Oil-immersed transformer communication system

Abstract

The application discloses an oil-immersed transformer communication system and relates to the technical field of power system monitoring, which comprises a transformer substation A, a transformer substation B and an optical fiber network connecting the two, wherein the transformer substation A is internally provided with a core monitoring device, a temperature measuring device and an oil sample analysis device; the core monitoring device, the temperature measuring device and the oil sample analysis device are connected with a main transformer on-line monitoring device through an RS-485 interface; the main transformer on-line monitoring device is connected with a switch through an optical fiber; the switch is sequentially connected with a transformer monitoring server, an automation system server and an optical fiber distribution frame; the switch of the transformer substation A is connected with an edge computing gateway, which is used for data screening and transmission through a 4G network; the optical fiber distribution frame of the transformer substation B is connected with a switch through an optical fiber; and the switch is sequentially connected with a transformer monitoring server, an automation system server and a monitoring machine. The application can realize the automatic acquisition, screening and reliable transmission of transformer data among multiple transformer substations.

Description

Technical Field

[0001] This application relates to the field of power system monitoring technology, and in particular to a communication system for an oil-immersed transformer. Background Technology

[0002] Currently, transformer monitoring in unmanned substations mainly relies on manual inspections and traditional equipment, such as physical pointer thermometers for temperature measurement, manual oil sample collection, and laboratory analysis. This approach suffers from poor real-time performance and low efficiency. Furthermore, existing data transmission systems typically use a single communication channel, lacking redundancy. When fiber optic cables fail, data continuity cannot be guaranteed, and the lack of filtering of massive amounts of monitoring data leads to bandwidth constraints and transmission delays. Although some systems have attempted to use automated monitoring devices, the inconsistent protocols between these devices hinder centralized management and efficient interaction of data from multiple substations. Therefore, there is an urgent need for a transformer communication system that supports multi-protocol conversion, possesses edge computing capabilities, and features dual-channel redundancy. Utility Model Content

[0003] The purpose of this application is to provide an oil-immersed transformer communication system that can realize the automated acquisition, screening and reliable transmission of transformer data between multiple substations.

[0004] To achieve the above objectives, this application provides the following solution:

[0005] In a first aspect, this application provides a communication system for an oil-immersed transformer, including substation A, substation B, and an optical fiber network connecting the two. Substation A is equipped with a core monitoring device, a temperature measuring device, and an oil sample analysis device. The core monitoring device, the temperature measuring device, and the oil sample analysis device are connected to the main transformer online monitoring device via an RS-485 interface.

[0006] The main transformer online monitoring device is connected to a switch via optical fiber, and the switch is connected in sequence to the transformer monitoring server, the automation system server and the optical fiber distribution frame.

[0007] The switch in substation A is connected to an edge computing gateway for data filtering and transmission via a 4G network.

[0008] The fiber optic distribution frame of substation B is connected to a switch via optical fiber. The switch is connected in sequence to the transformer monitoring server, the automation system server, and the monitoring machine.

[0009] Optionally, the core monitoring device, temperature measuring device, and oil sample analysis device communicate with the main transformer online monitoring device using the MODBUS RTU protocol.

[0010] Optionally, the main transformer online monitoring device communicates with the switch using the IEC 104 protocol.

[0011] Optionally, the edge computing gateway is configured to transmit only data with a temperature > 60°C to substation B.

[0012] Optionally, the edge computing gateway is connected to the Internet via a 4G network. When the optical fiber fails, substation B can access the real-time data of the edge computing gateway via the Internet.

[0013] Optionally, the fiber optic distribution frames of substations A and B can be cascaded to connect N substations.

[0014] Optionally, the transformer monitoring server of substation A is connected to the automation system server via a network cable and transmits data using the IEC 104 protocol.

[0015] Optionally, the monitoring machine of substation B accesses the automation system server through the integrated automation system to display the core status, temperature, and oil sample data of multiple substations.

[0016] Optionally, the main transformer online monitoring device supports the connection of monitoring devices for N transformers.

[0017] Optionally, the switches of substations A and B are connected to the fiber optic distribution frame via single-mode fiber.

