CN115833055A - Data display system of distribution network differential protection based on 5G - Google Patents
Data display system of distribution network differential protection based on 5G Download PDFInfo
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- CN115833055A CN115833055A CN202211349668.8A CN202211349668A CN115833055A CN 115833055 A CN115833055 A CN 115833055A CN 202211349668 A CN202211349668 A CN 202211349668A CN 115833055 A CN115833055 A CN 115833055A
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Abstract
The invention relates to a data display system based on 5G power distribution network differential protection, wherein a voltage transformer and a current transformer are used for measuring the electric quantity of a line of power distribution network equipment (0), a collection module (1) comprises a first processing module (12), a display device (4) comprises a second liquid crystal display screen (41) and a second processing module (42), a plurality of collection modules (1) are respectively connected with a power data network (2) through own 5G wireless communication modules (124), and the power data network (2) is connected with a server (3). The data display system based on the 5G power distribution network differential protection can utilize the characteristics of the 5G communication technology, has an independent display device under the condition of not damaging a power grid line or equipment of the power distribution network, and is used for performing differential protection on the power distribution network.
Description
Technical Field
The invention relates to the technical field of power grid protection based on power communication, in particular to a data display system based on 5G power distribution network differential protection.
Background
The principle of the differential protection of the power distribution network is derived from kirchhoff current law, namely kirchhoff current law: at any node in the circuit, the sum of the currents flowing into the node is equal to the sum of the currents flowing out of the node at any one time. Therefore, the differential protection takes the current difference between the two sides of the protected device, and if the difference exceeds the corresponding threshold, it indicates that a problem may occur inside the device, and protects the selective action or alarm. The current differential protection has the advantages of accurate positioning, high sensitivity, no need of voltage information and the like, and is introduced into a power distribution network. The 5G communication technology has the characteristics of high speed, high capacity, high reliability, low time delay and low energy consumption, and compared with the traditional current differential protection based on an optical fiber channel, the 5G communication technology is more suitable for the application scenes of long distance and high power of a power distribution network. When monitoring an electric distribution network, it is desirable not to destroy the electric power network line and not to consume excessive energy from the user. Non-intrusive electrical load monitoring is a method of identifying all the electrical consumers operating on the monitored circuit from the electrical parameter data of the mains. Under the condition that a power grid line or equipment of a power distribution network is not damaged, voltage and current signals in a bus of power equipment such as a substation in the power distribution network can be measured by adopting a voltage Transformer (TV) and a current Transformer (TA). The existing power data of the power distribution network is displayed only by related workers, and some power data also adopt original methods of printing and pasting display boards, so that the power data cannot be conveniently displayed to other industries and government working departments in need of the society.
Disclosure of Invention
The invention aims to provide a data display system based on 5G power distribution network differential protection, which can utilize the characteristics of high speed, high capacity, high reliability, low delay and low energy consumption of a 5G communication technology, adopts a voltage Transformer (TV) and a current Transformer (TA) to measure voltage and current signals in a bus of power equipment such as a transformer station and the like in a power distribution network under the condition of not damaging a power network line or equipment of the power distribution network, is provided with an independent display device, can transmit the obtained power distribution network data to the display device through a 5G mobile communication network, displays the data for a specific user, and can inquire more information by adopting a mobile terminal for carrying out differential protection on the power distribution network.
The invention adopts the technical scheme that the data display system based on the 5G power distribution network differential protection is characterized by comprising a plurality of voltage transformers, current transformers, acquisition modules, a power data network, a server, a display device, a mobile terminal and a differential protection device,
the voltage transformer and the current transformer are used for measuring the electrical quantity of the power distribution network equipment line,
the acquisition module comprises a first processing module, the acquisition module is connected with a voltage transformer and a current transformer, the first processing module comprises an analog-to-digital conversion module, a first controller, a GPS/Beidou time service module and a 5G wireless communication module, the voltage transformer and the current transformer transmit acquired data to the analog-to-digital conversion module, the GPS/Beidou time service module and the wireless communication module are respectively connected with the controller,
the display device comprises a second liquid crystal display screen and a second processing module, the second processing module comprises a second controller, a second memory and a second display device communication module, the second memory, the second display device communication module and the second liquid crystal display screen are respectively connected with the second controller, the second line communication module is connected with a server,
the plurality of acquisition modules are respectively connected with the power data network through the 5G wireless communication modules of the acquisition modules, the power data network is connected with the server, and the server is respectively connected with the display device, the mobile terminal and the differential protection device.
