16 results about "Conductor gallop" patented technology

This invention proposes a method for inverting conductor galloping parameters based on ground wire electromagnetic signals. The method involves acquiring the ground wire electromagnetic signal and performing spectral analysis to identify additional frequency components. Based on the number and distribution characteristics of these additional frequency components, the order and frequency of conductor galloping are preliminarily determined. Using the preliminarily determined galloping order and frequency, the galloping amplitude and phase of each phase conductor are inverted using the correspondence between characteristic frequency components and galloping amplitude. Based on the verification results of the characteristic frequency components, the specific order of conductor galloping is determined, and the galloping parameters are output. This invention can identify the order of conductor galloping and invert parameters such as galloping amplitude and frequency, effectively solving the problem that traditional ground wire electromagnetic monitoring methods can only analyze first-order galloping.

The invention provides a power conductor galloping track extraction and vibration parameter automatic fitting method, and relates to the technical field of power transmission line state monitoring, and the method comprises the steps: collecting and preprocessing a visible light video of a power transmission line, and obtaining an enhanced image; performing Canny edge detection, contour extraction and screening on the enhanced image to obtain a lead area; determining the observation position of each node of the power transmission line in the lead area; establishing an ID-frame-coordinate mapping relation based on multi-point trajectory tracking of nearest neighbor distance matching in combination with observation positions of nodes; and fitting the galloping trajectory of the power transmission line through a trajectory analysis method based on the combination of frequency spectrum estimation and nonlinear fitting in combination with an ID-frame-coordinate mapping relationship. According to the technical scheme, the position of the wire node can be stably identified under different illumination and background conditions, and the motion trail of the wire node can be automatically tracked and extracted.

This application relates to the field of transmission line galloping early warning technology, specifically to a method for early warning of transmission line conductor galloping based on a multi-factor coupling model. The method includes: comparing the differences between all class feature values ​​and their effective values ​​for each conductor at the current moment to determine the bearing deviation; comparing the deviation between the displacement velocity of each point on each conductor in any direction and the fitting result to determine the conductor galloping transmission value; analyzing the distance from each point on each conductor to the transmission tower at the current moment, and combining the bearing deviation and the conductor galloping transmission value to determine the conductor galloping judgment value, thereby obtaining corrected displacement data; and using sparse regression to obtain a conductor galloping model for early warning of conductor galloping. This application aims to improve the accuracy of early warning for transmission line conductor galloping.

The invention discloses a transmission conductor galloping displacement abnormity monitoring method based on Beidou RTK, relates to the technical field of conductor displacement monitoring, solves the technical problems of low reliability of galloping parameter calculation and abnormity judgment and lack of continuous over-limit trend prediction capability, and provides a transmission conductor galloping displacement abnormity monitoring method based on Beidou RTK by realizing accurate coordinate system conversion and eliminating projection deformation influence. Two form reconstruction methods are provided, flexible selection can be performed according to requirements, meanwhile, environmental parameters such as real-time icing and wind speed are fused into a three-dimensional kinetic equation, the goodness of fit between a model and an actual galloping state is improved, an LSTM-ARIMA mixed time sequence model is constructed for a continuous overrun scene, and the abnormal trend is predicted in combination with meteorological data in the future 72 hours, so that the prediction accuracy is improved. And meanwhile, a three-dimensional composite risk index is introduced, three types of trends of slow remission, stable maintenance and rapid deterioration can be pre-judged in advance, and operation and maintenance personnel can deploy resources in advance according to the trends, so that the conversion from passive alarm to active prevention and control is realized, and the fault response time is shortened.

The invention discloses a power transmission line galloping nonlinear simulation and prediction method, system and device based on microtopography multi-source data driving and a medium, and the method comprises the steps: analyzing a power transmission line GIM model and geographic elevation data, and constructing a three-dimensional digital twinborn model; secondly, introducing a microtopography correction factor to carry out downscaling correction on the macroscopic meteorological wind speed, and obtaining a local flow field of the conductor; then, based on the non-linear aerodynamic characteristics of the ice-coated conductor, establishing a 3-DOF coupling kinetic equation containing vertical, horizontal and torsional degrees of freedom; and finally, solving a conductor galloping track and amplitude through a time integration algorithm, and issuing risk early warning based on an inter-phase distance threshold. According to the method, the micro-topography wind field effect and the multi-degree-of-freedom coupling mechanism can be truly reflected, the prediction accuracy of the power transmission line galloping disaster is remarkably improved, and a scientific basis is provided for power grid disaster prevention.

