新能源并网三电平逆变器中低功率区间效率优化

发布时间：2019-03-15 08:02

【摘要】：三电平逆变器因为电压应力只有两电平逆变器的一半,并且具有损耗小、谐波含量低的特点,所以在风能、太阳能等新能源发电系统中得到了越来越多的应用和研究。文中从新能源的功率随机波动特点出发,首先,评估了应用于新能源系统的传统三电平逆变器拓扑的损耗特点,然后,针对应用于光伏发电系统的三电平并网逆变器提出了硬件和控制策略上的改进,最后,利用一台样机验证了所提出的改进措施。试验证明,所提改进措施能够有效改善和提高三电平逆变器的效率,尤其是在中低功率范围内的效率。
[Abstract]:Because the voltage stress of three-level inverter is only half of that of two-level inverter, and has the characteristics of low loss and low harmonic content, so it has been more and more applied and researched in new energy generation systems such as wind energy, solar energy and so on. Based on the random fluctuation characteristics of new energy sources, the loss characteristics of the traditional three-level inverter topology applied to new energy systems are evaluated firstly. Then, the loss characteristics of the traditional three-level inverter topology used in the new energy system are evaluated. The hardware and control strategies of the three-level grid-connected inverter used in photovoltaic power generation system are improved. Finally, a prototype is used to verify the proposed improvement measures. The experimental results show that the proposed improvement measures can effectively improve and improve the efficiency of three-level inverter, especially in the range of low and medium power.
【作者单位】：电力传输与功率变换控制教育部重点实验室(上海交通大学);上海交通大学密西根学院;
【基金】：国家自然科学基金资助项目(51177100)~~
【分类号】：TM464

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