69kV輸電鐵塔接地電極突波阻抗量測方法研究

Study on Surge Impedance Measurement Techniques for Ground Electrodes of 69kV Transmission Tower

王奕凱(Yi-Kai Wang)

指導教授 ： 陳士麟

中原大學/工學院/電機工程研究所/碩士(2014年)

https://doi.org/10.6840/cycu201400372

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絕緣礙子絕緣破
壞。由於雷擊電流係屬高頻特性，遂對於雷擊突波而言，大地土壤之
交流阻抗相較直流電阻更為重要，惟目前對於高頻接地阻抗之量測文
獻資料較少，本論文遂開發於高頻時之接地阻抗量測方法。
本研究第一部分整理高頻量測相關文獻，同時進行接地電阻實驗，
了解低頻量測法須要修改的地方，並針對未來高頻接地阻抗研究開發
新方法。第二部分以套裝軟體CDEGS (Current Distribution
Electromagnetic Field,Grounding and Soil Structure Analysis)模擬雷擊
的電磁暫態特性，模擬地網注入高頻電流時，分析接地電極與土壤的
地電位昇，與第一部分所提出之方法互相呼應。

關鍵字

接地電極、高頻量測、突波電流、地電位昇

並列摘要

Ground grid of transmission tower are designed to prevent back
flashover even insulator failure caused by very high Ground Potential
Rise (GPR) on tower when ground fault and lightning . AC Impedance is
more important than DC Resistance of the soil when encountering
lighting surge due to the high frequency of the lighting current. 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 at first, we conduct experiments on ground resistance at the
same time in order to improve the low-frequency measurement and
develop new method for high-frequency ground resistance research in the
future. Secondly, we simulate the Electromagnetic Transient of lighting
in CDEGS (Current Distribution Electromagnetic Field, Grounding and
Soil Structure Analysis) software, which analyzes the GPR of grounding
electrode and soil by simulating high-frequency injecting to ground
meshes. 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

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

參考文獻

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[2] A. D. Papalexopoulos, and A. P. Meliopoulos, “Frequency dependent characteristics of grounding systems,” IEEE Transactions on Power Delivery, Vol. 2, No. 4, pp.1073-1081, 1987.

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[4] K. Yamamoto, S. Yanagawa, K. Yamabuki, S. Sekioka, and S. Yokoyama, “Analytical Surveys of Transient and Frequency-Dependent Grounding Characteristics of a Wind Turbine Generator System on the Basis of Field Tests,” IEEE Transactions on Power Delivery, Vol. 25, No.4, Japan, pp.3035-3046, 2010.

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