161kV電纜連接站雷擊特性分析及改善對策

Lightning Surge Characteristics Analysis for the 161kV Cable Connection Stations and Improvement Strategies

廖祐賢(Yu-Hsien Laio)

指導教授 ： 周至如 ； 李俊耀

國立臺北科技大學/電資學院/電資碩士在職專班研究所/碩士(2014年)

https://doi.org/10.6841/NTUT.2014.00250

摘要

本文分析161kV電纜連接站之雷擊特性並評估其影響及提出改善對策，其中主要針對雷擊發生於電纜連接站架空地線及相導體時，分析架空線路、電纜連接站、地下電纜相關設備電壓及電流之變化，並藉此評估其對設備之影響。
文中首先運用電磁暫態分析程式(ATP)建構主模型及模擬雷擊特性，模型中將考慮161KV架空線路、電纜連接站及地下電纜。雷擊特性之模擬將考慮不同雷擊電流、不同雷擊點及不同系統條件，其中不同系統條件是考量不同改善對策，包括是否加裝線路避雷器、不同塔腳電阻值、不同架空地線數量、連接站是否裝設避雷器與鐵塔各段橫桿間加裝電容器等不同條件。分析結果顯示不同改善對策均有其效果，若雷擊發生於電纜連接站架空地線時，加裝線路避雷器及降低塔腳電阻時保護架空線路與地下電纜較有利。另外雷擊點在相導體時，則鐵塔各段橫桿間加裝電容器與降低塔腳電阻以緩和突波電壓，對地下電纜更有較好保護。本文探討結果值得供給後續研究改善電纜連接站裝置之參考。

關鍵字

電纜連接站 ； 線路避雷器 ； 電塔電位 ； 避雷器 ； 絕緣礙子跨壓 ； 塔腳電阻 ； 電容器

並列摘要

The lightning characteristics of 161kV cable connection stations(CCS) and the affections are evaluated.The improved strategies are also proposed.The study mainly focus on the analysis of voltage and current variations on the overhead lines,CCS and underground cable relative equipments with respect to the lightning on the overhead ground wire(OGW)and phase conductor,and to evaluate the affections equipments,based on the analysis results.
First of all,modeling and simulation of lightning characteristics by alternative transient program(ATP) are presented,in which the 161kV overhead line,CCS and underground cable will be considered in the model.In addition,different lightning currents,different lightning points and different system conditions will be considered for the lightning characteristics simulation.The different system conditions means that different improved strategies which include overhead line with or without line arresters,different tower foot resistances,different numbers of OGW,CCS with or without arresters and tower arms with or without capacitors.Analysis results show that line arresters and reducing tower foot ground resistances are more effective than others for protecting overhead line and underground cable of lightning point on OGW of CCS.While,if lightning point on phase conductors of CCS,to install capacitors between tower arms and reducing tower foot ground resistances are prefer for increasing the protection of underground cables.The study results are valuable for the study of CCS improvement devices in the future.

並列關鍵字

Cable Connection Stations, ； Line Arrester ； Transi0ent Overvoltage ； Tower voltage ； Tower foot ground resistance ； Capacitors

參考文獻

[14]梁興華，一次變電所之雷擊突波特性分析及其對設備之影響評估，國立台北科技大學碩士學位論文，2011。

[21]陳三木，架空輸電線路雷擊閃絡之防止對策，國立成功大學碩士學位論文，2006。

[1]H. Elahi, M. Sublich, M. E. Anderson and B. D. Nelson, "Lightning overvoltage protection of the paddock 362-145 kV gas-insulated substation," IEEE Transactions on Power Delivery, Vol. 5, No. 1, 2002, pp. 144-150.

[2]Xi Jin, Wei Lu and Shouju Chen, "New type lightning protection schemes of substation incoming lines and their simulations," 2004 Power System Technology International Conference, Vol. 5,No. 1, 2005, pp. 181-184.

[3]C. A. Jordan, “Lightning Computation for Transmission Lines with Overhead Ground Wire,” General Electric Review, Vol.37,1934, pp.180-186.