DC switchgear based on intelligent operation and maintenance and GOOSE system

Abstract

The utility model discloses a DC switch device based on intelligent operation and maintenance and a GOOSE system, and relates to the technical field of rail transit DC power supply system operation and maintenance. A first GOOSE switch, a second GOOSE switch, an intelligent operation and maintenance switch and an intelligent monitoring unit are arranged in a terminal cabinet; the first GOOSE switch and the second GOOSE switch are respectively in communication connection with a first GOOSE switch and a second GOOSE switch of an adjacent station, and each GOOSE switch is respectively in communication connection with a DC traction protection device in each cabinet. The intelligent operation and maintenance switch is in communication connection with the intelligent monitoring unit, the circuit breaker characteristic monitoring device, the temperature measurement receiving device and the direct current traction protection devices in the cabinets, the problems that the reliability of a shunt tripping signal network is insufficient and the manual operation and maintenance efficiency is poor are solved, and the beneficial effects of enhancing the system reliability and improving the operation and maintenance efficiency are achieved.

Description

Technical Field

[0001] This application relates to the field of operation and maintenance technology of DC power supply system for rail transit, specifically a DC switchgear based on intelligent operation and maintenance and GOOSE system. Background Technology

[0002] With the continuous development of urban rail transit, DC switchgear plays a crucial role in power transmission and distribution, and the requirements for its power supply reliability and rapid fault handling capabilities are becoming increasingly stringent. However, traditional DC switchgear has certain limitations in operation and maintenance management and fault response. On the one hand, traditional operation and maintenance methods rely on manual inspections, which are costly and prone to missed inspections and misjudgments. On the other hand, when a fault occurs, the response speed is slow, and it is impossible to achieve rapid tripping and quickly disconnect the fault point, making it difficult to meet the requirements of modern power systems for high reliability and rapid fault handling. At the same time, with the development of intelligent technology, the demand for intelligent operation and maintenance of DC switchgear is increasing. For example, patent document CN106100130A discloses a protection scheme for a DC power supply system in urban rail transit. All DC protection devices are connected to a communication processing device, and the communication processing devices between different traction substations are cascaded to construct a GOOSE network for transmitting tripping signals between DC protection devices in the entire DC power supply system. The GOOSE network is used to transmit tripping signals between protection devices.

[0003] In actual operation, the above-mentioned patents and existing technologies have the following shortcomings: the reliability of a single GOOSE network is insufficient and the efficiency of manual operation and maintenance is low. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this application provides a DC switching device based on intelligent operation and maintenance and a GOOSE system to solve the problems of insufficient reliability of the interlocking signal network and low efficiency of manual operation and maintenance.

[0005] To achieve the above objectives, this application provides the following technical solution:

[0006] A DC switchgear based on intelligent operation and maintenance and a GOOSE system includes a DC incoming cabinet, a feeder cabinet, a negative terminal cabinet, and a terminal cabinet. A power monitoring switch is installed in the terminal cabinet. DC traction protection devices are installed in the DC incoming cabinet, feeder cabinet, and negative terminal cabinet respectively. The power monitoring switch has external and internal interfaces. The external interface is used for communication with an external power monitoring system, and the internal interface is used for communication with the DC traction protection devices in the DC incoming cabinet, feeder cabinet, and negative terminal cabinet respectively. The terminal cabinet also contains a first GOOSE switch, a second GOOSE switch, and an intelligent operation and maintenance switch. The first GOOSE switch is connected to the DC traction protection devices in the DC incoming cabinet, feeder cabinet, and negative terminal cabinet respectively. The second GOOSE switch... The GOOSE switch is also connected to the DC traction protection devices in the DC incoming cabinet, feeder cabinet, and negative terminal cabinet. The first GOOSE switch is connected to the first GOOSE switch of the DC switchgear in the left neighboring station and the first GOOSE switch of the DC switchgear in the right neighboring station. The second GOOSE switch is connected to the second GOOSE switch of the DC switchgear in the left neighboring station and the second GOOSE switch of the DC switchgear in the right neighboring station. Each DC traction protection device is equipped with a trip control unit. The intelligent operation and maintenance switch is connected to the DC traction protection devices in the DC incoming cabinet, feeder cabinet, and negative terminal cabinet. The intelligent operation and maintenance switch is equipped with an external interface for communication with an external intelligent operation and maintenance backend.

