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An evaluation method of industrial process voltage sag interruption probability based on analytic hierarchy process

An AHP, voltage sag technology, applied in data processing applications, instruments, calculations, etc., can solve problems such as poor evaluation results, single evaluation method hierarchy, and no consideration of the degree of impact.

Active Publication Date: 2020-12-29
GUANGDONG POWER GRID CO LTD +1
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Problems solved by technology

[0004] The present invention provides a method based on analytic hierarchy process (AHP) to overcome the defects in the above-mentioned prior art that the evaluation method of the industrial process interruption probability does not consider the degree of influence of different links on the industrial process, the evaluation method has a single hierarchical structure, and the evaluation effect is too poor. Evaluation Method of Interruption Probability of Voltage Sag in Industrial Process

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  • An evaluation method of industrial process voltage sag interruption probability based on analytic hierarchy process
  • An evaluation method of industrial process voltage sag interruption probability based on analytic hierarchy process
  • An evaluation method of industrial process voltage sag interruption probability based on analytic hierarchy process

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Embodiment 1

[0069] Glossary:

[0070] Voltage dips:

[0071] It is defined in the IEEE standard as: the effective value of the power frequency voltage at a certain point in the power supply system suddenly drops to 10%-90% of the rated value, and returns to normal after a short duration of 10ms-1min.

[0072] Short power interruptions:

[0073] It is defined in the IEEE standard as a short-term voltage change with a duration of 10ms-3s when one or more phases of voltage in the power supply system are completely lost (less than 0.1 per unit value).

[0074] Sensitive device:

[0075] Electrical equipment susceptible to voltage sags, short interruptions, and voltage swells, usually considered computers (personal computers, PCs), programmable logic controllers (PLCs), adjustable speed drives (adjustable speeddrives, ASD) and AC contacts The active current contactor (ACC) is a typical sensitive device.

[0076] ITIC and CBEMA curves:

[0077] The American Computer and Business Equipment ...

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Abstract

The invention discloses an industrial process voltage sag interruption probability evaluation method based on an analytic hierarchy process. The industrial process voltage sag interruption probabilityevaluation method comprises the following steps: acquiring original voltage temporary data, and if the original voltage temporary data is a three-phase unbalanced voltage temporary data, converting the three-phase standardization of the original voltage temporary data into a three-phase balanced temporary data; carrying out voltage transient fault probability evaluation calculation on sensitive equipment in an area with uncertain equipment voltage endurance capability by utilizing the three-phase balance voltage transient data; correcting the fault probability to obtain equipment voltage temporary fault probability based on redundancy; correcting the equipment voltage temporary fault probability based on redundancy to obtain a link interruption probability; and determining importance proportions of different links according to the link outage probabilities, establishing a comparison matrix, calculating weights of different links by utilizing the comparison matrix, and performing weighted summation on the link outage probabilities to obtain a process voltage temporary outage probability. According to the industrial process voltage sag interruption probability evaluation method, thelink temporary interruption probability is introduced into the industrial process voltage temporary interruption probability evaluation, so that the evaluation accuracy is improved.

Description

technical field [0001] The present invention relates to the technical field of electric power system control, and more specifically, relates to a method for evaluating the interruption probability of industrial process voltage sags based on the Analytic Hierarchy Process. Background technique [0002] With the rapid development of technology, many sensitive devices are integrated into the public power grid, and the power quality of the power grid, especially the dynamic power quality of the power grid, is seriously degraded. This problem has attracted widespread attention of experts and scholars at home and abroad. Sensitive loads are very sensitive to power quality disturbances such as voltage sags, voltage swells, and short-term interruptions. The failure of a single device or component may scrap the products of the entire production line, causing huge economic losses. [0003] At present, most industrial processes are composed of sensitive components such as microelectron...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06Q10/06G06Q50/06
CPCG06Q10/0639G06Q50/06
Inventor 蔡日王庆斌黄辉李钙王余熙赵宪中李晓阳邵彬
Owner GUANGDONG POWER GRID CO LTD
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