摘****要
与传统逆变器相比，工频正弦波逆变器具有电容电压应力低的优点。但是工频正弦波逆变器存在开关器件电压应力大和开关频率高的缺陷。将SPWM调制策略应用于工频正弦波逆变器，并在不产生电流纹波的条件下实现了最大调制度，不仅能够减小开关器件电压应力，而且能够降低开关频率。推导出SPWM调制下最大恒定直通时间及其与调制度的关系，给出直通注入方法。仿真和实验结果验证了SPWM最大恒定升压调制策略的有效性。
工频正弦波逆变器应用广泛，比如电子设备、电力系统、工业等行业，都会运用到工频正弦波逆变器系统或工具。更高效率和更高精度的工频正弦波逆变器一直是研究的热点。在我们日常生活中，工频正弦波逆变器随处可见，因为其相比其他的控制方式而言，运行稳定且控制精度较高等优势，最重要的是工频正弦波逆变器在并网控制等方面具有很好的优势。随着自动控制技术和微电子技术的不断革新，目前的技术水平为实现工频正弦波逆变器调节控制打下坚实的基础，提供扎实的理论依据。
本次设计主要以220V工频正弦波逆变器控制系统设计应用作为研究背景，运用MATLAB仿真工具搭建相应的仿真模型。该模型利用MATLAB软件中的模块库，建立了工频正弦波逆变器在电力系统应用中的系统仿真模型，通过 MATLAB仿真软件搭建仿真模型,运行仿真，并对工频正弦波逆变器的仿真结果进行了分析。利用MATLAB软件Simulink工具箱中模块针对三相Z源逆变器最大升压SPWM技术搭建了仿真模型。最后针对实例进行仿真验证，理论计算值和仿真结果的一致性证明了所搭建仿真模型的正确性，从而为同行从业人员或学习者提供可靠的参照。
关键词：工频正弦波逆变器，SPWM，建模与仿真 ，MATLAB
Abstract
Compared with traditional inverters, power frequency sine wave inverters have the advantage of low capacitance voltage stress. However, the power frequency sine wave inverter has the defects of high voltage stress and high switching frequency. The SPWM modulation strategy is applied to the power frequency sine wave inverter, and the maximum modulation system is realized without current ripple, which can not only reduce the voltage stress of the switching device, but also reduce the switching frequency. The maximum constant through-through time and its relation with the modulation system under SPWM modulation are deduced, and the through-through injection method is given. Simulation and experimental results show that the maximum constant boost modulation strategy of SPWM is effective.
Power frequency sine wave inverter is widely used, such as electronic equipment, power system, industry and other industries, will be used to power frequency sine wave inverter system or tools. The power frequency sine wave inverter with higher efficiency and higher precision has always been the focus of research. In our daily life, the power frequency sine wave inverter can be seen everywhere, because compared with other control methods, stable operation and higher control precision advantages, the most important is the power frequency sine wave inverter has a good advantage in grid-connected control. With the continuous innovation of automatic control technology and microelectronic technology, the current technical level for the realization of power frequency sine wave inverter regulation control to lay a solid foundation, provide a solid theoretical basis.
This design mainly uses 220V power frequency sine wave inverter control system design and application as the research background, using MATLAB simulation tools to build the corresponding simulation model. This model uses the module library of MATLAB software to establish the system simulation model of the application of power frequency sine wave inverter in the power system. The simulation model is built by MATLAB simulation software, and the simulation results of the power frequency sine wave inverter are analyzed. A simulation model for maximum boost SPWM technology of three-phase Z-source inverter was built by using the module of MATLAB software Simulink toolbox. Finally, the simulation is verified by an example. The consistency between the theoretical calculation values and the simulation results proves the correctness of the simulation model, so as to provide a reliable reference for fellow practitioners or learners.
Key words: Power frequency sine wave inverter, SPWM, Modeling and simulation, MATLAB
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https://download.csdn.net/download/weixin_45905610/88597450
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