[0007] Preferably, the communication connection between the external interface of the power monitoring switch and the external power monitoring system is via Modbus TCP security protocol and / or IEC 60870-5-104 protocol, IEC 61850 protocol and uses optical fiber physical connection.

[0008] Preferably, the communication connection between the first GOOSE switch and the second GOOSE switch and the first GOOSE switch of the left neighboring station DC switchgear and the right neighboring station DC switchgear is via the GOOSE protocol and uses a physical fiber optic connection.

[0009] Preferably, the communication connection between the first GOOSE switch and the second GOOSE switch and the DC traction protection device in the DC incoming cabinet, feeder cabinet, and negative electrode cabinet is respectively through the first group of GOOSE communication protocols and the second group of GOOSE communication protocols and is physically connected by Ethernet cable.

[0010] Preferably, the communication connection between the external interface of the intelligent operation and maintenance switch and the external intelligent operation and maintenance backend is via Modbus TCP security protocol and / or IEC 60870-5-104 protocol, IEC 61850 protocol and uses optical fiber physical connection.

[0011] Preferably, the terminal cabinet panel is equipped with an intelligent monitoring unit, which is equipped with a display device and an interactive device and is communicatively connected to the intelligent operation and maintenance switch.

[0012] Preferably, it includes a circuit breaker characteristic monitoring device installed on the circuit breaker inside the cabinet, and the circuit breaker characteristic monitoring device is communicatively connected to the intelligent operation and maintenance switch.

[0013] Preferably, it includes a circuit breaker contact temperature measuring device installed on the circuit breaker inside the cabinet, and the circuit breaker contact temperature measuring device is connected to the intelligent operation and maintenance switch through a wireless temperature measuring receiver installed inside the cabinet.

[0014] Preferably, it includes a busbar temperature measuring device installed on the busbar inside the cabinet, and the busbar temperature measuring device is connected to the intelligent operation and maintenance switch through a wireless temperature measuring receiver installed inside the cabinet.

[0015] Preferably, the communication connection between the intelligent operation and maintenance switch and the DC traction protection device, intelligent monitoring unit, circuit breaker characteristic monitoring device, and wireless temperature measurement receiver in the DC incoming cabinet, feeder cabinet, and negative electrode cabinet is through the Modbus TCP security protocol and / or IEC 60870-5-104 protocol and IEC 61850 protocol, and is physically connected via Ethernet cable.

[0016] This application achieves automated monitoring and fault diagnosis of DC switchgear by installing an intelligent operation and maintenance switch within the equipment to connect to an intelligent operation and maintenance backend. It accurately diagnoses the type, location, and severity of equipment faults, improving maintenance efficiency and accuracy while reducing the workload of manual inspections. Simultaneously, by setting up a visualized intelligent monitoring unit, maintenance personnel can intuitively understand the equipment's operating status and fault conditions, facilitating the development of reasonable operation and maintenance plans. Leveraging the high-speed communication capabilities of the GOOSE system, fault information can be rapidly transmitted to relevant equipment and the control center after a fault occurs, enabling rapid fault isolation and power restoration. The use of dual-network redundancy, with mutual backup, enhances system reliability. The technical solution formed by comprehensively utilizing the above-mentioned technical features improves the safety and stability of the entire power supply system and increases operation and maintenance efficiency. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the cabinet arrangement according to an embodiment of this application;

[0018] Figure 2 This is a schematic diagram of a network architecture according to an embodiment of this application;

[0019] Among them, 1-DC switchgear of this station, 11-terminal cabinet, 111-power monitoring switch, 112-first GOOSE switch, 113-second GOOSE switch, 114-intelligent monitoring unit, 115-intelligent operation and maintenance switch, 12-feeder cabinet, 121-DC traction protection device for feeder cabinet, 13-DC incoming cabinet, 131-DC traction protection device for incoming cabinet, 14-negative pole cabinet, 141-DC traction protection device for negative pole cabinet, 151-optical fiber, 152-Ethernet cable, 161-circuit breaker characteristic monitoring device, 162-circuit breaker contact temperature measuring device, 163-busbar temperature measuring device, 164-wireless temperature measuring receiver, 2-DC switchgear of the left neighboring station, 3-DC switchgear of the right neighboring station, 4-power monitoring system, 5-intelligent operation and maintenance backend. Detailed Implementation

[0020] The technical solutions in 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.

