Power equipment fault monitoring and alarming equipment

Abstract

The invention belongs to the technical field of power detection, and particularly provides power equipment fault monitoring and alarming equipment. Comprising a residual current transformer, an electric field sensor, a temperature sensor, a vibration sensor, a gas sensor, a magnetic field sensor, a self-checking current generation module, a signal conditioning module, a main control module, a memory, an alarm, a human-computer interface, a communication module and an execution relay. The residual current transformer is electrically connected with the self-checking current generation module and the signal conditioning module. The electric field sensor, the temperature sensor, the vibration sensor, the gas sensor and the magnetic field sensor are electrically connected to the input end of the signal conditioning module; the output end of the signal conditioning module is electrically connected to the main control module; the main control module is electrically connected with the memory, the communication module, the alarm, the human-computer interface and the execution relay respectively; and the main control module is bidirectionally and electrically connected with the memory and the communication module. Therefore, power equipment fault detection can be realized.

Description

Technical Field

[0001] The present invention relates to the technical field of electric power detection, and in particular to an electric power equipment fault monitoring and alarm device. Background Art

[0002] With the development of social production and the improvement of people's living standards, power safety has become a national strategic and social priority. As the core device of the electrical protection system, the leakage protector plays an irreplaceable role in the safe operation of power equipment. Its performance and reliability directly affect personal safety and the effectiveness of equipment protection.

[0003] When power equipment fails, the amount of information is small, the detection methods are limited, and the fault diagnosis is difficult. However, minor faults can easily cause deviations in the output value, thereby causing the protector to malfunction or refuse to operate. Summary of the Invention

[0004] In view of the above-mentioned defects, the present invention provides a power equipment fault monitoring and alarm device, which can comprehensively detect various faults of the power equipment.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: an electric power equipment fault monitoring and alarm device, comprising a residual current transformer, an electric field sensor, a temperature sensor, a vibration sensor, a gas sensor, a magnetic field sensor, a self-test current generating module, a signal conditioning module, a main control module, a memory, an alarm, a human-machine interface, a communication module and an execution relay; the residual current transformer is electrically connected to the self-test current generating module and the signal conditioning module respectively; the electric field sensor, temperature sensor, vibration sensor, gas sensor and magnetic field sensor are all electrically connected to the input end of the signal conditioning module; the output end of the signal conditioning module is electrically connected to the main control module; the main control module is electrically connected to the memory, communication module, alarm, human-machine interface and execution relay respectively; the main control module is electrically connected to the memory and communication module in a bidirectional manner.

[0006] As a further improvement of the present invention, a suction cup is provided on the other side of the mounting base, and the base is also included. A first electric telescopic rod is provided on the top of the base, and the gas sensor is fixed on the top of the rod; a second electric telescopic rod is provided above one side of the base, and the high-frequency magnetic field sensor and the low-frequency magnetic field sensor are fixed at the end thereof; a third electric telescopic rod is provided below the second electric telescopic rod on the base, and a mounting plate is provided at the end thereof, and the electric field sensor and the temperature sensor are fixed on the mounting plate; a fourth electric telescopic rod is provided below the third electric telescopic rod on the base, and the vibration sensor is fixed at the end thereof, and the signal conditioning module, alarm and human-machine interface are internally provided below the fourth telescopic rod on the base.

[0007] As a further improvement of the present invention, the magnetic field sensor includes a high-frequency magnetic field sensor and a low-frequency magnetic field sensor; the high-frequency magnetic field sensor is an anisotropic magnetoresistive sensor; the low-frequency magnetic field sensor is a Hall sensor; and an annular magnetic field interference shielding cover is provided outside the magnetic field sensor.

[0008] As a further improvement of the present invention, the magnetic field interference shielding cover is a Permalloy cover.

[0009] As a further improvement of the present invention, a protective cover is hingedly connected below the fourth electric telescopic rod on the side of the base away from the suction cup; the signal conditioning module, alarm and human-machine interface are installed in the protective cover.

[0010] As a further improvement of the present invention, the electric field sensor, temperature sensor, vibration sensor, gas sensor, high-frequency magnetic field sensor, and low-frequency magnetic field sensor are all connected to a ground wire; the ground wire penetrates into the interior of the base and exits from the bottom of the base.

[0011] As a further improvement of the present invention, a protective tube is provided outside the ground wire.

[0012] As a further improvement of the present invention, the gas sensor is a gas sensitive sensor for detecting SF6 decomposition products; the temperature sensor is an infrared thermal imaging sensor; the vibration sensor is a piezoelectric sensor; and the electric field sensor is a non-contact optical electric field sensor.

