SVPWM风电并网逆变器电能质量分析与仿真.docVIP

SVPWM风电并网逆变器电能质量分析与仿真 摘要：随着全球能源危机和环境污染的日益严重，开发和利用可持续的清洁再生能源势在必行，风电并网是解决这一问题的方式之一。并网逆变器作为可再生能源与电网的接口，发挥着重要的作用，其性能直接影响到能源利用效率和电能质量。本论文主要介绍了基于电网电压定向的三相并网逆变器系统，阐述了其拓扑结构，工作原理以及实现方式。介绍了其在三相静止坐标系、两相静止坐标系和两相旋转坐标系的转换。利用基于电网电压的矢量控制方法对变换器进行控制，进行 坐标系下的电流解耦，控制系统中有功无功电流，完成系统参数设计。搭建电压型PWM变换器仿真模型，并且采用空间矢量调制（SVPWM）技术进行仿真实验，阐述零矢量集中和分散的不同。分析和研究滤波器参数对于电能质量的影响。5880 关键词： SVPWM；电网电压定向；电能质量；风电并网；MATLAB/SIMULINK Power quality analysis and simulation of wind power grid-connected inverter Abstract: With the global energy crisis and environmental pollution is worsening, development and use of sustainable clean renewable energy is imperative, wind power is the solution to this problem one way. And inverter as a renewable energy and grid interface plays an important role in its performance directly affects the energy efficiency and power quality. This paper describes the on grid voltage orientation phase grid-connected inverter system, described its topological structure, working principle and implementation. This paper introduces its three-phase stationary coordinate system, two-phase and two-phase stationary coordinate system rotating coordinate system conversion. Use based on the grid voltage vector control method of the converter to control the coordinate system under the current decoupling, the control system of active and reactive current, complete system design parameters. Build a voltage type PWM inverter simulation model, and using space vector modulation (SVPWM) technology for simulation experiments to explain the zero vectors centralized and decentralized different. Analysis and study of filter parameters for the power quality. 4.2逆变器滤波器的设计32 4.2.1满足四象限运行时的电感设计33 4.2.2电能质量的分析与研究38 本章小结41 5总结与展望42 致谢43 参考文献44 1绪论 1.1课题背景 随着世界经济和社会的不断发展，能源的消耗不断增加，煤炭、石油、天然气等传统的不可再生的能源被大量地消耗，地球能源储量逐渐枯竭。而工业废水、汽车尾气等造成的酸雨、沙尘暴、温室效应、水土流失等恶劣现象不断加剧，环境的恶化进一步导致了干旱、洪涝、飓风等严重的自然灾害，时刻威胁着人类的生命和财产安全。能源和环境问题成为了当今世界必须应对的两大重要课题。可持续发展是人类生存的必要条件。因此节约能源，提高能源利用效率，尽可能多的利用洁净能源来替代高含碳量的矿物燃料，是各国能源建设遵循的原则。太阳能，水能，风能和潮汐都是可再生的