本文選題：同塔多回輸電線路 + 感應電壓��； 參考：《華南理工大學》2014年碩士論文

【摘要】：同塔多回輸電技術不僅可以減少綜合造價和線路走廊的需求，也提高了單位線路的傳輸容量，同時也滿足了電力傳輸?shù)男枨�。由于其明顯的經(jīng)濟效益和社會效益，同塔多回輸電技術在國內(nèi)外廣泛應用。但是，在同塔多回輸電線路中，當其中一回或幾回停電檢修，而其它回正常運行時，在停電線路上會產(chǎn)生感應電壓和感應電流。特別是在電壓等級很高的同塔多回輸電線路，，感應電流和感應電壓可能會很大。因此研究同塔多回輸電線路的感應電流和電壓對于推進同塔多回輸電技術的應用以及接地開關的選型有極大的幫助。 本文首先從理論計算方面簡單地對同塔多回輸電線路的感應電流和感應電壓進行了研究分析。然后以瑤崗變電站工程一段220kV同塔多回輸電線路為實例，在ATP Draw程序中建立了同塔多回輸電線路模型，在各種系統(tǒng)運行方式下對同塔多回輸電線路的感應電壓和感應電流進行了仿真計算。本文還對輸電線路長度、桿塔檔距、運行線路輸送功率、土壤電阻率等因素對同塔多回輸電線路感應電壓和感應電流的影響進行了仿真計算及分析，從而得出同塔多回輸電線路感應電壓和感應電流的一般規(guī)律。最后，根據(jù)接地開關的選擇標準，對該在建變電站的同塔四回輸電線路的接地開關進行選擇并提出建議。
[Abstract]:Multi-circuit transmission technology in the same tower can not only reduce the comprehensive cost and the demand of the corridor, but also improve the transmission capacity of unit lines, and meet the demand of power transmission. Due to its obvious economic and social benefits, the multi-circuit transmission technology of the same tower is widely used at home and abroad. However, in the same tower multi-circuit transmission line, when one or several times of outage is overhauled and the other circuit is in normal operation, inductive voltage and inductive current will be generated on the blackout line. The inductive current and inductive voltage can be very large, especially in the high voltage-level multi-circuit transmission lines of the same tower. Therefore, the study of inductive current and voltage of multi-circuit transmission line with the same tower is of great help to the application of the same tower multi-circuit transmission technology and the selection of grounding switch. In this paper, the inductive current and inductive voltage of the multi-circuit transmission line with the same tower are studied and analyzed simply from the aspect of theoretical calculation. Then, taking the 220kV multi-circuit transmission line of the same tower in Yaogang Substation Project as an example, the model of the multi-circuit transmission line of the same tower is established in the ATP draw program. The induction voltage and inductive current of the multi-circuit transmission line with the same tower are simulated under various operation modes of the system. The effects of transmission line length, tower distance, transmission power and soil resistivity on induction voltage and inductive current of multi-circuit transmission lines with the same tower are simulated and analyzed in this paper. The general law of inductive voltage and inductive current of multi-circuit transmission line with the same tower is obtained. Finally, according to the selection criteria of the grounding switch, the grounding switch of the same tower four-circuit transmission line of the substation under construction is selected and some suggestions are put forward.
【學位授予單位】：華南理工大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TM751

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本文編號：2015790