- 學位論文
多重地網系統之人身安全驗證與模擬
Verification and Simulation of Personal Safety in the Multi-Ground Grid Systems
摘要
本論文主要目的在探討現行接地網設計與準則對人身安全實例運用，文中首先參考各先進國家變電所接地系統設計理論與準則，經比較後採取IEEE-Std 80-2000：Guide for Safety in AC Substation Grounding為本研究之主要分析標準。接著說明變電所地網設計準則，如土壤電阻率、地網電阻係數、接地電阻與電位降之測量方法分析與探討，詳細推導地網電阻、電流、電壓計算理論與分析整理設計地網之程序。其次完成台電某變電所之地網設計實例計算與模擬分析，並實際比較IEEE-80-2000簡化公式與地網設計軟體ETAP之地網設計實例差異。最後整合IEC60479、ITU K.33、BS 7354及EG-0 Power System Earthing Guide—part 1: management principles等國際標準，針對人身安全所建議的心臟電流因子(heart current factor, HCF)，並考慮鞋或腳底與其他穿搭物件電阻等參數，來表達由接地故障點至接地地網間電流路徑人員實際受電情況，重新分析人員於台灣某水庫之地網中所受接觸電壓和步間電壓是否達到安全標準，以確定接地系統安全性。
並列摘要
The major purpose of this thesis is the verification and simulation of personal safety in the multi-ground grid systems. After the assessment of the theories and designed procedures of various international grounding protocol for substation, the IEEE 80-2000：Guide for Safety in AC Substation Grounding are adopted in this thesis. Meanwhile, the procedure guide to design ground grid in substations is introduced such as the measuring methods of soil resistivity, grounding system impedance, earth surface potential of ground system. Then, the comparison between the compact procedures of IEEE-80-2000 and the simulations of ETAP software are listed and discussed using a real case of substation grounding design of Taiwan power company. Finally, international standards such as IEC60479、ITU K.33、BS 7354 and EG-0 Power System Earthing Guide—part 1: management principles are combined to illustrate the actual potential impact from the fault point via grounding system to the person specifically including the aspect of suggested heart current factor (HCF) and considering the resistance of shoes, feet and other clothing in order to analyze the safety factor of touch potential and step potential of a specific reservoir in Taiwan and its system safety.