同塔多回输电线路感应电流、电压的研究

发布时间：2018-06-13 22:46

本文选题：同塔多回输电线路 + 感应电压　；参考：《华南理工大学》2014年硕士论文

【摘要】：同塔多回输电技术不仅可以减少综合造价和线路走廊的需求，也提高了单位线路的传输容量，同时也满足了电力传输的需求。由于其明显的经济效益和社会效益，同塔多回输电技术在国内外广泛应用。但是，在同塔多回输电线路中，当其中一回或几回停电检修，而其它回正常运行时，在停电线路上会产生感应电压和感应电流。特别是在电压等级很高的同塔多回输电线路，，感应电流和感应电压可能会很大。因此研究同塔多回输电线路的感应电流和电压对于推进同塔多回输电技术的应用以及接地开关的选型有极大的帮助。本文首先从理论计算方面简单地对同塔多回输电线路的感应电流和感应电压进行了研究分析。然后以瑶岗变电站工程一段220kV同塔多回输电线路为实例，在ATP Draw程序中建立了同塔多回输电线路模型，在各种系统运行方式下对同塔多回输电线路的感应电压和感应电流进行了仿真计算。本文还对输电线路长度、杆塔档距、运行线路输送功率、土壤电阻率等因素对同塔多回输电线路感应电压和感应电流的影响进行了仿真计算及分析，从而得出同塔多回输电线路感应电压和感应电流的一般规律。最后，根据接地开关的选择标准，对该在建变电站的同塔四回输电线路的接地开关进行选择并提出建议。
[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.
【学位授予单位】：华南理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM751

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