Enclosed electrical equipment detection system

Abstract

The invention provides a closed electrical equipment detection system. The closed electrical equipment detection system comprises a microwave emitter outside closed electrical equipment and detection equipment in the closed electrical equipment, the microwave transmitter is used for transmitting electromagnetic waves, and the rectification antenna in the detection equipment is used for receiving the electromagnetic waves, converting the electromagnetic waves into direct current and supplying power to the controller, the electroscope, the temperature and humidity sensor, the pressure sensor and the partial discharge detector in the detection equipment. And the controller is used for generating a detection report according to real-time signals transmitted by the electroscope, the temperature and humidity sensor, the pressure sensor and the partial discharge detector. According to the scheme, the closed electrical equipment detection system is formed by the microwave emitter outside the closed electrical equipment and the detection equipment in the closed electrical equipment, so that the closed electrical equipment is detected.

Description

Technical Field

[0001] The present application relates to the field of power grid technology, and in particular to a closed electrical equipment detection system. Background Art

[0002] With the continuous development of science and technology, various electrical equipment have emerged. Among them, there are some enclosed electrical equipment filled with insulating gas, which can effectively improve the insulation strength and arc extinguishing ability, such as high-voltage switchgear, gas-insulated switchgear, inflatable ring network cabinet, inflatable circuit breaker, etc.

[0003] In order to ensure the safety of enclosed electrical equipment, it is necessary to detect it to determine whether the enclosed electrical equipment is abnormal. However, since the electrical equipment is enclosed, there is no device or method in the prior art that can detect it.

[0004] Therefore, there is an urgent need for a closed electrical equipment detection system that can detect closed electrical equipment. Summary of the Invention

[0005] The enclosed electrical equipment detection system provided in the embodiments of the present application is used to solve the problem in the prior art that enclosed electrical equipment cannot be detected.

[0006] In a first aspect, an embodiment of the present application provides a closed electrical equipment detection system, comprising:

[0007] Microwave transmitters outside enclosed electrical equipment, and detection equipment inside enclosed electrical equipment;

[0008] The detection device includes a rectenna, and a controller, an electroscope, a temperature and humidity sensor, a pressure sensor, and a partial discharge detector respectively connected to the rectenna;

[0009] The controller is respectively connected to the electroscope, the temperature and humidity sensor, the pressure sensor and the partial discharge detector;

[0010] The microwave transmitter is used to transmit electromagnetic waves;

[0011] The rectenna is used to receive the electromagnetic waves and convert the electromagnetic waves into direct current, and to supply power to the controller, the electroscope, the temperature and humidity sensor, the pressure sensor, and the partial discharge detector;

[0012] The controller is used to generate a detection report according to the real-time signals transmitted by the electroscope, the temperature and humidity sensor, the pressure sensor and the partial discharge detector.

[0013] In one possible embodiment, the real-time signal transmitted by the electroscope is a charged signal or a non-charged signal, the real-time signals transmitted by the temperature and humidity sensor are temperature and humidity, the real-time signal transmitted by the pressure sensor is insulating gas pressure, and the real-time signal transmitted by the partial discharge detector is a discharge signal or a non-discharge signal.

[0014] In one possible implementation, when the controller is configured to generate a detection report based on the real-time signals transmitted by the electroscope, the temperature and humidity sensor, the pressure sensor, and the partial discharge detector, it is specifically configured to:

[0015] Determine the corresponding gas safety pressure range according to the temperature and humidity transmitted by the temperature and humidity sensor;

[0016] generating a first detection result indicating whether gas is leaking according to the gas safety pressure range and the insulating gas pressure transmitted by the pressure sensor;

[0017] generating, based on the real-time signal transmitted by the partial discharge detector, a second detection result indicating whether the enclosed electrical equipment has partial discharge;

[0018] generating a third detection result indicating whether the enclosed electrical device is energized according to the real-time signal transmitted by the electroscope;

[0019] The test report is generated according to the first test result, the second test result and the third test result.

[0020] In a possible implementation, the detection device further includes an alarm device;

[0021] The alarm device is connected to the rectenna and the controller respectively;

[0022] The controller is further configured to control the alarm device to sound an alarm when it is determined that the first detection result indicates a gas leak, or the second detection result indicates a partial discharge of the enclosed electrical equipment, or the third detection result indicates that the enclosed electrical equipment is energized.

[0023] In one possible implementation, the controller is further configured to:

[0024] determining whether there is abnormal gas pressure change in the enclosed electrical equipment based on historical temperature, historical humidity, historical insulating gas pressure, the insulating gas pressure transmitted by the pressure sensor, and the temperature and humidity transmitted by the temperature and humidity sensor;

[0025] If it is determined that the gas pressure change of the closed electrical equipment is abnormal, the alarm device is controlled to issue an alarm.

