大型高科技工廠多地網接地系統雷擊與開關突波特性分析

Lightning Surge and Switching Surge Characteristics of Grounding System with Multi-gird in the Large High-Tech Factories

吳孟昌(Meng-Chang Wu)

指導教授 ： 周至如

中原大學/工學院/電機工程研究所/碩士(2002年)

https://doi.org/10.6840/cycu200200162

摘要

本文以161kV供電之大型積體電路（IC）製造廠為對象，探討其接地系統的雷擊與開關突波特性。以電磁理論觀點來描述接地系統之行為，分析接地系統在雷突波電流與開關突波電流作用下的電磁特性，包括：地表面電位、電磁場等，根據這些接地系統之電磁特性，再進一步分析與人員相關之步間電壓與接觸電壓，以及與設備有關的接地電位湧昇GPR與接地電位差GPD，並依據上述分析結果評估對人員與設備之危害程度。

分析結果顯示，雷擊與開關突波所產生之暫態地電位差可能會對人員與低壓設備造成傷害，必須加強各種防護措施，因此本研究提出改善方法以提昇接地系統對雷擊與開關突波之防護能力，及有助於提昇供電品質。

關鍵字

開關突波 ； 接地系統 ； 雷擊

並列摘要

This study is to analyze the lightning and switching surges characteristics of grounding system of typical large integrated circuit (IC) manufacturing plants fed with 161kV power. The thesis analyzes lightning and switching surges characteristics of grounding system directly form the view point of electromagnetic principles, i.e. analyzes the electromagnetic characteristics of grounding system with respect to the lightning surges and switching surges. The analysis items included the ground surface potentials and electromagnetic fields. Based on the analysis results, the step and touch voltages related to human safety, and the transient ground potential rise (GPR´s) and ground potential difference (GPD´s) related to equipment protection are analyzed; from which, we can assess the damages of personnel and equipments on the grounding system.

The analysis results have shown that the GPD´s produced by switching operation and lightning will threaten the safety of personnel, low voltage equipments and weak systems. For improving the protection performances of grounding system against the lightning and switching surges, the improving methods are proposed here. The improving methods will also contribute to upgrading the power quality.

並列關鍵字

Switching Surge ； Grounding System ； Lightning

參考文獻

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