Transformer area branch monitoring device based on low-voltage loop fault judgment and positioning

Abstract

The utility model provides a transformer area branch monitoring device based on low-voltage loop fault discrimination and positioning, which comprises a branch monitoring terminal host, an auxiliary machine, a wireless temperature sensor and an open-close type high-precision current transformer, and the analog signal input end of the wireless temperature sensor is the analog signal input end of the transformer area branch monitoring device. The digital signal output end of the wireless temperature sensor is connected with the digital signal input end of the branch monitoring terminal host, and the digital signal output end of the open-close type high-precision current transformer is connected with the digital signal input end of the branch monitoring terminal host. The control signal output end of the branch monitoring terminal host is connected with the control signal input end of the auxiliary machine, the control signal output end of the auxiliary machine is the control signal output end of the transformer area branch monitoring device, and the transformer area branch monitoring device achieves fault judgment and positioning of transformer area branch monitoring through the hardware components.

Description

Technical Field

[0001] The utility model provides a substation branch monitoring device based on low-voltage circuit fault identification and positioning, belonging to the field of branch monitoring. Background Art

[0002] In low-voltage power distribution systems, fault identification and location of branch circuits are crucial to ensure the stable operation of power systems. Traditional methods for identifying and locating low-voltage circuit faults mainly rely on manual inspections and simple electrical testing equipment. This method is not only inefficient, but also easily affected by human factors, resulting in inaccurate fault location or delayed processing. With the development of science and technology, the level of intelligence and automation of power systems continues to improve, and higher requirements are also put forward for fault identification and location of branch circuits. At present, there are some low-voltage circuit monitoring devices based on sensors and communication technologies on the market, but they still need to be improved in terms of fault identification accuracy, positioning speed, and system stability. In particular, existing monitoring devices can often only realize a single fault detection function, such as overcurrent, overvoltage, undervoltage, etc., and cannot comprehensively identify and locate multiple faults. In addition, due to the complexity of the low-voltage power distribution system, the fault signal is often affected by various interferences and noises, resulting in low accuracy of the fault identification results. Utility Model Content

[0003] In order to solve the technical problems existing in the above-mentioned prior art, the utility model proposes a substation branch monitoring device based on low-voltage circuit fault identification and positioning, and the technical features adopted are as follows:

[0004] A substation branch monitoring device based on low-voltage circuit fault identification and positioning, the substation branch monitoring device comprises:

[0005] The branch monitoring terminal host, auxiliary machine, wireless temperature sensor and open-and-close high-precision current transformer, the analog signal input end of the wireless temperature sensor is the analog signal input end of the substation branch monitoring device, the digital signal output end of the wireless temperature sensor is connected to the digital signal input end of the branch monitoring terminal host, the digital signal output end of the open-and-close high-precision current transformer is connected to the digital signal input end of the branch monitoring terminal host, the control signal output end of the branch monitoring terminal host is connected to the control signal input end of the auxiliary machine, and the control signal output end of the auxiliary machine is the control signal output end of the substation branch monitoring device.

[0006] Preferably, the branch monitoring terminal host is equipped with a high-speed AD converter, a high-speed DSP+FPU processor and a data processing module.

[0007] Preferably, the analog signal input end of the high-speed AD converter is the analog signal input end of the branch monitoring terminal host, the digital signal output end of the high-speed AD converter is connected to the digital signal input end of the high-speed DSP+FPU processor, the digital signal output end of the high-speed DSP+FPU processor is connected to the digital signal input end of the data processing module, and the digital signal output end of the data processing module is the digital signal output end of the branch monitoring terminal.

[0008] Preferably, the data processing module is bidirectionally connected to the data storage module, the LED display module, the dual-mode communication module, the RS-485 communication interface, the RS232 communication interface, the high-precision real-time clock and the auxiliary machine control interface.

[0009] Preferably, the branch monitoring terminal host is connected to the background monitoring main station through a dual-mode communication module, TTU or 4G communication module.

[0010] Preferably, the digital signal input end of the RS-485 communication interface is respectively connected to the digital signal output end of the electric meter or the sensor module.

[0011] Preferably, the branch monitoring terminal hosts are respectively installed at various branch points of the intelligent substation to form a topological structure.

