34results about How to "Realize live detection" patented technology

The invention relates to a high-voltage short-cable insulation terminal partial discharge testing device. One end of each cable is connected to the upper end of each protective layer protector. A power resistor is connected to the middle portion of each cable in series. The other end of each cable is connected with a grounding end of each protective layer protector and a direct grounding point of one end of each electric cable. A high-frequency current sensor is sleeved at intervals on the cable between the grounding end of each protective layer protector and each power resistor. An output end of the high-frequency current sensor is connected with partial discharge measuring equipment. The upper ends of the protective layer protectors of an insulation terminal and the grounding points are connected through the cables, output of the high-frequency current sensor is collected to complete partial discharge live detection of the insulation terminal, under the premise that normal operation of a circuit is guaranteed, live detection in which the protective layer protector is connected to the ground to detect electric cable terminal partial discharge is achieved, a testing process is quick, and convenience is achieved.

The invention discloses a method for detecting a post-type porcelain insulator damage by an employing vibration method. The method comprises the following steps: 1) post-type porcelain insulator three-dimensional finite element modeling: establishing a post-type porcelain insulator three-dimensional finite element model to obtain the stress distribution of the post-type porcelain insulators under two applications of a pipeline bus and an isolation switch, analyzing the cement expansion stress, temperature difference stress, operation stress, freezing stress-added stress concentration areas through ANSYS software; 2) post-type porcelain insulator breakdown diagnosis: combining the common defect of the post-type porcelain insulator, searching the discrimination of the vibration characteristic spectrum under different defects and severe degrees, and establishing the association; and 3) finally verifying correctness and rationality of the post-type porcelain insulator damage by employing the vibration method, and realizing the on-line detection. The method has high detection efficiency, realizes detection of groups of the porcelain, porcelain crack near to a flange port can be detected, and the status detection of central section of the flange, glue filling cement and cast iron flange can be realized.

The invention discloses an open type isolation switch open / close state detection method and device; the method comprises the following steps: building an open type isolation switch finite element simulation model; calibrating and verifying the finite element simulation model; respectively selecting at least one most sensitive mechanical oscillation signal change point on the surface of an open type isolation switch support, an operating mechanism and a transmission system as the vibration measuring point positions; obtaining the corresponding relations between typical machinery faults and vibration signals; carrying out field vibration detection for the open type isolation switch with an unknown machinery state on the vibration measuring point positions of the open type isolation switch support, the operating mechanism and the transmission system, and estimating the corresponding machinery states according to a fault diagnosis classifier. The method and device can accurately detect the open type isolation switch open / close state without changing the structure, are high in safety and reliability, thus satisfying the field operation maintenance needs.

The invention relates to a GIS fault diagnosis method based on a sound intensity cloud picture. The method is characterized by comprising the following steps: (1) arranging equally-spaced measure points at a GIS busbar tube and switch equipment, orderly scanning all measure points through a handheld annular sound pressure sensor array with five pairs of sensors, thereby obtaining sound pressure signals of the GIS at the busbar tube and the switch equipment at different working conditions; (2) computing the sound pressure signals obtained by five pairs of sensors in the step (1) to obtain a sound intensity value at each pair of sensors, and finally obtaining the 5*N sound intensity matrix, wherein the N is the amount of the measure point; and (3) performing cubic spline interpolation on theobtained sound intensity matrix to obtain the entire sound intensity cloud picture at the GIS busbar tube and the switch equipment, and then converting the color cloud picture into a gray picture. The live line detection can be realized, the entire sound radiation characteristic of the GIS is acquired, the judgment is accurate, and the measurement difficulty can be reduced.

The invention relates to an insulator detecting robot which comprises a control device, a wireless communication device and an insulator detecting device. The control device comprises a main control chip and a driving device connected with the main control chip. The wireless communication device and the insulator detecting device are connected with the main control chip. The top end and the bottom end of the control device are provided with sliding guide tracks respectively, and sliding blocks are arranged on the sliding guide tracks. The sliding blocks are provided with steering bearings. The power input ends of the steering bearings are connected with the driving device, and the power output ends of the steering bearings are connected with hook-shaped motion measuring arms. A remote control terminal is used for conducting wireless communication with the insulator detecting robot, wireless control on the insulator detecting robot is achieved, and further the insulator detecting robot is controlled to conduct live line detection on an insulator in an overhead transmission line.

