Operation of Single-phase Grid-Connected Inverters with Large DC Bus Voltage Ripple
Operation of Single-phase Grid-Connected Inverters with Large DC Bus Voltage Ripple
复制标题
大直流母线电压纹波单相并网逆变器的运行
DOI：
10.1109/epc.2007.4520325
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发表时间：
2007
期刊：
影响因子：
--
通讯作者：
L. Lopes
中科院分区：
文献类型：
--
作者：
N. Ninad;L. Lopes
分布式能源（DER）的单相并网电压源逆变器（VSI）通常采用大型电解电容器。它们体积庞大且使用寿命相对较短，这促使它们被更小的薄膜型电容器所取代。本文讨论了由此产生的问题，例如增加的直流母线电压纹波和较小的有功功率变化惯性。前者往往会增加注入电流的低次谐波，当增加电压环路的带宽以补偿后者时，这将变得更具挑战性。提出了一种基于电压纹波估计器的解决方案，并通过仿真结果进行了验证。
Large electrolytic capacitors are usually employed in single-phase grid-connected voltage source inverters (VSI) of distributed energy resources (DER). They are bulky and have a relatively short life time what motivates their replacement by smaller film type capacitors. Resulting issues such as the increased dc bus voltage ripple and smaller inertia to active power variations are discussed in this paper. The former tends to increase the low order harmonics of the injected current, what becomes an even more challenging matter when the bandwidth of the voltage loop is increased to compensate for the latter. A solution based on a voltage ripple estimator is presented and is verified by means of simulation results.