风电交流接触器电磁机构的设计

发布时间：2018-06-13 05:47

本文选题：交流接触器 + 电磁机构　；参考：《沈阳工业大学》2017年硕士论文

【摘要】：随着全世界对能源需求的高速增长,风能的开发与利用成为了焦点,近年来风力发电在电网系统中比例不断攀升,规模不断增加,逐渐出现了风力发电机组运行可靠性的问题。交流接触器在风力发电系统中主要起控制的作用,其可靠性将直接关系到风力发电系统的运行可靠性。风力发电系统要求交流接触器具有较高的电寿命和可靠性,其电磁机构在分闸和合闸的操作过程中,具有较快的分闸速度、合闸速度以及较高的输出功。因此,研究风力发电系统专用的交流接触器,提高其对风力发电系统的匹配性,对于提高风力发电系统运行的可靠性至关重要。本文根据风力发电系统对于交流接触器的要求,通过分析现有电磁机构的优点与不足,提出了一种新型的双稳态电磁机构。通过运用电磁学理论与经验公式,对电磁机构进行初步设计与计算,确定其基本参数,并对其控制电路进行设计,实现低电压穿越的功能。利用Ansoft有限元分析软件对所设计结构分别进行静磁场和瞬态磁场的仿真分析。通过对静磁场进行分析,得到电磁机构的静态吸反力特性曲线和电磁回路的磁场分布图,由此通过调整,改进设计结构的尺寸参数。基于静磁场态模型,通过添加外电路,设置线圈匝数等参数,建立设计结构的瞬态磁场仿真模型。通过分别对设计结构合闸和分闸过程进行仿真分析,得到相应的速度特性、位移特性、电流特性等动态特性曲线。通过分析各参数对电磁机构动态特性的影响,对设计结构进行改进,确定各部分尺寸参数。通过对比特性参数与设计参数要求,验证设计机构的合理性。
[Abstract]:With the rapid growth of energy demand in the world, the development and utilization of wind energy has become the focus. In recent years, the proportion of wind power generation in the power grid system is increasing, the scale of wind power generation is increasing, and the problem of operational reliability of wind turbine has appeared gradually. Ac contactor plays a controlling role in wind power system, and its reliability is directly related to the operational reliability of wind power system. The AC contactor is required to have high electrical life and reliability in wind power generation system, and its electromagnetic mechanism has higher opening speed, closing speed and higher output power in the operation process of opening and closing. Therefore, it is very important to study the special AC contactor of wind power system and improve its matching ability to improve the reliability of wind power system. According to the requirement of AC contactor in wind power generation system, a new bistable electromagnetic mechanism is proposed by analyzing the advantages and disadvantages of the existing electromagnetic mechanism. By using the theory of electromagnetism and empirical formula, the primary design and calculation of electromagnetic mechanism are carried out, the basic parameters are determined, and its control circuit is designed to realize the function of low voltage traversing. The static magnetic field and transient magnetic field of the designed structure are simulated by Ansoft finite element analysis software. Through the analysis of the static magnetic field, the characteristic curve of the static absorbing reaction force of the electromagnetic mechanism and the magnetic field distribution diagram of the electromagnetic circuit are obtained, and the dimension parameters of the design structure are improved by adjusting the magnetic field. Based on the static magnetic field model, the transient magnetic field simulation model of the design structure is established by adding the external circuit and setting the number of coil turns. Through the simulation and analysis of the closing and closing process of the design structure, the corresponding dynamic characteristic curves such as velocity characteristic, displacement characteristic, current characteristic and so on are obtained. By analyzing the influence of the parameters on the dynamic characteristics of the electromagnetic mechanism, the design structure is improved and the dimension parameters of each part are determined. The rationality of the design mechanism is verified by comparing the characteristic parameters with the design parameters.
【学位授予单位】：沈阳工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM572.2;TM614

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