The invention provides a live verification method of a current transformer. The method comprises a step of shielding the magnetic field generated by the current which goes through a primary side conductor in a current transformer to be detected, a step of introducing current into the current transformer to be detected, a step of detecting the real value of verification current, and a step of calculating the measurement error of the current transformer to be detected. Compared with the prior art, the live verification method and system of a current transformer provided by the invention have the advantages that the interference of a verification result by the current in the primary side conductor is eliminated by the shielding layer, the reliability of verification is improved, and the live detection of the current transformer to be detected is realized at the same time.

The invention discloses an equipotential charged X-ray detection method for overhead line hardware, which comprises the step of carrying out defect detection on the overhead line hardware by moving and rotating an X-ray detection device, and specifically comprises the following detection steps: completing conversion and installation of the X-ray detection device and a protection device from ground potential to equipotential; detecting personnel are converted from ground potential to equipotential; a detector performs transillumination of different angles at the same hardware fitting position through rotation of the X-ray detection device in the protection device, and the detector is converted from equipotential to ground potential; the conversion of the X-ray detection device and the protection device from equipotential to ground potential is completed; acquiring and analyzing images to obtain a detection report. According to the invention, an equipotential mode is adopted for detection, live detection of the overhead hardware fitting can be realized without too many auxiliary devices, the detection can be completed by at least two persons, the resource cost input is low, the detection is comprehensive and reliable, and the method is applied to various scenes.

The invention discloses a ceramic post insulator detection method based on vibrational acoustics. The method comprises the steps of designing a detection system, wherein the detection system comprises an excitation source, a signal receiving device and a result analysis system, the excitation source is a randomly vibrating exciter, the signal receiving device is used for recording and storing responses of an insulator to excitation, and the result analysis system is used for analyzing a software package of detection results; fixing an insulating rod bolt head provided with a screw in a threaded hole of an instrument panel; moving an instrument closer to a bottom flange of the insulator to be detected, making a probe perpendicular to the bottom face of the flange as much as possible, and sustaining the flange with great force till the instrument prompts 'test ends'; transmitting detection data to a PC through a dedicated data line, displaying a vibration power spectral density assessment diagram of the ceramic post insulator with dedicated analysis software, and conducting analysis. By the adoption of the method, internal and external flaw conditions of a ceramic part can be detected in detail in the presence of uninterruptable power.

The invention belongs to the capacitive equipment electrified detection technical field and relates to a capacitive equipment electrified detection end screen sampling device, in particular to a end screen single sampling device for electrified detection of the insulation condition of capacitive equipment. The capacitive equipment electrified detection end screen sampling device comprises an upper rotation mechanism, a middle rotary type wiring mechanism and a bottom fixing mechanism, wherein the rotation mechanism is connected with the rotary type wiring mechanism, and the lower part of the rotary type wiring mechanism is connected with the fixing mechanism; and the rotation mechanism includes a sealing cover, a detection joint and a detection core, wherein the detection joint is covered with the sealing cover, and the detection joint is connected with the detection core. As proved by retrieval, no reports on capacitive equipment electrified detection end screen sampling devices appear. With the capacitive equipment electrified detection end screen sampling device provided by the technical scheme of the invention, the electrified detection of the insulation parameters of capacitive equipment can be realized, and therefore, the insulation condition of the capacitive equipment under operating voltage can be effectively obtained, and safe and stable operation of the equipment can be ensured.

The invention relates to an overhead transmission line crossing distance online measurement method, which belongs to the technical field of laser ranging, and aims to solve the problems in the prior art. The method comprises the following steps that 1, a manually set swing range is inputted into an information processor; 2, the information processor controls a motor driver according to a manually set swing range, so that the motor driver drives a swing motor to continuously swing back and forth in the set range and drives a laser range finder to continuously swing back and forth, and the laser range finder scans the crossed unsafe area of the overhead transmission line; 3, a light beam emitted by the laser range finder is projected to a certain power transmission line to generate reflected light, a range finding value d1 is given, and a swing angle value recorded by the encoder at the moment is alpha1; when the light is projected to another power transmission line, reflected light is generated, a distance measurement value d2 is given, and a swing angle value recorded by the encoder at the moment is alpha2; 4, according to cosine theorem, the information processor calculates crossing distance of the transmission line;.

