C end, and meanwhile, the electric pulse signal of the A end can be prevented from being transmitted to the C end through the controller. The switch controller 12 of the communication control device 1 transmits the switch state signal to the signal processing device in real time. Specifically, when the C-terminal receives the signal sent by the mobile communication module, an electric pulse signal flows, the unidirectional diode is turned on, the switch controller 12 controls the unidirectional switch 11 to act, the a-terminal and the B-terminal are immediately disconnected, the a-terminal and the C-terminal are turned on, namely, the communication channel is switched to a second state, the rapid switching of the communication channel is ensured, and the physical isolation of the two communication channels is realized. Immediately after the electric pulse signal disappears or after the delay T, the switch controller 12 controls the one-way change-over switch 11 to restore the first state, namely the end A and the end C are disconnected, and the end A and the end B are connected.
The communication control apparatus 1 provided in the present embodiment includes: a unidirectional changeover switch 11 and a switch controller 12. The one-way change-over switch 11 is connected with an A end of the intranet communication interface, a B end of the intranet management system terminal and a C end of the mobile communication module. The states of the unidirectional changeover switch 11 include: a first state in which the A end is connected with the B end, and a second state in which the A end is connected with the C end. The switch controller 12 is connected with the end A and controls the unidirectional change-over switch 11 to switch between a first state and a second state, thereby realizing the control of the connection of an intranet communication interface and an intranet management system terminal, or the connection of the intranet communication interface and a distributed power operation and maintenance master station or a mobile terminal of an external network through a mobile communication module. In the process, the physical isolation of the communication between the inside and outside networks of the photovoltaic management system is realized through the unidirectional change-over switch 11, and the communication safety is improved.
Fig. 3 is a schematic structural diagram of a signal processing device for a photovoltaic management system according to an embodiment of the present invention. As shown in fig. 3, the signal processing apparatus 2 includes: a first port 21, a second port 22, a channel selection module 23 and a protocol conversion module 24.
Wherein the first port 21 is configured to be connected to the communication control device 1 and configured to transmit control status information of the communication control device 1 and messages from different terminals.
The channel selection module 23 is connected to the first port 21, the second port 22 and the protocol conversion module 24, respectively. The channel selection module 23 is configured to transmit the message transmitted by the first port 21 to the protocol conversion module 24 or the second port 22 according to the control status information, and transmit the information transmitted by the second port 22 to the protocol conversion module 24 or the first port 21 according to the control status information.
In one possible implementation, as shown in fig. 4, the signal processing apparatus 2 further includes: the file transparent module 25 is connected to the channel selection module 23, the first port 21 and the second port 22, respectively.
The channel selection module 23 is configured to transmit the message transmitted by the first port 21 to the protocol conversion module 24 or the file transparent module 25 according to the control status information, and transmit the information transmitted by the second port 22 to the protocol conversion module 24 or the file transparent module 25 according to the control status information.
The signal processing device 2 provided in this embodiment has strong self-adaptation, and can process different types of messages through the message transparent transmission module and the protocol conversion module 24, and ensures the sequence of processing.
The signal processing apparatus 2 provided in this embodiment includes: a first port 21, a second port 22, a channel selection module 23 and a protocol conversion module 24. The first port 21 is connected to the communication control apparatus 1, and transmits control state information of the communication control apparatus 1 and messages from different terminals. The channel selection module 23 transmits the message transmitted by the first port 21 to the protocol conversion module 24 or the second port 22 according to the control state information, and transmits the information transmitted by the second port 22 to the protocol conversion module 24 or the first port 21 according to the control state information. The channel selection module 23 sequentially transmits the messages according to the control state information of the communication control device 1, so that the communication between the photovoltaic management system and the internal and external networks is not affected.
In one possible implementation manner, an information sensing apparatus is provided, which includes the communication control apparatus 1 and the signal processing apparatus 2 provided in the foregoing embodiments.
The communication control device 1 includes: a unidirectional changeover switch 11 and a switch controller 12;
the unidirectional changeover switch 11 includes: an A end configured to be connected with the intranet communication interface, a B end configured to be connected with the intranet management system terminal, and a C end configured to be connected with the mobile communication module; the states of the unidirectional changeover switch 11 include: the terminal A is connected with the terminal B in a first state, and the terminal A is connected with the terminal C in a second state;
the switch controller 12 is connected to the a terminal and configured to control the unidirectional switch 11 to switch between the first state and the second state.
