An electromagnetic triggered discharge optical signal sensing device

Abstract

The application provides an electromagnetic triggered discharge light signal sensing device, which comprises a directional high-frequency electromagnetic coupling module for receiving external corona discharge radiation electromagnetic waves and generating electromagnetic pulse signals; an electromagnetic signal triggering module for receiving the electromagnetic pulse signals generated by the directional high-frequency electromagnetic coupling module, generating a first bias voltage signal when the size of the electromagnetic pulse signals exceeds a first preset threshold; a light cone module for receiving discharge light signals within a preset range and generating photon signals, generating a second bias voltage signal when the size of the photon signals exceeds a second preset threshold; and a Geiger avalanche diode module for receiving the first bias voltage signal and the second bias voltage signal and responding to the first bias voltage signal and the second bias voltage signal respectively. The application solves the problems of low sensitivity and small light flux in the prior art for abnormal corona ultraviolet optical detection.

Description

Technical Field

[0001] This invention relates to the field of power system detection technology, and in particular to an electromagnetically triggered discharge optical signal sensing device. Background Technology

[0002] With the continuous increase in my country's electricity demand, especially in the application of ultra-high voltage direct current (UHVDC) transmission and transformation systems, ensuring the safe and reliable operation of the power system is of paramount importance. Factors such as electric arcs, corona discharges, and partial discharges can damage high-voltage equipment and even lead to power system failures.

[0003] Just as corona discharges occurring on high-voltage transmission lines not only cause energy loss but also interfere with broadcast television signals, aerial detection of corona activity on transmission lines, especially long-distance transmission lines, contributes to the safety of lines and power transmission and transformation equipment. However, corona discharges can seriously endanger personal safety; therefore, timely and accurate detection of the location and intensity of corona discharges is crucial for ensuring the reliable operation of the power system, reducing equipment damage, and guaranteeing personal safety. Furthermore, successful early detection and warning can save power companies tens of millions of yuan, making the detection of corona generated by overhead transmission lines and power transformation equipment extremely valuable commercially.

[0004] Abnormal corona detection in power lines is an effective method for detecting external insulation defects. Abnormal corona caused by external insulation defects is often accompanied by electromagnetic and optical radiation. Optical detection, with its good anti-interference capabilities and high sensitivity, has high application prospects in online monitoring of abnormal corona in power lines. Generally, optical measurement methods use optical sensors to receive light pulse signals emitted by the discharge fault source to determine the defect status. Ultraviolet filtering can be used to avoid the influence of sunlight on the measurement results, but this reduces the sensitivity of optical detection and sacrifices the discharge spectral components in the ultraviolet band. Therefore, in practical applications, its defect detection capability is limited and its sensitivity is not high. Summary of the Invention

[0005] This application provides an electromagnetically triggered discharge optical signal sensing device to solve the problems of low sensitivity and low light flux in the existing technology for abnormal corona ultraviolet optical detection.

[0006] The sensing device includes:

[0007] A directional high-frequency electromagnetic coupling module is configured to receive electromagnetic waves radiated by external corona discharge and thereby generate electromagnetic pulse signals.

[0008] An electromagnetic signal triggering module is connected to the directional high-frequency electromagnetic coupling module; the electromagnetic signal triggering module is configured to receive the electromagnetic pulse signal generated by the directional high-frequency electromagnetic coupling module, and generate a first bias voltage signal when the magnitude of the electromagnetic pulse signal exceeds a first preset threshold.

[0009] The light cone module is configured to receive a discharge light signal within a preset range and thereby generate a photon signal. When the magnitude of the photon signal exceeds a second preset threshold, a second bias voltage signal is generated.

[0010] A Geiger avalanche diode module is provided, which is connected to the electromagnetic signal triggering module and the optical cone module respectively. The Geiger avalanche diode module is configured to receive the first bias voltage signal and the second bias voltage signal, and respond according to the first bias voltage signal and the second bias voltage signal respectively.

[0011] Preferably, the directional high-frequency electromagnetic coupling module includes:

[0012] Antenna substrate;

[0013] A radio frequency (RF) directional antenna is printed on one side of the antenna substrate; the RF directional antenna is configured to directionally receive external corona discharge radiated electromagnetic waves and thereby generate the electromagnetic pulse signal.