Furthermore, the differential protection device comprises a logic judgment module and an execution module, wherein the logic judgment module judges whether the protected line has a fault according to the obtained electrical quantity, and the execution module operates the relay of the power distribution network equipment according to a judgment result obtained by the logic judgment module.
Furthermore, the electric quantities at two ends of the power distribution network equipment are measured through a voltage transformer and a current transformer, data synchronization is carried out before data acquisition, and the data synchronization is adopted as a GPS/Beidou time service module of the acquisition module for synchronization.
Furthermore, the display device is provided with a two-dimensional code for determining the identity of the display device and the path of the connection server, and the mobile terminal can confirm the identity of the display device and the connection server by scanning the two-dimensional code.
Furthermore, the acquisition module further comprises a first power supply for supplying power to the processing module, the first power supply comprises a first power supply management module 131 and a first AC/DC converter and a first lithium battery which are respectively connected with the first power supply management module, the first AC/DC converter is provided with a port for connecting 220V external alternating current, the display device further comprises a second power supply for supplying power to the display device, the second power supply comprises a second power supply management module and a second AC/DC converter and a second lithium battery which are respectively connected with the second power supply management module, and the AC/DC converter is provided with a port for connecting 220V external alternating current.
Furthermore, the acquisition module further comprises a liquid crystal display screen I.
The invention has the beneficial effects that: 1) The data display system based on the 5G power distribution network differential protection adopts the 5G communication technology to transmit data, does not need a wired network, eliminates the time delay of an optical fiber line caused by long-distance transmission, and has simple structure and low cost; 2) The adopted 5G communication technology has the characteristics of high transmission rate and low time delay, so that the real-time performance of the collected fault monitoring information of the electrical equipment is stronger, the protection switch can be controlled timely and efficiently, and the protection efficiency of the power distribution network is improved; 3) 5G longitudinal current differential protection is adopted for the power distribution network line section, the absolute selectivity of the longitudinal differential protection is utilized, so that the protection within the protection range can accurately act, the protection outside the protection range can not act, and the selectivity and the power supply reliability are realized on the premise of ensuring the speed; 4) The integrated acquisition module is adopted, so that voltage and current signals in a bus of power distribution network power equipment can be measured in different places, convenience and accuracy are realized, centralized maintenance is easy, and the cost is low; 5) After the GPS/Beidou time service signal is combined with the acquired measurement data, the combined GPS/Beidou time service signal can be uploaded to a monitoring department and related users through a mobile communication network, the condition of the measured equipment can be mastered in real time, and historical data can be stored and checked; 6) The display device is provided, the obtained power distribution network data can be transmitted to the display device through the 5G mobile communication network, and the display screen is adopted for displaying, so that required industries and government working departments can be reasonably utilized.
Drawings
FIG. 1 is a schematic structural diagram of a data presentation system for differential protection of a 5G-based power distribution network according to the present invention;
FIG. 2 is a schematic structural diagram of an acquisition module of the data display system for 5G-based differential protection of the power distribution network according to the present invention;
FIG. 3 is a schematic structural diagram of a display device of the data display system based on the 5G power distribution network differential protection of the invention;
wherein, the power distribution network equipment 0, a voltage transformer TV, a current transformer TA,
the system comprises an acquisition module 1, a processing module I12, an analog-to-digital conversion module 121, a controller I122, a GPS/Beidou time service module 123,5G wireless communication module 124, a power supply I13, a power supply I management module 131, an AC/DC (alternating current/direct current) converter I132, a lithium battery I133, a liquid crystal display screen I14,
the power data network 2, the server 3,
the display device 4, the second liquid crystal display screen 41, the second processing module 42, the second controller 421, the memory 422, the display device communication module 423, the second power supply 43, the second power supply management module 431, the second AC/DC converter 432, the second lithium battery 433,
a mobile terminal 5 and a differential protection device 6.
Detailed Description
The invention is further explained below with reference to the figures and examples of the description.