The signal processing device 2 includes: a first port 21, a second port 22, a channel selection module 23, and a protocol conversion module 24;
wherein the first port 21 is configured to be connected to the communication control device 1, and configured to transmit control state information of the communication control device 1 and messages from different terminals;
the channel selection module 23 is respectively connected with the first port 21, the second port 22 and the protocol conversion module 24; the channel selection module 23 is configured to transmit the message transmitted by the first port 21 to the protocol conversion module 24 or the second port 22 according to the control status information, and transmit the information transmitted by the second port 22 to the protocol conversion module 24 or the first port 21 according to the control status information.
Fig. 5 is a schematic structural diagram of a photovoltaic management system according to an embodiment of the present invention. The photovoltaic management system as shown in fig. 3 includes: a communication control device 11, a signal processing device 22, a photovoltaic inverter 3, a station control terminal 4, and an external network control terminal 5. The photovoltaic inverter 3 includes an intranet communication interface 31, and is configured to be communicatively connected to an extranet control terminal through a mobile communication module 32.
The a terminal of the communication control device 1 is connected to the first port 21 of the signal processing device 2. And the end B is connected with the station area control terminal 4. The C end is connected with the mobile communication module 32; the communication control device 1 is configured to send control state information to the first port 21.
Wherein the control state information includes: the state of the unidirectional switch 11; or, the state and state maintaining time of the unidirectional changeover switch 11.
The second port 22 of the signal processing device 2 is connected to the intranet communication interface 31 of the photovoltaic inverter 3.
The photovoltaic inverter 3 is configured to be communicatively connected to the external network control terminal 5 through the mobile communication module 32.
The photovoltaic management system provided in this embodiment includes: a photovoltaic inverter 3, a station control terminal 4, an external network control terminal 5, the communication control device 1 and the signal processing device 2. Wherein the communication control device 1 comprises: a unidirectional changeover switch 11 and a switch controller 12. The unidirectional switch 11 has an a end connected to the intranet communication interface 31, a B end connected to the intranet management system terminal, and a C end connected to the mobile communication module 32. The states of the unidirectional changeover switch 11 include: a first state in which the A end is connected with the B end, and a second state in which the A end is connected with the C end. The switch controller 12 is connected with the end a, and controls the unidirectional change-over switch 11 to switch between a first state and a second state, so as to control the intranet communication interface 31 to be connected with an intranet management system terminal, or connected with a distributed power operation and maintenance master station or a mobile terminal of an external network through the mobile communication module 32. In the process, the physical isolation of the communication between the inside and outside networks of the photovoltaic management system is realized through the unidirectional change-over switch 11, and the communication safety is improved. The signal processing device 2 includes: a first port 21, a second port 22, a channel selection module 23 and a protocol conversion module 24. The first port 21 is connected to the communication control apparatus 1, and transmits control state information of the communication control apparatus 1 and messages from different terminals. The channel selection module 23 transmits the message transmitted by the first port 21 to the protocol conversion module 24 or the second port 22 according to the control state information, and transmits the information transmitted by the second port 22 to the protocol conversion module 24 or the first port 21 according to the control state information. The channel selection module 23 sequentially transmits the messages according to the control state information of the communication control device 1, so that the communication between the photovoltaic management system and the internal and external networks is not affected.
Fig. 6 is a flowchart of an implementation of a control method for a photovoltaic management system according to an embodiment of the present invention, for a communication control apparatus 1, the control method includes the following steps:
s601, when the input of the pulse signal at the C end is detected, the unidirectional switch 11 is controlled to be switched from the first state to the second state, and the message is forwarded to the signal processing device 2. Wherein the pulse signal indicates that the mobile communication module 32 receives the message sent by the external network control terminal 5.
S602, after the pulse signal at the C terminal disappears, the unidirectional switch 11 is controlled to return from the second state to the first state.
In a possible implementation manner, before the unidirectional switch 11 is controlled to return from the second state to the first state in step S602, the method further includes:
the unidirectional changeover switch 11 is controlled to maintain the second state for the first set period of time.
The control method provided by the embodiment is mainly used for controlling the communication control device 1, and when the input of the pulse signal at the C end is detected, the unidirectional change-over switch 11 is controlled to be switched from the first state to the second state, and the message is forwarded to the signal processing device 2; wherein the pulse signal indicates that the mobile communication module 32 receives the message sent by the external network control terminal 5. After the pulse signal at the C terminal disappears, the unidirectional switch 11 is controlled to return from the second state to the first state. In the process, the physical isolation of the communication between the inside and outside networks of the photovoltaic management system is realized through the unidirectional change-over switch 11, and the communication safety is improved.
