10 results about "Equipotential" patented technology

The equal-potential grounding grid anomaly detection method based on dynamic weighted Mahalanobis distance provided in the application relates to the technical field of power system safety monitoring. The method collects current data of each monitoring point to establish a time series data set, uses the 2 sigma criterion to clean up the data and calculate the relative deviation rate, eliminates the dimension difference through normalization, designs fluctuation weight coefficient, single-point abnormality variable weight coefficient and global same-direction attenuation weight coefficient to construct a composite weight system, and combines iterative optimization to determine a dynamic threshold, so as to realize accurate identification of the abnormal state of the grounding grid. The application can effectively distinguish normal load fluctuation from a real abnormal state, and improve the accuracy and reliability of the grounding grid anomaly detection.

A layout design support apparatus 100 determines, in a circuit element connected to a first external terminal P1 to which a first potential identification label is added, whether to short-circuit one terminal connected to the first external terminal P1 and another terminal based on a determination criterion according to element type information and breakdown voltage information, adds the first potential identification label to the circuit components on a path from the first external terminal P1 to the one terminal of the circuit element to identify a first equipotential region according to determining not to short-circuit, repeatedly performs determination for the circuit element connected to the another terminal and identifies the first equipotential region according to determining to short-circuit, and identifies a second equipotential region when receiving a second potential identification label to be added to a second external terminal P2.

The invention discloses a roadway advanced detection method, device and system, and a storage medium. The method comprises the following steps: S1, arranging four point power supplies; s2, when power is supplied to each point power supply, the potential difference between M and N is observed, equipotential bodies corresponding to observation points during power supply of each point power supply point are calculated, and intersection positions of spherical shells of the equipotential bodies at different positions of the heading head are obtained by intersecting the equipotential bodies; and meanwhile, different directions, positions and properties of the abnormal body are determined by analyzing the synchronism of the abnormal high resistance and the abnormal low resistance at the intersection positions. By adopting the technical scheme of the invention, the direction and the accurate position of an abnormal source can be distinguished, and the drilling cost, misjudgment and multiplicity of solutions are reduced.

The invention discloses an equipotential operation optimal path planning method based on multi-condition constraint optimization of point cloud data, and relates to the technical field of electric power hot-line operation path planning and intelligent optimization, and the method comprises the steps: carrying out the semantic segmentation and lead catenary fitting of the point cloud data through a deep learning model; constructing a three-dimensional working environment model with an uncertainty field; constructing geometric, electrical, wind swing and uncertainty risk fields based on multi-source data, and establishing a deviation cost function of an empirical path; and iteratively generating an equipotential operation optimal path plan under an objective function of risk cost, availability score and path deviation degree by adopting a path search algorithm based on ant colony optimization. According to the method disclosed by the invention, by adopting a path search algorithm based on ant colony optimization, an equipotential operation optimal path is iteratively generated under an objective function of risk cost, availability score and path deviation degree, and dynamic optimal path solving under a multi-constraint condition is realized.

The invention discloses a three-dimensional point cloud-based equipotential hot-line work path planning method, system, equipment and medium, and the method comprises the following steps: obtaining three-dimensional point cloud data of a hot-line work site, carrying out the preprocessing of the three-dimensional point cloud data, and constructing a three-dimensional work scene model; establishing a human body three-dimensional model of an operator, and determining a motion range of equipotential operation according to the operation task; based on the three-dimensional operation scene model and the human body three-dimensional model, calculating safety evaluation parameters of a plurality of calculation position points in the motion range; an ant colony algorithm is adopted, the safety evaluation parameters serve as an optimization target, and the optimal entering path from the initial position to the equipotential operation target position is searched in the movement range; and outputting the optimal entering path and the coordinate information along the path. By acquiring the three-dimensional point cloud data of the operation site and constructing the high-precision operation scene model, the problem of low precision caused by the fact that a traditional method only depends on a two-dimensional plane or a simplified model is solved.

The invention belongs to the technical field of high-voltage electrical test and detection, and relates to a disc insulator alternating-current voltage-withstanding multichannel leakage current detection method and system, and the method comprises the steps: setting a parameter set which comprises voltage-withstanding voltage, frequency, voltage boosting and stabilizing strategies, sampling parameters, a judgment threshold value and a consistency threshold value, and generating a version identifier; constructing an equipotential boundary and a voltage-sharing electrode, and organizing the high-voltage end of the insulator to be measured, an independent measurement loop and a common grounding reference point; during the voltage boosting and stabilizing period, synchronously sampling each loop to obtain a multi-channel sequence; filtering and windowing the sequence to obtain an effective value and a stability index; channel calibration compensation is carried out, and a consistency index is calculated; and in combination with a threshold value, grounding and communication state output judgment and event marks, voltage reduction or cut-off is carried out during triggering, and structured evidence storage is carried out. The technical scheme of the invention is suitable for alternating current withstand voltage batch detection, and can realize judgment robustness and channel consistency control.

The present invention relates to the technical field of power transmission lines. Disclosed are a point cloud data-based strong electric field equipotential calculation method and system. The method comprises: preprocessing spatial position information of a power line; establishing a three-dimensional operator model, and obtaining a distribution point on the surface of the human body; establishing a 2D equipotential surface; constructing a TIN grid and obtaining a three-dimensional equipotential surface; and placing the operator model in a strong electric field area, and evaluating the influence of an strong electric field on the human body. In the present invention, point cloud data is used to implement strong electric field equipotential calculation, so that the potential change of the human body in operation can be displayed more clearly during live-line operation and the like; and finally, whether there is any danger, whether moving paths are reliable, and whether measures are adopted are determined by means of scientific and quantitative analysis, so as to further guarantee the safety of operators during high-voltage live-line operation.

The present application provides a method, device, equipment and storage medium for analyzing the transient process of a grounding grid. The method includes obtaining parameter information of soil, a main grounding grid and a secondary equipotential grounding grid, and constructing a transient process analysis model of a grounding grid including a non-ideal earth. The method determines the maximum frequency of the transient current and calculates the minimum wavelength, thereby dividing the main grounding grid and the secondary equipotential grounding grid into multiple segments with a length not exceeding one-sixth of the minimum wavelength to ensure the accuracy of the analysis. Then, the model parameters are set based on the segmentation and parameter information, the transient current at the preset observation point is obtained, and fast Fourier decomposition is performed on it to convert it into a frequency domain waveform. Representative frequency points are selected for excitation to obtain the transient response characteristics in the frequency domain, and then the time domain transient waveform of the observation point is calculated by inverse Fourier decomposition, and finally the transient process characteristics of the grounding grid are determined. This method improves the accuracy of the transient process analysis of the grounding grid through refined modeling and segmented processing.