[0021] This embodiment provides a technical solution: An embodiment of a DC switchgear based on intelligent operation and maintenance and a GOOSE system, comprising two DC incoming cabinets 13, four feeder cabinets 12, one negative terminal cabinet 14, and one terminal cabinet 11. The terminal cabinet 11 houses a power monitoring switch 111, a first GOOSE switch 112, a second GOOSE switch 113, an intelligent monitoring unit 114, and an intelligent operation and maintenance switch 115. The DC incoming cabinets 13, feeder cabinets 12, and negative terminal cabinet 14 are respectively equipped with DC traction protection devices, namely, the DC traction protection device 131 for the incoming cabinet of DC incoming cabinet 13, the DC traction protection device for the feeder cabinet of feeder cabinet 12, and the DC traction protection device 141 for the negative terminal cabinet of negative terminal cabinet 14. These DC traction protection devices are microprocessor-based measurement and control protection devices, such as the SEPCOS series products from Saixuelong, supporting IEC-based... The power monitoring switch 111 is equipped with external and internal interfaces for communication via the 61850 protocol's GOOSE and MMS. The external interface communicates with the external power monitoring system 4 (PSCADA), while the internal interface communicates with the DC traction protection devices in the DC incoming cabinet 13, feeder cabinet 12, and negative terminal cabinet 14, forming the basic communication network for the substation's standard DC cabinets. The communication between the external interface of the power monitoring switch 111 and the external power monitoring system 4 is achieved through the Modbus TCP security protocol and / or the IEC 60870-5-104 protocol and the IEC 61850 protocol, using a fiber optic physical connection. Besides the aforementioned protocols, other similar protocols converted from or specified by industry or national standards, such as those in DL / T 860, DL / T 634.5104, or GB / T 42151, can also be used.

[0022] The first GOOSE switch 112 is communicatively connected to the DC traction protection devices in the DC incoming cabinet 13, feeder cabinet 12, and negative terminal cabinet 14, respectively. The second GOOSE switch 113 is also communicatively connected to the DC traction protection devices in the same cabinet. The first GOOSE switch 112 is communicatively connected to the first GOOSE switch of the DC switchgear 2 at the left neighboring station and the first GOOSE switch of the DC switchgear 3 at the right neighboring station, respectively. The second GOOSE switch 113 is communicatively connected to the second GOOSE switch of the DC switchgear 2 at the left neighboring station and the second GOOSE switch of the DC switchgear 3 at the right neighboring station, respectively. Each DC traction protection device is equipped with a GOOSE communication unit and a trip control unit. The trip control unit is connected to the switch outside the DC traction protection device to control the switch tripping. This part constitutes a GOOSE tripping network. The GOOSE communication unit of the DC traction protection device is used to receive and send GOOSE messages, enabling fast communication between the switchgear. The inter-trip control unit controls the DC switching equipment to perform inter-trip operations based on the content of the GOOSE message. When a fault occurs, it can quickly send fault information to the relevant control center and protection devices, achieving rapid fault isolation and power restoration. It also enables inter-station GOOSE inter-trip and interlocking functions through the GOOSE network. After the communication network is completed, if the DC traction protection device at this station detects a power protection action, it will send an inter-trip signal to the GOOSE communication network. The corresponding DC traction protection device in the neighboring station will execute the corresponding command according to the subscribed information and predetermined logic. The relevant GOOSE inter-trip logic will be judged and processed in real time by the internal logic of the protection device. This network can also achieve inter-branch tripping between adjacent substations: First, the DC traction protection device 121 in one feeder cabinet 12 of a substation sends a tripping signal to the GOOSE network. Then, the GOOSE switch in the terminal cabinet 11 broadcasts and forwards the signal to the network. After receiving the signal, the DC traction protection devices 121 in the feeder cabinets 12 of adjacent substations supplying power in the same section perform message parsing and logic processing, and finally issue a tripping command to the circuit breaker, causing it to trip. This network can also achieve inter-substation tripping when power supply is in a cross-zone manner: When the intermediate substation is out of operation, the power supply system switches to large bilateral power supply. When the cross-zone disconnect switch of the intermediate substation is closed, its closing signal will be simultaneously uploaded to the corresponding DC traction protection devices 121 in the two feeder cabinets. The DC traction protection devices 121 transmit the signal as a digital communication message, and both the left and right adjacent substations will receive the status signal of the cross-zone disconnect switch. The left neighbor station sends a digital trip output signal. After receiving the trip signal, the corresponding protection device of the right neighbor station performs message parsing and logic processing, and finally sends a trip command to the circuit breaker to enable the trip circuit breaker to operate.In this embodiment, the communication connection between the first GOOSE switch 112 and the second GOOSE switch 113 and the first GOOSE switches of the DC switchgear at the left and right adjacent stations is via the GOOSE protocol and physically connected using optical fiber 151. The laying of optical fiber 151 is completed by the construction party. Besides optical fiber 151, other suitable communication connection methods can also be used. In addition to the above-mentioned protocols, other similar protocols converted or specified by industry standards or national standards, such as those in DL / T 860, DL / T 634.5104, or GB / T 42151, can also be used. The communication connection between the first GOOSE switch 112 and the second GOOSE switch 113 and the DC traction protection devices in the DC incoming cabinet 13, feeder cabinet 12, and negative electrode cabinet 14 is via the first and second GOOSE communication protocols respectively and physically connected using Ethernet cable 152. The Ethernet cable 152 mentioned in this application is a polyolefin insulated horizontal twisted-pair cable for digital communication.