Fig. 7 is a flowchart of an implementation of a control method for a photovoltaic management system according to another embodiment of the present invention, for a signal processing apparatus 2, the control method including the steps of:
s701, when detecting that the first port 21 inputs a message, the control state information of the communication control device 1 is acquired, and the message is transmitted to the protocol conversion module 24 or the second port 22 according to the control state information. Wherein the control state information includes: the state of the unidirectional switch 11; alternatively, the state and state maintaining time of the unidirectional changeover switch 11; the protocol conversion module 24 transmits the converted message to the second port 22.
S702, when detecting that the second port 22 inputs a message, the control state information of the communication control device 1 is acquired, and the message is transmitted to the protocol conversion module 24 or the first port 21 according to the control state information. The protocol conversion module 24 transmits the converted message to the first port 21.
In a possible implementation manner, in step S701, transmitting the message to the protocol conversion module 24 or the second port 22 according to the control status information includes:
analyzing the control state information to determine the state of the unidirectional switch 11;
when the state of the unidirectional switch 11 is the first state, transmitting the message to the protocol conversion module 24; when the state of the unidirectional switch 11 is the second state, the message is transmitted to the second port 22.
In a possible implementation manner, in step S702, transmitting the message to the protocol conversion module 24 or the first port 21 according to the control status information includes:
analyzing the control state information to determine the state of the unidirectional switch 11;
when the state of the unidirectional switch 11 is the first state, transmitting the message to the protocol conversion module 24; when the state of the unidirectional switch 11 is the second state, a message is transmitted to the first port 21.
In a possible implementation manner, in step S702, transmitting the message to the protocol conversion module 24 or the first port 21 according to the control status information includes:
analyzing the control state information to determine the state and state maintaining time of the unidirectional switch 11;
when the state of the unidirectional switch 11 is the first state, transmitting the message to the protocol conversion module 24; when the state of the unidirectional switch 11 is the second state, if the state maintaining time is longer than the second set duration, transmitting the message to the first port 21; and if the state maintaining time is less than or equal to the second set time length, discarding the message.
The control method provided in this embodiment is mainly used for controlling the signal processing device 2, and when detecting that the first port 21 inputs a message, the control method obtains the control state information of the communication control device 1, and transmits the message to the protocol conversion module 24 or the second port 22 according to the control state information. Wherein the control state information includes: the state of the unidirectional switch 11; alternatively, the state and state maintaining time of the unidirectional changeover switch 11; the protocol conversion module 24 transmits the converted message to the second port 22. When detecting that the second port 22 inputs a message, control state information of the communication control device 1 is acquired, and the message is transmitted to the protocol conversion module 24 or the first port 21 according to the control state information. The protocol conversion module 24 transmits the converted message to the first port 21. The channel selection module 23 sequentially transmits the messages according to the control state information of the communication control device 1, so that the communication between the photovoltaic management system and the internal and external networks is not affected.
The control in the signal transmission process is mainly described above from each end of the communication control device 1 and the signal processing device 2. In a specific application scenario, the method mainly relates to the sending of information to the photovoltaic inverter 3 by the intranet main station system, the sending of information to the photovoltaic inverter 3 by the extranet control terminal 5 in the extranet distributed photovoltaic operation and maintenance monitoring system, and the uploading of data to the intranet main station system by the photovoltaic inverter 3. The following describes the information transmission flow in each application scenario.
Under the condition that the intranet master station system sends information to the photovoltaic inverter 3, the information transmission flow is as follows:
the intranet master station system sends a message a to the platform area control terminal 4, the platform area control terminal 4 forwards the message a to the communication control device 1, and if the A end and the C end of the communication control device 1 are connected, namely in communication with the extranet distributed photovoltaic operation and maintenance monitoring system, the communication of the channel is interrupted, and the communication is retransmitted by the intranet master station system after waiting for the restoration of the communication. If the a-side and the B-side of the communication control device 1 are connected, the message a is transmitted to the signal processing device 2. After the signal processing device 2 receives the message a, the channel selection module 23 firstly receives the message a, judges that the switch position of the communication control device 1 is that the end A is communicated with the end B, the channel selection module sends the message a to the message conversion module, the message a is processed by the message conversion module to form a message B, the message B is sent to the second port 22 of the signal processing device 2, and the second port 22 sends the message B to the photovoltaic inverter 3 through the intranet communication interface 31.
