Voltage disturbance monitoring model construction method and application thereof

A technology of voltage disturbance and construction method, which is applied in the direction of measuring electricity, measuring devices, measuring electrical variables, etc., to achieve the effects of reducing adverse effects, good time-frequency resolution, and high detection accuracy

Pending Publication Date: 2022-04-08
NANYANG POWER SUPPLY COMPANY OF STATE GRID HENAN ELECTRIC POWER
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current power quality analysis application is facing new challenges in data acquisition, modeling analysis, application, etc.

Method used

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Embodiment 1

[0023] Embodiment 1: A method for building a voltage disturbance model, comprising the following steps:

[0024] Obtaining voltage monitoring data corresponding to a single voltage disturbance type;

[0025] Using a fixed time and long time window to continuously intercept the voltage monitoring data to obtain a plurality of short-term stable voltage data packets, and use time domain-frequency domain transformation to process the short-term stable voltage data packets to obtain voltage frequency domain data of corresponding periods;

[0026] Using a principal component analysis algorithm to process the voltage frequency domain data to obtain frequency dimensionality reduction data;

[0027] A classifier is used to classify the frequency dimensionality reduction data, and a matching model of the voltage frequency domain feature and a voltage disturbance type is constructed, and the matching model is the voltage disturbance model.

[0028] Preferably, after the voltage monitori...

Embodiment 2

[0031] Embodiment 2: the application of the voltage disturbance model in embodiment 1, comprises the following steps:

[0032] Continuously intercepting working condition voltage monitoring data output by the voltage monitoring device using a fixed time and long time window to obtain working condition voltage data packets, and using time domain-frequency domain transformation to process the working condition voltage data packets to obtain working condition voltage frequency domain data;

[0033] Using a principal component analysis algorithm to process the working condition voltage frequency domain data to obtain working condition frequency dimensionality reduction data;

[0034] According to the acquisition order of the working condition voltage data packets, the working condition frequency dimensionality reduction data is sequentially input to the voltage disturbance model, and the voltage disturbance model outputs corresponding voltage disturbance information.

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Abstract

The invention relates to a voltage disturbance model construction method. The method comprises the following steps: acquiring voltage monitoring data corresponding to a single voltage disturbance type; continuously intercepting the voltage monitoring data by using a fixed-time-length time window to obtain a plurality of short-time stable voltage data packets, and processing the short-time stable voltage data packets by using time domain-frequency domain transformation to obtain voltage frequency domain data of a corresponding time period; processing the voltage frequency domain data by using a principal component analysis algorithm to obtain frequency dimension reduction data; and using a classifier to classify the frequency dimension reduction data, and constructing a matching model of the voltage frequency domain characteristics and the voltage disturbance type, the matching model being the voltage disturbance model. According to the invention, the timeliness and accuracy of voltage disturbance monitoring can be improved.

Description

technical field [0001] The invention relates to the technical field of grid voltage monitoring, in particular to a method for building a voltage disturbance model and its application. Background technique [0002] The loads connected to the power grid include a large number of nonlinear, fluctuating and impacting loads, such as distributed photovoltaics, wind power, electric vehicle charging piles and other power quality interference source users, which will cause waveform distortion of the power supply system, causing harmonics and voltage fluctuations , Three-phase imbalance and a series of power quality problems. The increasingly prominent power quality problems have caused huge economic losses to sensitive users represented by microelectronics, semiconductors, and biomedicine. [0003] Improving and solving the problem of power quality disturbance usually starts with the monitoring waveform data recorded by the power quality monitoring device, analyzes its cause of occu...

Claims

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Application Information

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IPC IPC(8): G01R31/00G01R19/25
Inventor 罗道军薛宇张震闫奇王志方张泽中肖旭文
Owner NANYANG POWER SUPPLY COMPANY OF STATE GRID HENAN ELECTRIC POWER
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