Synchronization-based homogeneous-sensor mutation parameter recognizing method and device

Abstract

The present invention relates to a synchronization-based homogeneous-sensor mutation parameter recognizing method and device. A point value is extracted from each time point of each periodic sequence to form a one-dimensional data sequence which is measured by a single sensor for many times, and a periodically-synchronized periodic data sequence is constructed. Preprocessing of obtained data samples is carried out based on maximum likelihood estimation. Empirical mode decomposition is performed on mutation-containing sensor signals based on combined preprocessing to obtain IMF mode components. Hilbert-Huang transform of the signal-dominated IMF component is conducted to obtain an instantaneous frequency diagram and an instantaneous amplitude diagram. According to feature information of a mutation point, amplitude change and instantaneous frequency trend in an HHT chart, parameter detection and recognition are carried out for sensor abnormal signals. In the invention, indiscriminate fusion of different types of sensors is conducted to obtain isochronal data samples, the difference among different sensors and random errors in the signal acquisition process are reduced, and the accuracy of sensor mutation parameter identification is improved.

Description

technical field [0001] In the research of the present invention, the homogeneous sensor signals commonly used in electric equipment are taken as the object, and after studying the fusion process of the electrical data measured by the sensor and providing the engineering calculation and realization method, an effective method for detecting and identifying the mutation parameter of the identification sensor is given. method. Background technique [0002] On the one hand: the real-time perception of the effective power supply capacity of the power grid by electrical equipment is the basis for orderly power consumption, and the real-time status of power consumption of electrical equipment by the grid is the premise of a smart grid. Traditional power supply and consumption information collection is often performed by a single Even if multiple (types) of sensors are used, they are mostly used in time-sharing, so the information of the power grid is reflected in isolation from mult...

AI Technical Summary

Problems solved by technology

Due to the individual differences of different sensors and random errors in the signal acquisition process, it is difficult to detect and identify massive data from homogeneous sensors, the data quality is poor, and the identification accuracy of sensor mutation parameters is low.

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