[0012] Preferably, the LED display module includes a single-circuit LED module, a four-circuit LED module, a five-circuit LED module and a six-circuit LED module, and the single-circuit LED module, the four-circuit LED module, the five-circuit LED module and the six-circuit LED module are respectively arranged on the terminal panel to constitute a single-circuit branch monitoring terminal panel, a four-circuit branch monitoring terminal panel, a five-circuit branch monitoring terminal panel and a six-circuit branch monitoring terminal panel.

[0013] Preferably, a backup power supply is provided inside the branch monitoring terminal host, a power signal output end of the backup power supply is connected to a power signal input end of the branch monitoring terminal host, and the backup power supply is a super energy storage capacitor.

[0014] Preferably, the split-type high-precision current transformer is provided with a locking mechanism.

[0015] The beneficial effects of the utility model are as follows: the utility model realizes real-time monitoring of the temperature and current of the branch line through the wireless temperature sensor and the open-close high-precision current transformer. The branch monitoring terminal host has a powerful data processing capability and can quickly process a large amount of data. The host can accurately judge the operating status of the branch line and discover potential problems in time. The auxiliary machine, as an actuator, can flexibly perform various operations according to the control signal sent by the host. This flexible control function enables the entire system to be adaptively adjusted according to actual needs, improving the adaptability and reliability of the system. The use of wireless temperature sensors makes the system deployment more flexible and not restricted by wiring. The entire system adopts a modular design, and the various components are connected through standard interfaces for easy maintenance and upgrading. The device consists of a branch monitoring terminal host, an auxiliary machine (optional, topology information source terminal, which can be embedded in the device body), a wireless temperature sensor (optional, to achieve multi-channel wireless temperature measurement) and an open-close high-precision current transformer. The host realizes the measurement and metering of electrical parameters and real-time fault judgment. The branch monitoring terminal host has a built-in high-speed AD converter and a high-speed DSP+FPU processor, which can simultaneously realize the electrical parameter measurement and metering of 6 three-phase and up to 27 channels. The branch monitoring terminal host has a built-in high-precision real-time clock. The branch monitoring terminal uses a dual-mode (HPLC+wireless) communication module to communicate with the TTU or directly communicates with the background monitoring main station through a 4G communication module (optional), and has a built-in super energy storage capacitor. When a line fault occurs and the circuit breaker trips, the branch monitoring terminal loses external power supply, and the fault information can still be sent to the TTU wirelessly. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the utility model's branch monitoring device for the substation area;

[0017] Figure 2 This is a schematic diagram of the composition of the branch monitoring terminal host;

[0018] Figure 3 It is a schematic diagram of the connection between the data processing module and the functional module;

[0019] Figure 4 It is a schematic diagram of communication connection;

[0020] Figure 5 It is a schematic diagram of the topological structure;

[0021] Figure 6 It is a schematic diagram of the overall structure. DETAILED DESCRIPTION

[0022] The present invention will be further described below in conjunction with specific embodiments, but the present invention is not limited by the embodiments.

[0023] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "top", "bottom", "inside", "outside" and "vertical" indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0024] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] In addition, in the description of the present utility model, unless otherwise specified, "multiple", "multiple groups" and "multiple roots" mean two or more.

[0026] Unless otherwise specified, the materials, instruments and methods used in the following embodiments are conventional materials, instruments and methods in the art and can be obtained through commercial channels.

[0027] Example 1

[0028] A substation branch monitoring device based on low-voltage circuit fault identification and positioning, the substation branch monitoring device comprises:

[0029] The branch monitoring terminal host, auxiliary machine, wireless temperature sensor and open-and-close high-precision current transformer, the analog signal input end of the wireless temperature sensor is the analog signal input end of the substation branch monitoring device, the digital signal output end of the wireless temperature sensor is connected to the digital signal input end of the branch monitoring terminal host, the digital signal output end of the open-and-close high-precision current transformer is connected to the digital signal input end of the branch monitoring terminal host, the control signal output end of the branch monitoring terminal host is connected to the control signal input end of the auxiliary machine, and the control signal output end of the auxiliary machine is the control signal output end of the substation branch monitoring device.

