Method for early warning of sensitive client electric energy experience quality under voltage dip disturbance

A technology of voltage sag and quality of experience, applied in the field of electric power, can solve the problems of huge risks and economic losses in power use of sensitive customers, and achieve the effect of reducing power supply and utilization risks and accurately monitoring

Inactive Publication Date: 2014-01-01
SHENZHEN POWER SUPPLY BUREAU +1
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Problems solved by technology

The objective existence of power quality problems and the sensitive characteristics of sensitive loads lead to huge risks in...

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  • Method for early warning of sensitive client electric energy experience quality under voltage dip disturbance
  • Method for early warning of sensitive client electric energy experience quality under voltage dip disturbance
  • Method for early warning of sensitive client electric energy experience quality under voltage dip disturbance

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Embodiment Construction

[0037] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0038] Such as figure 1 As shown, it is a schematic flow chart of Embodiment 1 of an early warning method for sensitive customer power experience quality under voltage sag disturbance of the present invention, which mainly includes the following steps:

[0039] Step 100, based on the S-transform fast algorithm and the incremental SVM classifier, automatically identify the voltage sag disturbance of sensitive customers;

[0040] Step 101, based on the result of the identification of the voltage sag disturbance, determine the voltage tolerance curves of the equipment corresponding to several types of sensitive customers under different load levels;

[0041] Step 102, according to the historical monitoring data of the voltage sag disturbance as a sample, convert the sample values ​​of the amplitude severity index MSI and the duration severity in...

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Abstract

The invention provides a method for early warning of sensitive client electric energy experience quality under the voltage dip disturbance. The method comprises the steps that based on the S conversion rapid algorithm and an increment SVM classifier, voltage dip disturbances of sensitive clients are automatically identified; based on identification results of the voltage dip disturbances, voltage tolerance curves of devices corresponding to multiple types of sensitive clients at different load levels are determined; historical monitoring data of the voltage dip disturbances serve as samples, the samples are converted into sample values of a voltage dip amplitude ponderance index MSI and a lasting time ponderance index DSI, a probability density function of the MSI and the DSI is determined on the basis of the maximum entropy principle, the sensitive device fault probability is evaluated, and the probabilities of the sensitive devices corresponding to the sensitive clients at the voltage dip level are obtained. By the adoption of the method for early warning of sensitive client electric energy experience quality under the voltage dip disturbance, the electric energy quality disturbance condition can be accurately monitored, whether a client load is influenced by the disturbance or not is determined according to the load sensitivity degree of each client, and potential risks of load operation are found.

Description

technical field [0001] The invention relates to the field of electric power technology, in particular to a method for early warning of power experience quality of sensitive customers under voltage sag disturbance. Background technique [0002] In recent years, with the development of modern industry and economy, sensitive loads such as computers and power electronic equipment have been widely used in various industries, causing power customers to be very sensitive to voltage sags, voltage swells, and short-term interruptions. Or the failure of components may cause great economic losses. On the other hand, some fluctuating or impact loads such as electric arc furnaces, rectifiers, single-phase loads, and high-power motors are incorporated into the grid, especially the injection of a large number of harmonic and sub-harmonic components, resulting in voltage and current waveforms in the grid Seriously distorted. In addition, some external factors such as lightning, external f...

Claims

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Application Information

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IPC IPC(8): G01R31/00G01R31/02
Inventor 张华赢曹军威高田王淼史帅彬姚森敬段绍辉余鹏卢旭黄志伟
Owner SHENZHEN POWER SUPPLY BUREAU
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