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Voltage sag evaluation process based on matrix factor

A voltage sag, matrix factor technology, applied in electrical components, circuit devices, AC network circuits, etc., can solve problems such as inability to meet needs, mixed ideas, consideration and interference, and calculations

Inactive Publication Date: 2015-01-21
ELECTRIC POWER RES INST STATE GRID SHANXI ELECTRIC POWER +1
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  • Claims
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Problems solved by technology

However, in this whole process, human thoughts, considerations and interventions are required
At the same time, it cannot use a computer to calculate, and cannot conduct a comprehensive and accurate analysis of a large industrial process
This method can no longer meet the needs of modern analytical methods

Method used

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  • Voltage sag evaluation process based on matrix factor
  • Voltage sag evaluation process based on matrix factor
  • Voltage sag evaluation process based on matrix factor

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Embodiment Construction

[0024] The invention establishes a process for assessing the voltage sag loss based on matrix factors, and provides a set of quantifiable, flexible and general-purpose calculation methods suitable for the assessment of the voltage sag. This method uses the method of applying the probability matrix to process the data related to voltage sags, and obtains the number of annual voltage sags.

[0025] A voltage sag economic evaluation method based on a cost factor matrix mainly includes the following steps:

[0026] S1) Determine the voltage sag evaluation object, measure and count the PCC node voltage sag data;

[0027] S2) Analyze and sort out the measured and statistical data of voltage sags, and establish a voltage sag sensitivity matrix and an annual voltage sag frequency matrix;

[0028] S3) Calculate the annual voltage sag frequency and occurrence times at the nodes.

[0029] In the method, in step S1, it is necessary to monitor the power quality data of the PCC node, wher...

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Abstract

The invention provides a voltage sag evaluation process based on a matrix factor. The process includes the steps that (S1) a voltage sag evaluation object is determined, and voltage sag data of a common coupling node of the voltage sag evaluation object are measured; (S2) the voltage sag data are analyzed and sorted, and a voltage sag sensitivity matrix and a voltage sag frequency matrix are built; (S3) a voltage interruption frequency matrix on the common coupling node is computed, and voltage interruption times are obtained through the voltage interruption frequency matrix. By means of the process, actual conditions of equipment when voltage sag occurs during operation of a system can be truly reflected, and the process is suitable for computer processing.

Description

technical field [0001] The invention belongs to the field of power quality, and in particular relates to a matrix factor-based voltage sag evaluation process. Background technique [0002] With the popularization of switching equipment based on high-power power electronics and the technological update of electrical equipment, especially numerical control technology is widely used in industrial production, the harm caused by poor power quality is becoming more and more obvious. According to the report of the international conference, at present, in the United States, due to the decline of power quality, the annual loss is 13.3 billion US dollars. The huge economic loss caused by poor power quality makes people pay more and more attention to it. [0003] Like other power quality issues, voltage sags are not a new problem. In recent years, with the wide application of various sensitive electrical equipment in industry (especially industrial process control), power quality dist...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00
CPCH02J3/00G06Q50/06
Inventor 王金浩徐龙雷达杨超颖王康宁仇汴宋述勇杜杰吴玉龙杜慧杰李胜文李慧蓬张敏肖楚鹏向洁陈小飞黄静邱泽晶
Owner ELECTRIC POWER RES INST STATE GRID SHANXI ELECTRIC POWER
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