[0030] The principle and effect of the above content are as follows: The wireless temperature sensor is responsible for real-time monitoring of the temperature information in the environment. The temperature change is converted into an analog signal through a temperature sensing element inside the sensor. The analog signal is output from the analog signal input end of the sensor as the analog signal input of the branch monitoring device of the substation. The sensor also contains an analog-to-digital converter (ADC) to convert the analog signal into a digital signal. The digital signal is sent to the branch monitoring terminal host through the digital signal output end of the sensor. The current transformer is responsible for real-time monitoring of the current information in the circuit. Through the principle of magnetic induction, the open-close design enables the transformer to measure the current non-invasively. The transformer converts the measured current information into a digital signal. The digital signal is sent to the branch monitoring terminal host through the digital signal output end of the transformer. The branch monitoring terminal host is the core of the system and is responsible for receiving and processing data from the wireless temperature sensor and the current transformer. The host receives the digital signals of the wireless temperature sensor and the current transformer through the digital signal input end. The host analyzes, calculates and processes these signals to extract key information such as temperature and current. The host generates corresponding control signals based on the processing results. The control signal is sent to the slave through the control signal output end of the host.

[0031] As the actuator of the system, the slave receives the control signal from the branch monitoring terminal host. The control signal enters the slave through the control signal input terminal of the slave. The slave performs the corresponding action or operation according to the received control signal. The control signal output terminal of the slave is the control signal output of the entire substation branch monitoring device, which is used to control other equipment or systems. Through the wireless temperature sensor and the open-close high-precision current transformer, the temperature and current of the branch line are monitored in real time. The digital signal transmission method ensures the accuracy and stability of the data and reduces the interference and loss during the signal transmission process.

[0032] The branch monitoring terminal host has powerful data processing capabilities, can quickly process large amounts of data, and extract key information. The host can accurately determine the operating status of the branch line and discover potential problems in a timely manner. As an actuator, the slave can flexibly perform various operations according to the control signal sent by the host. This flexible control function enables the entire system to be adaptively adjusted according to actual needs, improving the adaptability and reliability of the system. The use of wireless temperature sensors makes system deployment more flexible and free from wiring restrictions. The entire system adopts a modular design, and the various components are connected through standard interfaces for easy maintenance and upgrading. This device consists of a branch monitoring terminal host, a slave (optional, topology information source terminal, which can be embedded in the device body), a wireless temperature sensor (optional, to achieve multi-channel wireless temperature measurement) and an open-close high-precision current transformer. The host realizes the measurement, metering and real-time fault judgment of electrical parameters, and at the same time controls the slave (optional, which can be embedded in the device body) to generate characteristic state sequence signals to realize the topology identification of the branch line in the substation area. The branch monitoring terminal host has a built-in high-speed AD converter and a high-speed DSP+FPU processor, which can simultaneously realize the electrical parameter measurement and metering of 6 three-phase and up to 27 channels. The branch monitoring terminal host has a built-in high-precision real-time clock. The branch monitoring terminal uses a dual-mode (HPLC+wireless) communication module to communicate with the TTU or directly communicates with the background monitoring main station through a 4G communication module (optional), and has a built-in super energy storage capacitor. When a line fault occurs and the circuit breaker trips, the branch monitoring terminal loses external power supply, and the fault information can still be sent to the TTU wirelessly.

