Control Methodologies to Mitigate and Regulate Second-Order Ripples in DC–AC Conversions and Microgrids: A Brief Review
Control Methodologies to Mitigate and Regulate Second-Order Ripples in DC–AC Conversions and Microgrids: A Brief Review
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DOI：
10.3390/en16020817
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发表时间：
2023-01
期刊：
影响因子：
3.2
通讯作者：
Shivam Chaturvedi;Mengqi Wang;Yaoyu Fan;D. Fulwani;G. Hollweg;S. Khan;Wencong Su
中科院分区：
文献类型：
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作者：
Shivam Chaturvedi;Mengqi Wang;Yaoyu Fan;D. Fulwani;G. Hollweg;S. Khan;Wencong Su
在任何DC-AC功率转换期间，电压和电流都会出现二阶纹波。这些转换发生在电压源逆变器（VSI）、电流源逆变器（CSI）和各种单级逆变器（SSI）拓扑中。当在AC和DC微电网之间存在互连时或者当AC负载连接到微电网的DC总线时，二阶纹波导致振荡源节点电流和DC总线电压。二阶纹波对电源和蓄电池储能有各种不利影响。在蓄电池中，它们导致电极的耗尽。它们还导致转换器或逆变器组件中的应力。这可能会导致组件的故障，从而影响系统的可靠性。此外，二阶涟漪电流（SRC）导致风力涡轮机中的涟漪转矩并导致机械应力。SRC导致光伏板的温度升高。PV板温度的升高会导致发电量的减少。此外，二阶电压和电流振荡导致PV板中的变化的最大功率点。因此，可能无法从中提取最大功率。为了减轻SRC，需要加大组件的尺寸。为了提高源、存储和转换器组件的寿命，SRC必须被减轻或保持在期望的限制内。在文献中，已经提出了不同的方法来减轻和调节这些二阶涟漪分量。本文综述了二阶纹波对不同源的不同影响以及抑制纹波的方法。不同的有功功率解耦方法，虚拟阻抗为基础的方法，脉宽调制为基础的信号注入方法，和控制方法中采用的分布式发电方法的直流微电网。涟漪控制方法的应用范围从SSI和VSI等单个转换器到互连转换器网络。此外，在分布式发电环境中的虚拟阻抗控制和涟漪缓解领域的不同挑战进行了讨论。本文对DC-AC变换器和微电网中二阶纹波的抑制和调节方法进行了综述。
Second-order ripples occur in the voltage and current during any DC–AC power conversion. These conversions occur in the voltage source inverters (VSIs), current source inverters (CSIs), and various single-stage inverters (SSIs) topologies. The second-order ripples lead to oscillating source node currents and DC bus voltages when there is an interconnection between the AC and DC microgrids or when an AC load is connected to the DC bus of the microgrid. Second-order ripples have various detrimental effects on the sources and the battery storage. In the storage battery, they lead to the depletion of electrodes. They also lead to stress in the converter or inverter components. This may lead to the failure of a component and hence affect the reliability of the system. Furthermore, the second-order ripple currents (SRCs) lead to ripple torque in wind turbines and lead to mechanical stress. SRCs cause a rise in the temperature of photovoltaic panels. An increase in the temperature of PV panels leads to a reduction in the power generated. Furthermore, the second-order voltage and current oscillations lead to a varying maximum power point in PV panels. Hence, the maximum power may not be extracted from it. To mitigate SRCs, oversizing of the components is needed. To improve the lifespan of the sources, storage, and converter components, the SRCs must be mitigated or kept within the desired limits. In the literature, different methodologies have been proposed to mitigate and regulate these second-order ripple components. This manuscript presents a comprehensive review of different effects of second-order ripples on different sources and the methodologies adopted to mitigate the ripples. Different active power decoupling methodologies, virtual impedance-based methodologies, pulse width modulation-based signal injection methodologies, and control methods adopted in distributed power generation methods for DC microgrids have been presented. The application of ripple control methods spans from single converters such as SSIs and VSIs to a network of interconnected converters. Furthermore, different challenges in the field of virtual impedance control and ripple mitigation in distributed power generation environments are discussed. This paper brings a review regarding control methodologies to mitigate and regulate second-order ripples in DC–AC conversions and microgrids.