373results about "Testing vessel construction" patented technology

The invention provides a transformer paper oil insulation experiment device integrated with electric heating combination ageing and partial discharge, and provides a corresponding experiment method. The experiment device comprises a high voltage portion, a low voltage portion and a sealing tank portion. The device can provide a platform of electric heating combination ageing and partial discharge experiments for a transformer paper oil insulation defect model, and can provide experiments of corona discharge, creeping discharge and air-gap discharge models in oil. The device has good air-tight performance, and can be isolated from external air and other influences. The whole system self cannot produce partial discharge, and the device cannot produce rust and other impurities in the partial discharge, can guarantee reliability of the partial discharge, and is simple in structure, convenient to operate, and capable of achieving good test effects.

The invention provides an impact characteristic simulation test apparatus of an earthing device and a method thereof, and belongs to the simulation test field of the earthing device. The impact characteristic simulation test apparatus comprises an impact current generator, a semispherical test bath, a simulation earthing device, a core penetration type current sensor, an impact voltage divider, a wideband digital oscilloscope, a coaxial shielding cable and the like. According to the method, by employing the apparatus in the invention, an impact simulation test of the earthing device is carried out. According to the invention, a soil discharge process that a real lightning current goes through the earthing device and flows to surrounding soil is simulated accurately, and an impact earthing impedance of the earthing device and an impact flow rule of the earthing device are measured. The apparatus has the characteristics of high reliability, good security, low test cost and the like. The apparatus and the method can be widely applied to measurement of the impact impedance and the impact flow rule of the earthing device under an effect of a heavy impact current, and are especially suitable for measurement of the impact impedance and the impact flow rule of the earthing device under an effect of a lightning current.

An apparatus for detecting a fault of a flying capacitor of an insulated condition detecting unit measures (step S1), at the start of discharge of the flying capacitor, a discharge voltage of the flying capacitor according to a charge voltage of a read capacitor. After a period from the start of discharge, the apparatus measures (step S3) a discharge voltage of the flying capacitor according to a charge voltage of the read capacitor. According to a difference between the measured discharge voltages, the apparatus obtains (step S5) a discharge amount of the flying capacitor, compares the discharge amount with a reference threshold, and diagnoses (step S7) an open fault of four capacitors that constitute the flying capacitor.

A sensor for picking up partial discharges in an electrical equipment tank filled with a dielectric fluid includes an antenna responsive to the electromagnetic waves generated by such partial discharges. In the sensor, the antenna is formed by two electrodes that are separated from each other by a dielectric resonator. With this arrangement, the sensor has improved sensitivity in the UHF range, while being of dimensions that are considerably smaller than dimensions of a conventional antenna for use in the UHF range.

The invention discloses a capacitive equipment insulation state real-time on-line monitoring method. On the basis that various types of capacitive equipment are monitored online, data acquired by an on-site on-line monitoring terminal is accurately analyzed and treated through upper-computer expert software, each parameter reflecting the equipment state is displayed visually on an expert software picture in the modes of diagrams, data and curves, alarms are sent out to operators on duty in three modes in time when an equipment failure is detected, and the instantaneity, the accuracy, the stability, the reliability and the timeliness of on-line monitoring are improved. The problems of large labor intensity, long test cycle, poor defect detection timeliness, influence on power supply reliability and the like are avoided, and power failure, power supply abnormalities and other phenomena caused by capacitive equipment insulation in a transformer substation are reduced.

The invention discloses a mobile assembled multifunctional integrated test stand, which has a layered structure. In the structure, a first layer is a groove structure; a second layer is a test plate which can be embedded in the first layer movably, and a plurality of holes are distributed on the test plate; the third layer is a support layer which is supported by the groove by an insulated rod; the fourth layer is an insulating cloth test stand; the circuit of the test units of the test stand adopts multi-branch design; each branch comprises an electronic tripping device and a digital display meter arranged on a power supply side of the branch; and the electronic tripping devices and the digital display meters are arranged below the insulation test stand of the fourth layer. The test stand has the advantage of meeting arrangement requirements in power distribution conventional insulating test product tests such as insulating gloves, shoes, clothes, rods, pipes, plates, security helmets, pillar-type insulators, needle-type ceramic bottles, suspended insulators and lighting arrestors.

