輸電鐵塔接地電極之突波特性試驗及模擬

Test and Simulation of Surge Characteristics for Ground Electrodes of Transmission Tower

王建誠(CHIEN-CHENG WANG)

指導教授 ： 陳士麟

中原大學/電機資訊學院/電機工程研究所/碩士(2016年)

https://doi.org/10.6840/cycu201600066

摘要

鐵塔接地電極設計主要避免在接地故障故障電流與雷擊電流導入大地時，鐵塔有過高的地電位昇致發生逆閃絡甚至破壞絕緣礙子。由於雷擊為突波特性且有高頻成分，過去文獻探討較少，尤其對於鐵塔接地電極之突波特性試驗方法未有深入比較，本論文遂對此加以探討。
首先整理高頻量測的相關文獻，釐清目前接地電極的低頻量測法不適用於雷擊高頻量測之處，然後提出接地雷突波接地特性之試驗方法並進行實地量測。本文再以接地系統電磁特性分析軟體CDEGS (Current Distribution Electromagnetic Field,Grounding and Soil Structure Analysis)模擬地網注入高頻電流時，分析接地電極和量測方法與土壤的地表電位分佈之關係，最後將CDEGS模擬結果與前述突波特性之試驗做比較，以說明高頻特性之影響供設計者參考。

關鍵字

接地電極 ； 高頻量測 ； 突波電流 ； 地表電位分佈

並列摘要

Grounding electrodes of transmission tower are designed to prevent back flashover even insulator failure caused by very high Ground Potential Rise (GPR) on tower during ground fault and lightning . The lightning current has high-frequency characteristic, However, few references discussed the high-frequency ground resistance; we thus develop a method for measuring the ground resistance in this thesis.
Reviewing the related references which discussed the high frequency measurement for knowing the part of low-frequency measurement which need to modify at first, and conduct experiments on ground resistance for new method of high-frequency ground resistance measurement. Secondly, we simulate the high-frequency current inject into the ground grid in CDEGS (Current Distribution Electromagnetic Field, Grounding and Soil Structure Analysis) software, which analyzes the GPR of grounding electrode and soil by different measurement ways. By analyzing the result of experiments and reviewing the related reference, we develop new approach to high-frequency ground resistance research.

並列關鍵字

Grounding Electrode ； High-Frequency Measurement ； Surge Current ； Ground Potential Rise

參考文獻

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[9]王奕凱，69kV輸電鐵塔接地電極突波阻抗量測方法研究，中原大學電機工程研究所碩士論文，2014年7月。

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