[0026] In one possible implementation, when the controller is used to determine whether there is an abnormal gas pressure change in the enclosed electrical equipment based on historical temperature, historical humidity, historical insulating gas pressure, the insulating gas pressure transmitted by the pressure sensor, and the temperature and humidity transmitted by the temperature and humidity sensor, it is specifically used to:

[0027] Determining a corresponding gas change safety range based on the historical temperature, the historical humidity, and the temperature and humidity transmitted by the temperature and humidity sensor;

[0028] taking the difference between the historical insulating gas pressure and the insulating gas pressure transmitted by the pressure sensor as the pressure difference to be detected;

[0029] If the pressure difference to be detected does not fall within the gas change safety range, it is determined that the closed electrical equipment has an abnormal gas pressure change;

[0030] If the pressure difference to be detected falls within the gas change safety range, it is determined that there is no abnormal gas pressure change in the closed electrical equipment.

[0031] In a possible implementation, the detection device further includes a first communication unit;

[0032] The first communication unit is connected to the rectenna and the controller respectively;

[0033] The controller is further configured to report the detection report through the first communication unit.

[0034] In a possible implementation, the microwave transmitter includes a processor, and a second communication unit and a display screen connected to the processor;

[0035] The controller is further configured to send the real-time signals transmitted by the electroscope, the temperature and humidity sensor, the pressure sensor, and the partial discharge detector to the second communication unit via the first communication unit;

[0036] The processor is configured to display the real-time signals transmitted by the electroscope, the temperature and humidity sensor, the pressure sensor, and the partial discharge detector and received by the second communication unit through the display screen.

[0037] In a possible implementation, the electroscope includes a first resistor, a second resistor, a third resistor, a fourth resistor, a voltage stabilizing diode, an NPN transistor, a PNP transistor, a first light emitting diode, and a second light emitting diode;

[0038] The first end of the second resistor is respectively connected to the second end of the first resistor and the cathode of the Zener diode, the second end of the second resistor is respectively connected to the anode of the first light-emitting diode, the first end of the third resistor and the positive output end of the rectifier antenna, the first end of the first resistor is in contact with the conductor inside the enclosed electrical device, the second end of the third resistor is connected to the anode of the second light-emitting diode, the cathode of the second light-emitting diode is grounded, the anode of the Zener diode is respectively connected to the first end of the fourth resistor and the base of the NPN transistor, the collector of the NPN transistor is connected to the base of the PNP transistor, the emitter of the PNP transistor is connected to the cathode of the first light-emitting diode, and the second end of the fourth resistor, the emitter of the NPN transistor and the collector of the PNP transistor are grounded;

[0039] The emitter of the PNP transistor is connected to the controller.

[0040] In a possible implementation, the partial discharge detector is an ultrasonic sensor or a UHF sensor.

[0041] The closed electrical equipment detection system provided in the embodiment of the present application includes a microwave transmitter outside the closed electrical equipment and a detection device inside the closed electrical equipment; the detection device includes a rectenna, and a controller, an electroscope, a temperature and humidity sensor, a pressure sensor, and a partial discharge detector respectively connected to the rectenna; the controller is respectively connected to the electroscope, the temperature and humidity sensor, the pressure sensor, and the partial discharge detector. The microwave transmitter is used to transmit electromagnetic waves, and the rectenna is used to receive electromagnetic waves and convert them into direct current, as well as to power the controller, the electroscope, the temperature and humidity sensor, the pressure sensor, and the partial discharge detector. The controller is used to generate a detection report based on the real-time signals transmitted by the electroscope, the temperature and humidity sensor, the pressure sensor, and the partial discharge detector. This solution realizes the detection of closed electrical equipment through a closed electrical equipment detection system composed of a microwave transmitter outside the closed electrical equipment and a detection device inside the closed electrical equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0043] Figure 1 This is a schematic diagram of the application scenario of the closed electrical equipment detection system;

[0044] Figure 2 Schematic diagram of the structure of the closed electrical equipment detection system provided in this application Figure 1 ;

[0045] Figure 3 A schematic diagram of the process of generating a test report for the controller provided in this application;

[0046] Figure 4 Schematic diagram of the structure of the closed electrical equipment detection system provided in this application Figure 2 ;

[0047] Figure 5 Schematic diagram of the structure of the closed electrical equipment detection system provided in this application Figure 3 ;

[0048] Figure 6 A schematic diagram of a process for the controller provided in this application to detect enclosed electrical equipment based on historical data;

[0049] Figure 7 A schematic diagram of the structure of the electroscope provided for this application;

[0050] Figure 8 Schematic diagram of the contact between the electroscope and the conductor provided in this application.

[0051] The above drawings illustrate specific embodiments of the present application, which will be described in more detail below. These drawings and the textual description are not intended to limit the scope of the present application in any way, but rather to illustrate the concepts of the present application to those skilled in the art by reference to specific embodiments. DETAILED DESCRIPTION

[0052] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numerals in different figures represent identical or similar elements, unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.

