孤岛微电网VSG-DSG并联系统交互功率振荡及其抑制策略

Q1 Engineering

Chinese Journal of Electrical Engineering Pub Date : 2022-12-01 DOI:10.23919/CJEE.2022.000043

Zhiyong Yuan;Xia Shen;Yingjie Tan;Zhenhua Tan;Jinyong Lei

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引用次数: 1

摘要

虚拟同步发电机(VSG)可以通过可再生能源和能源存储提供惯性支持。它通常在孤岛微电网中与柴油发电机(DSG)并联运行。然而，当负载波动时，并联系统中会出现不可预见的交互功率振荡。这些也可能烧坏VSG由于其低过流容量。研究了VSG-DSG并联系统功率振荡的机理和抑制策略。结果表明，交互功率振荡的主要原因是VSG和DSG之间的物理差异和参数不匹配。然后，推导了振动产生的消除条件。随后，提出了一种基于虚拟电感和动态互阻尼技术的综合抑制控制策略。最后，通过实验验证了所提方法的有效性。

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Interactive Power Oscillation and Its Suppression Strategy for VSG-DSG Paralleled System in Islanded Microgrid

A virtual synchronous generator (VSG) can provide inertial support through renewables and energy storage. It generally operates in parallel with a diesel generator (DSG) in an islanded microgrid. However, unforeseen interactive power oscillations occur in the paralleled system when loads fluctuate. These may also burn out the VSG owing to its low overcurrent capacity. The mechanism and suppression strategy of the power oscillation of a VSG-DSG paralleled system are investigated. It reveals that the interactive power oscillation is caused essentially by the physical difference and parameter mismatch between the VSG and DSG. Then, the elimination condition of oscillation generation is derived. Subsequently, a comprehensive suppression control strategy based on virtual inductance and dynamic mutual damping technology is proposed. Finally, the experimental results verify the effectiveness of the proposed method.

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