The invention relates to a device and a method for measuring impact current divergence characteristics of an earth electrode, belonging to the technical field of analog experiments of an earthing device. The device mainly comprises an impact current generator, a hemispherical test groove, an analog earth electrode, a current sensor, a high-speed data collecting card, a control processing module, a display module, and the like. According to the method, the impact current divergence characteristics of the earth electrode are obtained by utilizing the device through the steps of determining an analog test proportional scale and adjusting analog test conditions, connecting an analog test loop, setting control processing parameters, collecting and processing test data and the like. The device has the characteristics of being simple and convenient to operate, high in measuring efficiency, accurate in measuring result, wide in application range and the like. The device and the method can be widely applied to measuring the impact current divergence characteristics of the earth electrode under the effect of large current impact, and is particularly suitable for measuring the impact current divergence characteristics of the earth electrode under the effect of lightning current under the conditions of non-uniform soil and complex topography.

The present invention provides a barometric pressure humidity controllable local discharge test device, pertaining to the high-voltage test equipment, specifically to a local discharge test device, wherein, the barometric pressure humidity controllable local discharge test device includes an insulation test box, the insulation test box is sealed, the top of the insulation test box is lead in a high pressure electrode, and a metallic substrate is provided at the bottom in the insulation test box, and the metallic substrate is grounded; the barometric pressure humidity controllable local discharge test device also includes a humidity regulator and a barometric pressure regulator communicated to the internal of the insulation test box. The inventive barometric pressure humidity controllable local discharge test device can regulate the humidity and barometric pressure in the test box to simulate different environments by setting the humidity regulator and the barometric pressure regulator in the test box, as the invention has simple structure and small size, it is suitable for the test of power equipment part with relatively small dimension and can effectively reduce costs.

The invention, which belongs to an electrical engineering and mechanical technology field, discloses a vacuum arc observation apparatus capable of being operated with an adjustable speed and relates to a switching device which is used to observe vacuum arc and detect an influence degree of an on-off speed curve to arcing. In an observation apparatus, an upper surface of a permanent magnetic actuator which is taken as an actuator part is connected with an insulating bar. A displacement sensor is installed on a side surface of the permanent magnetic actuator. The permanent magnetic actuator and the displacement sensor are connected with a control module through a control wire respectively. The control module is connected with a high-speed digital camera through the control wire. An upper end of the insulating bar is connected with a moving contact. A static contact, which is vertically and fixedly installed above the moving contact, has a certain gap with the moving contact. According to the invention, a structure is simple, motion dispersibility is small and speed regulation operation is convenient to be realized. The apparatus is economic, reliable and is easy to be maintained. The apparatus is not interfered by an external environment. The apparatus can be used in a production unit of a vacuum interrupter and a test platform of a research institution.

A partial discharge detecting device includes an electric field sensor including: a first electrode configured to detect by capacitive coupling a partial discharge signal generated by an electrical object and to provide a corresponding first electrical signal, and a second electrode isolated from the first electrode and structured to detect an environmental noise and to provide a corresponding second electrical signal. The detecting device further includes a transmission line structured to propagate an output signal obtained from the electric field sensor toward an external analysis apparatus and an electronic module connected to the first and second electrodes and structured to process the first and second electrical signals and to provide the output signal to the transmission line. The electronic module is structured to decouple the electric field sensor from the transmission line and avoid resonance of the electric field sensor with the transmission line.

The invention relates to an apparatus for triggering the electric tree of an epoxy resin insulating material by using variable pulse voltage. The apparatus comprises an electric tree experimental platform and a high-voltage pulse power supply assembly. The electric tree experimental platform comprises a thermotank, a liquid nitrogen tank and an objective table. The liquid nitrogen tank communicates with the inside of the thermotank through a pipeline. A test sample is fixed to the objective table. One end of the high-voltage pulse power supply assembly is grounded and the other end of the high-voltage pulse power supply assembly passes through the top of the thermotank to be inserted into the test sample. A grounded aluminum foil is arranged between the test sample and the objective table. Compared with the prior art, the apparatus in accurate in data acquisition and beneficial to insulation reliability evaluation.