[0053] The terms "first," "second," "third," "fourth," and so forth (if any) in the specification and claims of this application and in the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a particular order or sequential sequence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of the application described herein can be implemented in orders other than those illustrated or described herein. In addition, the terms "including" and "having," and any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus comprising a series of steps or elements is not necessarily limited to those steps or elements explicitly listed, but may include other steps or elements not explicitly listed or inherent to such process, method, product, or apparatus.

[0054] With the continuous development of science and technology, various electrical equipment have emerged. Among them, there are some closed electrical equipment filled with insulating gas, which can effectively improve the insulation strength and arc extinguishing ability, such as gas insulated switchgear, inflatable ring network cabinets, inflatable circuit breakers, etc.

[0055] To ensure the safety of enclosed electrical equipment, it is necessary to inspect it to determine whether it is abnormal. However, since electrical equipment is enclosed, there are no devices or methods in the prior art that can detect it. Therefore, there is an urgent need for a closed electrical equipment inspection system that can detect enclosed electrical equipment.

[0056] To address the problems existing in the prior art, the inventors discovered during their research on a closed electrical equipment detection system that, to enable detection of closed electrical equipment, the detection equipment can be installed inside the equipment. Furthermore, to avoid battery power problems such as the need for battery replacement and battery degradation, a microwave transmitter can be installed outside the equipment. The detection equipment includes a rectenna, as well as a controller, an electroscope, a temperature and humidity sensor, a pressure sensor, and a partial discharge detector, each connected to the rectenna. The microwave transmitter transmits electromagnetic waves, while the rectenna in the detection equipment receives and converts the electromagnetic waves into direct current (DC) and powers the controller, electroscope, temperature and humidity sensor, pressure sensor, and partial discharge detector in the detection equipment. The controller generates a detection report based on the real-time signals transmitted by the electroscope, temperature and humidity sensor, pressure sensor, and partial discharge detector. The detection equipment and microwave transmitter constitute the closed electrical equipment detection system. Based on the aforementioned inventive concepts, the closed electrical equipment detection system disclosed in this application was designed.

[0057] For example, Figure 1 This is a schematic diagram of the application scenario of the closed electrical equipment detection system, such as Figure 1 As shown, the application scenario may include: a detection device 101 , a microwave transmitter 102 and a closed electrical device 103 .

[0058] exist Figure 1 In the application scenario shown, the detection device 101 and the microwave transmitter 102 constitute a closed electrical equipment detection system, the microwave transmitter 102 is outside the closed electrical equipment, and the detection device 101 is inside the closed electrical equipment.

[0059] The microwave transmitter 102 is used to transmit electromagnetic waves, and the detection device 101 is used to convert the electromagnetic waves into electrical energy to power itself, thereby detecting the enclosed electrical equipment 103, generating a detection report, and reporting the detection report.

[0060] The technical solution of the present application is described in detail below through specific embodiments. It should be noted that the following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments.

[0061] The following describes a closed electrical equipment detection system through Example 1. For example, Figure 2 Schematic diagram of the structure of the closed electrical equipment detection system provided in this application Figure 1 ,like Figure 2 As shown, the closed electrical equipment detection system includes a microwave transmitter 201 outside the closed electrical equipment and a detection device 202 inside the closed electrical equipment.

[0062] The detection device 202 includes a rectenna 203 , and a controller 204 , a electroscope 205 , a temperature and humidity sensor 206 , a pressure sensor 207 , and a partial discharge detector 208 , which are respectively connected to the rectenna 203 .

[0063] The controller 204 is connected to the electroscope 205 , the temperature and humidity sensor 206 , the pressure sensor 207 and the partial discharge detector 208 , respectively.

[0064] It should be noted that the partial discharge detector 208 is an ultrasonic sensor or a UHF sensor.

[0065] It should be noted that detection device 202 may also include a printed circuit board, through which rectenna 203 is connected to controller 204, electroscope 205, temperature and humidity sensor 206, pressure sensor 207, and partial discharge detector 208. Controller 204 is connected to electroscope 205, temperature and humidity sensor 206, pressure sensor 207, and partial discharge detector 208 via the printed circuit board, thereby reducing the size of the detection device.

[0066] The microwave transmitter 201 is used to transmit electromagnetic waves; the rectenna 203 is used to receive electromagnetic waves and convert them into direct current, as well as to power the controller 204, the electroscope 205, the temperature and humidity sensor 206, the pressure sensor 207 and the partial discharge detector 208.

[0067] The rectenna 203 includes an antenna and a rectifying unit.

[0068] It should be noted that the direction in which the microwave transmitter 201 transmits electromagnetic waves may be different from the direction in which the rectenna 203 is directed relative to the microwave transmitter 201. Electromagnetic waves may be reflected inside the enclosed electrical device and may also be received by the antenna and converted into electrical energy.

