论文-交直交变流器的电磁兼容性的研究..doc

交直交变流器电磁兼容性的研究 摘要 改善能源结构，发展新的可再生性能源，减轻对环境污染，提高电能的质量，已成为我国能源工业关注的一个热点。风力发电技术以安全可靠、无污染、不需消耗燃料、建设周期短、规模大小灵活以及可并网运行等特点，在能源产业、电力产业中异军突起。风电系统中由于大量的使用电力电子装置，不可避免的会给系统引入电磁兼容性问题，并对系统造成严重影响，这种影响随着系统功率的增大而变得日趋严重。 本文以MW级变速恒频双馈风力发电系统用交直交变流器作为研究对象，分析了变流器系统的主要的干扰源、干扰耦合路径及敏感设备，对变流器进行了电磁兼容性设计。这些设计包括：1.网侧变流器输入端电源线EMI滤波器和转子侧变流器输出端EMI滤波器设计。2.硬件和软件方面对变流器控制系统进行了抗干扰分析，及长线传输过电压问题，利用传输线理论分析了长线传输时过电压产生的机理。3.在分析雷电产生机理的基础上，依据现有的防雷标准对风电系统防雷进行分区，给出系统主要部件浪涌保护设计方法，为风机变流器选择了电源线和信号线浪涌保护器。 关键词 交直交变流器；电磁兼容EMI；滤波器；控制系统；浪涌保护 Electromagnetic Compatibility Design Of AC/DC/AC Converter Abstract It is a focus of attention of the world energy industry for improving the energy structure, utilization of renewable energy, reducing environmental pollution and improving power quality. Wind energy is A new force suddenly rises in energy sources and power industry for its characteristic of safety, credibility, no pollution, no expending fuel, short construction period, small scale, combines the net to run and so on. Due to a mass of power electronic equipments are used in wind power system, it is inescapable introduce electromagnetic compatibility issues, and make serious influence to the system, furthermore, it becomes graveness as the system power increase. The paper is aimed to the study of AC/DC/AC converter used in MW grade variable-speed constant-frequence doubly-fed wind-energy generation system. It analyses the origin, propagation path and susceptivity equipment of EMI noise in converter system firstly, then gives the electromagnetic compatibility design of the converter, these design include:1EMI filter for power line noise design of grid-side converter and common mode noise EMI filter design of rotor-side converter.2. the hardware on the converter control system is anti-jamming design, long-term transmission over-voltage problem, the use of long transmission line theory to analyze the transmission mechanism of Overvoltage. 3. in the analysis, based on the mechanism of lightning, lightning protection s