[0013] Beneficial effects of the present invention: By deploying a variety of complementary non-contact or indirect contact sensors (electric field, infrared, magnetic field, vibration, gas, and leakage current), the system covers the main fault types within power equipment (insulation, overheating, mechanical, arc, and leakage). Signal conditioning ensures signal quality, and the main control module's intelligent analysis (threshold determination, multi-sensor fusion diagnosis, and trend analysis) enables accurate fault identification. Ultimately, alarms and responses are provided through multiple channels, including alarms, displays, communications, and actuator relays, forming a comprehensive, intelligent, and proactive internal fault monitoring and alarm system for power equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a working diagram of the power equipment fault monitoring and alarm device of the present invention; Figure 2 It is a structural diagram of motor equipment fault detection and alarm equipment.

[0015] In the figure: 1-base, 2-suction cup, 3-ground wire, 4-protective tube, 5-gas sensor, 6-first electric telescopic rod, 7-second electric telescopic rod, 8-magnetic field interference shielding cover, 9-high-frequency magnetic field sensor, 10-low-frequency magnetic field sensor, 11-third electric telescopic rod, 12-electric field sensor, 13-temperature sensor, 14-mounting plate, 15-vibration sensor, 16-third electric telescopic frame, 17-protective cover, 18-alarm, 19-human-machine interface, 20-signal conditioning module. DETAILED DESCRIPTION

[0016] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings. It should be understood that the specific examples described herein are merely for the purpose of explaining the present invention and are not intended to limit the present invention. The directional terms mentioned in the following embodiments, such as up, down, left, right, front or back, etc., are merely references to the directions in the accompanying drawings. Therefore, the directional terms used are for illustration and are not intended to limit the present invention. In addition, the same reference numerals represent the same elements throughout the embodiments.

[0017] like Figure 1 As shown, this patent discloses a power equipment fault monitoring and alarm device, including a residual current transformer, an electric field sensor 12, a temperature sensor 13, a vibration sensor 15, a gas sensor 5, a magnetic field sensor, a self-test current generating module, a signal conditioning module 20, a main control module, a memory, an alarm 18, a human-machine interface 19, a communication module and an execution relay. The residual current transformer of the detection module establishes electrical connections with the self-test current generating module and the signal conditioning module 20 respectively.

[0018] The residual current transformer (RCT) is a leakage current transformer used to detect internal leakage in power equipment. The electric field sensor 12 is a non-contact optical electric field sensor used to detect changes in the electric field within the power equipment. The temperature sensor 13 is an infrared thermal imaging sensor used to detect temperature changes within the power equipment. The vibration sensor 15 is a piezoelectric sensor used to detect mechanical faults. The gas sensor 5 is a gas sensor for detecting SF6 decomposition products.

[0019] The magnetic field sensor includes a high-frequency magnetic field sensor 9 and a low-frequency magnetic field sensor 10. The high-frequency magnetic field sensor 9 is an anisotropic magnetoresistive (AMR) sensor, and the low-frequency magnetic field sensor 10 is a Hall effect sensor. A magnetic field interference shield 8 is provided outside the magnetic field sensor. The magnetic field interference shield 8 is an annular Permalloy shield.

[0020] As a further illustration of this embodiment, the high-frequency magnetic field sensor 9 and the low-frequency magnetic field sensor 10 can detect changes in the electromagnetic field inside the power equipment without contact, and the magnetic field interference shielding cover 8 can shield external electromagnetic interference to ensure the accuracy of detection.

[0021] The electric field sensor 12, temperature sensor 13, vibration sensor 15, gas sensor 5, and magnetic field sensor are all electrically connected to the input of the signal conditioning module 20. The output of the signal conditioning module 20 is electrically connected to the control processing module. The control processing module is electrically connected to the storage module. The control processing module and the storage module are bidirectionally electrically connected. The control processing module and the communication unit are bidirectionally wirelessly connected. The control processing module is electrically connected to the alarm module, the control processing module is electrically connected to the display module, and the control processing module is electrically connected to the relay. The control unit is also electrically connected to the residual current transformer, which is electrically connected to the signal conditioning module 20.

[0022] The specific structure of the power equipment fault monitoring and alarm device includes a base 1, with suction cups 2 fixed on the upper and lower sides of one end.

[0023] A first electric telescopic rod 6 is provided on the top of the base 1 , and a gas sensor 5 is fixedly connected to the top of the first electric telescopic rod 6 .

[0024] A second electric telescopic rod 7 is provided on the upper part of the base 1 away from the suction cup 2, and a high-frequency magnetic field sensor 9 and a low-frequency magnetic field sensor 10 are fixed to the end of the second electric telescopic rod 7. A magnetic field interference shielding cover 8 is fixed to the end of the second electric telescopic rod 7 and is arranged around the outside of the high-frequency magnetic field sensor 9 and the low-frequency magnetic field sensor 10.

