饱和铁芯型超导可控电抗器的输电技术应用研究

发布时间：2018-05-11 13:10

本文选题：超导可控电抗器 + PSCAD　；参考：《昆明理工大学》2014年硕士论文

【摘要】：本文依托科技项目《超导可控电抗器在电网中的应用研究》,主要介绍了饱和铁芯型超导可控电抗器和高漏抗型超导可控电抗器两种类型的超导可控电抗器,分析了它们的结构原理；建立饱和铁芯型可控电抗器的电磁模型,借助220V/20A的饱和铁芯型可控电抗器样机进行试验分析,为饱和铁芯型超导可控电抗器在高电压等级输电系统中建立等效模型奠定基础。本文首先仿真研究分析超导可控电抗器对线路甩负荷、不对称故障时过电压的影响,该类型电抗器利用其连续平滑调节,响应速度快的特点对线路甩负荷、不对称故障过电压有较好的抑制作用;结合云南电网实际情况,选择德宏-砚山这条较为典型的输电线路,利用该条线路在不同运行方式下潮流数据,研究探讨它在这条线路首端、末端电压偏高严重地区投入可控电抗器对龟压的调节作用,通过仿真分析发现超导可控电抗器能在该线路各种运行方式下快速有效的实现电压调节,保持节点电压的平衡；将超导可控电抗器接入发电机端,通过仿真发现,它能够在保持系统无功平衡的同时,稳定机端电压,改善发电机进相运行情况；在PSCAD中搭建超高压仿真模型,在线路的首端、末端均装设并联高抗,并采用并联电抗器加中性点可控小电抗的协调控制方法,其中中性点小点抗采用超导可控电抗器,在线路中设置单相故障,通过仿真分析,我们发现并联高抗与中性点可控小电抗的方法,能够在不同补偿度下较好抑制潜供电流。
[Abstract]:This paper mainly introduces two types of superconducting controllable reactors: saturated iron core type superconducting controllable reactor and high leakage reactance type superconducting controllable reactor based on the scientific and technological project "Research on the Application of Superconducting controllable reactor in Power Grid". The structure principle is analyzed, the electromagnetic model of the saturated iron core controllable reactor is established, and the experimental analysis is carried out with the help of the 220V/20A prototype of the saturated iron core controllable reactor. It lays a foundation for the establishment of equivalent model of superconducting controllable reactor with saturated iron core in high voltage level transmission system. In this paper, the influence of superconducting controllable reactor on line load rejection and over-voltage during asymmetric fault is studied by simulation. This type of reactor uses its characteristics of continuous smooth adjustment and fast response to load rejection. The asymmetric fault overvoltage has a good restraining effect, combined with the actual situation of Yunnan Power Grid, the more typical transmission line Dehong Yanshan is selected, and the power flow data of this line under different operation modes are used. In this paper, the regulating effect of controllable reactor on tortoise voltage at the first end of this line is studied, and the terminal voltage is on the high side. Through the simulation analysis, it is found that the superconducting controllable reactor can quickly and effectively adjust the voltage and maintain the balance of the node voltage under various operation modes of the line, and the superconducting controllable reactor is connected to the generator terminal, and the simulation results show that, It can stabilize the terminal voltage while maintaining the reactive power balance of the system, and improve the forward phase operation of the generator. The EHV simulation model is set up in PSCAD, and the parallel high reactance is installed at the first end and the end of the line. The coordinated control method of parallel reactor and neutral-point controllable small reactance is adopted, and the superconducting controllable reactor is used to control the neutral-point resistance. The single-phase fault is set up in the circuit, and the simulation analysis is carried out. We find that the method of parallel high reactance and neutral-point controllable small reactance can restrain the potential supply current well under different compensation degrees.
【学位授予单位】：昆明理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM47

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