[0069] It should be noted that a rectenna may be provided for each of the controller, the electroscope, the temperature and humidity sensor, the pressure sensor, and the partial discharge detector to be connected thereto and to provide power for them.

[0070] It should be noted that multiple detection devices can be set up in the closed electrical equipment, and the electromagnetic waves emitted by the microwave transmitter can be received by the rectifying antenna of each detection device.

[0071] The electroscope 205 , the temperature and humidity sensor 206 , the pressure sensor 207 , and the partial discharge detector 208 may transmit the obtained real-time signals to the controller 204 .

[0072] The controller 204 is used to generate a detection report based on the real-time signals transmitted by the electroscope 205 , the temperature and humidity sensor 206 , the pressure sensor 207 and the partial discharge detector 208 .

[0073] The electroscope 205 is in contact with the conductor inside the closed electrical equipment. The real-time signal transmitted by the electroscope 205 is a charged signal or a non-charged signal. The real-time signals transmitted by the temperature and humidity sensor 206 are temperature and humidity. The real-time signal transmitted by the pressure sensor 207 is the insulating gas pressure. The real-time signal transmitted by the partial discharge detector 208 is a discharge signal or a non-discharge signal.

[0074] Exemplarily, microwave emitter 201 utilizes a high-frequency microwave generator with an output frequency of 2.45 GHz and an output power of 5 W. Controller 204 utilizes an ARM Cortex-M4 processor with a main frequency of 80 MHz. The temperature and humidity sensor utilizes a digital thermometer with a humidity measurement range of 0-100% RH and a resolution of 0.1% RH; and a temperature measurement range of -20°C to 60°C with a resolution of 0.1°C. Pressure sensor 207 utilizes a capacitive pressure sensor with a measurement range of 0-10 MPa.

[0075] For example, Figure 3 The flowchart of the controller generating the test report provided by this application is as follows: Figure 3 As shown, the controller is used to perform the following steps:

[0076] S301: Determine the corresponding gas safety pressure range according to the temperature and humidity transmitted by the temperature and humidity sensor.

[0077] In this step, in order to detect whether the insulating gas in the enclosed electrical equipment is leaking, the controller 204 needs to determine the gas safety pressure range corresponding to the temperature and humidity transmitted by the temperature and humidity sensor 206 based on the corresponding relationship between the preset temperature, humidity and pressure ranges.

[0078] For example, when the temperature is 20 degrees Celsius and the humidity is 120 ppmV, the corresponding pressure range is 0.48-0.52 MPa. When the temperature is 30 degrees Celsius and the humidity is 500 ppmV, the corresponding pressure range is 0.5-0.54 MPa. When the temperature is 50 degrees Celsius and the humidity is 300 ppmV, the corresponding pressure range is 0.55-0.57 MPa. The embodiments of the present application do not limit the corresponding relationship between temperature, humidity and pressure range, and can be determined according to actual conditions.

[0079] S302: Generate a first detection result indicating whether gas is leaking according to a gas safety pressure range and the insulating gas pressure transmitted by the pressure sensor.

[0080] In this step, after obtaining the gas safety pressure range, the controller 204 generates a first detection result indicating whether the gas is leaking according to the gas safety pressure range and the insulating gas pressure transmitted by the pressure sensor 207 .

[0081] If the insulating gas pressure does not fall within the gas safety pressure range, a first detection result indicating a gas leakage is generated.

[0082] If the insulating gas pressure falls within the gas safety pressure range, a first detection result indicating that the gas has not leaked is generated.

[0083] S303: Generate a second detection result indicating whether the enclosed electrical equipment has partial discharge according to the real-time signal transmitted by the partial discharge detector.

[0084] In this step, after the controller 204 receives the real-time signal transmitted by the partial discharge detector 208 , it generates a second detection result indicating whether the enclosed electrical equipment has partial discharge according to the real-time signal.

[0085] If the real-time signal transmitted by the partial discharge detector 208 is a discharge signal, a second detection result indicating partial discharge of the enclosed electrical equipment is generated.

[0086] If the real-time signal transmitted by the partial discharge detector 208 is a no-discharge signal, a second detection result indicating that no partial discharge occurs in the enclosed electrical equipment is generated.

[0087] S304: Generate a third detection result indicating whether the enclosed electrical device is energized according to the real-time signal transmitted by the electroscope.

[0088] In this step, after the controller 204 receives the real-time signal transmitted by the electroscope 205 , it generates a third detection result indicating whether the enclosed electrical device is energized according to the real-time signal.

[0089] If the real-time signal transmitted by the electroscope 205 is a live signal, a third detection result indicating that the enclosed electrical device is live is generated.

[0090] If the real-time signal transmitted by the electroscope 205 is a de-energized signal, a third detection result indicating that the enclosed electrical device is de-energized is generated.