The invention discloses a device for monitoring the electric strength of the insulating oil medium for an on-load tapping switch on line, comprising a high-voltage testing bin and a controller. The high-voltage testing bin is connected in series in a circulating pipe of an on-load switch on-line oil purifying device and provided with a pair of testing electrodes; the output end of a voltage-increasing transformer T1 is electrically connected with the wiring terminals of a pair of testing electrodes so as to apply testing voltage to the pair of testing electrodes; and the controller is used for controlling the voltage increasing and decreasing of the voltage-increasing transformer T1. When the oil breaks down, due to the dual protection of an overcurrent protection device and the controller, the high-voltage power supply is cut off quickly and automatically. When the electric strength of the insulating oil medium for the on-load tapping switch is lower than the predetermined index, the oil is filtered automatically on line by the high-precision high-efficiency particle removing filter and water removing filter, thus the content of particle impurities and trace water in the oil is reduced, the breakdown voltage of the oil is improved, the insulating level of the on-load tapping switch is guaranteed, and the requirements for high-security high-reliability power operation at present are adapted better.

The invention provides a plate electrode device for measuring electric characteristics of oil flow. The device comprises an insulating shell and a metal aluminum electrode. An oil passage is formed in the insulating shell. Inwards-sunken grooves are formed on the end faces, where the inner sides of the oil passages are, of the insulating shell. The metal aluminum electrode comprises an upper electrode and a lower electrode. Each electrode comprises a main body and a column body which is extended upwards from the main body. Through grooves are filled with the column bodies of the metal aluminum electrode. The grooves are filled with the main bodies of the metal aluminum electrodes. An oil paper sample is positioned in the oil passage, and is fixed by oil paper fixing parts. The plate electrode of which the lower electrode is adjustable in height is embedded into the closed insulating shell, the position of the oil paper sample in the oil passage is adjusted by the oil paper fixing parts, and external accessories are matched, so that alternating current voltage, direct current voltage and alternating current-direct current voltage can be applied, an interval between the two electrodes is adjustable, the position of the oil paper sample in the oil passage is adjustable, and experimental researches on the electric characteristics of the oil flow of a transformer are diversified and targeted.

The present invention relates to high voltage electrode device for space charge measuring system operating on electroacoustic pulse method, and belongs to the field of electroacoustic pulse method space charge measuring technology. The device includes earthed shielding metal shell, insulator supporting column and high voltage metal electrode column connected to the lower end of the supporting column, insulating resin packing part around the high voltage metal electrode column and earthed electrode plate below the high voltage metal electrode column. The device features that it also includes one upper shielding disc inside the shielding metal shell and one lower shielding disc on the earthed electrode plate. These two shielding discs have center hole for the high voltage metal electrode column to pass through and mutual inserting uneven structures in the opposite surfaces. The present invention can eliminate interface between solid and air surface, increase air surface distance and raise the puncture voltage greatly.

The invention discloses an electrode system for a flat insulation sample breakdown test. The electrode system comprises a test electrode, a support structure, an elastic structure, an electrode lead and a test container (10). The test electrode is composed of a high-voltage electrode (1) and a ground electrode (2); and a sample (11) is arranged between the high-voltage electrode and the ground electrode. The support structure includes one set of polytetrafluoroethylene rods (3) and three pieces of rectangular organic glass (4). The elastic structure includes a spring (5), a cylindrical rod (6)and a pressure equalizing ball (7). The electrode lead is formed by a high voltage end lead (8) and the ground end lead (9). Therefore, researches of breakdown characteristics of flat material insulation samples of different materials can be performed well; with the elastic structure, the steps of replacing the sample are simplified and the electrode and the insulation sample are in close contact; because of electrode chamfering, point discharge electrode field homogenization can be avoided, the dispersion of the breakdown voltage can be reduced, and accurate measurement of the sample breakdown voltage can be realized.