As shown in fig. 1, the data display system based on 5G power distribution network differential protection of the present invention includes a plurality of voltage transformers, current transformers, an acquisition module 1, a power data network 2, a server 3, a display device 4, a mobile terminal 5, and a differential protection device 6.
The differential protection device 6 includes a logic judgment module and an execution module, the logic judgment module judges whether the protected line has a fault according to the obtained electrical quantity, and the execution module operates the relay of the power distribution network device 0 according to the judgment result obtained by the logic judgment module.
And the voltage transformer and the current transformer are used for measuring the electric quantity of the line of the power distribution network equipment 0.
As shown in fig. 2, the acquisition module 1 includes a processing module one 12, a power supply one 13 for supplying power, and a liquid crystal display screen one 14. The acquisition module 1 is connected with a voltage transformer and a current transformer, the processing module I12 comprises an analog-to-digital conversion module 121, a controller I122, a GPS/Beidou time service module 123 and a 5G wireless communication module 124, and the voltage transformer and the current transformer transmit acquired data to the analog-to-digital conversion module 121. Before being transmitted to the analog-to-digital conversion module 121, a low-pass filter may be used to suppress high-frequency noise and harmonic interference to the analog quantity of the collected voltage and current. The analog-to-digital conversion module 121 converts the acquired analog signal data of voltage and current into digital signals. The analog-to-digital conversion module 121, the GPS/beidou time service module 123 and the wireless communication module 124 are respectively connected with the first controller 122. The GPS/Beidou time service module 123 is used for time service through the GPS and the Beidou and outputting high-precision pulse signals for time synchronization. The electric quantities at two ends of the power distribution network equipment 0 are measured through the voltage transformer and the current transformer, data synchronization is carried out before data acquisition, and the data synchronization is adopted as the GPS/Beidou time service module 123 of the acquisition module 1 for synchronization. The first power supply 13 comprises a first power supply management module 131 and a first AC/DC converter 132 and a first lithium battery 133 which are respectively connected with the first power supply management module 131, wherein the first AC/DC converter 132 is provided with a port for connecting 220V external alternating current. The first liquid crystal display 14 can be used for displaying the data processing states of the acquisition module 1 and the differential protection device 6.
As shown in fig. 3, the display device 4 includes a second liquid crystal display screen 41 and a second processing module 42, the second processing module 42 includes a second controller 421, a second memory 422, a second display device communication module 423 and a second power supply 43, the second memory 422, the second display device communication module 423 and the second liquid crystal display screen 41 are respectively connected with the second controller 421, and the line communication module 423 is connected with the server 3. The second power supply 43 comprises a second power supply management module 431, and an AC/DC converter 432 and a second lithium battery 433 which are respectively connected with the second power supply management module 431, wherein the AC/DC converter 432 is provided with a port for connecting 220V external AC. The display device 4 is provided with a two-dimensional code for determining the identity of the display device 4 and the path of the connection server 3, and the mobile terminal 5 can confirm the identity of the display device 4 and the connection server 3 by scanning the two-dimensional code.
The acquisition modules 1 are respectively connected with the power data network 2 through the 5G wireless communication modules 124, the power data network 2 is connected with the server 3, and the server 3 is respectively connected with the display device 4, the mobile terminal 5 and the differential protection device 6. The voltage transformer, the current transformer and the display device 4 can be movable and can be deployed in different workplaces. The power data network 2 can also form a wireless local area network main node, the server 3 and the mobile terminal 5 are respectively connected with the power data network 2 as sub-nodes, and the wireless local area network is a WIFI wireless network.
The invention discloses a data display system based on 5G power distribution network differential protection, which specifically comprises the following steps:
s1: measuring the electrical quantities at two ends of a line of the power distribution network equipment 0 by adopting the voltage transformer and the current transformer;
s2: transmitting the measured electrical quantity to the power data network 2 through a 5G communication channel by using the acquisition module 1;
s3: the power data network 2 transmits the data to the server 3;
s4: the server 3 stores and distributes the data to the next data processing node, the display device 4 displays the data, the mobile terminal 5 is used for processing the management tasks of the server 3 in parallel and displaying monitoring information, the differential protection device 6 judges whether a protected line fails or not, and the execution module acts on the relay of the power distribution network equipment 0 according to the judgment result obtained by the logic judgment module. Otherwise, no action is taken.