[0033] Example 2

[0034] In Example 2, the branch monitoring terminal host is equipped with a high-speed AD converter, a high-speed DSP+FPU processor and a data processing module. Figure 2 As shown. The analog signal input end of the high-speed AD converter is the analog signal input end of the branch monitoring terminal host, and the digital signal output end of the high-speed AD converter is connected to the digital signal input end of the high-speed DSP+FPU processor, and the digital signal output end of the high-speed DSP+FPU processor is connected to the digital signal input end of the data processing module, and the digital signal output end of the data processing module is the digital signal output end of the branch monitoring terminal. The data processing module is a hardware module of the high-speed data processing unit. The data processing module is bidirectionally connected to the data storage module, LED display module, dual-mode communication module, RS-485 communication interface, RS232 communication interface, high-precision real-time clock and auxiliary machine control interface respectively. The data storage module, LED display module, dual-mode communication module, RS-485 communication interface, RS232 communication interface, high-precision real-time clock and auxiliary machine control interface are all functional modules, and the connection relationship is as shown in the figure. Figure 3As shown, the branch monitoring terminal host is connected to the background monitoring main station through a dual-mode communication module, TTU or 4G communication module, such as Figure 4 As shown. The digital signal input end of the RS-485 communication interface is connected to the digital signal output end of the meter or sensor module. The sensor module includes all sensors used by the branch monitoring terminal host to collect signals, including current sensors, voltage sensors, battery-powered sensors, CT induction power supply sensors, and temperature sensors. The branch monitoring terminal host is installed at each branch point of the intelligent substation to form a topological structure, such as Figure 5 As shown, LTU is a branch monitoring terminal host. The LED display module includes a single-circuit LED module, a four-circuit LED module, a five-circuit LED module and a six-circuit LED module, which are respectively arranged on the terminal panel to form a single-circuit branch monitoring terminal panel, a four-circuit branch monitoring terminal panel, a five-circuit branch monitoring terminal panel and a six-circuit branch monitoring terminal panel. The single-loop LED module includes 6 indicator lights, namely, an operation indicator light, an active indicator light, an uplink communication indicator light, an RS-485I communication indicator light, an RS-485II communication indicator light and a fault indicator light; the four-loop LED module includes 9 indicator lights, namely, a power indicator light, an operation indicator light, a carrier communication indicator light, an RS485 communication indicator light, an alarm indicator light, a line 1 fault light, a line 2 fault light, a line 3 fault light and a line 4 fault light; the five-loop LED module includes 9 LED indicator lights, namely, a power indicator light, an operation indicator light, a communication indicator light, a device abnormality light, a line 1 fault light, a line 2 fault light, a line 3 fault light, a line 4 fault light and a line 5 fault light; the six-loop LED module includes 9 LED indicator lights, namely, a power indicator light, a communication indicator light, a device abnormality light, a line 1 fault light, a line 2 fault light, a line 3 fault light, a line 4 fault light, a line 5 fault light and a line 6 fault light.

[0035] The branch monitoring terminal host is internally provided with a backup power supply, a power signal output end of the backup power supply is connected to a power signal input end of the branch monitoring terminal host, and the backup power supply is a super energy storage capacitor.

[0036] The open-close high-precision current transformer is provided with a locking mechanism.

[0037] The principle and effect of the above content are as follows: the branch monitoring terminal host receives analog signals from external devices through its analog signal input terminal, and these signals are converted into digital signals through high-speed AD converters. The high-speed AD converter ensures the accuracy and real-time performance of signal conversion. The high-speed DSP+FPU processor receives digital signals from the high-speed AD converter. The processor can quickly analyze signal characteristics, extract key information, and make decisions and judgments based on preset algorithms. The data processing module further stores, filters and formats the processed data to prepare for the output of the terminal host. The data processing module sends the processed digital signal to the external device or system through the digital signal output terminal of the branch monitoring terminal host. The branch monitoring terminal host communicates with the background monitoring main station through the dual-mode communication module, TTU or 4G communication module to realize remote transmission and monitoring of data. At the same time, the host is also connected to the meter or sensor module through the RS-485 communication interface to realize local transmission and interaction of data. The branch monitoring terminal host has a built-in backup power supply and uses a super energy storage capacitor as an energy storage element. When the main power fails or is insufficient, the super energy storage capacitor can quickly release electric energy to ensure the normal operation of the terminal host and the safe storage of data. The LED module intuitively displays the operating status and fault information of the branch monitoring terminal host through the on and off and flashing status of the indicator light. Different types of LED modules correspond to different branch circuits, which is convenient for users to quickly locate and solve problems. The setting of the LED module enhances the maintainability of the system. The open-close high-precision current transformer measures the current in the circuit through the principle of magnetic induction, which has the characteristics of high precision and non-intrusiveness. The built-in locking mechanism of the transformer can automatically disconnect the circuit under abnormal conditions to protect the equipment and system from damage. This setting improves the accuracy and safety of current measurement. The combination of high-speed AD converter and high-speed DSP+FPU processor realizes the rapid acquisition and efficient processing of analog signals, ensuring the accuracy and real-time nature of data. The design of dual-mode communication module and multiple communication interfaces enables the system to flexibly adapt to different communication environments and needs, and realize remote and local transmission of data. As a backup power supply, the super energy storage capacitor can provide a stable power supply when the main power fails, ensuring the continuous operation of the system and the safety of data. This design reduces the risk of system failures caused by power problems and improves system reliability. The LED module uses intuitive indicator light display to enable users to quickly understand the operating status and fault information of the branch monitoring terminal host, improving the maintainability of the system. The open-close high-precision current transformer has high-precision measurement capabilities and can accurately reflect the current conditions in the circuit. The design of the locking mechanism can automatically disconnect the circuit under abnormal conditions, protect equipment and systems from damage, and improve the safety of the system.

