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首页> 外文期刊>Smart Grid, IEEE Transactions on >Distributed Active Synchronization Strategy for Microgrid Seamless Reconnection to the Grid Under Unbalance and Harmonic Distortion
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Distributed Active Synchronization Strategy for Microgrid Seamless Reconnection to the Grid Under Unbalance and Harmonic Distortion

机译：不平衡和谐波畸变下微电网无缝重新接入电网的分布式主动同步策略

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摘要

Microgrids can operate in both grid-connected and islanded modes. In order to seamlessly transfer from islanded to grid-connected modes, it is necessary to synchronize microgrid voltage and frequency, and phase to the main grid. However, since the microgrid is often based on power electronic converters, the synchronization process is quite different compared with the quasi-synchronism control in conventional power systems. First, in order to address this concern, the microgrid synchronization criteria are derived. Based on these criteria, a novel distributed active synchronization strategy is proposed, which takes into account not only the fundamental component, but also positive and negative sequences of the harmonic components. This way, a seamless reconnection to the main grid can be performed. The proposed method is implemented in the secondary control level of a hierarchical control structure. Real-time hardware-in-the-loop results show the feasibility of the proposed technique.
机译：微电网可以在并网和孤岛模式下运行。为了从孤岛模式无缝转换到并网模式，必须使微电网的电压和频率以及相位与主电网同步。但是，由于微电网通常基于电力电子转换器，因此与传统电力系统中的准同步控制相比，同步过程有很大不同。首先，为了解决这个问题，推导了微电网同步标准。基于这些标准，提出了一种新颖的分布式主动同步策略，该策略不仅考虑了谐波分量的基本成分，而且考虑了谐波成分的正负序列。这样，可以执行到主网格的无缝重新连接。所提出的方法在分级控制结构的次级控制级别中实现。实时硬件在环结果表明了该技术的可行性。

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