High-frequency electromagnetic wave monitoring sensor and partial discharge monitoring device

Abstract

The invention discloses a high-frequency electromagnetic wave monitoring sensor and a partial discharge monitoring device, the high-frequency electromagnetic wave monitoring sensor comprises a dielectric substrate, an over-current component and an electromagnetic coupling plate, the dielectric substrate has a first surface and a second surface which are opposite, the first surface is attached to the over-current component, the over-current component is used for connecting a power system, and the electromagnetic coupling plate is arranged on the first surface. The second surface is fixedly attached to the electromagnetic coupling plate, one side edge of the electromagnetic coupling plate is provided with a signal output contact, and the over-current component, the dielectric substrate and the electromagnetic coupling plate form a capacitor structure with high-frequency response, so that when a high-frequency electromagnetic wave signal is generated on the over-current component of the power system, the over-current component can generate the high-frequency electromagnetic wave signal. And a high-frequency induction signal is generated on the electromagnetic coupling plate. The invention belongs to the field of monitoring sensors, and particularly relates to a high-frequency electromagnetic wave monitoring sensor and a partial discharge monitoring device.

Description

Technical Field

[0001] This invention belongs to the field of monitoring sensors, specifically referring to a high-frequency electromagnetic wave monitoring sensor and a partial discharge monitoring device. Background Technology

[0002] In power systems, partial discharge is a major cause of insulation aging and failures in power equipment. Timely and accurate monitoring of partial discharge is crucial for ensuring the safe and stable operation of power systems. Currently, commonly used partial discharge monitoring methods include electrical detection, ultrasonic detection, and chemical detection. Among these, methods based on high-frequency electromagnetic waves are widely used due to their advantages such as high sensitivity and strong anti-interference capabilities.

[0003] However, existing high-frequency electromagnetic wave monitoring sensors and partial discharge monitoring devices still have some shortcomings. For example, some sensors have poor high-frequency response characteristics, resulting in insufficient detection capability for weak high-frequency electromagnetic wave signals; some monitoring devices have complex structures, are inconvenient to install and maintain, and are easily affected by external interference, affecting the accuracy of monitoring results. Therefore, it is necessary to develop a high-frequency electromagnetic wave monitoring sensor and partial discharge monitoring device with better performance. Summary of the Invention

[0004] The present invention mainly addresses the aforementioned problems existing in the prior art.

[0005] To solve the above problems, the technical solution adopted by the present invention is as follows: The high-frequency electromagnetic wave monitoring sensor proposed by the present invention includes a dielectric substrate, a current-carrying component, and an electromagnetic coupling plate. The dielectric substrate has a first surface and a second surface opposite to each other. The first surface is attached to the current-carrying component, which is used to connect to a power system. The second surface is fixedly attached to the electromagnetic coupling plate. One side of the electromagnetic coupling plate has a signal output contact. The current-carrying component, the dielectric substrate, and the electromagnetic coupling plate form a capacitor structure with high-frequency response, so that when a high-frequency electromagnetic wave signal is generated on the current-carrying component of the power system, a high-frequency induced signal is generated on the electromagnetic coupling plate.

[0006] Furthermore, the dielectric substrate is made of a material with high dielectric constant and low loss characteristics.

[0007] Furthermore, the electromagnetic coupling plate is made of a highly conductive metal material.

[0008] The partial discharge monitoring device includes a high-frequency electromagnetic wave monitoring sensor, a signal processing unit, a data storage unit, and an alarm unit. The signal processing unit is electrically connected to the signal output contact of the high-frequency electromagnetic wave monitoring sensor and is used to amplify, filter, and perform analog-to-digital conversion on the high-frequency induced signal output by the sensor. The data storage unit is electrically connected to the signal processing unit and is used to store the processed signal data. The alarm unit is electrically connected to the signal processing unit and issues an alarm signal when the signal detected by the signal processing unit exceeds a preset threshold.

[0009] Furthermore, the signal processing unit includes an amplifier, a bandpass filter, and an analog-to-digital converter connected in sequence.