[0025] A third electric telescopic rod 11 is provided below the second electric telescopic rod 7 on the side of the base 1 away from the suction cup 2. A mounting plate 14 is provided at the end of the third electric telescopic rod 11, and an electric field sensor 12 and a temperature sensor 13 are fixed on the mounting plate 14.

[0026] A fourth electric telescopic rod is provided below the third electric telescopic frame 16 on the side of the base 1 away from the suction cup 2 , and a vibration sensor 15 is fixed to the end of the third electric telescopic rod 11 .

[0027] A hinged protective cover 17 is provided below the fourth electric telescopic rod on the side of the base 1 away from the suction cup 2. A signal conditioning module 20, an alarm 18, and a human-machine interface 19 are provided inside the protective cover 17.

[0028] The electric field sensor 12, temperature sensor 13, vibration sensor 15, gas sensor 5, magnetic field sensor, and vibration sensor 15 are all connected to a ground wire 3. The ground wire 3 penetrates into the interior of the base 1 and exits from the bottom of the base 1. A protective tube 4 is provided outside the ground wire 3, and the end of the ground wire 3 is connected to the ground.

[0029] The working principle and use process of the present invention: 1. Leakage Fault Detection: A residual current transformer (RCT) is placed around the ground wire or related conductors of power equipment to detect abnormal leakage current from the equipment's internal conductors to the ground (or casing). This is a key indicator of insulation degradation or breakdown. Simultaneously, a self-test current generator module periodically injects an analog signal into the RCT to verify the integrity of the RCT and the detection circuit, ensuring detection reliability.

[0030] 2. Insulation Degradation / Partial Discharge Detection: The electric field sensor 12 uses optical principles to detect changes in power-frequency or high-frequency (partial discharge) electric field strength at critical locations within the equipment (such as near insulators and bushings) without physical contact. Abnormal electric field distortion or increased intensity can indicate contamination or moisture on the insulation surface, or the presence of partial discharge within the insulation.

[0031] High-frequency magnetic field sensor 9: Specialized for detecting high-frequency (MHz-level) pulsed magnetic field signals generated by partial discharge activity. Partial discharge is an early sign of internal insulation defects (such as air gaps and impurities) and generates strong electromagnetic radiation.

[0032] The combination of the two provides more comprehensive and sensitive insulation condition and partial discharge monitoring capabilities.

[0033] 3. Overheating fault detection: The temperature sensor 13 uses non-contact infrared imaging technology to scan or monitor the surface temperature distribution and changes of key components within power equipment (such as connection points, conductors, switch contacts, transformer winding hot spots, etc.). It can identify abnormal local or overall temperature increases caused by overload, poor contact, abnormal heat dissipation, etc.

[0034] 4. Mechanical Fault Detection: Vibration sensor 15 is placed against the equipment housing or key support structure via the first motorized telescopic rod 6 to detect mechanical vibration signals generated during operation. Abnormal vibration patterns, frequencies, or amplitudes (such as those caused by looseness, wear, deformation, imbalance, bearing failure, and internal foreign matter) are captured and analyzed for mechanical fault diagnosis.

[0035] 5. Internal Arc / Overheat Decomposition Detection (for SF6 Equipment): Gas sensor 5 monitors the internal gas composition of equipment filled with SF6 gas (such as GIS, GIL, and circuit breakers). When internal overheating or arc faults occur, SF6 gas decomposes to produce characteristic products such as SO2, H2S, CO, and HF. Detecting abnormally high concentrations of these decomposition products provides direct evidence of a serious internal fault, especially an arc fault.

[0036] 6. Electromagnetic State / Load / Low-Frequency Fault Detection: Magnetic field sensors detect the magnetic field generated by power-frequency current around power equipment. Its intensity is related to the equipment's operating current (load). Abnormal changes (such as phase loss, severe overload, or internal high-current faults) can cause significant changes in the magnetic field pattern or intensity. The sensor is also used to monitor low-frequency magnetic anomalies caused by high-current surges and ferromagnetic resonance.

[0037] The output signals of all sensors are first transmitted to the signal conditioning module 20. This module amplifies, filters (denoises), isolates, and linearizes the raw signals, converting them into stable, clean analog or digital signals suitable for processing by the main control module. The processed signals are then fed into the main control module (control processing module).

[0038] The main control module performs the following key tasks: It performs real-time calculations and feature extraction (such as peak value, RMS value, frequency content, and trend changes) on each channel's signals. It compares the analysis results with preset safety thresholds stored in memory. It combines information from multiple sensors for comprehensive analysis and fault pattern identification. It also uses stored historical data for trend analysis and potential fault prediction.