[0014] Preferably, the directional high-frequency electromagnetic coupling module further includes:

[0015] A shielded connecting line is connected to the side of the antenna substrate away from the radio frequency directional antenna; the shielded connecting line is configured to transmit the electromagnetic pulse signal to the electromagnetic signal triggering module.

[0016] Preferably, the antenna substrate is made of polytetrafluoroethylene material, and the wave impedance of the shielding connection wire is 75 ohms.

[0017] Preferably, the radio frequency directional antenna includes:

[0018] The first configuration, the second configuration, and the third configuration are three rectangular structures of different lengths. The first configuration, the second configuration, and the third configuration are connected sequentially from bottom to top, and the lengths of the first configuration, the second configuration, and the third configuration decrease from bottom to top.

[0019] The fourth configuration is a rectangle with a semicircle of equal diameter to the length of the rectangle cut off at the middle position. The fourth configuration is connected to the third configuration.

[0020] The fifth configuration is a circular structure, and the fifth configuration is connected to the fourth configuration.

[0021] Preferably, one side of the antenna substrate is a printed copper electrode, and the impedance of the printed copper electrode is 75 ohms;

[0022] The first matching resistor of the printed copper electrode is connected in parallel with the coaxial terminal of the shielding connection line.

[0023] Preferably, the electromagnetic signal triggering module is further configured to:

[0024] When the magnitude of the electromagnetic pulse signal exceeds a first preset threshold, a first bias voltage signal is generated to enable the Geiger avalanche diode module to receive external pulse signals, and the first bias voltage signal is sent to the Geiger avalanche diode module.

[0025] When the function of receiving external pulse signals is enabled in the Geiger avalanche diode module, the electromagnetic pulse signal is sent to the Geiger avalanche diode module.

[0026] Preferably, the directional high-frequency electromagnetic coupling module is disposed on the optical cone module;

[0027] The light cone module is also configured to:

[0028] When the Geiger avalanche diode module receives external pulse signals, it sends the photon signal to the Geiger avalanche diode module.

[0029] Preferably, the sensing device includes:

[0030] An optical pulse detection and acquisition module is provided, which is connected to the Geiger avalanche diode module. The optical pulse detection and acquisition module is configured to detect and down-convert the photon signal to obtain a detected signal, and to digitally acquire the detected signal.

[0031] Preferably, the Geiger avalanche diode module is further configured to:

[0032] Receive the first bias voltage signal and enable the function of receiving external pulse signals;

[0033] The electromagnetic pulse signal is received, converted into a current signal, and the current signal is detected.

[0034] When the second bias voltage signal is received, the photon signal sent by the optical cone module is received, the photon signal is converted into a photocurrent signal, and the photocurrent signal is sent to the optical pulse detection and acquisition module.

[0035] The optical pulse detection and acquisition module is also configured to detect and down-convert the photocurrent signal to obtain a detection signal.

[0036] This application provides an electromagnetically triggered discharge optical signal sensing device, comprising: a directional high-frequency electromagnetic coupling module configured to receive external corona discharge radiated electromagnetic waves and thereby generate an electromagnetic pulse signal; an electromagnetic signal triggering module connected to the directional high-frequency electromagnetic coupling module, configured to receive the electromagnetic pulse signal generated by the directional high-frequency electromagnetic coupling module, and generate a first bias voltage signal when the magnitude of the electromagnetic pulse signal exceeds a first preset threshold; a light cone module configured to receive discharge optical signals within a preset range and thereby generate photon signals, and generate a second bias voltage signal when the magnitude of the photon signal exceeds a second preset threshold; and a Geiger avalanche diode module connected to both the electromagnetic signal triggering module and the light cone module, configured to receive the first bias voltage signal and the second bias voltage signal, and respond according to the first bias voltage signal and the second bias voltage signal respectively. This application solves the problems of low sensitivity and low light flux in the prior art for abnormal corona ultraviolet optical detection by the above-mentioned sensing device. Attached Figure Description

[0037] To more clearly illustrate the technical solution of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0038] Figure 1 This is a schematic diagram of an electromagnetically triggered discharge optical signal sensing device according to this application;

[0039] Figure 2 This is a schematic diagram of the installation of the radio frequency directional antenna and the light cone module in an electromagnetically triggered discharge optical signal sensing device according to this application.