[0091] S305: Generate a test report based on the first test result, the second test result, and the third test result.

[0092] In this step, after obtaining the first detection result, the second detection result, and the third detection result, the controller 204 generates a detection report according to the first detection result, the second detection result, and the third detection result.

[0093] First, a blank report is generated, and then the first test result, the second test result and the third test result are filled into the blank report to obtain a test report.

[0094] It should be noted that the real-time signals transmitted by the electroscope 205 , the temperature and humidity sensor 206 , the pressure sensor 207 and the partial discharge detector 208 may also be entered into the test report.

[0095] For example, in Figure 2 On the basis of Figure 4 Schematic diagram of the structure of the closed electrical equipment detection system provided in this application Figure 2 ,like Figure 4 As shown, the detection device 202 further includes a first communication unit 209 .

[0096] The first communication unit 209 is connected to the rectenna 203 and the controller 204 respectively; the rectenna 203 supplies power to the first communication unit 209 .

[0097] The controller 204 is also configured to report detection reports via the first communication unit 209. The controller 204 can send these reports to a server or a staff member's terminal device via the first communication unit 209 to facilitate maintenance of the enclosed electrical equipment. Staff members can also use their terminal devices to send control instructions to the first communication unit 209, and the controller 204 operates accordingly.

[0098] The enclosed electrical equipment detection system provided in this embodiment includes a microwave transmitter outside the enclosed electrical equipment and a detection device inside the enclosed electrical equipment. The microwave transmitter is used to transmit electromagnetic waves, and the rectenna in the detection device is used to receive the electromagnetic waves and convert them into direct current, as well as to power the controller, electroscope, temperature and humidity sensor, pressure sensor, and partial discharge detector in the detection device. The controller is used to generate a detection report based on the real-time signals transmitted by the electroscope, temperature and humidity sensor, pressure sensor, and partial discharge detector. This solution achieves detection of enclosed electrical equipment through the enclosed electrical equipment detection system composed of a microwave transmitter outside the enclosed electrical equipment and a detection device inside the enclosed electrical equipment, with high operational convenience and high detection accuracy.

[0099] In addition, the detection equipment is powered by a microwave transmitter, eliminating the need for batteries. This avoids possible battery failure under extreme electric fields, reduces the risk of explosion, and reduces the weight and volume of the detection equipment.

[0100] Based on the above embodiment, the following describes the situation where the detection device also includes an alarm device through embodiment 2. For example, Figure 2 On the basis of Figure 5 Schematic diagram of the structure of the closed electrical equipment detection system provided in this application Figure 3 ,like Figure 5 As shown, the detection device 202 also includes an alarm device 210 .

[0101] The alarm device 210 is connected to the rectenna 203 and the controller 204 respectively; the rectenna 203 provides power for the alarm device 210 .

[0102] The controller 204 is further configured to control the alarm device 210 to generate an alarm when the first detection result indicates a gas leak, the second detection result indicates a partial discharge in the enclosed electrical equipment, or the third detection result indicates that the enclosed electrical equipment is energized, so that personnel are informed that the enclosed electrical equipment has an abnormality and requires maintenance.

[0103] It should be noted that in Figure 5 Based on the above, the detection device may further include a first communication unit. The first communication unit is connected to the rectenna and the controller respectively; the rectenna supplies power to the first communication unit. The controller is further configured to report the detection report via the first communication unit.

[0104] The closed electrical equipment detection system provided in this embodiment controls the alarm device to sound an alarm when it is determined that the first detection result indicates a gas leakage, or the second detection result indicates a partial discharge of the closed electrical equipment, or the third detection result indicates that the closed electrical equipment is energized. This allows staff to promptly discover abnormalities in the closed electrical equipment so that timely maintenance can be carried out, thereby improving the operating stability and safety of the closed electrical equipment.

[0105] Based on the above embodiment, the following describes the situation in which the controller further detects the enclosed electrical equipment based on historical data through the third embodiment. Figure 6 The controller provided in this application detects enclosed electrical equipment based on historical data, as shown in the following figure: Figure 6 As shown, the controller is used to perform the following steps:

[0106] S601: Determine whether there is abnormal gas pressure change in the enclosed electrical equipment based on historical temperature, historical humidity, historical insulating gas pressure, the insulating gas pressure transmitted by the pressure sensor, and the temperature and humidity transmitted by the temperature and humidity sensor.

[0107] Enclosed electrical equipment can be periodically inspected. During each inspection cycle, the controller acquires real-time signals from the electroscope, temperature and humidity sensors, pressure sensors, and partial discharge detectors. After obtaining a test report from the current inspection cycle, the real-time signals from the temperature and humidity sensors and pressure sensors from the previous inspection cycle can be used as historical data, including historical temperature, humidity, and insulating gas pressure, for further inspection.