[0018] According to the specific embodiments provided in this application, the following technical effects are disclosed:

[0019] This application provides a communication system for an oil-immersed transformer, including substation A, substation B, and a fiber optic network connecting them. First, the communication system employs advanced sensor technology, such as core monitoring devices, temperature measuring devices, and oil sample analysis devices. These devices can monitor key transformer parameters in real time and transmit the data to the main transformer online monitoring device via an RS-485 interface, achieving automated data acquisition. Second, the main transformer online monitoring device is connected to a switch via fiber optic cable, constructing a high-efficiency data transmission channel. The switch, as the data exchange center, can quickly transmit the collected transformer data to the transformer monitoring server and the automation system server. Simultaneously, the use of fiber optic distribution frames ensures the stability and reliability of the fiber optic network, providing a guarantee for long-distance data transmission. Third, the switch at substation A is connected to an edge computing gateway, enabling local data filtering and processing. The edge computing gateway can utilize its computing power to perform preliminary filtering and organization of the collected data, thereby reducing unnecessary data transmission and improving data transmission efficiency. The filtered data is transmitted to a remote server or monitoring center via a 4G network, enabling remote access and analysis of the data. Finally, substation B also adopted a similar communication architecture to substation A, ensuring data interconnection and interoperability among multiple substations. Through the fiber optic network, transformer data from substations A and B can be shared and exchanged, providing comprehensive data support for the operation and maintenance of the power system. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a connection diagram of an oil-immersed transformer communication system provided in an embodiment of this application; Detailed Implementation

[0022] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0023] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] In one exemplary embodiment, such as Figure 1 As shown, an oil-immersed transformer communication system includes substation A, substation B, and an optical fiber network connecting the two. Substation A is equipped with a core monitoring device, a temperature measuring device, and an oil sample analysis device. The core monitoring device, the temperature measuring device, and the oil sample analysis device are connected to the main transformer online monitoring device via an RS-485 interface.

[0025] The main transformer online monitoring device is connected to a switch via optical fiber, and the switch is connected in sequence to the transformer monitoring server, the automation system server and the optical fiber distribution frame.

[0026] The switch in substation A is connected to an edge computing gateway for data filtering and transmission via a 4G network.

[0027] The fiber optic distribution frame of substation B is connected to a switch via optical fiber. The switch is connected in sequence to the transformer monitoring server, the automation system server, and the monitoring machine.

[0028] In the transformer area of ​​substation A, core monitoring devices, temperature measuring devices, oil sample analysis devices, and main transformer online monitoring devices have been installed. The switch and transformer detection server are housed in the transformer online monitoring cabinet, while the fiber optic distribution frame and automation system server are located in the integrated automation system cabinet.

[0029] Previously, substation A used physical pointer thermometers for temperature measurement instead of modern temperature measuring devices. Furthermore, core monitoring and oil sample analysis devices were not installed, and oil sample analysis relied entirely on manual sampling and delivery to the laboratory. This application introduces temperature measuring devices, core monitoring devices, and oil sample analysis devices (all three supporting IEC 61850 protocol communication). The data acquisition device (main transformer online monitoring device) is responsible for collecting data from these three devices and transmitting the data via a switch.

[0030] Specifically, in this substation, the core monitoring device, temperature measuring device, and oil sample analysis device are connected to the main transformer online monitoring device via communication lines (RS-485 interface), and transmit data to the main transformer online monitoring device via the MODBUS RTU communication protocol. The main transformer online monitoring device is connected to a switch via fiber optic cable, and transmits data to the switch via the IEC104 protocol. The switch is connected to the transformer monitoring server via a network cable, and transmits data to the transformer monitoring server via the IEC104 protocol. The transformer monitoring server is connected to the automation system server via a network cable, and transmits data to the automation system server via the IEC104 protocol. The switch is connected to a fiber optic distribution frame via fiber optic cable, and transmits data to the fiber optic distribution frame via the IEC104 protocol. The fiber optic distribution frame in substation A is connected to the fiber optic distribution frame in substation B via fiber optic cable, and transmits data to the fiber optic distribution frame in substation B via the IEC104 protocol.

[0031] Inside substation A, a switch connects to an edge computing gateway to process the collected data. For example, data with temperatures above 60 degrees Celsius collected by the temperature measuring device is transmitted to substation B via the edge computing device, while data with temperatures below 60 degrees Celsius is not transmitted. This aims to reduce data transmission latency and bandwidth pressure.

[0032] The edge computing gateway also uploads data to the internet via the 4G network. When the fiber optic channel fails, the edge computing gateway's page can be accessed via a computer connected to the internet within substation B to view real-time data. (This is only a backup data viewing method in case of fiber optic channel failure; the data viewed does not have storage capabilities.)

[0033] Inside substation B, the core monitoring device, temperature measuring device, oil sample analysis device, and main transformer online monitoring device are all installed in the specific area where the transformer is located; the switch and transformer detection server are placed inside the transformer online monitoring cabinet; and the fiber optic distribution frame and automation system server are installed inside the integrated automation system cabinet.