[0040] Figure 3 This is a schematic diagram of the signal receiving range of the light cone and antenna in an electromagnetically triggered discharge optical signal sensing device according to this application. Detailed Implementation

[0041] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0042] Figure 1 This is a schematic diagram of an electromagnetically triggered discharge optical signal sensing device according to this application.

[0043] Figure 3 This is a schematic diagram of the signal receiving range of the light cone and antenna in an electromagnetically triggered discharge optical signal sensing device according to this application.

[0044] See Figure 1 and Figure 3 As can be seen, this embodiment provides an electromagnetically triggered discharge optical signal sensing device, the sensing device comprising:

[0045] A directional high-frequency electromagnetic coupling module 100 is configured to receive electromagnetic waves radiated by external corona discharge and generate electromagnetic pulse signals accordingly. Specifically, in this embodiment, the directional high-frequency electromagnetic coupling module 100 is used to receive electromagnetic waves radiated by external corona discharge and generate electromagnetic pulse signals based on the radiated electromagnetic waves.

[0046] The directional high-frequency electromagnetic coupling module 100 includes an antenna substrate 110 and a radio frequency directional antenna 120, which is printed on one side of the antenna substrate 110. The radio frequency directional antenna 120 is configured to directionally receive external corona discharge radiated electromagnetic waves and thereby generate the electromagnetic pulse signal. Specifically, in this embodiment, the radio frequency directional antenna 120 for directionally receiving external corona discharge radiated electromagnetic waves is fixed by the antenna substrate 110. The radio frequency directional antenna 120 is also used to generate the electromagnetic pulse signal based on the radiated electromagnetic waves.

[0047] Figure 2 This is a schematic diagram of the installation of the radio frequency directional antenna and the light cone module in an electromagnetically triggered discharge optical signal sensing device according to this application.

[0048] See Figure 2 It can be seen that the radio frequency directional antenna 120 includes:

[0049] The first configuration 121, the second configuration 122, and the third configuration 123 are three rectangular structures of different lengths. The first configuration 121, the second configuration 122, and the third configuration 123 are connected sequentially from bottom to top, and the lengths of the first configuration 121, the second configuration 122, and the third configuration 123 decrease from bottom to top.

[0050] The fourth configuration 124 is a rectangle with a semicircle of equal diameter to the length of the rectangle cut off at the middle position. The fourth configuration 124 is connected to the third configuration 123.

[0051] The fifth configuration 125 is a circular structure and is connected to the fourth configuration 124.

[0052] Specifically, in this embodiment, the framework between the first configuration 121, the second configuration 122, the third configuration 123, the fourth configuration 124 and the fifth configuration 125 greatly improves the ability of the radio frequency directional antenna 120 to receive external corona discharge radiated electromagnetic waves.

[0053] The sensing device further includes:

[0054] An electromagnetic signal triggering module 200 is connected to the directional high-frequency electromagnetic coupling module 100. The electromagnetic signal triggering module 200 is configured to receive the electromagnetic pulse signal generated by the directional high-frequency electromagnetic coupling module 100. When the magnitude of the electromagnetic pulse signal exceeds a first preset threshold, a first bias voltage signal is generated. Specifically, in this embodiment, the electromagnetic signal triggering module 200 is used to receive the electromagnetic pulse signal generated by the directional high-frequency electromagnetic coupling module 100. When the magnitude of the electromagnetic pulse signal exceeds the first preset threshold, a first bias voltage signal is generated, that is, when the electromagnetic pulse signal accumulates to a certain value, a first bias voltage signal is generated, and this triggers the Geiger avalanche diode module 400.

[0055] The directional high-frequency electromagnetic coupling module 100 further includes a shielded connection line 130, which is connected to the side of the antenna substrate 110 away from the radio frequency directional antenna 120. The shielded connection line 130 is configured to transmit the electromagnetic pulse signal to the electromagnetic signal triggering module 200. Specifically, in this embodiment, the directional high-frequency electromagnetic coupling module 100 and the electromagnetic signal triggering module 200 are connected through the shielded connection line 130.