[0108] It should be noted that the duration of the detection cycle can be one day, three days, one week, etc. The embodiment of the present application does not limit the duration of the detection cycle, and it can be determined according to actual conditions.

[0109] In this step, the controller determines whether there is abnormal gas pressure change in the enclosed electrical equipment based on historical temperature, historical humidity, historical insulating gas pressure, the insulating gas pressure transmitted by the pressure sensor, and the temperature and humidity transmitted by the temperature and humidity sensor.

[0110] Specifically, the corresponding gas change safety range is determined based on the historical temperature, historical humidity, and the temperature and humidity transmitted by the temperature and humidity sensor.

[0111] The gas change safety range corresponding to the historical temperature, historical humidity and the temperature and humidity transmitted by the temperature and humidity sensor can be determined based on the preset correspondence between the historical temperature, historical humidity, real-time temperature, real-time humidity and the gas change safety range.

[0112] Exemplarily, the historical temperature is 20 degrees Celsius, the historical humidity is 120ppmV, the real-time temperature is 22 degrees Celsius, the real-time humidity is 130ppmV, and the corresponding pressure range is -0.01~0MPa. The historical temperature is 21 degrees Celsius, the historical humidity is 110ppmV, the real-time temperature is 19 degrees Celsius, the real-time humidity is 100ppmV, and the corresponding pressure range is 0~0.01MPa. The historical temperature is 30 degrees Celsius, the historical humidity is 500ppmV, the real-time temperature is 35 degrees Celsius, the real-time humidity is 530ppmV, and the corresponding pressure range is 0~0.05MPa. The embodiment of the present application does not limit the correspondence between historical temperature, historical humidity, real-time temperature, real-time humidity and the safe range of gas changes, and can be determined according to actual conditions.

[0113] The difference between the historical insulating gas pressure and the insulating gas pressure transmitted by the pressure sensor is used as the pressure difference to be detected.

[0114] If the pressure difference to be detected does not fall within the safe range of gas changes, it is determined that the closed electrical equipment has abnormal gas pressure changes; if the pressure difference to be detected falls within the safe range of gas changes, it is determined that the closed electrical equipment does not have abnormal gas pressure changes.

[0115] S602: If it is determined that the gas pressure change of the enclosed electrical equipment is abnormal, the alarm device is controlled to issue an alarm.

[0116] In this step, if the controller determines that the gas pressure of the enclosed electrical equipment has an abnormal change, it controls the alarm device to sound an alarm so that the staff can inspect and repair the enclosed electrical equipment.

[0117] The controller can also generate a gas pressure change abnormality reminder message, and then send the gas pressure change abnormality reminder message to the server or the staff's terminal device through the first communication unit to facilitate maintenance of the enclosed electrical equipment.

[0118] The closed electrical equipment detection system provided in this embodiment detects closed electrical equipment through historical temperature, historical humidity, historical insulating gas pressure, insulating gas pressure transmitted by pressure sensors, and temperature and humidity transmitted by temperature and humidity sensors, thereby improving the operating stability and safety of the closed electrical equipment.

[0119] Based on the above embodiments, a fourth embodiment is provided below to illustrate a case where a microwave transmitter includes a processor, a second communication unit, and a display screen.

[0120] The microwave transmitter includes a microwave transmitting unit and a microwave transmitting board unit for transmitting electromagnetic waves. In addition, the microwave transmitter also includes a processor, a second communication unit connected to the processor, and a display screen.

[0121] The controller is further configured to send the real-time signals transmitted by the electroscope, the temperature and humidity sensor, the pressure sensor, and the partial discharge detector to the second communication unit via the first communication unit.

[0122] The processor is used for displaying the real-time signals transmitted by the electroscope, the temperature and humidity sensor, the pressure sensor and the partial discharge detector received by the second communication unit through the display screen.

[0123] Staff can obtain real-time signals transmitted by the electroscope, temperature and humidity sensor, pressure sensor and partial discharge detector through the display screen, so as to determine whether the detection equipment is working normally, thereby realizing self-inspection of the detection equipment, and allowing staff to determine whether to repair the enclosed electrical equipment.

[0124] The enclosed electrical equipment detection system provided in this embodiment, wherein the microwave transmitter includes a processor, a second communication unit and a display screen, can display real-time signals transmitted by the electroscope, temperature and humidity sensor, pressure sensor and partial discharge detector on the display screen, complete self-inspection of the detection equipment and improve the safety of the enclosed electrical equipment.

[0125] Based on the above embodiments, the structure of the electroscope is described below through embodiment 5.

[0126] For example, Figure 7 The schematic diagram of the electroscope provided for this application is as follows: Figure 7 As shown, the electrical appliance includes a first resistor 701 , a second resistor 702 , a third resistor 703 , a fourth resistor 704 , a voltage stabilizing diode 705 , an NPN transistor 706 , a PNP transistor 707 , a first light emitting diode 708 , and a second light emitting diode 709 .