The invention relates to an electrode system and method applicable to multi-size insulating cardboard breakdown strength tests. The electrode system comprises a bottom plate, a ground lead terminal, a ground electrode rod, a fixed screw, a high voltage insulator, a lifting handle, a high voltage electrode, a high voltage electrode rod, an electrode mounting plate, a high voltage terminal, a ground electrode and a movable screw, wherein both of the ground electrode rod and the high voltage insulator are fixed to the bottom plate, and both of the fixed screw and the movable screw are installed on the electrode mounting plate; and the high voltage terminal is arranged at the upper part of the high voltage electrode rod, and the ground lead terminal is arranged at the lower part of the ground electrode rod. By adoption of the electrode system and method provided by the invention, researches on the paper oil insulation breakdown properties can be better executed, multi-size oil immersed insulating cardboards with different shapes and different thicknesses are fixed in the electrode system, the breakdown strength tests are executed by changing the oil gap width and applying different voltage forms, and reference is provided for the insulation design of converter transformers and the tests of high voltage DC transmission equipment.

The invention discloses a gas arcing characteristic and arc extinguishing performance multi-parameter detection system and method. The multi-parameter detection system comprises a gas arc switch-on and switch-off experiment table, a multi-parameter detection module used for synchronously detecting a plurality of physical parameters of a gas arc and outputting corresponding detection signals in thegas arc on-off process, a comprehensive control system used for providing a control signal for the gas arc switch-on and switch-off experiment table and providing a detection trigger signal for the multi-parameter detection module, a signal conditioning module used for conditioning the first group of detection signals output by the multi-parameter detection module, a data acquisition module usedfor receiving the second group of detection signals output by the multi-parameter detection module and the first group of detection signals conditioned by the signal conditioning module. Through one-time arc switch-on and switch-off experiments, one-time unified measurement of multiple physical parameters in the gas arcing and arc extinguishing processes is achieved, and gas arc characteristics and the arc extinguishing performance can be mastered comprehensively from various aspects.

Tester for testing ignition capability and voltage resistant capability of sparking plug and testing method and uses, at least including one sparking plug test chamber, which is filled with pressure gas and is closed in testing the sparking plug, the closed chamber is filled with pressure gas, flank of the test chamber is mounted with sparking plug test station for placing being tested sparking plug, the being tested sparking plug is placed on the sparking plug test station; simultaneity the tester also includes three needles electrical discharger chamber for matching sparking plug test; and the three needles electrical discharger and the sparking plug are provided with identical voltage detecting pulse high-voltage power supply by the sparking coil of the same ignition system at the same time. The tester for testing ignition capability and insulator arching capability of the sparking plug, possessing advantages of simple and intuition, and the testing device is mot complicated, which can be widely used in each engine works in domestic automobile industry and aftermarket.

A transformer paper oil insulation surface flashover and breakdown joint test device comprises an oil bath module, a high-voltage source module, a CCD observation module, a detection electrode and aninsulation support module. The detection electrode and the insulation support module are arranged in the oil bath module, the CCD observation module configured to observe the surface flashover and breakdown of a sample in real time is located at the external portion of the oil bath module, and the high-voltage source module is connected with the detection electrode and is configured to perform switching of the surface flashover experiment high voltage and a breakdown experiment high voltage through a high-voltage relay. The transformer paper oil insulation surface flashover and breakdown jointtest device achieves experiment device development for the dependency of the paper oil insulation surface flashover performances and breakdown performances, performs surface flashover experiment forthe same sample and then performs breakdown experiment for the same sample to research the influence of the sample surface flashover on the breakdown performances.

The invention discloses an intelligent AC withstand-voltage test system which comprises an AC withstand-voltage tester, a high-voltage test box and a control part. The intelligent AC withstand-voltage test system is characterized in that the high-voltage test box comprises a box body frame, a hopper, an insulation test box, a circulating box, a chain wheel, a chain wheel support rod, a first cylinder, a second cylinder, a fourth cylinder, a fifth cylinder and a sixth cylinder; and the control part comprises a power supply, a logic circuit, an overcurrent detection circuit and a timing circuitand used for controlling the work of all cylinders. When the test system is used for a test, a sample is put in the full-automatic high-voltage test box, a test electrode of the sample can be subjected to automatic arrangement and withstand-voltage test through the control circuit, thus the system is simple in operation and is safe and reliable. Because a metal ball completely wraps on the outer surface of the sample to be tested under the action of the shape and the self-weight of the metal ball per se, the withstand-voltage performance of all surfaces of the sample to be tested can be measured to ensure that the test result is more accurate. Meanwhile, the metal ball can be recycled and repeatedly used, thus the test cost can be greatly reduced.

