Partial discharge positioning method based on SA-APSO and dimensionality reduction projection dynamic contraction circle

Abstract

The invention discloses a partial discharge positioning method based on SA-APSO and a dimensionality reduction projection dynamic contraction circle, and experiment test is performed on a transformeras an example. The method concretely includes the following steps: first simulation test is performed on a simulation annealing adaptive mixing particle swarm algorithm, the effectiveness of the extracted data is proved, then multiple groups of transformer actual measurement data are extracted by utilizing the algorithm aiming at the same partial discharge point, partial discharge spot projectionand cluster processing are performed, and the plane partial discharge source is obtained; finally, the obtained plane partial discharge source result after mean value processing regresses to the spacequantity, and the final value is the partial discharge point. The method has the beneficial technical effects of large sample number, high precision of partial discharge source positioning, high stability of partial discharge source positioning, smaller error, and more accuracy fault locating and prediction and the like; and the accuracy reference is provided for the positioning measuring and calculating of partial discharge of high pressure device in engineering reality.

Description

technical field [0001] The invention belongs to the technical field of high-voltage equipment insulation in power systems, and in particular relates to a partial discharge positioning method based on SA-APSO and dimensionality reduction projection-dynamic contraction circle. Background technique [0002] The operating status of power equipment directly affects the stable operation of the entire power grid. Existing power equipment is prone to insulation defects during production, assembly and operation, resulting in equipment failure. Partial discharge (PD) is not only an important cause of insulation faults, but also the main means of evaluating the degree of insulation degradation. Therefore, for on-site power equipment, obtaining the specific location of PD will help improve the efficiency and safety of power grid operation. [0003] Due to the complex propagation path between the PD source and the sensor, there are problems such as signal attenuation and low detection s...

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Problems solved by technology

[0008] Aiming at the problems of low positioning accuracy and poor stability of the existing partial discharge positioning methods and the superposition of multiple errors brought about by the single sample data mode that is often used, the present invention proposes a dynamic contraction circle based on SA-APSO and dimensionality reduction projection Partial discharge localization method

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