The invention discloses a frequency-increasing friction nanometer generator based on conductor galloping and a wireless monitoring device, and relates to the technical field of new energy. According to the frequency-increasing type friction nanometer generator based on conductor galloping, conductor galloping is converted into reciprocating swing through the swing response assembly, frequency-increasing type friction power generation is achieved through cooperation of the friction power generation assembly and the reciprocating swing of the swing response assembly, and therefore the whole generator conducts electro-mechanical transformation at the high response frequency. The problem of how to effectively collect the vibration energy under the conductor galloping condition of the power transmission line and improve the response frequency of the TENG at the same time is solved.

The application provides a conductor galloping fine inversion method based on time domain envelope feature extraction. An induced signal on a ground wire of a power transmission line is acquired; a time domain envelope line feature of the induced signal is extracted; the time domain envelope line feature is input into a pre-trained mapping model, wherein the mapping model is obtained through sample data learning, and is used for establishing a mapping relationship between the time domain envelope line feature and conductor galloping parameters; and according to an output result of the mapping model, obtained conductor galloping parameters are obtained, wherein the conductor galloping parameters at least include a longitudinal amplitude, a transverse amplitude and a galloping ellipse inclination angle. The application effectively solves the problem that a traditional galloping monitoring method ignores transverse offset, and realizes fine inversion of the longitudinal amplitude, the transverse amplitude and the galloping ellipse inclination angle of conductor galloping.

The invention relates to the technical field of power transmission line monitoring, in particular to a power transmission line conductor galloping suppression control method, which comprises the steps of acquiring galloping state data of a power transmission line conductor in real time based on a sensor system; determining a conductor galloping interval of the power transmission line according to the strain change data, and performing data calculation on the acceleration data to obtain real-time attitude information of conductor galloping and motion acceleration under a global coordinate system; galloping characteristic parameters are extracted; constructing a fuzzy PID controller, and inputting the extracted galloping characteristic parameters to calculate an optimal damping set value; and controlling the semi-automatic friction damper to output corresponding damping force so as to restrain conductor galloping of the power transmission line. Compared with the traditional passive suppression means such as a vibration damper, structural reinforcement and a mechanical damper, the self-adaptive suppression control on the galloping of the conductor has stronger adaptability and suppression effect, and the safety and stability of the operation of the power transmission line are effectively improved.

The application discloses an icing conductor galloping test method, system, device and storage medium, relates to the technical field of transmission line galloping detection, and comprises the following steps: S1, geometric shape data of the icing conductor to be tested is acquired; S2, an icing conductor test model is constructed according to the geometric shape data, the icing conductor test model is placed in a stable airflow field, and the icing conductor test model is controlled to gallop under the action of aerodynamic force, so that galloping image data of the icing conductor test model is obtained; and S3, aerodynamic data of the icing conductor is determined according to the galloping image data, the aerodynamic data is processed by using a nonlinear dynamics sparse identification algorithm, a nonlinear dynamics equation under a test working condition is established, the aerodynamic force in the test process is back calculated, dynamics parameters are calculated according to the aerodynamic force in the test process, the dynamics parameters of the icing conductor include a lift coefficient, a drag coefficient and a moment coefficient, and icing conductor galloping test results are obtained.

This invention discloses an equivalent loading method and system for galloping loads on icy power transmission lines based on finite element analysis. A conductor model is established based on actual line parameters, and the conductor is modeled and initial tension is applied using engineering simulation software. Three-dimensional aerodynamic parameters are obtained through wind tunnel tests at full wind angle of attack, and an aerodynamic load mathematical model is constructed to calculate the load on the conductor. The calculated load magnitude is then applied as a concentrated load at the nodes of the conductor. This invention utilizes a quasi-static load conversion strategy to equate dynamic aerodynamic forces to concentrated loads at the nodes. Combined with nonlinear conductor form-finding and wind tunnel test data, it achieves efficient and accurate galloping simulation. This solves the problems of low iteration efficiency and high model complexity in dynamic fluid-structure interaction, providing an efficient and reliable technical means for anti-galloping design and disaster prevention assessment of transmission lines.

The invention discloses an iced conductor galloping characteristic rapid prediction method and system based on image driving, and the method comprises the steps: carrying out the image coding of an obtained iced conductor image, and converting the conductor and icing characteristic parameters into a two-dimensional image matrix under a unified scale; extracting high-dimensional structural features from the obtained two-dimensional image matrix through the constructed image modeling network, and converting the extracted high-dimensional structural features into aerodynamic parameter vectors through a nonlinear mapping function; and coupling the aerodynamic parameter vector with the dynamic parameters of the conductor structure, constructing a nonlinear coupled vibration system, and obtaining galloping response characteristics under different icing forms and environmental conditions based on time domain integration and multi-mode response analysis. Compared with traditional wind tunnel or complex flow field simulation, the modeling efficiency and practicability of the wind-induced response characteristics of the wire under the variable icing condition are remarkably improved, and good engineering adaptability and popularization value are achieved.

