3results about How to "Improve line selection accuracy" patented technology

The invention belongs to the technical field of wind power generation. The invention provides a wind power plant road line selection method and system, a medium, a program product and equipment, and the method comprises the steps: inserting a plurality of vertexes between a starting point and a target point according to the map data of a target wind power plant to obtain a plurality of road sections; according to the road construction cost, the road longitudinal slope coefficient, the road longitudinal slope gradient, the road turning radius coefficient, the road earthwork cost coefficient, the filling amount, the excavation amount, the unit excavation cost and the unit filling cost of each road section, an objective function of the weighted road construction total cost is constructed; and performing optimization by minimizing the objective function to obtain a wind power plant road optimal line selection result. According to the method, under the constraint conditions of the maximum gradient, the minimum turning radius and the like, line selection arrangement is automatically carried out by taking the total construction cost of the wind power plant road as an optimization target, and the optimal scheme of the wind power plant road can be obtained more efficiently and more precisely.

The invention relates to the technical field of small-current grounding line selection, and discloses a small-current grounding line selection method and system based on a CatBoost algorithm, and the method comprises the steps: firstly, collecting the zero-sequence voltage and zero-sequence current of each line through a data collection splitter, and transmitting the collected data to a line selection host through the data collection splitter; the line selection host trained by the CatBoost algorithm selects a faulty line according to the collected data, the data collection splitter preprocesses the collected data, converts a collected analog signal into a digital signal, and transmits the digital signal to the line selection host through an optical fiber. Data of various identification methods such as amplitude comparison and phase comparison, first half wave, power direction and higher harmonic are fused together, the fused data drive a fault line selection model, fault information in multiple aspects is fully utilized, various line selection criteria are integrated and complemented and fused with one another, the fault judgment capability is improved, and the method has wider adaptability.

This invention discloses a method for fault location in distribution networks based on multi-criteria fusion and matrix topology search, relating to the field of distribution network fault detection technology. The method includes: synchronously collecting zero-sequence voltage and current at the distribution network bus and zero-sequence current information of each outgoing line; determining whether a single-phase grounding fault has occurred by calculating the magnitude of the neutral point zero-sequence voltage; constructing a steady-state line selection criterion, and simultaneously constructing a transient line selection criterion using an adaptive window S-transform, thus constructing a comprehensive line selection criterion, identifying lines with values ​​greater than a selection threshold as faulty lines; improving the features extracted from line selection to construct transient steady-state criteria for node classification, and then constructing a comprehensive node classification criterion, identifying nodes with values ​​greater than a threshold in the comprehensive criterion as faulty nodes; finally, based on the node classification results, sequentially constructing a network topology matrix, a node classification matrix, a fault path matrix, and a fault judgment matrix; and achieving accurate location of the fault section by querying the corresponding elements in the fault judgment matrix.