50results about How to "Shorten power outage maintenance time" patented technology

The invention discloses a fault on-line monitoring device of a high-voltage breaker and a monitoring method thereof. An opening Hall current transformer, a closing Hall current transformer and the normally-opened contact of a high-voltage breaker auxiliary switch are connected with a controller via wires. The controller is connected with a display terminal. The monitoring method comprises steps of acquiring data; calculating basic data; judging direct-current grounding faults of a high-voltage breaker mechanism and turn-to-turn short circuit faults of electromagnetic coils; judging the 'opened-after-closed' fault of the circuit breaker caused by a failure to keep an opening tripper of the high-voltage breaker mechanism to be closed; judging the fault of a failure of restoration caused by deformation of a reset spring of the high-voltage breaker mechanism; judging the jam fault of the tripper of the high-voltage breaker mechanism; and judging the jam fault of an iron core of an electromagnet. The fault on-line monitoring device is simple in structure and high in measuring precision; data is precise; the calibration method is simple and easy; and technical problems in the prior art are overcome.

Provided is a method for comprehensively analyzing and diagnosing deformation of a winding of a transformer. The method for comprehensively analyzing and diagnosing the deformation of the winding of the transformer comprises the stages of establishing a collecting and diagnosing system, collecting data of the winding of the transformer, carrying out logic analysis, area judgment, tendency judgment and comprehensive diagnosis on data of all phases and all frequency bands in frequency response tests, and the like. Through the method for comprehensively analyzing and diagnosing the deformation of the winding of the transformer, correct analyzing and judging conclusions of the deformation testing data of the transformer can be given timely and effectively through a comprehensive intelligent specialist distinguish library, the steps of draining oil, lifting a cover and then checking the winding of the transformer are avoided, the power outage overhaul time of the fault transformer is shortened greatly, powerful decision making bases are provided for the technological decision making of leaders, and a key function is performed for reducing external power outage time by the fault transformer.

The invention discloses a method and system for comprehensive inspection of power equipment, and the method comprises the steps: collecting a surface temperature signal and an ultrasonic signal of detection equipment and the operation condition data of the detection equipment, and respectively generating an infrared thermal imaging image and a sound wave image based on the surface temperature signal and the ultrasonic signal; sending the infrared thermal imaging image, the sound wave image and the detection equipment operation condition data to a cloud platform for storage; compositing a positioning sound source signal in the sound wave image to the infrared thermal imaging image to generate a composite thermal image; extracting a sound wave fingerprint based on the sound wave image; and judging the fault severity of the detection equipment based on the operation condition data of the detection equipment and the composite thermal image, and judging the fault type of the detection equipment according to the sound wave fingerprint.

The invention relates to a high-voltage direct-current power transmission TTM board card fault positioning system and fault positioning method thereof. The system includes a wave recording monitoring system, a VBE and a valve module which are connected in sequence, a thyristor triggering monitoring unit TTM board card in the valve module collects and processes a node signal that a converter valve needs to monitor, soon afterwards a processing judgment signal is transmitted to a signal collection communication board, and the signal is stored in a storage chip of the signal collection communication board; when a triggering monitoring case of the VBE detects that the TTM board card of a certain stage or multistage thyristor sends an overvoltage protection return pulse, energy taking return pulse disappears or the signal collection communication board detects a key signal abnormality of itself, wave recording is automatically started or wave recording is started in a manual mode; and a fault recording device performs fault positioning. The high-voltage direct-current power transmission TTM board card fault positioning system provided by the invention solves the problem that in a high-voltage direct-current power transmission converter valve body, under the working condition of strong electromagnetic field interference, tracking of a TTM board card key signal node cannot be realized in a fault section.