Under the condition that an external network control terminal 5 in the external network distributed photovoltaic operation and maintenance monitoring system sends information to a photovoltaic inverter 3, the information transmission flow is as follows:
the external network distributed photovoltaic operation and maintenance monitoring system sends a message C to the mobile communication module 32, the mobile communication module 32 sends the message C to the C end of the communication control device 1, the C end senses an electric pulse signal, the diode is conducted, the switch controller 12 immediately controls the unidirectional change-over switch 11 to switch, the A end is connected with the C end, the B end is disconnected with the A end, and the message C is transmitted to the first port 21. The signal processing device 2 receives the message C from the internal channel selection module 23, determines that the position of the unidirectional switch 11 in the communication control device 1 is that the end a and the end C are communicated, the channel selection module 23 sends the message to the file transparent transmission module 25, and the message C is sent to the second port 22 of the signal processing device 2 after being processed by the file transparent transmission module 25 (or the channel selection module 23 directly sends the message to the second port 22). The second port 22 transmits the message c to the photovoltaic inverter 3 via the intranet communication interface 31. After the C end has no electric pulse signal, the unidirectional change-over switch 11 is controlled to switch by the time delay T, the A end and the C end are disconnected, and the B end and the A end are connected.
Under the scene that the photovoltaic inverter 3 uploads data to the intranet host station system, the information transmission flow is as follows:
The photovoltaic inverter 3 outputs the message d to the second port 22 of the signal processing apparatus 2 via the intranet communication interface 31 of the photovoltaic inverter 3. After the channel selection module 23 of the signal processing device 2 receives the message d, judging the unidirectional switching position in the communication control device 1 at the moment, and if the end A is communicated with the end C, judging the communication duration of the end A and the end C.
If the communication time between the end a and the end C is longer than T1, the channel selection module 23 sends the message d to the file transparent module 25, and the message d is sent to the first port 21 of the signal processing device 2 after being processed by the file transparent module 25 (or the channel selection module 23 directly sends the message to the first port 21). And thus transmitted from the C-terminal to the mobile communication module 32, and transmitted to the external network system via the mobile communication module 32.
If the communication duration of the A end and the C end is less than or equal to T1, discarding the message and not transmitting.
If the end A and the end B are communicated, the channel selection module sends the message d to the message conversion module, the message is processed by the message conversion module to form a message 5, the message 5 is sent to the first interface of the signal processing device 2, and the message 5 is sent to the end B, so that the message is sent to the platform area control terminal 4 and is transmitted to the intranet system through the platform area control terminal 4.
It should be understood that the sequence number of each step in the foregoing embodiment does not mean that the execution sequence of each process should be determined by the function and the internal logic, and should not limit the implementation process of the embodiment of the present invention.
In the foregoing embodiments, the descriptions of the embodiments are emphasized, and in part, not described or illustrated in any particular embodiment, reference is made to the related descriptions of other embodiments.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
In the embodiments provided in the present invention, it should be understood that the disclosed apparatus/terminal and method may be implemented in other manners. For example, the apparatus/terminal embodiments described above are merely illustrative, e.g., the division of the modules or units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection via interfaces, devices or units, which may be in electrical, mechanical or other forms.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in the embodiments of the present invention may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.
The integrated modules/units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on such understanding, the present invention may implement all or part of the flow of the method of the above embodiment, or may be implemented by a computer program to instruct related hardware, where the computer program may be stored in a computer readable storage medium, and the computer program may implement the steps of each of the control method embodiments for a photovoltaic management system when executed by a processor. Wherein the computer program comprises computer program code which may be in source code form, object code form, executable file or some intermediate form etc. The computer readable medium may include: any entity or device capable of carrying the computer program code, a recording medium, a U disk, a removable hard disk, a magnetic disk, an optical disk, a computer Memory, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), an electrical carrier signal, a telecommunications signal, a software distribution medium, and so forth. It should be noted that the computer readable medium may include content that is subject to appropriate increases and decreases as required by jurisdictions in which such content is subject to legislation and patent practice, such as in certain jurisdictions in which such content is not included as electrical carrier signals and telecommunication signals.
The above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention, and are intended to be included in the scope of the present invention.

