345kV氣封絕緣開關設備之感應環流特性分析及其影響評估

現代的電力設備除了要求可靠性、安全性之外，尚須滿足多項要求，諸如構造應緊湊密實以縮小變電所之空間、操作者之安全保障、設備易於檢查維護、以及降低對環境的危害等，都是提供安全可靠的電力供應所必須考慮的課題。GIS設備外殼受內部導體電流感應所產生的循環電流相當大，若因設備接地不良或互連導體處理不當，會導致此循環電流透過大地回流到其它匯流排或控制箱導致設備的故障，甚至危害到設備維護人員的安全。本論文針對345kV氣封絕緣開關設備外殼及接地線內部導體電流感應所產生的循環電流特性進行分析，其中將考慮不同負載準位、供電方式、設備外殼材質及外殼接地方式做深入探討。文中首先應用電磁暫態分析程式之改良程式(ATP)建構模型，然後，分析不同負載分配方式在搭配不同接地方式下所得的各段GIS設備外殼電流值以及接地電流值；此外，藉由改變外殼材質所產生不同的感應環流值可評估電力消耗情況，最後根據這些分析結果以評估其影響，包括對人員及設備的影響，本研究相關分析所得之數據可作為進一步探討GIS供電方式及設備之設計和防護措施之參考。

關鍵字

感應環流；氣封絕緣開關設備

並列摘要

The modern power equipments require not only reliability and security, but also many other requirements such as the conciseness of structures to minimize the size of substations, the security of operators, maintenance of equipments and that the threat to the environment must be reduced. These requirements are essential topics to be considered so as to provide safe and reliable electric power. The induced circulation current in the case of gas insulation switchgear (GIS) is quite large. If the equipment are not well grounded or the interconnected conductors are not well treated, this induced circulation current will flow, via the earth ground, to other buses or control panels and then lead to the faults of equipments and even pose threat to the maintainers of equipments. This thesis is aimed to analyze the induced circulation current in the cases of 345kV GIS and ground wires. The analysis considers different load patterns, power supply structures, materials of GIS cases and the grounding types. The circuit model eased on the Alternative Transient Program (ATP) is first constructed. Secondly, this thesis analyzes the current in each section of GIS cases and ground wires at different load patterns with different grounding types are analyzed. Besides, the power consumption can be assessed on the basis of different induced circulation current, which can be obtained by changing the materials of GIS cases. Finally, based on these analysis results, this thesis assesses their influence on personnel and equipment. The data in this thesis can provide reference for further studying power supply scheme and design of GIS and protection strategies for GIS.

並列關鍵字

Gas Insulation Switchgear ； Induced Circulator Current

參考文獻

[3] IEC60056：4th EDITION：1987, “High voltage alternating current circuit-breakers,” May.2001.

[4] S. Yamashita, N. Miyake, K. Suzuki ,H. Ikeda, S. Yanabu, “Short circuit Testing Method Of 3-Phase-In-One-Tank-Type SF6 Gas Circuit Breaker,” IEEE,1 January 1989.

[5] M.Yamamoto,S. Yamashita , H. Ikeda, and S. Yanabu, “New short circuit Testing Facilities to Cope with the Recent Development of GIS ,” IEEE Trans. On PAS,Vol PAS-104,No .1 ,1985.

[6] K.J.Froehlich, Schett, and D.S Johnson, “A New Three Phase Synthetic Test Circuit for HVAC Breakers of High Interrupting Power as Applied to a New 242KV SF6 Single Tank Breaker,” IEEE PES Winter Meeting,87 WM 119-1,1987.

[7] C.Guilloux,P.G. Scarpa, “Measurement Of The Post Arc Current Of Hv Circuit Breakers,” IEEE, 3 July 1993.

國際替代計量

345kV氣封絕緣開關設備之感應環流特性分析及其影響評估

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