| 基于虚拟同步发电机控制的并网变流器同步频率谐振机理研究 |
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| 引用本文： | 王金华,王宇翔,顾云杰,李武华,何湘宁.基于虚拟同步发电机控制的并网变流器同步频率谐振机理研究[J].电源学报,2016,14(2):17-23. |
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| 作者姓名： | 王金华 王宇翔 顾云杰 李武华 何湘宁 |
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| 作者单位： | 浙江大学电气工程学院,浙江大学电气工程学院,浙江大学电气工程学院,浙江大学电气工程学院,浙江大学电气工程学院 |
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| 基金项目： | 国家重点基础研究发展计划项目(973计划) (2012CB215106) |
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| 摘 要： | 虚拟同步发电机控制策略是解决高渗透率新能源并网问题的有效方案之一。然而,不同于传统同步发电机,变流器模拟的虚拟同步发电机因其快速灵活的调节能力可能引发同步频率谐振现象。通过建立精确的虚拟同步发电机动态模型,分析得到同步频率谐振现象是由电磁磁链的动态过程引入;基于此谐振在控制参数设计不合理时会带来稳定性问题,提出2种阻尼控制的策略来抑制同步频率谐振现象。最后,通过搭建8 k W实验平台,验证了虚拟同步发电机中的同步频率谐振现象及所提阻尼控制策略的有效性。
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| 关 键 词： | 虚拟同步发电机 电磁暂态 同步频率谐振 阻尼控制 |
| 收稿时间： | 2015/9/18 0:00:00 |
| 修稿时间： | 2016/1/18 0:00:00 |
Synchronous Frequency Resonance in Grid-connected VSCs with Virtual Synchronous Generator Technology |
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| WANG Jinhu,WANG Yuxiang,GU Yunjie,LI Wuhua and HE Xiangning.Synchronous Frequency Resonance in Grid-connected VSCs with Virtual Synchronous Generator Technology[J].Journal of power supply,2016,14(2):17-23. |
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| Authors: | WANG Jinhu WANG Yuxiang GU Yunjie LI Wuhua and HE Xiangning |
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| Affiliation: | College of Electrical Engineering, Zhejiang University,College of Electrical Engineering, Zhejiang University,College of Electrical Engineering, Zhejiang University,College of Electrical Engineering, Zhejiang University,College of Electrical Engineering, Zhejiang University |
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| Abstract: | The Virtual Synchronous Generator (VSG) technology is an effective solution for distributed generations interfacing into the power system. Although the VSG is controlled to operate as a synchronous generator, the fast and flexible control capability of power electronics converters may give rise to some undesirable characteristics. It is investigated that electro-magnetic dynamics may induce synchronous frequency reso-nance in VSGs, which possibly leads to power oscillations. A rigorous dynamic VSG model is established to explore the synchronous fre-quency resonance phenomena. Based on this model, two damping control methods are proposed, which suppress the resonance through in-creasing the virtual inertia or adding virtual resistance. The effectiveness of the theoretical analysis is verified by experimental results. |
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| Keywords: | Virtual synchronous generator flux dynamic synchronous frequency resonance damping control |
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