[0023] The embodiments of this application also include a network for intelligent operation and maintenance. The intelligent operation and maintenance switch 115 is communicatively connected to the DC traction protection devices in the DC incoming cabinet 13, feeder cabinet 12, and negative electrode cabinet 14, respectively. The intelligent operation and maintenance switch 115 is equipped with an external interface for communication with the external intelligent operation and maintenance backend 5. In this embodiment, the communication connection between the external interface of the intelligent operation and maintenance switch 115 and the external intelligent operation and maintenance backend 5 is also achieved through the Modbus TCP security protocol and / or the IEC60870-5-104 protocol and the IEC 61850 protocol, and is physically connected using fiber optic cable 151. When a power supply system fault occurs, the DC traction protection devices in all DC cabinets are activated, causing the switching equipment of the faulty line to trip. At the same time, the DC traction protection devices automatically record the fault waveform and upload it to the intelligent operation and maintenance backend 5. The intelligent operation and maintenance backend 5 uses the waveform data at the time of the fault to perform comprehensive analysis and provide relevant fault maintenance suggestions. For example, the DC traction protection device 141 inside the negative switchgear 14 can collect the leakage current and voltage of the frame in real time and upload them to the intelligent operation and maintenance backend 5 to monitor the changing trend of frame insulation problems in real time. The intelligent operation and maintenance backend 5 can obtain timely data from the equipment, establish a circuit breaker health monitoring model based on data analysis, perform analysis and diagnosis, provide rapid early warning, and predict the life of the circuit breaker, thereby realizing online real-time monitoring of the switchgear.

[0024] In this embodiment, the DC switchgear 1 based on intelligent operation and maintenance and GOOSE system also includes a circuit breaker characteristic monitoring device 161 installed on each circuit breaker in the cabinet. The circuit breaker characteristic monitoring device 161 includes matching sensors and is connected to the intelligent operation and maintenance switch 115. The circuit breaker characteristic monitoring device 161 can collect the circuit breaker's opening coil current, closing coil current, operating voltage, etc. in real time through its matching sensors. When the opening and closing inputs are triggered, waveform recording is performed to analyze the health status of the circuit breaker and to make alarm judgments on the coil parameters according to the set values.

[0025] In this embodiment, the DC switchgear 1 based on the intelligent operation and maintenance and GOOSE system further includes a circuit breaker contact temperature measuring device 162 installed on the circuit breaker inside the cabinet and a busbar temperature measuring device 163 installed on the busbar. The circuit breaker contact temperature measuring device 162 is installed on the upper and lower contacts of the circuit breaker. The circuit breaker contact temperature measuring device 162 and the busbar temperature measuring device 163 are connected to the intelligent operation and maintenance switch 115 through a wireless temperature measuring receiver 164 installed inside the cabinet to receive wireless temperature measurement data in real time. The monitoring data can be sent to the wireless temperature measuring receiver 164 in real time using wireless data transmission technology, and then the temperature data is transmitted to the intelligent operation and maintenance backend 5 through the wireless temperature measuring receiver 164. The intelligent operation and maintenance backend 5 can make alarm judgments based on the set thresholds. One wireless temperature measuring receiver 164 can receive data from up to hundreds of sensors. As an extension, a humidity sensor can also be installed inside the cabinet.

