特高压并联电抗器铁心振动研究及仿真分析

发布时间：2018-01-11 03:08

本文关键词：特高压并联电抗器铁心振动研究及仿真分析　出处：《山东大学》2017年硕士论文　论文类型：学位论文

【摘要】：近年来,随着我国用电需求快速增长和绿色清洁能源的迫切需求,中国进入了超、特高压输变电工程的高速发展时期。特高压并联电抗器作为远距离输电系统的关键设备,主要用于补偿电力系统的无功容量,降低动态电压,对电力电容器的安全运行,改善系统电压波形,同时对电网质量及安全、经济运行起了良好的作用。伴随着电压、容量的增加和电力系统技术水平的提高,在特高压并联电抗器中,振动和噪声问题尤其突出,而特高压并联电抗器的振动主要就是由于铁心振动引起的。特高压并联电抗器的核心问题是由于铁心振动带来的本体振动和噪声大的问题,威胁设备及电网的安全运行。本文通过对对特高压并联电抗器在100Hz频率下的铁心振动进行了仿真,对电抗器的铁心进行三维建模,对铁心和铁轭的电磁力及夹件、压梁、器身磁屏蔽等钢结构件受力进行仿真计算;对特高压并联电抗器进行整体的瞬态振动响应分析,求得电抗器整体在各时刻受到的瞬态振动力,得出各区域振动位移仿真数据;通过对铁心约束数、约束程度对特高压并联电抗器铁心固有频率的影响进行研究,求解前五阶的固有频率,同时对特高压并联电抗器固有频率进行仿真分析,得到特高压并联电抗器的各阶固有频率。基于此,为抑制特高压并联电抗器铁心振动,采用了五处压紧及止退系统;通过对铁心夹紧结构材料疲劳特性进行研究,在铁心夹紧结构件的关键部位选择特殊的材料来提高铁心夹紧结构强度;同时通过选取合理的磁通密度、心柱及铁轭尺寸,选取低磁致伸缩率的优质硅钢片抑制特高压并联电抗器铁心振动。最后通过对铁心振动与油箱振动的测量,对比仿真分析结果,验证铁心振动抑制措施的有效性。
[Abstract]:In recent years, with the rapid growth of China's electricity demand and the urgent need of green clean energy, China has entered into the super. UHV shunt reactor, as the key equipment of long-distance transmission system, is mainly used to compensate the reactive power capacity of power system and reduce the dynamic voltage. For the safe operation of power capacitor, improve the system voltage waveform, at the same time, the quality and safety of the network, economic operation has played a good role, along with the increase of voltage, capacity and power system technology level. In UHV shunt reactors, the vibration and noise problems are especially prominent. The vibration of UHV shunt reactor is mainly caused by the core vibration. The core problem of UHV shunt reactor is the vibration and noise caused by the core vibration. In this paper, the core vibration of UHV parallel reactor at 100Hz frequency is simulated, and the three-dimensional modeling of the core of reactor is carried out. The electromagnetic force of iron core and yoke and the force of steel structure such as clamping beam and magnetic shield are simulated and calculated. The transient vibration response of UHV shunt reactor is analyzed, and the transient vibration force of the whole reactor at every moment is obtained, and the simulation data of vibration displacement in each region are obtained. Through the study of the influence of the number of core constraints and the degree of constraint on the core natural frequency of UHV shunt reactor, the first five natural frequencies are solved. At the same time, the natural frequency of UHV shunt reactor is simulated and analyzed. The natural frequencies of the UHV shunt reactor are obtained. In order to suppress the core vibration of UHV shunt reactor, five pressure tightening and stopping systems are adopted. By studying the fatigue characteristics of the core clamping structure material, special materials are selected in the key parts of the core clamping structure to improve the strength of the core clamping structure. At the same time, select reasonable magnetic flux density, core and iron yoke size, select low magnetostrictive rate of high quality silicon steel to suppress UHV parallel reactor core vibration. Finally, through the measurement of core vibration and oil tank vibration. Compared with the simulation results, the effectiveness of the core vibration suppression measures is verified.
【学位授予单位】：山东大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM472

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