[0010] Furthermore, it also includes a communication unit, which is electrically connected to the signal processing unit and is used to transmit monitoring data to a remote monitoring center.

[0011] The beneficial effects achieved by the present invention using the above structure are as follows:

[0012] 1. The high-frequency electromagnetic wave monitoring sensor and partial discharge monitoring device proposed in this solution, through a special capacitor structure design, the capacitor structure formed by the overcurrent component, dielectric substrate and electromagnetic coupling plate has good response characteristics to high-frequency electromagnetic wave signals, can accurately detect weak high-frequency electromagnetic wave signals, and improve the sensitivity of partial discharge monitoring.

[0013] 2. The high-frequency electromagnetic wave monitoring sensor and partial discharge monitoring device proposed in this solution use a dielectric substrate with high dielectric constant and low loss characteristics and a highly conductive electromagnetic coupling plate to reduce loss and interference during signal transmission, ensure the accuracy of monitoring signals, and thus improve the accuracy of partial discharge monitoring.

[0014] 3. The high-frequency electromagnetic wave monitoring sensor and partial discharge monitoring device proposed in this solution, the signal processing unit in the partial discharge monitoring device processes the signal through amplifiers, bandpass filters and analog-to-digital converters, effectively filtering out noise and interference, enhancing the anti-interference capability of the device, and ensuring the reliability of the monitoring results.

[0015] 4. The high-frequency electromagnetic wave monitoring sensor and partial discharge monitoring device proposed in this solution have a simple structure. The high-frequency electromagnetic wave monitoring sensor only needs to be attached to the first surface of the dielectric substrate and the overcurrent component of the power system. There are no complicated installation steps, which is convenient and quick. It is suitable for partial discharge monitoring of various power equipment. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the high-frequency electromagnetic wave monitoring sensor of the present invention;

[0017] Figure 2 This is a system block diagram of the partial discharge monitoring device of the present invention.

[0018] Among them, 1 is a dielectric substrate, 101 is a first surface, 102 is a second surface, 2 is a current-carrying component, 3 is an electromagnetic coupling plate, and 4 is a signal output contact.

[0019] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0021] like Figure 1-2 As shown, the high-frequency electromagnetic wave monitoring sensor proposed in this invention includes a dielectric substrate 1, a current-carrying component 2, and an electromagnetic coupling plate 3. The dielectric substrate 1 has a first surface 101 and a second surface 102 facing each other. The first surface 101 is attached to the current-carrying component 2, which is used to connect to a power system. The second surface 102 is fixedly attached to the electromagnetic coupling plate 3. One side of the electromagnetic coupling plate 3 has a signal output contact 4. The current-carrying component 2, the dielectric substrate 1, and the electromagnetic coupling plate 3 form a capacitor structure with high-frequency response, so that when a high-frequency electromagnetic wave signal is generated on the current-carrying component 2 of the power system, a high-frequency induced signal is generated on the electromagnetic coupling plate 3. The dielectric substrate 1 is made of a material with high dielectric constant and low loss characteristics, and the electromagnetic coupling plate 3 is made of a highly conductive metal material.

[0022] The partial discharge monitoring device includes a high-frequency electromagnetic wave monitoring sensor, as well as a signal processing unit, a data storage unit, and an alarm unit. The signal processing unit is electrically connected to the signal output contact 4 of the high-frequency electromagnetic wave monitoring sensor and is used to amplify, filter, and perform analog-to-digital conversion on the high-frequency induced signal output by the sensor. The data storage unit is electrically connected to the signal processing unit and is used to store the processed signal data. The alarm unit is electrically connected to the signal processing unit and issues an alarm signal when the signal detected by the signal processing unit exceeds a preset threshold. The signal processing unit includes an amplifier, a bandpass filter, and an analog-to-digital converter connected in sequence. It also includes a communication unit, which is electrically connected to the signal processing unit and is used to transmit the monitoring data to a remote monitoring center.