[0026] The terminal cabinet 11 panel is equipped with an intelligent monitoring unit 114. The intelligent monitoring unit 114 includes a display device and an interactive device, and is communicatively connected to the intelligent operation and maintenance switch 115. In this embodiment, the display device and interactive device utilize the built-in display and touchscreen of a 15.6-inch widescreen industrial tablet PC. Maintenance personnel can use this visual management interface to understand the real-time operating status of the equipment, view fault diagnosis reports, perform remote control operations, and formulate reasonable operation and maintenance plans. With the entire network, visual management can also be achieved via PC or mobile phone. Based on big data analysis and artificial intelligence algorithms, the uploaded data is deeply analyzed to construct the degradation trend of key power supply equipment such as DC circuit breakers throughout their entire lifecycle, and to assess the lifespan status of key equipment such as DC circuit breakers. It can accurately diagnose the fault type, location, and severity of the equipment, providing maintenance personnel with detailed fault diagnosis reports to facilitate targeted maintenance measures.

[0027] In this embodiment, the communication connection between the intelligent operation and maintenance switch 115 and the DC traction protection devices and intelligent monitoring units 114, circuit breaker characteristic monitoring devices 161, and wireless temperature measurement receivers 164 in the DC incoming cabinet 13, feeder cabinet 12, and negative electrode cabinet 14 is achieved through the Modbus TCP security protocol and / or the IEC 60870-5-104 protocol and IEC 61850 protocol, and is physically connected via Ethernet cable 152. After networking all intelligent operation and maintenance devices, the intelligent monitoring unit 114 collects, analyzes, and stores data. Based on the circuit breaker's operating data, including the number of opening and closing cycles, the number of tripping cycles, the magnitude of the short-circuit breaking current, and the load rate operating time, and combined with the circuit breaker's operating characteristics, the aging degree of the circuit breaker is evaluated through a mathematical model, establishing a full life cycle model of the circuit breaker, which can be visualized and conveniently accessed by operation and maintenance personnel. The circuit breaker aging data, fault recording data, and temperature and humidity data are uploaded to the power supply system intelligent operation and maintenance backend 5.

[0028] In the description of this application, it should be noted that the power monitoring switch 111, intelligent monitoring unit 114, intelligent operation and maintenance switch 115, and intelligent operation and maintenance backend 5 all adopt existing technologies. For example, the power monitoring switch 111 and the intelligent operation and maintenance switch 115 both use ordinary switches, but perform different functions. The intelligent monitoring unit 114 can use a common industrial control computer, and the intelligent operation and maintenance backend 5 can use the ZDS DC switchgear intelligent operation and maintenance management platform of Saixuelong Company. In this application, the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0029] The above description is merely a preferred embodiment of this application, but the scope of protection of this application is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this application, based on the technical solution and inventive concept of this application, should be included within the scope of protection of this application.

Claims

1. A DC switchgear based on intelligent operation and maintenance and GOOSE system, comprising a DC incoming cabinet (13), a feeder cabinet (12), a negative terminal cabinet (14), and a terminal cabinet (11), wherein a power monitoring switch (111) is provided in the terminal cabinet (11), and DC traction protection devices are respectively provided in the DC incoming cabinet (13), the feeder cabinet (12), and the negative terminal cabinet (14), and the power monitoring switch (111) is provided with an external interface and an internal interface, wherein the external interface is used for communication connection with an external power monitoring system (4), and the internal interface is respectively connected to the DC traction protection devices in the DC incoming cabinet (13), the feeder cabinet (12), and the negative terminal cabinet (14), characterized in that: The terminal cabinet (11) is also equipped with a first GOOSE switch (112), a second GOOSE switch (113), and an intelligent operation and maintenance switch (115). The first GOOSE switch (112) is connected to the DC traction protection devices in the DC incoming cabinet (13), the feeder cabinet (12), and the negative pole cabinet (14), respectively. The second GOOSE switch (113) is also connected to the DC traction protection devices in the DC incoming cabinet (13), the feeder cabinet (12), and the negative pole cabinet (14), respectively. The first GOOSE switch (112) is connected to the first GOOSE switch of the DC switchgear (2) of the adjacent station. The machine and the first GOOSE switch of the right neighboring station DC switchgear (3) are connected in communication. The second GOOSE switch (113) is connected in communication with the second GOOSE switch of the left neighboring station DC switchgear (2) and the second GOOSE switch of the right neighboring station DC switchgear (3). Each DC traction protection device is equipped with a trip control unit. The intelligent operation and maintenance switch (115) is connected in communication with the DC traction protection devices in the DC incoming cabinet (13), feeder cabinet (12), and negative pole cabinet (14). The intelligent operation and maintenance switch (115) is equipped with an external interface for communication with the external intelligent operation and maintenance backend (5).