Claims (6)

1. A photovoltaic management system, comprising: the system comprises a photovoltaic inverter, a station control terminal, an external network control terminal, a communication control device, a signal processing device and a mobile communication module;
wherein the signal processing device comprises: the device comprises a first port, a second port, a channel selection module and a protocol conversion module; the first port is configured to be connected with the communication control device and configured to transmit control state information of the communication control device and messages from different terminals; the channel selection module is respectively connected with the first port, the second port and the protocol conversion module; the channel selection module is configured to transmit the message transmitted by the first port to the protocol conversion module or the second port according to the control state information, and transmit the information transmitted by the second port to the protocol conversion module or the first port according to the control state information;
The communication control device is used for communication control of the photovoltaic inverter, and comprises: a unidirectional change-over switch and a switch controller; the photovoltaic inverter includes: an intranet communication interface;
the unidirectional changeover switch includes: an A end configured to be connected with the intranet communication interface, a B end configured to be connected with an intranet management system terminal, and a C end configured to be connected with the mobile communication module; the state of the unidirectional change-over switch comprises: the terminal A is connected with the terminal B in a first state, and the terminal A is connected with the terminal C in a second state;
the communication control device further includes: the unidirectional conduction module is configured to control unidirectional conduction from the C end to the switch controller;
the switch controller is connected with the end A and is configured to control the unidirectional switch to switch between the first state and the second state; wherein the control state information includes: the state of the unidirectional change-over switch; or, the state and state maintaining time of the unidirectional change-over switch;
wherein the switch controller is configured to control the unidirectional switching switch to switch between the first state and the second state, comprising:
When the input of the pulse signal at the C end is detected, the unidirectional change-over switch is controlled to be converted from the first state to the second state, and a message is forwarded to the signal processing device; the mobile communication module receives a message sent by the external network control terminal;
after the pulse signal at the C end disappears, the unidirectional change-over switch is controlled to recover from the second state to the first state;
the A end of the communication control device is connected with the first port of the signal processing device; the end B is connected with the platform area control terminal; the C end is connected with the mobile communication module; the communication control device is configured to send control state information to the first port;
the second port of the signal processing device is connected with an intranet communication interface of the photovoltaic inverter;
the photovoltaic inverter is configured to be communicatively connected to an external network control terminal through the mobile communication module.
2. The photovoltaic management system of claim 1, wherein the signal processing module of the signal processing device further comprises: the file transparent transmission module is respectively connected with the channel selection module, the first port and the second port;
The channel selection module is configured to transmit the message transmitted by the first port to the protocol conversion module or the file transparent transmission module according to the control state information, and transmit the information transmitted by the second port to the protocol conversion module or the file transparent transmission module according to the control state information.
3. A control method for the photovoltaic management system according to claim 1 or 2, characterized by comprising, before said controlling said unidirectional changeover switch to return from said second state to said first state:
and controlling the one-way change-over switch to maintain the second state and continuously setting the first time duration.
4. A control method for the photovoltaic management system according to claim 1 or 2, for the signal processing apparatus, characterized by comprising:
when the first port inputs a message, control state information of the communication control device is acquired, and the message is transmitted to the protocol conversion module or the second port according to the control state information; wherein the control state information includes: the state of the unidirectional change-over switch; or, the state and state maintaining time of the unidirectional change-over switch; the protocol conversion module transmits the converted message to the second port;
When the second port inputs a message, control state information of the communication control device is acquired, and the message is transmitted to the protocol conversion module or the first port according to the control state information; the protocol conversion module transmits the converted message to the first port.
5. The control method according to claim 4, wherein the transmitting the message to the protocol conversion module or the second port according to the control state information includes:
analyzing the control state information to determine the state of the unidirectional change-over switch;
transmitting a message to the protocol conversion module when the state of the unidirectional switch is a first state; and when the state of the unidirectional switch is the second state, transmitting the message to the second port.
6. The control method according to claim 4, wherein the transmitting the message to the protocol conversion module or the first port according to the control state information includes:
analyzing the control state information to determine the state of the unidirectional change-over switch;
transmitting a message to the protocol conversion module when the state of the unidirectional switch is a first state; transmitting a message to the first port when the state of the unidirectional switch is a second state; or,
Analyzing the control state information to determine the state and state maintaining time of the unidirectional change-over switch;
transmitting a message to the protocol conversion module when the state of the unidirectional switch is a first state; when the state of the unidirectional change-over switch is the second state, if the state maintaining time is longer than a second set duration, transmitting a message to the first port; and if the state maintaining time is less than or equal to the second set duration, discarding the message.
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