[0127] The first end of the second resistor 702 is respectively connected to the second end of the first resistor 701 and the cathode of the Zener diode 705. The second end of the second resistor 702 is respectively connected to the anode of the first light-emitting diode 708, the first end of the third resistor 703, and the positive output end of the rectifier antenna. The first end of the first resistor 701 is in contact with the conductor inside the enclosed electrical device. The second end of the third resistor 703 is connected to the anode of the second light-emitting diode 709. The cathode of the second light-emitting diode 709 is grounded. The anode of the Zener diode 705 is respectively connected to the first end of the fourth resistor 704 and the base of the NPN transistor 706. The collector of the NPN transistor 706 is connected to the base of the PNP transistor 707. The emitter of the PNP transistor 707 is connected to the cathode of the first light-emitting diode 708. The second end of the fourth resistor 704, the emitter of the NPN transistor 706, and the collector of the PNP transistor 707 are grounded. The emitter of the PNP transistor 707 is connected to the controller.

[0128] The first end of the first resistor 701 contacts the conductor inside the enclosed electrical device, which means that the first end of the first resistor 701 is connected to the conductor contact end 710 , and the conductor contact end 710 contacts the conductor inside the enclosed electrical device.

[0129] The NPN transistor 706 , the PNP transistor 707 and the fourth resistor 704 may form a Darlington transistor.

[0130] A first end of the third resistor 703 is connected to the positive output end of the rectenna, a second end of the third resistor 703 is connected to the positive electrode of the second light-emitting diode 709, and the negative electrode of the second light-emitting diode 709 is grounded. After the microwave transmitter emits electromagnetic waves, the second light-emitting diode 709 will emit light because the electroscope is connected to the rectenna, indicating that the electroscope is working normally.

[0131] After the microwave transmitter emits electromagnetic waves, the rectenna supplies power to the electroscope. The first end of the first resistor 701 contacts the conductor inside the enclosed electrical device. When the conductor is not charged, that is, when the enclosed electrical device is not charged, the voltage regulator diode 705 does not conduct, and the base of the NPN transistor 706 is at a low level. Therefore, the collector and emitter of the PNP transistor 707 are disconnected. The current at the positive output end of the rectenna does not flow through the first light-emitting diode 708 and the PNP transistor 707. The first light-emitting diode 708 does not emit light, and there is no current at the emitter of the PNP transistor 707. The controller obtains a no-charge signal, which is a current signal with a current value of 0.

[0132] When the conductor is charged, that is, when the enclosed electrical equipment is charged, when the high-voltage AC voltage of the conductor exceeds the breakdown voltage of the Zener diode 705, the Zener diode 705 is turned on, and the base of the NPN transistor 706 is at a high level, so the collector and emitter of the PNP transistor 707 are connected, and the current at the positive output end of the rectifier antenna flows through the first light-emitting diode 708 and the PNP transistor 707. The first light-emitting diode 708 emits light, indicating that the enclosed electrical equipment is charged, and there is current at the emitter of the PNP transistor 707. The controller obtains a charged signal, which is a current signal with a current value not equal to 0.

[0133] It should be noted that the third resistor 703 , the second light emitting diode 709 and the first light emitting diode 708 may be removed from the electroscope.

[0134] For example, Figure 8 The contact diagram of the electroscope and the conductor provided for this application is as follows: Figure 8 As shown, an electroscope 801 is fixed on a conductor 802 via a clamp 803 , and the conductor contact end of the electroscope 801 contacts the conductor inside the enclosed electrical device.

[0135] The closed electrical equipment detection system provided in this embodiment uses a first resistor, a second resistor, a third resistor, a fourth resistor, a voltage regulator diode, an NPN transistor, a PNP transistor, a first light-emitting diode and a second light-emitting diode to form an electrical tester, thereby realizing electrical testing of closed electrical equipment.

[0136] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A closed electrical equipment detection system, characterized in that: include: Microwave transmitters outside enclosed electrical equipment, and detection equipment inside enclosed electrical equipment; The detection device includes a rectenna, and a controller, an electroscope, a temperature and humidity sensor, a pressure sensor, and a partial discharge detector respectively connected to the rectenna; The controller is respectively connected to the electroscope, the temperature and humidity sensor, the pressure sensor and the partial discharge detector; The microwave transmitter is used to transmit electromagnetic waves; The rectenna is used to receive the electromagnetic waves and convert the electromagnetic waves into direct current, and to supply power to the controller, the electroscope, the temperature and humidity sensor, the pressure sensor, and the partial discharge detector; The controller is used to generate a detection report according to the real-time signals transmitted by the electroscope, the temperature and humidity sensor, the pressure sensor and the partial discharge detector.