[0034] The core monitoring device, temperature measuring device, and oil sample analysis device are connected to the main transformer online monitoring device via a communication line (RS-485 interface), transmitting collected data to the main transformer online monitoring device using the MODBUS RTU communication protocol. The main transformer online monitoring device is connected to a switch via fiber optic cable, transmitting data to the switch using the IEC104 protocol. The switch is connected to the transformer monitoring server via a network cable, also transmitting data to the transformer monitoring server using the IEC104 protocol. The transformer monitoring server is connected to the automation system server via a network cable, transmitting data to the automation system server using the IEC104 protocol. The fiber optic distribution frame in substation B is connected to a switch via fiber optic cable, transmitting data from substation A to the switch using the IEC104 protocol. The switch is connected to the transformer monitoring server via a network cable, transmitting data from substation A to the transformer monitoring server using the IEC104 protocol. The transformer monitoring server is connected to the automation system server via a network cable, transmitting data from substation A to the automation system server using the IEC104 protocol. Under this configuration, the on-duty personnel in substation B can monitor various data of the main transformers in substations A and B in real time (including data collected by the core monitoring device, temperature measuring device, and oil sample analysis device) through the monitoring machine (the monitoring machine is connected to the integrated automation system and can access the automation system server).

[0035] The two substations mentioned above each have two transformers (i.e., main transformer #1 and main transformer #2). However, in practical applications, this connection method can be extended to multiple transformers (i.e., #1, #2, ..., N), and the number of substations can also be increased accordingly. Therefore, the number of main transformers and the number of substations should not be considered as limitations on the content of this application.

[0036] In summary, this application has the following technical effects:

[0037] 1) Based on the efficient transmission of fiber optic networks and the IEC 104 protocol, data interconnection is established between unmanned substations (such as substation A) and manned substations (such as substation B), enabling manned substations to acquire and centrally monitor the status, temperature, and oil sample analysis data of the main transformer core in unmanned substations in real time, thus solving the problems of low efficiency and poor real-time performance of traditional manual inspections.

[0038] 2) The raw data is dynamically filtered through the edge computing gateway (e.g., high-temperature data is transmitted first). Combined with the dual-channel redundancy design of fiber optic and 4G, the data transmission bandwidth pressure and latency are significantly reduced. At the same time, it is ensured that data can still be transmitted continuously through the backup channel when the fiber optic cable fails, thus improving the system reliability.

[0039] 3) Upload the transformer monitoring data of multiple substations to the integrated automation system in a unified manner, and achieve data compatibility of heterogeneous equipment through standardized protocols (IEC 104, MODBUS RTU), provide on-duty personnel with a panoramic monitoring interface, support the flexible expansion of multiple main transformers (1#, 2#...N#) and multiple substations, and meet the needs of intelligent operation and maintenance of the power grid.

[0040] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0041] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. In summary, the content of this specification should not be construed as a limitation of this application.

Claims

1. A communication system for an oil-immersed transformer, comprising substation A, substation B, and an optical fiber network connecting the two, characterized in that, The substation A is equipped with a core monitoring device, a temperature measuring device, and an oil sample analysis device; the core monitoring device, the temperature measuring device, and the oil sample analysis device are connected to the main transformer online monitoring device via an RS-485 interface; The main transformer online monitoring device is connected to a switch via optical fiber, and the switch is connected in sequence to the transformer monitoring server, the automation system server and the optical fiber distribution frame. The switch in substation A is connected to an edge computing gateway for data filtering and transmission via a 4G network. The fiber optic distribution frame of substation B is connected to a switch via optical fiber. The switch is connected in sequence to the transformer monitoring server, the automation system server, and the monitoring machine.

2. The communication system for an oil-immersed transformer according to claim 1, characterized in that, The core monitoring device, temperature measuring device, and oil sample analysis device communicate with the main transformer online monitoring device using the MODBUS RTU protocol.

3. The communication system for an oil-immersed transformer according to claim 1, characterized in that, The main transformer online monitoring device communicates with the switch using the IEC 104 protocol.

4. The communication system for an oil-immersed transformer according to claim 1, characterized in that, The edge computing gateway is configured to transmit only data with a temperature > 60°C to substation B.

5. The communication system for an oil-immersed transformer according to claim 1, characterized in that, The edge computing gateway is connected to the Internet via a 4G network. When the optical fiber fails, substation B can access the real-time data of the edge computing gateway via the Internet.

6. The communication system for an oil-immersed transformer according to claim 1, characterized in that, The fiber optic distribution frames of substations A and B support cascading to connect N substations.

7. The communication system for an oil-immersed transformer according to claim 1, characterized in that, The transformer monitoring server and automation system server of substation A are connected via network cable and transmit data using the IEC 104 protocol.

8. The communication system for an oil-immersed transformer according to claim 1, characterized in that, The monitoring machine of substation B accesses the automation system server through the integrated automation system to display the core status, temperature, and oil sample data of multiple substations.

9. The communication system for an oil-immersed transformer according to claim 1, characterized in that, The main transformer online monitoring device supports the connection of monitoring devices for N transformers.

10. A communication system for an oil-immersed transformer according to claim 1, characterized in that, The switches and fiber optic distribution frames of substations A and B are connected via single-mode fiber optic cables.

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