A novel high-efficiency inverter for stand-alone and grid-connected systems

2008 3rd IEEE Conference on Industrial Electronics and Applications Pub Date : 2008-06-03 DOI:10.1109/ICIEA.2008.4582577

Rou-Yong Duan, Chao Chang

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引用次数: 9

Abstract

This study presents a newly designed inverter circuit for photovoltaic (PV) power generation systems. A controllable current source supplies the filter capacitors and loads with high frequency switching to integrate the output sine wave voltage. Since the resonant inductor and the filter capacitor are connected in parallel, the series diodes of the full-bridge switches can be omitted. Furthermore, a coupled-inductor with a low volume is utilized to reduce the circulating energy and clamped the voltage stress of the devices, regardless of whether operation is in continuous conduction mode. The experimental waveforms are provided to demonstrate the soft-switching properties of all the devices. Additionally, a normal rated power with 110 V -1 kW - 60 Hz, which can be operated at stand-alone and grid-connected modes, is provided to show the effectiveness of the output voltage with low distortion, fast dynamic regulating speed and insensitivity to load variation, even under nonlinear loads. Experimental results that the maximum power inverter efficiency exceeds 97%, and the total harmonic distortion for various load conditions falls within 2%.

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一种适用于单机和并网系统的新型高效逆变器

本文提出了一种新型的光伏发电系统逆变电路。一个可控电流源为滤波电容器和负载提供高频开关，以集成输出正弦波电压。由于谐振电感和滤波电容并联，所以全桥开关的串联二极管可以省略。此外，利用一个小体积的耦合电感来减少循环能量并箝位器件的电压应力，无论其是否处于连续导通模式。实验波形证明了所有器件的软开关特性。此外，还提供了110 V -1 kW - 60 Hz的正常额定功率，可以在单机和并网模式下运行，以显示输出电压的有效性，其失真小，动态调节速度快，即使在非线性负载下也对负载变化不敏感。实验结果表明，该逆变器的最大功率效率超过97%，各种负载条件下的总谐波失真在2%以内。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2008 3rd IEEE Conference on Industrial Electronics and Applications

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