The invention discloses a fault detection system and method for a modular multi-level converter valve submodule IGBT (Insulated Gate Bipolar Translator). The system mainly comprises a self-energy extraction system, a pulse generation system, a trigger control system, a fault detection system and a data processing system. The method comprises the following steps that: 1) the pulse generation systemgenerates pulses, and transmits the pulses to the modular multi-level converter valve submodule IGBT; 2) the fault detection system acquires a response signal U<k> coupled by a gate pole of the modular multi-level converter valve submodule IGBT under pulsed excitation; and 3) the data processing system processes the response signal U<k>, and makes judgment to obtain a fault type. Energy is extracted from an energy storage capacitor of a submodule through the self-energy extraction system, thereby solving the problem of lack of an external power supply.

The invention discloses a cable joint discharge live detection method based on high-speed light sensation and pressure wave technologies, and belongs to the technical field of cable joint detection. Adischarge-pressure wave multi-physical field coupling model is constructed in a cable joint; a pressure wave sensor, an electric field sensor and a temperature sensor are used for collecting pressurewave information, electric field distribution, electric field intensity information and temperature information of a to-be-detected cable connector and transmitting the information to an informationprocessing unit; the information processing unit analyzes and processes the pressure wave information, the electric field distribution, the electric field intensity information and the temperature information according to the discharge-pressure wave multi-physical field coupling model; and a charge accumulation area, namely a hidden danger fault point, is determined according to an analysis result. The high-speed light sensation and pressure wave technology is adopted, and accurate detection of the cable joint is achieved.

The present invention discloses a pocket-sized air switch characteristic detection device, comprising an AC millivoltmeter, a protective resistor, an active power meter, a clamp-type transformer, a metal corkscrew, a spring contact, an infrared optical fiber, a germanium glass optical lens and an electric signal timer; one input end of the AC millivoltmeter is connected to a metal corkscrew through a protective resistor, and the other input end is directly connected to another metal corkscrew; the voltage signal end of the active power meter is connected in parallel with the two signal input ends of the AC millivoltmeter, and the current signal end is connected in series with the signal input end of the electric signal timer, and is connected to the secondary winding of the clamp-type transformer. The heads of the two metal corkscrews are provided with spring contacts, and an infrared optical fiber is provided at the center of one of the metal corkscrews, one end of the infrared optical fiber is connected to the spring contact, and the other end is connected to the germanium glass optical lens. The device of the present invention has the characteristics of convenient operation, light weight, live detection, arc extinguishing performance detection, and low cost.

The invention discloses an open type isolation switch open / close state detection method and device; the method comprises the following steps: building an open type isolation switch finite element simulation model; calibrating and verifying the finite element simulation model; respectively selecting at least one most sensitive mechanical oscillation signal change point on the surface of an open type isolation switch support, an operating mechanism and a transmission system as the vibration measuring point positions; obtaining the corresponding relations between typical machinery faults and vibration signals; carrying out field vibration detection for the open type isolation switch with an unknown machinery state on the vibration measuring point positions of the open type isolation switch support, the operating mechanism and the transmission system, and estimating the corresponding machinery states according to a fault diagnosis classifier. The method and device can accurately detect the open type isolation switch open / close state without changing the structure, are high in safety and reliability, thus satisfying the field operation maintenance needs.

The invention discloses a YDMC wire abrasion live telemeter, and belongs to the technical field of testing devices. Comprising a lead diameter detector and a data receiving and processing terminal, a chip is arranged in the lead diameter detector, the lead diameter detector further comprises a test caliper, a precision displacement sensor, a Bluetooth communication module and a high-voltage insulation operating rod, and the precision displacement sensor and the Bluetooth communication module are arranged in the lead diameter detector. The test caliper comprises a fixed guide rail, a movable ruler is arranged on the surface of the fixed guide rail and electrically connected with the precision displacement sensor, the precision displacement sensor is electrically connected with the chip, and the wire diameter detector is in signal connection with the data receiving and processing terminal through the Bluetooth communication module. The device is small and exquisite in design, convenient to carry and capable of conveniently and timely measuring wire abrasion, is a necessary testing instrument for electrified railway overhead line system wire abrasion detection, can achieve electrified wire abrasion detection and automatically calculate the abrasion percentage according to the measured value, and is more accurate and automatic in testing.

