高層建築物低壓配電系統中性線電流 與大地洩漏電流及地電位分佈之研究

A Study on the Neutral Line currents, Earth Leakage Currents and Ground Potential Distributions of Low Voltage Distribution System in the High-Rise Building

任建國(Chien-Kuo Jen)

指導教授 ： 周至如

中原大學/工學院/電機工程研究所/碩士(2004年)

https://doi.org/10.6840/cycu200400187

摘要

中文摘要
本論文藉由實例的模擬及量測數據，以及各種參數的影響分析來探討高層建築物低壓配電系統之中性線電流、大地洩露電流ELC (Earth Leakage Current)及地電位的分佈。
論文中首先描述高層建築物內各種接地系統，並檢討低壓配電系統及其中性線電流及大地洩漏電流的成因，然後針對低壓三相五線式配電系統建立電路模型及計算相關參數，並以解耦技巧(Decoupled Technique)簡化其電路模型，以利精確分析中性線電流與大地洩漏電流及地電位的分佈，最後將考慮中性線的接地方式、負載準位、功因、電壓準位及接地電阻大小等之影響進行分析比較。
現有實例摸擬與量測所獲得的數據，都能驗證中性線電流及大地洩漏電流分佈的趨勢，這些數據都可提供高層建築物配電系統中性線電流與大地洩漏電流對地電位分佈的資訊，對於配電系統的規劃設計及接地系統的改善都具參考價值。

關鍵字

解耦技巧 ； 高層建築物 ； 大地洩漏電流

並列摘要

Abstract
This thesis investigates the distributions of neutral line currents, earth leakage currents (ELC) and ground potential of low voltage distribution system in the high-rise building based on the simulation and measurement data of the practical case and the analysis of the affections of various parameters. The grounding systems of various systems in the high-rise building are first described and the root causes of producing neutral line currents and earth leakage currents are discussed. Then, the circuit model of low voltage three-phase-five-wire (3ψ5w) distribution system and the parameters of circuit model are found out. The circuit model will be further simplified by using “decoupled method” for precisely simulating the distributions of neutral line currents, earth leakage currents and ground potential. Finally, the comparisons between various analysis results by considering different grounding types of neutral line load levels, power factors, voltage levels and grounding resistances are presented. These analysis results and the data obtained from simulation and measurements of practical case certify the tendency of the distributions of neutral line currents, earth leakage currents and ground potential of low voltage distribution system in the high-rise building. All of the information will be helpful for planning the distribution system and improving the grounding systems in the high-rise building.

並列關鍵字

earth leakage current ； decoupled te ； high-rise Building

參考文獻

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