[0038] All data storage, data analysis and control methods involved in the substation branch monitoring device involved in the utility model are existing technologies in the field. The utility model does not improve any software program and method. The utility model only designs the hardware structure of the branch monitoring terminal host, auxiliary machine, wireless temperature sensor and open-type high-precision current transformer. The methods or software programs involved in the hardware structure to realize the effects or functions of the branch monitoring terminal host, auxiliary machine, wireless temperature sensor and open-type high-precision current transformer are all designed by technicians of this field based on existing methods or software programs. Books, manuals or product manuals, combined with the functions involved in the principles and effects of the utility model, can be realized through independent program writing.

[0039] Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. Anyone familiar with this technology can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be based on the definition of the claims.

Claims

1. A branch monitoring device for a substation based on low-voltage circuit fault identification and positioning, characterized in that: The station area branch monitoring device comprises: The branch monitoring terminal host, auxiliary machine, wireless temperature sensor and open-and-close high-precision current transformer, the analog signal input end of the wireless temperature sensor is the analog signal input end of the substation branch monitoring device, the digital signal output end of the wireless temperature sensor is connected to the digital signal input end of the branch monitoring terminal host, the digital signal output end of the open-and-close high-precision current transformer is connected to the digital signal input end of the branch monitoring terminal host, the control signal output end of the branch monitoring terminal host is connected to the control signal input end of the auxiliary machine, and the control signal output end of the auxiliary machine is the control signal output end of the substation branch monitoring device.

2. According to claim 1, the substation branch monitoring device based on low-voltage circuit fault identification and positioning is characterized in that: The branch monitoring terminal host is equipped with a high-speed AD converter, a high-speed DSP+FPU processor and a data processing module.

3. According to claim 2, the substation branch monitoring device based on low-voltage circuit fault identification and positioning is characterized in that: The analog signal input end of the high-speed AD converter is the analog signal input end of the branch monitoring terminal host, the digital signal output end of the high-speed AD converter is connected to the digital signal input end of the high-speed DSP+FPU processor, the digital signal output end of the high-speed DSP+FPU processor is connected to the digital signal input end of the data processing module, and the digital signal output end of the data processing module is the digital signal output end of the branch monitoring terminal.

4. According to claim 2, the substation branch monitoring device based on low-voltage circuit fault identification and positioning is characterized in that: The data processing module is bidirectionally connected to the data storage module, the LED display module, the dual-mode communication module, the RS-485 communication interface, the RS232 communication interface, the high-precision real-time clock and the auxiliary machine control interface.

5. The substation branch monitoring device based on low-voltage circuit fault identification and positioning according to claim 4 is characterized in that: The branch monitoring terminal host is connected to the background monitoring main station through a dual-mode communication module, TTU or 4G communication module.

6. The substation branch monitoring device based on low-voltage circuit fault identification and positioning according to claim 4 is characterized in that: The digital signal input end of the RS-485 communication interface is connected to the digital signal output end of the electric meter or the sensor module respectively.

7. The substation branch monitoring device based on low-voltage circuit fault identification and positioning according to claim 1 is characterized in that: The branch monitoring terminal hosts are respectively installed at various branch points of the intelligent substation to form a topological structure.

8. The substation branch monitoring device based on low-voltage circuit fault identification and positioning according to claim 4 is characterized in that: The LED display module includes a single-circuit LED module, a four-circuit LED module, a five-circuit LED module and a six-circuit LED module. The single-circuit LED module, the four-circuit LED module, the five-circuit LED module and the six-circuit LED module are respectively arranged on the terminal panel to constitute a single-circuit branch monitoring terminal panel, a four-circuit branch monitoring terminal panel, a five-circuit branch monitoring terminal panel and a six-circuit branch monitoring terminal panel.

9. The substation branch monitoring device based on low-voltage circuit fault identification and positioning according to claim 1 is characterized in that: The branch monitoring terminal host is internally provided with a backup power supply, a power signal output end of the backup power supply is connected to a power signal input end of the branch monitoring terminal host, and the backup power supply is a super energy storage capacitor.

10. The substation branch monitoring device based on low-voltage circuit fault identification and positioning according to claim 1 is characterized in that: The open-close high-precision current transformer is provided with a locking mechanism.

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