The invention relates to a partial-discharge charged detection method of a transformer. The method comprises the following steps of step 1, acquiring phase spectrums and classification spectrums of high frequency signals of an iron core of a transformer to be detected and a clamping component grounding lead wire respectively and determining whether obvious blocking gathering exists in the classification spectrums; step 2, carrying out clustering separation on the classification spectrums of the high frequency signals and dividing into different blocks according to a signal gathering condition; step 3, comparing the phase spectrum corresponding to each block to a typical partial-discharge phase spectrum of the transformer and determining whether a typical characteristic of partial discharge exists in the phase spectrum; step 4, selecting a typical point and extracting time domain and frequency domain images at a discharge signal gathering position of a suspected partial discharge phase diagram spectrum, comparing the time domain and frequency domain images to time domain and frequency domain images of a typical partial discharge signal of the transformer, and determining whether a typical characteristic of the partial discharge exists. The method has advantages that test process time is short and the transformer does not need to be stopped during detection.

The invention relates to an insulator detection robot, which includes: a control device, a wireless communication device and an insulator detection device, the control device includes a main control chip and a drive device connected to the main control chip; the wireless communication device and the insulator detection device are respectively connected with the main control chip; the top and bottom ends of the control device are respectively provided with sliding guide rails, and the sliding guide rails are provided with sliding blocks; the sliding blocks are provided with steering bearings, and the steering The power input end of the bearing is connected with the driving device, and the power output end of the steering bearing is connected with a hook-shaped motion measuring arm. The present invention realizes the wireless control of the insulator detection robot of the present invention through the wireless communication between the remote control terminal and the insulator detection robot, and further realizes the control of the insulator detection robot to perform electrification detection on the insulators in the overhead transmission line.

The invention discloses a live wire end shielding device of a power transformation device secondary element. The problem that the wire ends are difficult to bundle and distinguish due to the fact that secondary element wiring is complicated and lead wires are tightly arranged is mainly solved. The live wire end shielding device structurally comprises shielding device bodies and pressurization devices, wherein plug holes for lead wires to be plugged are formed in the shielding device bodies, and the upper portions of the shielding device bodies are provided with the pressurization devices. One side of each shielding device body is provided with an encoding dialer and a test hole, and the test holes are communicated with the plug holes in the shielding device. The lead wire ends for secondary element wiring can be respectively plugged into the shielding device bodies different in color, maintainers can conveniently and quickly shield and test electrified lead wires, very easily distinguish positions needing wiring restoration and achieve the purpose of correct, safe and quick operation.

The invention discloses a transformer oil level measuring device, which is characterized in that a mounting base is fixedly mounted at the bottom of a transformer oil tank, an ultrasonic probe and a leveling mechanism are mounted on the mounting base jointly in a matched manner, the leveling mechanism adjusts the mounting angle of the ultrasonic probe, and the ultrasonic probe detects the oil level in the transformer oil tank, an electronic display screen and a control unit are further installed on the mounting base, the ultrasonic probe is in signal connection with the control unit, and the control unit is used for recording the time when the ultrasonic probe transmits ultrasonic signals to the transformer oil tank and the time when the ultrasonic signals are reflected to the ultrasonic probe and calculating the oil liquid height, the control unit is in data connection with the electronic display screen and used for displaying the detected oil liquid height. The transformer oil level measuring device can efficiently perform disassembly and assembly work, improves the accuracy of oil level height detection, realizes remote monitoring of the oil level in each transformer oil tank, and improves the safety, reliability and sensitivity of products.

The invention relates to a high-voltage short-cable insulation terminal partial discharge testing device. One end of each cable is connected to the upper end of each protective layer protector. A power resistor is connected to the middle portion of each cable in series. The other end of each cable is connected with a grounding end of each protective layer protector and a direct grounding point of one end of each electric cable. A high-frequency current sensor is sleeved at intervals on the cable between the grounding end of each protective layer protector and each power resistor. An output end of the high-frequency current sensor is connected with partial discharge measuring equipment. The upper ends of the protective layer protectors of an insulation terminal and the grounding points are connected through the cables, output of the high-frequency current sensor is collected to complete partial discharge live detection of the insulation terminal, under the premise that normal operation of a circuit is guaranteed, live detection in which the protective layer protector is connected to the ground to detect electric cable terminal partial discharge is achieved, a testing process is quick, and convenience is achieved.