[0039] If any abnormality exceeding a threshold is detected or a specific fault mode is identified, the main control module immediately triggers an alarm 18 (with audible and visual alarms). The alarm information and device status data are wirelessly transmitted to a remote monitoring center or operator's terminal via the communication module. If a serious fault (such as severe leakage or internal arcing) is detected, the main control module controls the execution of relays, directly cutting off the power supply or activating other protective devices to prevent the incident from escalating. All raw data, analysis results, and alarm events are recorded in memory for subsequent query and analysis. Detailed fault information (type, location, severity) and real-time data are displayed via the human-machine interface 19.

[0040] The above are merely preferred embodiments of the present invention. The scope of protection of the present invention is not limited to the above-mentioned implementation measures. All technical solutions based on the principles of the present invention are within the scope of protection of the present invention. It should be noted that for those skilled in the art, various improvements and modifications that do not depart from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A power equipment fault monitoring and alarm device, characterized in that: The invention comprises a residual current transformer, an electric field sensor (12), a temperature sensor (13), a vibration sensor (15), a gas sensor (5), a magnetic field sensor, a self-test current generating module, a signal conditioning module (20), a main control module, a memory, an alarm (18), a human-machine interface (19), a communication module and an execution relay; the residual current transformer is electrically connected to the self-test current generating module and the signal conditioning module (20) respectively; the electric field sensor (12), the temperature sensor (13), the vibration sensor (15), the gas sensor (5) and the magnetic field sensor are all electrically connected to the input end of the signal conditioning module (20); the output end of the signal conditioning module (20) is electrically connected to the main control module; the main control module is electrically connected to the memory, the communication module, the alarm (18), the human-machine interface (19) and the execution relay respectively; the main control module is electrically connected to the memory and the communication module in a bidirectional manner.

2. The power equipment fault monitoring and alarm device according to claim 1, characterized in that: The invention also includes a base (1), wherein a first electric telescopic rod (6) is provided on the top of the base (1), and the gas sensor (5) is fixed on the top of the first electric telescopic rod; a second electric telescopic rod (7) is provided on the upper side of the base (1), and the high-frequency magnetic field sensor (9) and the low-frequency magnetic field sensor (10) are fixed at the end thereof; a third electric telescopic rod (11) is provided below the second electric telescopic rod (7) on the base (1), and a mounting plate (14) is provided at the end thereof, and the electric field sensor (12) and the temperature sensor (13) are fixed on the mounting plate (14); a fourth electric telescopic rod is provided below the third electric telescopic rod (11) on the base (1), and the vibration sensor (15) is fixed at the end thereof; and a signal conditioning module (20), an alarm (18) and a human-machine interface (19) are provided inside the fourth telescopic rod on the base (1).

3. The power equipment fault monitoring and alarm device according to claim 2, characterized in that: The magnetic field sensor comprises a high-frequency magnetic field sensor (9) and a low-frequency magnetic field sensor (10); the high-frequency magnetic field sensor (9) is an anisotropic magnetoresistive sensor; the low-frequency magnetic field sensor (10) is a Hall sensor; and an annular magnetic field interference shielding cover (8) is provided outside the magnetic field sensor.

4. The power equipment fault monitoring and alarm device according to claim 3, characterized in that: The magnetic field interference shielding cover (8) is a Permalloy cover.

5. The power equipment fault monitoring and alarm device according to claim 2, characterized in that: A protective cover (17) is hingedly connected below the fourth electric telescopic rod on the side of the base (1) away from the suction cup (2); the signal conditioning module (20), the alarm (18) and the human-machine interface (19) are installed in the protective cover (17).

6. The power equipment fault monitoring and alarm device according to claim 2, characterized in that: The electric field sensor (12), the temperature sensor (13), the vibration sensor (15), the gas sensor (5), the high-frequency magnetic field sensor (9), and the low-frequency magnetic field sensor (10) are all connected to a ground wire (3); the ground wire (3) penetrates into the interior of the base (1) and exits from the bottom of the base (1).

7. The power equipment fault monitoring and alarm device according to claim 6, characterized in that: A protective tube (4) is provided outside the ground wire (3).

8. The power equipment fault monitoring and alarm device according to claim 1, characterized in that: The gas sensor (5) is a gas-sensitive sensor for detecting SF6 decomposition products; the temperature sensor (13) is an infrared thermal imaging sensor; the vibration sensor (15) is a piezoelectric sensor; and the electric field sensor (12) is a non-contact optical electric field sensor (12).

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