[0056] The antenna substrate 110 is made of polytetrafluoroethylene, and the wave impedance of the shielded connection line 130 is 75 ohms.

[0057] One side of the antenna substrate 110 is a printed copper electrode, and the impedance of the printed copper electrode is 75 ohms.

[0058] The first matching resistor of the printed copper electrode is connected in parallel with the coaxial terminal of the shielded connection line 130.

[0059] Furthermore, in some embodiments, the electromagnetic signal triggering module 200 is also configured to generate a first bias voltage signal for enabling the Geiger avalanche diode module 400 to receive external pulse signals when the magnitude of the electromagnetic pulse signal exceeds a first preset threshold, and to send the first bias voltage signal to the Geiger avalanche diode module 400; when the Geiger avalanche diode module 400's function of receiving external pulse signals is enabled, the electromagnetic pulse signal is sent to the Geiger avalanche diode module 400. Specifically, in this embodiment, the first bias voltage signal generated by the electromagnetic signal triggering module 200 triggers the signal receiving function of the Geiger avalanche diode module 400.

[0060] The sensing device further includes:

[0061] A light cone module 300 is configured to receive discharge light signals within a preset range and generate photon signals accordingly. When the magnitude of the photon signal exceeds a second preset threshold, a second bias voltage signal is generated. Specifically, in this embodiment, the light cone module 300 is used to receive discharge light signals within a preset range and generate photon signals based on the discharge light signals. When the photon signals accumulate to a certain level, the second bias voltage signal is generated.

[0062] The light cone module 300 is further configured to send the photon signal to the Geiger avalanche diode module 400 when the function of receiving external pulse signals is enabled, thereby enabling the Geiger avalanche diode module 400 to sense optical and electrical signals.

[0063] Among them, see Figure 2 It is also known that the directional high-frequency electromagnetic coupling module 100 is disposed on the light cone module 300, specifically in Figure 2 This is manifested in the fact that the radio frequency directional antenna 120 is mounted on the light cone module 300.

[0064] The sensing device further includes:

[0065] A Geiger avalanche diode module 400 is connected to the electromagnetic signal triggering module 200 and the optical cone module 300, respectively. The Geiger avalanche diode module 400 is configured to receive a first bias voltage signal and a second bias voltage signal, and respond according to the first bias voltage signal and the second bias voltage signal, respectively. Specifically, in this embodiment, after receiving the first bias voltage signal, the Geiger avalanche diode module 400 activates its function of receiving external pulse signals, receives the electromagnetic pulse signal, converts the electromagnetic pulse signal into a current signal, and detects the current signal. When the second bias voltage signal is received, it receives the photon signal sent by the optical cone module 300 and converts the photon signal into a photocurrent signal.

[0066] The sensing device further includes an optical pulse detection and acquisition module 500 for detecting and down-converting the photon signal to obtain the detected signal.

[0067] This embodiment has the following advantages:

[0068] This study addresses the problems of low sensitivity and low luminous flux in existing abnormal corona ultraviolet optical detection. A hardware configuration combining a directional high-frequency electromagnetic coupling module 100 and a high-sensitivity optical sensor was designed, presenting a novel electromagnetically triggered optical measurement principle that can serve as an alternative to solar-blind ultraviolet detection.