The invention discloses a circuit breaker switching on / off coil turn-to-turn short-circuiting fault detection method and belongs to the electric power equipment detection technical field and electric power equipment application technical field. The method includes the following steps of: 1, tested coil design: two taps of the outgoing line of a tested coil are adjusted so that the length of the two taps can be inconsistent; 2, fault detection and signal acquisition: a double-ended pulse method is adopted to detect the tested coil, so that waveform signals can be obtained; and 3, fault analysis: noise reduction is carried out on the waveform signals obtained at the two taps respectively in the step 2, and subtraction is carried out on the waveform signals which are obtained from the two taps respectively and have been subjected to noise reduction, so that fault characteristic waveforms can be obtained, and the fault characteristic waveforms are analyzed through the following manners: when the subtracted fault characteristic waveforms are a straight line, a turn-to-turn short-circuiting fault does not occur, and when the subtracted fault characteristic waveforms have non-zero protruding regions, a turn-to-turn short-circuiting fault occurs. The circuit breaker switching on / off coil turn-to-turn short-circuiting fault detection method of the invention has the advantages of high sensitivity, portable equipment, simple analysis and operation, intuitive judgment and high reliability, and is more suitable for on-site application.

The invention discloses a live detection device applied to a lightning arrester with a discharge gap and a control method, and relates to the technical field of lightning arrester monitoring. According to the live detection device applied to the lightning arrester with the discharge gap and the control method, accurate time service triggering is carried out through the Beidou time service module circuit, total current data of the ABC three-phase lightning arrester are synchronously collected, accurate time service triggering is carried out through the Beidou time service module circuit again, the digital power amplifier circuit is started, and the discharge gap is detected. High-frequency alternating-current voltage is injected from the discharge gap for multiple times, the ground potential of the lightning arrester is raised, disturbance is applied to capacitive current, data acquisition is carried out on total current, Fourier transform is carried out on multiple groups of total current data, and the total current is acquired; lightning arrester operation data such as full voltage, full current, resistive current, third harmonic, fifth harmonic, seventh harmonic, power and phase angle difference of the ABC three-phase lightning arrester are obtained, and full-state live detection of the lightning arrester with the discharge gap is achieved.

The invention discloses a fault detection system and method for a modular multi-level converter valve submodule IGBT (Insulated Gate Bipolar Translator). The system mainly comprises a self-energy extraction system, a pulse generation system, a trigger control system, a fault detection system and a data processing system. The method comprises the following steps that: 1) the pulse generation systemgenerates pulses, and transmits the pulses to the modular multi-level converter valve submodule IGBT; 2) the fault detection system acquires a response signal U<k> coupled by a gate pole of the modular multi-level converter valve submodule IGBT under pulsed excitation; and 3) the data processing system processes the response signal U<k>, and makes judgment to obtain a fault type. Energy is extracted from an energy storage capacitor of a submodule through the self-energy extraction system, thereby solving the problem of lack of an external power supply.

The invention belongs to the technical field of live detection of capacitive equipment, and in particular relates to a sampling device for the last screen of the live detection of the capacitive equipment, which is a sampling device for the last screen signal of the charged detection of the insulation state of the capacitive equipment. It includes an upper rotating mechanism, a middle rotating wiring mechanism and a bottom fixing mechanism. The rotating mechanism is connected to the rotating wiring mechanism, and the lower part of the rotating wiring mechanism is connected to the fixing mechanism. The rotating mechanism includes: a sealing cover, a detection joint and a detection core; wherein the sealing cover; the sealing cover; the cover is on the detection joint, and the detection core is connected to the detection joint. It has been proved by retrieval that there is no relevant report on the sampling device of the last screen of the live detection of capacitive equipment. Through the implementation of the technical scheme of the invention, the live detection of the insulation parameters of the capacitive equipment can be realized, thereby effectively obtaining the insulation state of the capacitive equipment under the operating voltage, and ensuring the safe and stable operation of the equipment.