The invention discloses a transformer dry casing defect simulation and performance state monitoring system and method. Two ends of a conducting rod are connected with a transparent organic glass cavity through sealing rings, two ends, extending out of the transparent organic glass cavity, of the conducting rod are respectively connected with a first grading ring and a second grading ring, one endof the conducting rod is connected to a voltage source output end of the voltage source module through the first grading ring and a corresponding connector lug, a test signal interface of a dielectricresponse test module is connected with one end of a conducting rod through the first grading ring and the corresponding connector lug, a monitoring signal interface of a discharge characteristic monitoring module is connected with the other end of the conducting rod through a second grading ring and a corresponding connector lug, and the two ends of the conducting rod are connected to two poles of a current source module through the first grading ring and the corresponding connector lug, and the second grading ring and the corresponding connector lug respectively; according to the invention,accurate detection and simulation of casing defects can be realized.

The invention discloses a super-high-temperature high-voltage dust specific resistance measuring device, comprising an electric heater, a high-voltage DC power, a high-temperature electric furnace, a low-voltage electrode, a circular high-voltage electrode, a low-voltage electrode suspending mechanism and a high-voltage electrode bracket, wherein the low-voltage electrode and the circular high-voltage electrode are all positioned in the high-temperature electric furnace, the low-voltage electrode is above the circular high-voltage electrode, a dust sample is arranged between the low-voltage electrode and the circular high-voltage electrode, the low-voltage electrode is connected with a negative electrode of the high-voltage DC power through the low-voltage electrode suspending mechanism and a tiny current detecting instrument; the high-voltage electrode bracket is fixed below the high-temperature electric furnace and is connected with the positive electrode of the high-voltage DC power, an upper end thereof is propped against the bottom of the circular high-voltage electrode after passing through a through hole on a baseboard of the high-temperature electric furnace, and the high-voltage electrode bracket is separated from the high-temperature electric furnace baseboard. The super-high-temperature high-voltage dust specific resistance measuring device effectively solves the problems that efficient insulation to the high-voltage electrode cannot be used in the traditional measuring device since the insulation property of the solid insulation material is reduced in high temperature; the specific resistance, breakdown voltage and leakage current of the dust can be accurately measured on super-high-temperature of 1000 DEG C.

The invention relates to the research field of gas discharge and gas insulation performance, especially a vacuum experimental device for measuring gas Thomson discharge parameters. The technical problem solved by the invention is to meet the measurement requirements of Thomson discharge parameters. The technical scheme of the invention Including the photoelectric double-channel high-voltage sealing sleeve passing through the upper cover of the discharge chamber to connect with the discharge gap, the Rogowski upper electrode is installed with an entrance for exciting electrons, the optical lens is designed to be replaceable, and the vacuum baffle valve connects the discharge chamber to the discharge chamber. It is connected with the vacuum system, and the sealed transmission package is installed on both sides of the lower cover of the discharge chamber. The discharge gap is connected with the vacuum electrode through the lower electrode connection line. The regulator inflates the discharge chamber through the sample gas channel. The vacuum discharge chamber is equipped with an extended observation window, a main observation window, and an extended connection port. The contact surfaces of each opening are sealed with fluorine rubber O-rings.

A thermoelectric insulating medium fault simulation device comprises a sealed container, a self-heating electrode module, a high-voltage electrode, a high-voltage wall bushing, a low-voltage wall bushing, a sample inlet, a sampling port, a discharge detection device, a temperature controller, a heating power source, a plate penetrating flange, an electric heating rod, a pressure detector, a microwater detector, a discharge signal sensor, a first temperature sensor and a second temperature sensor. In operation, simulation of three types of thermoelectric complex faults can be realized throughthe temperature controller and includes simulation of thermoelectric complex faults with different thermoelectric positions, simulation of thermoelectric complex faults with same thermoelectric positions and simulation of thermoelectric complex faults under high-temperature and discharge complex action.