The application relates to the field of non-contact monitoring of overhead transmission lines, and particularly provides a method and device for identifying the galloping mode of a transmission line based on magnetic field induction. The method comprises the following steps: obtaining the initial magnetic induction intensity of a magnetic dipole in each direction in a space coordinate system when a target overhead conductor gallops; wherein the initial magnetic induction intensity is measured by two magnetic induction sensors above the target overhead conductor; inversely calculating the conductor movement by using a nonlinear optimization method according to the magnetic induction intensity in each direction; wherein the conductor movement comprises the vertical displacement and the torsion angle of the target overhead conductor; and identifying the target mode of the target overhead conductor galloping by using a random subspace method based on the vertical displacement and the torsion angle. The technical scheme provided by the application can improve the accuracy of the galloping mode identification of the transmission line to a certain extent.

The utility model relates to the technical field of power transmission line monitoring, in particular to a power transmission line conductor galloping monitoring device which comprises a data acquisition unit, the data acquisition unit comprises a monitoring end and an installation end, the installation end comprises an installation column fixedly installed on the lower surface of the monitoring end, and a sliding seat is installed on the surface of the installation column in a sliding mode. A through opening is formed in the side face of the sliding seat, a positioning plate is slidably connected to the inner wall of the through opening, a slope groove is formed in the lower surface of the positioning plate, a moving block is fixedly connected to the upper surface of the positioning plate, a moving groove is formed in the inner top wall of the through opening, and the surface of the moving block is in lap joint with the inner wall of the moving block. According to the utility model, the positioning plate is arranged, the inclined plane groove below the positioning plate is utilized, the positioning plate can be automatically opened, the moving block and the reset spring are arranged, the positioning plate can return after being opened, a data acquisition unit can be conveniently clamped with a circuit, and compared with the existing manual installation of a positioning assembly below the positioning plate, the operation is more convenient.

The invention provides a conducting wire galloping monitoring method and system based on Beidou radar space-time calibration, and belongs to the technical field of conducting wire monitoring, the monitoring method is applied to a monitoring system comprising a data acquisition module, a data processing module and a conducting wire galloping monitoring module, and the monitoring method specifically comprises the following steps: synchronously acquiring Beidou positioning data and radar ranging data; obtaining multi-source fusion data of conductor galloping in combination with space-time calibration; layered error compensation is carried out on the multi-source fusion data in sequence through third-order galloping compensation; performing atmospheric delay error correction on the multi-source fusion data after the third-order compensation according to double-grid fusion correction; and solving a conductor galloping track according to the corrected multi-source fusion data in combination with a historical galloping mode and conductor physical parameters. Multi-source data fusion is realized through space-time calibration, sensor hardware inherent errors in multi-source fusion data and errors caused by environmental interference are compensated by further combining third-order galloping compensation and double-grid fusion correction, and conductor galloping monitoring accuracy is guaranteed.

The invention belongs to the technical field of bundled conductor galloping suppression of a power system, and particularly relates to a mounting method and a lock catch structure of a bundled conductor galloping suppression self-locking device suitable for an unmanned aerial vehicle, the lock catch structure comprises a lock catch body, an adjusting unit and a self-locking unit, and one side of the lock catch body is provided with an opening; a wire containing space is formed in the lock catch body, the adjusting unit is arranged in the containing space and comprises a plurality of clamping pieces which are distributed on the periphery of a wire and used for clamping the wire in a self-adaptive mode and can move in a telescopic mode and a plurality of sensors in signal connection with the clamping pieces, and the self-locking unit is arranged at the position of an opening. And the locking mechanism is used for locking the opening in a closed manner or unlocking the opening in an opened manner. The device is compact in structural design, rapid in installation and high in reliability, can effectively prevent the bundled conductors from galloping, and effectively solves the problems that in the prior art, galloping suppression installation is low in efficiency, and hooks are insufficient in firmness and applicability.

The invention relates to a conductor galloping early warning method based on spacer tracking detection, and the method comprises the steps: collecting spacer data of a power transmission line, carrying out the preprocessing of the data, and forming a data set of the spacer of the power transmission line through the preprocessed data; the YOLOv8 model is improved and trained, the trained model is used to carry out target detection on the spacer in each frame of the power transmission line image, and a detection result is obtained; obtaining a motion trail; track management is carried out; and judging whether the wire is galloped or not, and if so, generating early warning information. According to the method, a power transmission line spacer data set is constructed through data labeling and data enhancement, a YOLOv8 target detection network is trained to effectively identify spacers in a power transmission line image, and target tracking is performed on the identified spacers; target association is carried out through Kalman filtering and a Hungary algorithm, a target trajectory is managed through an ReID module, and galloping judgment is carried out according to the trajectory and a preset threshold, so that high efficiency and real-time performance of conductor galloping early warning monitoring can be ensured.