The invention discloses a method for diagnosing an impact on a metallic oxide arrester electrification test from inter-phase interference. The method includes: acquiring instantaneous voltage values at various sampling times from leads on high-voltages sides of an A-phase metallic oxide arrester and a C-phase metallic oxide arrester, calculating phase angles of instantaneous voltage via the Fourier algorithm, acquiring instantaneous leakage current values at various sampling times from grounding down leads of the A-phase metallic oxide arrester and the C-phase metallic oxide arrester, separating resistive current from instantaneous leakage current, calculating a phase angle of the resistive current via the Fourier algorithm, calculating an interference coefficient, and diagnosing by comparing the interference coefficient with a setting valve. By the method, the impact on the metallic oxide arrester electrification test from the inter-phase interference is accurately diagnosed, if any inter-phase interference leads a metallic oxide arrester electrification test result to be abnormal, the diagnosing result can provide powerful reference to testing workers for accurately analyzing insulating performance of the metallic oxide arresters, and testing workers' judgment error caused by the abnormal testing result due to the inter-phase interference can be effectively avoided.

The invention discloses a digital protection automatic test device and test method based on IEC61850, relating to the relay protection test field, and aims to realize automatic relay protection test. The test device comprises a digital protection device, a host computer and a lower computer; the lower computer is in connection with the process level of a device to be tested; the digital protection device, the host computer and the lower computer realize mutual data interaction; the host computer is in connection with a station control bus interface through an ethernet interface. The test device integrates a station control level and the process level, automatically identifies a protection type according to a debugging leading principle, automatically generates a debugging scheme, automatically combines an optimum test project and test formwork, automatically generates a fault report and a motion report, guarantees test integrity, substantially improves work efficiency, and reduces equipment power failure maintenance time.

The invention provides a dismounting method of an energy storage spring for a 10 kV metalclad withdraw switchgear circuit breaker. The method is implemented with a special tool. The special tool includes a body, a driving assembly mounted on the body, two sets of clamping stretching-contracting assemblies drivingly connected to the driving assembly and an auxiliary stretching-contracting assemblywhich is drivingly connected to the driving assembly and pinned to the two sets of the clamping stretching -contracting assemblies. The dismounting method includes cutting off a power supply of the circuit breaker, removing a handcart air plug of the circuit breaker, manually opening and closing a switch to release energy of the circuit breaker mechanism, adjusting the special tool to a ready state, holding and stretching the energy storage spring by using the special tool, dismounting a connecting lever fixing nut and removing a rotating connecting lever when the stretching length of the energy storage spring facilitates the removal of the rotating connecting lever arranged on the lower end of the energy storage spring, removing the energy storage spring for maintenance and the like. Thedismounting method of the energy storage spring for the 10 kV metalclad withdraw switchgear circuit breaker can be suitable for the dismounting of conventional various types of energy storage springs,is strong in applicability and convenient in operation, and improves the work efficiency.

The invention discloses a vehicle-mounted megger and dielectric loss forward and reverse connection measuring and wiring centralized conversion device.The device comprises a high-voltage signal conversion module and a high-low signal conversion module which are connected; the high-voltage signal conversion module is used for realizing conversion between a high-voltage signal of a dielectric loss tester and a high-voltage signal of a megger, the high-voltage signal conversion module leads the high-voltage signal to the high-low signal conversion module, and the high-low signal conversion module is used for realizing conversion between the high-voltage signal and a dielectric loss forward connection signal.Through the device, intelligent measurement of one-time wiring of a sleeve body dielectric loss (forward connection method), a sleeve end screen reverse connection dielectric loss (end screen ground dielectric loss) and sleeve end screen ground insulation resistance can be realized, preceding-stage intelligent switchover is provided for one-time wiring of a whole transformer, it is feasible to shorten work time and reduce the work danger coefficient in an actual transformer debugging test, work efficiency is improved, meanwhile, power-failure overhaul time of the transformer is shortened, and economic efficiency of the transformer is improved.