Claims

1. An electromagnetically triggered discharge optical signal sensing device, characterized in that, The sensing device includes: A directional high-frequency electromagnetic coupling module (100) is configured to receive external corona discharge radiated electromagnetic waves and thereby generate electromagnetic pulse signals. An electromagnetic signal triggering module (200) is connected to the directional high-frequency electromagnetic coupling module (100); the electromagnetic signal triggering module (200) is configured to receive the electromagnetic pulse signal generated by the directional high-frequency electromagnetic coupling module (100), and generate a first bias voltage signal when the magnitude of the electromagnetic pulse signal exceeds a first preset threshold. The light cone module (300) is configured to receive a discharge light signal within a preset range and thereby generate a photon signal. When the magnitude of the photon signal exceeds a second preset threshold, a second bias voltage signal is generated. A Geiger avalanche diode module (400) is connected to the electromagnetic signal trigger module (200) and the light cone module (300) respectively; the Geiger avalanche diode module (400) is configured to receive the first bias voltage signal and the second bias voltage signal, and respond according to the first bias voltage signal and the second bias voltage signal respectively; The electromagnetic signal triggering module (200) is also configured to: When the magnitude of the electromagnetic pulse signal exceeds a first preset threshold, a first bias voltage signal is generated to enable the Geiger avalanche diode module (400) to receive external pulse signals, and the first bias voltage signal is sent to the Geiger avalanche diode module (400). When the function of receiving external pulse signals is enabled in the Geiger avalanche diode module (400), the electromagnetic pulse signal is sent to the Geiger avalanche diode module (400). The directional high-frequency electromagnetic coupling module (100) is disposed on the optical cone module (300); The light cone module (300) is also configured to: When the Geiger avalanche diode module (400) is enabled to receive external pulse signals, the photon signal is sent to the Geiger avalanche diode module (400).

2. The electromagnetically triggered discharge optical signal sensing device according to claim 1, characterized in that, The directional high-frequency electromagnetic coupling module (100) includes: Antenna substrate (110); A radio frequency directional antenna (120) is printed on one side of the antenna substrate (110); the radio frequency directional antenna (120) is configured to directionally receive external corona discharge radiated electromagnetic waves and thereby generate the electromagnetic pulse signal.

3. The electromagnetically triggered discharge optical signal sensing device according to claim 2, characterized in that, The directional high-frequency electromagnetic coupling module (100) also includes: A shielded connecting line (130) is connected to the side of the antenna substrate (110) away from the radio frequency directional antenna (120); the shielded connecting line (130) is configured to transmit the electromagnetic pulse signal to the electromagnetic signal triggering module (200).

4. The electromagnetically triggered discharge optical signal sensing device according to claim 3, characterized in that, The antenna substrate (110) is made of polytetrafluoroethylene material, and the wave impedance of the shielded connection line (130) is 75 ohms.

5. The electromagnetically triggered discharge optical signal sensing device according to claim 4, characterized in that, The radio frequency directional antenna (120) includes: The first configuration (121), the second configuration (122), and the third configuration (123) are three rectangular structures of different lengths. The first configuration (121), the second configuration (122), and the third configuration (123) are connected sequentially from bottom to top, and the lengths of the first configuration (121), the second configuration (122), and the third configuration (123) decrease from bottom to top. The fourth configuration (124) is a rectangle with a semicircle of equal diameter to the length of the rectangle cut off at the middle position. The fourth configuration (124) is connected to the third configuration (123). The fifth configuration (125) is a circular structure and is connected to the fourth configuration (124).

6. The electromagnetically triggered discharge optical signal sensing device according to claim 5, characterized in that, One side of the antenna substrate (110) is a printed copper electrode, and the impedance of the printed copper electrode is 75 ohms. The first matching resistor of the printed copper electrode is connected in parallel with the coaxial terminal of the shielded connection line (130).

7. The electromagnetically triggered discharge optical signal sensing device according to claim 1, characterized in that, The sensing device includes: An optical pulse detection and acquisition module (500) is connected to the Geiger avalanche diode module (400); the optical pulse detection and acquisition module (500) is configured to detect and down-convert the photon signal to obtain a detected signal, and to digitally acquire the detected signal.

8. The electromagnetically triggered discharge optical signal sensing device according to claim 7, characterized in that, The Geiger avalanche diode module (400) is also configured to: Receive the first bias voltage signal and enable the function of receiving external pulse signals; The electromagnetic pulse signal is received, converted into a current signal, and the current signal is detected. When the second bias voltage signal is received, the photon signal sent by the optical cone module (300) is received, the photon signal is converted into a photocurrent signal, and the photocurrent signal is sent to the optical pulse detection and acquisition module (500). The optical pulse detection and acquisition module (500) is also configured to detect and down-convert the photon signal to obtain a detection signal.

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