2. The closed electrical equipment detection system according to claim 1, characterized in that: The real-time signal transmitted by the electroscope is a charged signal or a non-charged signal, the real-time signals transmitted by the temperature and humidity sensor are temperature and humidity, the real-time signal transmitted by the pressure sensor is the insulating gas pressure, and the real-time signal transmitted by the partial discharge detector is a discharge signal or a non-discharge signal.

3. The closed electrical equipment detection system according to claim 2, characterized in that: The controller is configured to generate a detection report based on the real-time signals transmitted by the electroscope, the temperature and humidity sensor, the pressure sensor, and the partial discharge detector, specifically for: Determine the corresponding gas safety pressure range according to the temperature and humidity transmitted by the temperature and humidity sensor; generating a first detection result indicating whether gas is leaking according to the gas safety pressure range and the insulating gas pressure transmitted by the pressure sensor; generating, based on the real-time signal transmitted by the partial discharge detector, a second detection result indicating whether the enclosed electrical equipment has partial discharge; generating a third detection result indicating whether the enclosed electrical device is energized according to the real-time signal transmitted by the electroscope; The test report is generated according to the first test result, the second test result and the third test result.

4. The closed electrical equipment detection system according to claim 3, characterized in that: The detection device also includes an alarm device; The alarm device is connected to the rectenna and the controller respectively; The controller is further configured to control the alarm device to sound an alarm when it is determined that the first detection result indicates a gas leak, or the second detection result indicates a partial discharge of the enclosed electrical equipment, or the third detection result indicates that the enclosed electrical equipment is energized.

5. The closed electrical equipment detection system according to claim 4, characterized in that: The controller is also used to: determining whether there is abnormal gas pressure change in the enclosed electrical equipment based on historical temperature, historical humidity, historical insulating gas pressure, the insulating gas pressure transmitted by the pressure sensor, and the temperature and humidity transmitted by the temperature and humidity sensor; If it is determined that the gas pressure change of the closed electrical equipment is abnormal, the alarm device is controlled to issue an alarm.

6. The closed electrical equipment detection system according to claim 5, characterized in that: When the controller is used to determine whether there is abnormal gas pressure change in the enclosed electrical equipment based on historical temperature, historical humidity, historical insulating gas pressure, the insulating gas pressure transmitted by the pressure sensor, and the temperature and humidity transmitted by the temperature and humidity sensor, it is specifically used to: Determining a corresponding gas change safety range based on the historical temperature, the historical humidity, and the temperature and humidity transmitted by the temperature and humidity sensor; taking the difference between the historical insulating gas pressure and the insulating gas pressure transmitted by the pressure sensor as the pressure difference to be detected; If the pressure difference to be detected does not fall within the gas change safety range, it is determined that the closed electrical equipment has an abnormal gas pressure change; If the pressure difference to be detected falls within the gas change safety range, it is determined that there is no abnormal gas pressure change in the closed electrical equipment.

7. The closed electrical equipment detection system according to any one of claims 1 to 6, characterized in that: The detection device further includes a first communication unit; The first communication unit is connected to the rectenna and the controller respectively; The controller is further configured to report the detection report through the first communication unit.

8. The closed electrical equipment detection system according to claim 7, characterized in that: The microwave transmitter includes a processor, a second communication unit connected to the processor, and a display screen; The controller is further configured to send the real-time signals transmitted by the electroscope, the temperature and humidity sensor, the pressure sensor, and the partial discharge detector to the second communication unit via the first communication unit; The processor is configured to display the real-time signals transmitted by the electroscope, the temperature and humidity sensor, the pressure sensor, and the partial discharge detector and received by the second communication unit through the display screen.

9. The closed electrical equipment detection system according to any one of claims 1 to 6, characterized in that: The electroscope includes a first resistor, a second resistor, a third resistor, a fourth resistor, a voltage stabilizing diode, an NPN transistor, a PNP transistor, a first light emitting diode and a second light emitting diode; The first end of the second resistor is respectively connected to the second end of the first resistor and the cathode of the Zener diode, the second end of the second resistor is respectively connected to the anode of the first light-emitting diode, the first end of the third resistor and the positive output end of the rectifier antenna, the first end of the first resistor is in contact with the conductor inside the enclosed electrical device, the second end of the third resistor is connected to the anode of the second light-emitting diode, the cathode of the second light-emitting diode is grounded, the anode of the Zener diode is respectively connected to the first end of the fourth resistor and the base of the NPN transistor, the collector of the NPN transistor is connected to the base of the PNP transistor, the emitter of the PNP transistor is connected to the cathode of the first light-emitting diode, and the second end of the fourth resistor, the emitter of the NPN transistor and the collector of the PNP transistor are grounded; The emitter of the PNP transistor is connected to the controller.

10. The closed electrical equipment detection system according to any one of claims 1 to 6, characterized in that: The partial discharge detector is an ultrasonic sensor or a UHF sensor.

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