The invention relates to a cable fault full-automatic online navigation positioning system, comprising a case, a transmitting cellphone, and a receiving cellphone; the case is provided with a liquid crystal screen and a keyboard; a signal acquisition unit, a signal processing circuit, a CPU (central processing unit), a storage and a WIFI module are integrated in the case, wherein the signal acquisition unit is connected with the signal processing circuit, the signal processing circuit is connected with the CPU, and the CPU is connected with the storage, the liquid crystal screen, the keyboard,and the WIFI module. The system herein is used for monitoring insulation value of a cable and fault point distances of the cable online in real time, and transmitting positions of the cable fault points and a cable trajectory to the signal acquisition unit in the case in the first place; the signal processing circuit transmits the positions and the cable trajectory to the CPU; the CPU transmits the processed data to the transmitting cellphone and the receiving cellphone through the WIFI module; the data are displayed on related map software by the receiving cellphone, and navigation is provided to allow reach to the positions of the cable fault points.

The invention discloses a fixing structure for a detachable cable protection pipe, including a holt hoop iron I corresponding to a pole and towel pair. One end of the holt hoop iron is provided with an extension section. A cable protection pipe body is arranged at one side of the extension section. With the adoption of cooperation between the arc clamp loop and the extension section, the cable protection pipe body is tightly clamped. The fixing structure subversively changes the overall pipe-shaped structure of the original cable protection pipe, and the cable protection pipe is designed to have the detachable structure by a mode that one divides into two, so that in the installation or the later replacement process, the efficiency is greatly improved, and the cost is reduced. The fixing structure is easy to manufacture and strong in practicality.

The invention discloses a transformer substation operation inspection robot and an electrified area isolation method thereof, and aims to solve the technical problem that an electrified area is difficult to isolate accurately in the transformer substation operation inspection process. The robot comprises a robot body and an electrified area isolation device, the electrified area isolation device comprises an ultrasonic sensing module, an image recognition module, an electric field measurement module, a sound-light alarm module and a control module, a robot action route is planned according toultrasonic ranging, electric field ranging and image recognition, and the robot is controlled to give an alarm or be locked. According to the invention, the electrified area of a transformer substation can be actively isolated, the overall intelligent level of inspection equipment in the power industry is improved, the personal safety of operators is ensured, and the power failure maintenance timeis shortened.

The invention provides an extra-high-tension GIS self-contained insulation test platform based on an oil-immersed reactor. The platform comprises an insulation tester and a movable platform capable ofself-support lifting; the movable platform comprises a platform chassis, a main hydraulic cylinder arranged on the platform chassis, a carriage and a pedestal; the insulation tester is arranged on the movable platform via the carriage and pedestal, and the carriage and pedestal can be overturned for 90 degree and thus arranged vertically by the main hydraulic cylinder; and the insulation tester comprises a resonance reactor, a capacitive attenuator for measurement and a telescopic grading ring, a preset gap is kept between the resonance reactor and capacitive attenuator, one end of the resonance reactor and one end of the capacitive attenuator are fixed to the pedestal, and the other ends of the resonance reactor and capacitive attenuator are provided with the telescopic grading ring. Onsite equipment assembling and hoisting are not needed, the space occupied by equipment is reduced greatly, rapid transfer in a transformation station can be realized, and onsite AC withstand voltage test of extra-high-tension GIS equipment can be carried out safely and conveniently in the transformer station.

The invention discloses an assembled high-voltage isolation switch conductive disc which comprises two semi-circular disc mounting bases which are used in cooperation with each other and can be combined into a circular structure, a plurality of mounting holes are formed in the semi-circular disc mounting bases in the circumferential radial direction, and conductive roller mechanisms are arranged in the mounting holes. Each conductive roller mechanism comprises a touch roller head arranged at the bottom of the mounting hole, a guide seat matched with the touch roller head for use, a spring arranged at the end part of the guide seat, and an adjusting bolt for adjusting the compression amount of the spring; according to the technical scheme, on one hand, rapid installation can be realized, the power failure time is reduced, and the human, financial and material costs are reduced; on the other hand, operation reliability is high, corrosion resistance is high, mechanical strength is high, deformation is not likely to happen, the overhaul period is long, and maintenance is convenient.