Pre-assessment method for economic loss of voltage sag in tft-lcd manufacturing industry

Abstract

The invention relates to a method for pre-assessing the economic loss of a voltage sag in a TFT-LCD manufacturing industry. Combining the electrical characteristics of the voltage sag and the physical characteristics of the TFT-LCD production process, the number of production process interruptions and economic losses caused by the voltage sag that may be encountered in the future can be estimated in the absence of voltage sag data for the new production line Take a pre-assessment. The pre-assessment method of the present invention has the advantages of clear principle, simple and convenient calculation, easy to master, acceptable error and practical engineering value.

Description

technical field [0001] The invention relates to a method for pre-assessing the economic loss of a voltage sag in a TFT-LCD manufacturing industry. Background technique [0002] In recent years, with the rapid development of smart terminals such as smart phones and tablet computers, the display panel manufacturing technology has become more and more mature; among them, Thin Film Transistor-Liquid Crystal Display (TFT-LCD) has a high contrast ratio, The advantages of fast response, strong sense of hierarchy, and high yield rate have become the mainstream products of display equipment, and more and more new TFT-LCD enterprises and new production lines are operating and building. Since there are a large number of voltage-sensitive devices in the production process of TFT-LCD manufacturing, voltage sag has become the most serious power quality problem affecting its production. An effective and accurate pre-assessment of economic losses caused by voltage sags is an important basi...

AI Technical Summary

Problems solved by technology

[0004] Existing evaluation methods consider the physical characteristics of industrial processes on the basis of electrical characteristics. Among them, Xiao Xianyong, Liu Yang, Liu Xuna, et al. provide a detection method for determining the voltage sag immunity time of complex industrial processes (industrial Detection method of equipment voltage sag immunity:, CN103399239A[P]. 2013.), this method divides the process parameters corresponding to each link in the industrial process and equipment, and tests the time limit, and determines the entire time according to the length of time. The voltage sag immunity time of industrial processes, but this method does not study the economic losses caused by voltage sags in combination with the number of production process interruptions and the resulting loss costs

Li Chunhai, Li Huaqiang, and Liu Bojiang proposed the evaluation method of "Economic Loss Risk Assessment of Voltage Sag for Industrial Users Based on Process Immune Uncertainty [J]." (Electric Power Automation Equipment, 2016, 36(12):136-142.) , from the entire industrial process, the logical relationship between the structure and function of each production process and its equipment is described. Although this method comprehensively considers the electrical characteristics of the voltage sag and the physical characteristics of the industrial process, it is suitable for the impact of the voltage sag. In the event that the user has collected a large amount of raw data, it is not applicable to the pre-evaluation of the new production line

And neither of the above two methods proposed a specific evaluation model for the TFT-LCD production process

Images