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Voltage sag assessment method based on process immunization uncertainty

A voltage sag and sub-process technology, applied in the field of voltage sag evaluation based on process immunity uncertainty, can solve the problems of no effective description of logical relationship and inaccurate evaluation, so as to improve the probability of interruption and solve the problem of inaccurate description , the effect of improving the evaluation accuracy

Inactive Publication Date: 2017-02-08
STATE GRID SICHUAN ECONOMIC RES INST +1
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Problems solved by technology

[0005] The purpose of the present invention is to overcome the fact that the existing technology does not effectively describe the logical relationship between the structure and function of each production process of the industrial process and its equipment, and the prior art cannot accurately evaluate the equipment failure under the parallel relationship problem, to provide an evaluation method based on process immune uncertainty, which has narrowed subjective errors and accurately evaluates the impact of voltage sag on industrial processes

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  • Voltage sag assessment method based on process immunization uncertainty
  • Voltage sag assessment method based on process immunization uncertainty
  • Voltage sag assessment method based on process immunization uncertainty

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Embodiment Construction

[0031] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. However, it should not be understood that the scope of the above subject matter of the present invention is limited to the following embodiments, and all technologies realized based on the content of the present invention belong to the scope of the present invention.

[0032] In the field of electrical energy measurement, the process immunity time is defined as the time during which the physical parameters of the industrial process exceed the allowable limit value after being subjected to a voltage sag of a given magnitude. Such as figure 1 shown, where P limit is the critical value of physical parameters; P nom is the rated value of the physical parameter; t 1 , t 1 +Δt and t 2 They are the initial moment when the sensitive process experiences a voltage sag, the moment when the physical parameter deviates from the rated value, and...

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Abstract

The invention relates to the field of electric energy quality risk assessment or analysis, and especially relates to a voltage sag assessment method based on process immunization uncertainty. The method gives full consideration to the process immunization time uncertainty, combines with the actual technological requirements of industrial production, and effectively measures the response characteristics of voltage sag in different industrial processes. Meanwhile, the method proposes a parameter out-of-limit severity index, combines with the maximum entropy theory to evaluate the out-of-limit probability of physical parameters in an industrial process, can improve the evaluation process of outage probability of an industrial process under the given voltage sag to greater degree.

Description

technical field [0001] The invention relates to the field of power quality risk assessment or analysis, in particular to a voltage sag assessment method based on process immunity uncertainty. Background technique [0002] As a large number of sensitive equipment in industrial processes are put into use, power quality problems have brought great economic losses to users, especially voltage sags, which have become the most important power quality problems affecting the normal operation of industrial processes. In the case of unavoidable voltage sag, the configuration of voltage sag mitigation equipment has become an important way for sensitive users to avoid economic losses. Due to the high investment cost of configuring voltage sag mitigation equipment, determining the optimal investment plan requires a reasonable assessment of the voltage sag economic loss before and after equipment configuration. Therefore, accurate assessment of the economic losses caused by voltage sags ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/06G06Q50/06
CPCY02P90/82G06Q10/06395G06Q50/06
Inventor 周友富雷斌张玉鸿
Owner STATE GRID SICHUAN ECONOMIC RES INST
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