The invention provides a power frequency modulation series resonance test system. The system comprises a voltage regulator, an excitation transformer, an adjustable reactor, a rotating speed acquisition module, an inductance value adjusting module and a control and measurement module. The voltage regulator provides a voltage for a primary side of the excitation transformer. A secondary side of the excitation transformer is connected to the adjustable reactor. The adjustable reactor is connected to an externally-connected detected test object which needs a power frequency voltage. The inductance value adjusting module is used for adjusting an inductance value of the adjustable reactor. The rotating speed acquisition module is used for collecting a motor rotation speed of the adjustable reactor and feeding back to the control and measurement module. The control and measurement module drives the inductance value adjusting module to adjust the inductance value of the adjustable reactor. A whole system carries out resonance under a power frequency. By using the power frequency modulation series resonance test system, the inductance value can be positioned in a high precision mode and fine tuning of the voltage is realized; and through cooperating with the excitation transformer, the voltage regulator, control and measurement equipment and the like, a voltage withstanding test of a capacitance test object under a condition of 500KV and below and an automation test of partial discharge can be completed.

The invention discloses an insulation inspection device (1) provided with a chamber (100) capable of accommodating a stator (200) with windings; electrodes (111, 112) capable of running along the coil ends ( 220) peripheral movement; a voltage applying unit (121), which is used to apply a voltage between the coil end (220) and the electrodes (111, 112); a detection unit (122), which detects the coil end (220) and a current and / or voltage between the electrodes (111, 112); and a pressure reducing unit (130), which reduces the pressure in the chamber (100).

The invention discloses a GIS (Gas Insulated Switchgear) test platform capable of adjusting an electrode structure. The test platform consists of an electrode telescopic control structure (1) and a test object delivery device (2), wherein the electrode telescopic control structure (1) consists of a telescopic control device (11), electric equipment (10), a telescopic electrode (8) and a fixed contact (9); one end of the telescopic electrode (8) is connected with the electric equipment (10) through the telescopic control device (11), and the other end of the telescopic electrode (8) is in non-contact connection with the fixed contact (9); the test object delivery device (2) consists of a rocker arm (3), a telescopic arm (4), an air valve (5), a test object table (6) and a check valve (7); the upper part of the test object table (6) is provided with a telescopic arm (4); the lower part of the test object table (6) is provided with the check valve (7); a lateral part of the test object table (6) is provided with the air valve (5); and the upper end of the telescopic arm (4) is provided with the rocker arm (3). The invention provides the GIS test platform capable of adjusting the electrode structure; the problems of electrode structure adjustment and test sample placement when the GIS cavity is filled with a gas are solved; and the test platform has the advantages of automatic operation, convenience in use and the like.

The invention discloses a transformer partial discharge denoising method based on a synchronous compression wavelet transform domain. The method comprises the following steps that: carrying out wavelet transform on an analog local signal to obtain a wavelet coefficient matrix; carrying out high-order statistics analysis on the wavelet transform coefficient matrix, utilizing a kurtosis threshold value criterion to carry out noise preliminary restraining on the wavelet transform coefficient matrix to obtain a corrected wavelet transform coefficient matrix; utilizing the corrected wavelet transform coefficient matrix to obtain a synchronous compression wavelet transform coefficient matrix, and adopting a generalized cross validation algorithm to obtain the noise threshold value level of the synchronous compression wavelet transform coefficient matrix; utilizing the noise threshold value level, and adopting a shear threshold value algorithm to carry out residual noise restraining on the synchronous compression wavelet transform coefficient matrix to obtain the synchronous compression wavelet transform coefficient matrix with small noise interference; and carrying out synchronous compression wavelet inverse transform on the synchronous compression wavelet transform coefficient matrix with small noise interference to obtain a pure partial discharge one-dimensional time domain signal. The method has the advantages of high denoising accuracy and short operation time, and is suitable for occasions of transformer partial discharge denoising.