2. The DC switchgear based on intelligent operation and maintenance and GOOSE system according to claim 1, characterized in that: The communication connection between the external interface of the power monitoring switch (111) and the external power monitoring system (4) is through the Modbus TCP security protocol and / or IEC 60870-5-104 protocol, IEC 61850 protocol and physical connection using optical fiber (151).

3. The DC switchgear based on intelligent operation and maintenance and GOOSE system according to claim 1, characterized in that: The communication connection between the first GOOSE switch (112) and the second GOOSE switch (113) and the first GOOSE switch (112) and the second GOOSE switch (113) of the left neighboring station DC switch (2) and the right neighboring station DC switch (3) is through the GOOSE protocol and is physically connected by optical fiber (151).

4. The DC switchgear based on intelligent operation and maintenance and GOOSE system according to claim 1, characterized in that: The communication connections between the first GOOSE switch (112) and the second GOOSE switch (113) and the DC traction protection devices in the DC incoming cabinet (13), feeder cabinet (12), and negative pole cabinet (14) are respectively connected through the first group of GOOSE communication protocols and the second group of GOOSE communication protocols and are physically connected using Ethernet cables (152).

5. The DC switchgear based on intelligent operation and maintenance and GOOSE system according to claim 1, characterized in that: The external interface of the intelligent operation and maintenance switch (115) is connected to the external intelligent operation and maintenance backend (5) through the Modbus TCP security protocol and / or IEC 60870-5-104 protocol, IEC 61850 protocol and physical connection using optical fiber (151).

6. The DC switchgear based on intelligent operation and maintenance and GOOSE system according to claim 1, characterized in that: The terminal cabinet (11) panel is equipped with an intelligent monitoring unit (114), which is equipped with a display device and an interactive device and is connected to the intelligent operation and maintenance switch (115).

7. The DC switchgear based on intelligent operation and maintenance and GOOSE system according to claim 1, characterized in that: The device includes a circuit breaker characteristic monitoring device (161) installed on the circuit breaker inside the cabinet. The circuit breaker characteristic monitoring device (161) is connected to the intelligent operation and maintenance switch (115) through communication. The communication connection is physically connected via Modbus TCP security protocol and / or IEC 60870-5-104 protocol, IEC 61850 protocol and Ethernet cable (152).

8. The DC switchgear based on intelligent operation and maintenance and GOOSE system according to claim 1, characterized in that: The circuit breaker includes a circuit breaker contact temperature measuring device (162) installed on the circuit breaker inside the cabinet. The circuit breaker contact temperature measuring device (162) is connected to the intelligent operation and maintenance switch (115) through a wireless temperature measuring receiver (164) installed inside the cabinet. The communication connection is made through the Modbus TCP security protocol and / or the IEC 60870-5-104 protocol and the IEC 61850 protocol, and is physically connected using an Ethernet cable (152).

9. The DC switchgear based on intelligent operation and maintenance and GOOSE system according to claim 1, characterized in that: The device includes a busbar temperature measuring device (163) installed on the busbar inside the cabinet. The busbar temperature measuring device (163) is connected to the intelligent operation and maintenance switch (115) through a wireless temperature measuring receiver (164) installed inside the cabinet. The communication connection is made through the Modbus TCP security protocol and / or the IEC 60870-5-104 protocol and the IEC 61850 protocol, and is physically connected using an Ethernet cable (152).

10. The DC switchgear based on intelligent operation and maintenance and GOOSE system according to claim 1, characterized in that: The intelligent operation and maintenance switch (115) communicates with the DC traction protection devices in the DC incoming cabinet (13), feeder cabinet (12), and negative electrode cabinet (14) through Modbus TCP security protocol and / or IEC 60870-5-104 protocol, IEC 61850 protocol and is physically connected by Ethernet cable (152).

Images