Although the present invention has been described in terms of the preferred embodiment, it is not intended that the invention be limited to the embodiment. Any equivalent changes or modifications made without departing from the spirit and scope of the present invention also belong to the protection scope of the present invention. The scope of the invention should therefore be determined with reference to the appended claims.
Claims (6)
1. A data display system based on 5G power distribution network differential protection is characterized by comprising a plurality of voltage transformers, current transformers, an acquisition module (1), a power data network (2), a server (3), a display device (4), a mobile terminal (5) and a differential protection device (6),
the voltage transformer and the current transformer are used for measuring the electrical quantity of the line of the power distribution network equipment (0),
the acquisition module (1) comprises a processing module I (12), the acquisition module (1) is connected with a voltage transformer and a current transformer, the processing module I (12) comprises an analog-to-digital conversion module (121), a controller I (122), a GPS/Beidou time service module (123) and a 5G wireless communication module (124), the voltage transformer and the current transformer transmit acquired data to the analog-to-digital conversion module (121), the GPS/Beidou time service module (123) and the wireless communication module (124) are respectively connected with the controller I (122),
the display device (4) comprises a second liquid crystal display screen (41) and a second processing module (42), the second processing module (42) comprises a second controller (421), a memory (422) and a communication module (423) of the display device, the memory (422), the communication module (423) of the display device and the second liquid crystal display screen (41) are respectively connected with the second controller (421), the line communication module (423) is connected with the server (3),
the acquisition modules (1) are respectively connected with the power data network (2) through own 5G wireless communication modules (124), the power data network (2) is connected with the server (3), and the server (3) is respectively connected with the display device (4), the mobile terminal (5) and the differential protection device (6).
2. The data presentation system for 5G-based differential protection of a power distribution network according to claim 1, wherein the differential protection device (6) comprises a logic judgment module and an execution module, the logic judgment module judges whether the protected line has a fault according to the obtained electrical quantity, and the execution module operates the relay of the power distribution network equipment (0) according to the judgment result obtained by the logic judgment module.
3. The data presentation system for differential protection of the power distribution network based on 5G as claimed in claim 2, wherein the electrical quantities at two ends of the power distribution network equipment (0) are measured through a voltage transformer and a current transformer, data synchronization is performed before data acquisition, and the data synchronization is used for synchronizing the GPS/Beidou time service module (123) of the acquisition module (1).
4. A 5G-based data presentation system for differential protection of power distribution networks according to claim 3, wherein said presentation device (4) has a two-dimensional code for determining the identity of the presentation device (4) and the path to the server (3), and said mobile terminal (5) is capable of confirming the identity of the presentation device (4) and the connection to the server (3) by scanning the two-dimensional code.
5. The data presentation system for 5G-based differential protection of a power distribution network according to claim 4, wherein the acquisition module (1) further comprises a first power supply (13) for supplying power to the first processing module (12), the first power supply (13) comprises a first AC/DC converter (132) and a first lithium battery (133) respectively connected to the first power supply management module 131 and the first power supply management module (131), the first AC/DC converter (132) has a port for connecting 220V external AC, the presentation device (4) further comprises a second power supply (43) for supplying power to the presentation device (4), the second power supply (43) comprises a second power supply management module (431) and a second AC/DC converter (432) and a second lithium battery (433) respectively connected to the second power supply management module (431), and the AC/DC converter (432) has a port for connecting 220V external AC.
6. The data presentation system for differential protection of a 5G-based power distribution network according to claim 5, wherein the acquisition module (1) further comprises a liquid crystal display screen I (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202211349668.8A CN115833055A (en) | 2022-10-31 | 2022-10-31 | Data display system of distribution network differential protection based on 5G |
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| CN202211349668.8A CN115833055A (en) | 2022-10-31 | 2022-10-31 | Data display system of distribution network differential protection based on 5G |
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| CN115833055A true CN115833055A (en) | 2023-03-21 |
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| CN202211349668.8A Pending CN115833055A (en) | 2022-10-31 | 2022-10-31 | Data display system of distribution network differential protection based on 5G |
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