The invention discloses a vehicle and a control method and system thereof and a storage medium, and the method comprises the steps: when the vehicle is in a fortification state or a locking state, carrying out the in-vehicle temperature detection and in-vehicle distance measurement through an ultrasonic temperature sensor, and obtaining first in-vehicle temperature and first distance measurement information; judging whether living things exist in the vehicle or not according to the first in-vehicle temperature and the first distance measurement information; if yes, prompt information is sent to a mobile terminal bound with the vehicle, so that remote fortification release or remote unlocking can be carried out on the vehicle. Therefore, by means of the method, in-vehicle living object detection is achieved, the cost can be reduced, and meanwhile the detection result is more reliable.

The invention provides an on-line ultrasonic three-dimensional imaging monitoring method for transformer windings. The method comprises steps of: disposing an ultrasonic transmitting probe and an ultrasonic receiving probe on a transformer housing so that an ultrasonic wave is reflected at the measured points of a winding; according to a time difference between ultrasonic wave transmission and ultrasonic wave reception, a wave velocity, and the positions of the ultrasonic transmitting probe and the ultrasonic receiving probe, calculating winding distance and transforming measured point positions into coordinate values in a transformer winding model coordinate system, wherein the distance from the transformer housing at the ultrasonic transmitting probe to the measured point is used as a coordinate value of the measured point in an axis; obtaining the three-dimensional coordinate values of a plurality of measured points and generating a transformer winding three-dimensional image; and comparing the transformer winding three-dimensional image with a pre-established transformer winding three-dimensional model image to determine whether the transformer winding is deformed or not. The method can carry out on-line monitoring on the transformer without power outage to ensure safe and reliable operation, and can realize the quantitative and visual inspection and analysis of a transformer winding state.

The invention relates to an under-voltage coil detection device and a power distribution cabinet detection system. The device comprises a low-frequency voltage generation module, a protection impedance and a metering loop, the input end of the low-frequency voltage generation module is connected with a power supply end, and a first output end of the low-frequency voltage generation module is connected with one end of the protection impedance. The other end of the protection impedance is connected with a second output end of the low-frequency voltage generation module through an under-voltage coil and a metering loop; a working voltage is connected between a first wiring terminal of the under-voltage coil and a second wiring terminal of the under-voltage coil; the low-frequency voltage generation module is used for performing frequency conversion voltage reduction processing on the working voltage and inputting the working voltage to the protection impedance; the low-frequency alternating-current voltage is input to the first wiring terminal of the under-voltage coil through the protection impedance; and the metering loop is used for calculating a resistance value between the first wiring terminal and the second wiring terminal according to the voltage on the first wiring terminal, and determining whether an under-voltage coil exists in the to-be-detected circuit. The device can realize live detection of the under-voltage coil.

The invention discloses a preparation method of a thermochromic composite insulating coating with high electric strength resistance, which is characterized by comprising the following steps: S1, preparing a thermochromic microcapsule, specifically comprising the following steps: 1) preparing an aqueous phase solution, 2) preparing an oil phase solution, and 3) preparing the thermochromic microcapsule; and S2, preparing the thermochromic composite insulating coating with high electric strength based on the thermochromic microcapsules. When the thermochromic composite insulating coating with high electric strength prepared by the invention is used for coating a cable joint, when the cable joint is overheated (higher than 65 DEG C), the color of the coating is obviously changed from blue to transparent, and live detection of local overheating of the cable joint can be realized.

The invention discloses a sensor for measuring the leakage current of a lightning arrester, which aims to solve the technical problem that it is difficult to accurately measure the leakage current of a lightning arrester in the prior art. It includes an upper aluminum electrode, a lower aluminum electrode, and a resistance sheet arranged between the upper aluminum electrode and the lower aluminum electrode. In the upper aluminum electrode, there is a detection positive electrode P+ that leads to the outside of the umbrella cover, and at the bottom of the lower aluminum electrode. There is a detection negative electrode P‑; the resistance sheet is formed by connecting a sampling resistor R and a protection valve sheet Z2 in parallel. The invention is simple in structure and easy to install, realizes the live detection of the leakage current of the arrester, converts the small current measurement into a voltage measurement, and leads it to the measuring instrument through the electrode for subsequent measurement, without affecting the lightning protection effect of the arrester body. It solves the problems of strong electromagnetic interference and difficult signal extraction in the detection process of the arrester leakage current in the prior art.