[0023] In practical applications, a suitable dielectric substrate 1 material, such as polytetrafluoroethylene (PTFE), is selected and processed into a dielectric substrate 1 with a first surface 101 and a second surface 102 according to the design dimensions. An electromagnetic coupling plate 3 is made of highly conductive copper and fixedly attached to the second surface 102 of the dielectric substrate 1. A signal output contact 4 is provided on one side of the electromagnetic coupling plate 3. During installation, the first surface 101 of the dielectric substrate 1 is tightly attached to the overcurrent component 2 of the power system to ensure good contact between the sensor and the overcurrent component 2.

[0024] Connect the signal output contact 4 of the fabricated high-frequency electromagnetic wave monitoring sensor to the input terminal of the amplifier in the signal processing unit. Then, connect the amplifier output to the input terminal of the bandpass filter, and the bandpass filter output to the input terminal of the analog-to-digital converter (ADC). Finally, connect the ADC output to the data storage unit, alarm unit, and communication unit. During debugging, by inputting a standard high-frequency electromagnetic wave signal, adjust parameters such as the amplifier's amplification factor and the bandpass filter's passband frequency to ensure the signal processing unit can accurately process the high-frequency induced signal. Simultaneously, set the alarm threshold for the alarm unit to ensure that an alarm signal is issued promptly when the detected signal exceeds the threshold.

[0025] The partial discharge monitoring device of this invention is applied to the partial discharge monitoring of high-voltage switchgear. A high-frequency electromagnetic wave monitoring sensor is installed on the busbar or other over-current components 2 inside the high-voltage switchgear to monitor the high-frequency electromagnetic wave signals generated during the operation of the switchgear in real time. The signal processing unit processes the signal output from the sensor, and the data storage unit stores the processed signal data. Personnel can transmit the data to a remote monitoring center via the communication unit to understand the real-time operating status of the high-voltage switchgear. When the alarm unit detects a signal exceeding a threshold, it immediately issues an alarm signal, reminding personnel to conduct timely inspection and maintenance to prevent the high-voltage switchgear from malfunctioning due to partial discharge.

[0026] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the invention, such designs should fall within the protection scope of the present invention.

Claims

1. A high-frequency electromagnetic wave monitoring sensor, characterized in that, The device includes a dielectric substrate, a current-carrying component, and an electromagnetic coupling plate. The dielectric substrate has opposing first and second surfaces. The first surface is attached to the current-carrying component, which is used to connect to a power system. The second surface is fixedly attached to the electromagnetic coupling plate. One side of the electromagnetic coupling plate has a signal output contact. The current-carrying component, the dielectric substrate, and the electromagnetic coupling plate form a capacitor structure with a high-frequency response, such that when a high-frequency electromagnetic wave signal is generated on the current-carrying component of the power system, a high-frequency induced signal is generated on the electromagnetic coupling plate.

2. The high-frequency electromagnetic wave monitoring sensor according to claim 1, characterized in that: The dielectric substrate is made of a material with high dielectric constant and low loss characteristics.

3. The high-frequency electromagnetic wave monitoring sensor according to claim 1, characterized in that: The electromagnetic coupling plate is made of a highly conductive metal material.

4. A partial discharge monitoring device, characterized in that, Includes the high-frequency electromagnetic wave monitoring sensor as described in any one of claims 1-3, as well as a signal processing unit, a data storage unit, and an alarm unit: The signal processing unit is electrically connected to the signal output contact of the high-frequency electromagnetic wave monitoring sensor and is used to amplify, filter, and perform analog-to-digital conversion on the high-frequency sensing signal output by the sensor. The data storage unit is electrically connected to the signal processing unit and is used to store the processed signal data; The alarm unit is electrically connected to the signal processing unit. When the signal detected by the signal processing unit exceeds a preset threshold, the alarm unit issues an alarm signal.

5. A partial discharge monitoring device according to claim 4, characterized in that: The signal processing unit includes an amplifier, a bandpass filter, and an analog-to-digital converter connected in sequence.

6. A partial discharge monitoring device according to claim 5, characterized in that: It also includes a communication unit, which is electrically connected to the signal processing unit and is used to transmit monitoring data to a remote monitoring center.

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