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Electric signal anomaly detection method, device and apparatus

An anomaly detection and electrical signal technology, applied in the direction of measurement devices, circuit devices, periodic selective voltage/current level measurement, etc., can solve problems such as poor reliability

Inactive Publication Date: 2019-11-12
HANGZHOU VANGO TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of this, the object of the present invention is to provide a method, device, and equipment for detecting electrical signal anomalies, which overcome the defect of poor reliability in detecting abnormal events in the power grid in the prior art

Method used

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  • Electric signal anomaly detection method, device and apparatus
  • Electric signal anomaly detection method, device and apparatus
  • Electric signal anomaly detection method, device and apparatus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Please refer to figure 1 , figure 1 It is a flow chart of an electrical signal abnormality detection method provided by an embodiment of the present invention.

[0053] The method includes:

[0054] S101: Sampling a unit sampling interval in the electrical signal to obtain a sampling value.

[0055]Specifically, the electrical signal is obtained from the power grid to be detected. This embodiment does not limit the frequency of obtaining the electrical signal. For example, the electrical signal can be obtained from the power grid to be detected in real time; Signal. The electrical signal may be a voltage signal of the power grid to be detected, or a current signal of the power grid to be detected. The electrical signal is sampled according to a preset unit sampling interval. The unit sampling interval is set to determine the length of each sampling interval, and its size is a positive integer multiple of half the fundamental period. The specific size of the unit sa...

Embodiment 2

[0067] Based on Embodiment 1, in the process of obtaining the electrical signal of the power grid to be detected, the original electrical signal can be obtained first, and then the original parameter waveform can be properly processed to obtain the electrical signal, so that after sampling the electrical signal, it is more convenient and quick to judge the sampling Whether the point is an abnormal sampling point.

[0068] For details, please refer to figure 2 , figure 2 The flow chart of another electrical signal anomaly detection method provided by the embodiment of the present invention includes:

[0069] S201: Obtain an original electrical signal, filter out a DC component in the original electrical signal, and obtain a sinusoidal AC component.

[0070] Specifically, the sensor is used to acquire the original electrical signal on the power grid to be detected, and the original electrical signal may be a current signal or a voltage signal. Depending on the original elec...

Embodiment 3

[0076] Based on Embodiment 1 and Embodiment 2, after judging whether the number of consecutive abnormal intervals is greater than the abnormal interval threshold, the sampling value and the highest threshold and the lowest threshold of the threshold interval can be further used to judge the type of electrical signal anomaly, that is, the abnormal occurrence of the power grid to be detected The kind of event for subsequent actions.

[0077] For details, please refer to Figure 4 , Figure 4 The flow chart of another electrical signal anomaly detection method provided by the embodiment of the present invention includes:

[0078] S301: Determine whether the number of consecutive abnormal intervals is greater than an abnormal interval threshold.

[0079] The number of consecutive abnormal intervals is compared with the threshold of abnormal intervals. When the number of consecutive abnormal intervals is less than the threshold of abnormal intervals, this embodiment does not limi...

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Abstract

The invention discloses an electric signal anomaly detection method comprising the following steps: sampling a unit sampling interval in an electric signal to obtain a sampling value; counting anomalous sampling points with the sampling value outside a threshold interval corresponding to the electric signal to obtain anomalous point number in the unit sampling interval; determining the unit sampling interval with the anomalous point number larger than the anomalous point threshold value as an anomalous sampling interval, and counting the continuous anomalous sampling intervals to obtain a continuous anomalous interval number; when the number of the continuous anomalous intervals is larger than the anomalous interval threshold value, determining that anomaly happens to the electric signal.According to the method in the invention, the defect that in the prior art, the reliability is poor when the power grid anomalous event is detected is overcome; in addition, the invention further provides an electric signal anomaly detection device and apparatus, which have the same beneficial effects mentioned above.

Description

technical field [0001] The invention relates to the field of detection of abnormal events in power grids, in particular to a method, device and equipment for detecting abnormal electrical signals. Background technique [0002] With the concept of the Ubiquitous Power Internet of Things and the construction of the Ubiquitous Power Internet of Things, each data acquisition device in the power system, as a sensor node of its perception layer, must have the basic detection function for abnormal events in the power grid. [0003] The electrical signals in the power grid, that is, the voltage signal and the current signal, as the original data in the power grid, have the characteristics of easy acquisition, processing and calculation, and are especially suitable for monitoring abnormal events such as overvoltage, overcurrent, undervoltage and undercurrent in the power grid. detection. The existing detection method is to sample the processed voltage signal or current signal and co...

Claims

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Application Information

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IPC IPC(8): G01R31/02G01R19/165
CPCG01R19/16571G01R19/16576G01R19/1659G01R19/2513H02J3/0012G01R19/0015G01R19/225G01R31/00G16Y40/10
Inventor 吴博强谭年熊门长有
Owner HANGZHOU VANGO TECH
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