| 引用本文: | 周 柯,金庆忍,莫枝阅,等.虚拟同步机并网运行下电网谐波抑制和故障穿越策略[J].电力系统保护与控制,2024,52(9):166-173. |
| ZHOU Ke,JIN Qingren,MO Zhiyue,et al.Grid harmonic suppression and fault ride-through strategies for a virtual synchronousgenerator in grid-connected operation[J].Power System Protection and Control,2024,52(9):166-173 |
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| 摘要: |
| 广西电网有限责任公司电力科学研究院，广西 南宁 530023 |
| 关键词: 虚拟同步发电机 谐波电流 故障电流 虚拟阻抗 故障穿越 电能质量 |
| DOI：10.19783/j.cnki.pspc.230932 |
| 分类号: |
| 基金项目:南方电网公司科技项目资助(GXKJXM20200420)；广西重点研发计划项目资助(桂科AB22035003) |
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| Grid harmonic suppression and fault ride-through strategies for a virtual synchronousgenerator in grid-connected operation |
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ZHOU Ke, JIN Qingren, MO Zhiyue, LU Baihua
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Electric Power Research Institute, Guangxi Power Grid Corporation, Nanning 530023, China
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| Abstract: |
| The problem of traditional impedance-based harmonic current suppression methods exacerbating virtual synchronous generator (VSG) fault current is highlighted when the power grid experiences a symmetrical fault transient. The principle of the traditional impedance reshaping-based harmonic current suppression method is introduced. Based on the VSG harmonic impedance model, the mechanism by which this traditional method exacerbates VSG fault current during asymmetric faults in the power grid is revealed. Based on this, a method is proposed for the coordinated suppression of VSG harmonic current and fault current. The method introduces a virtual inductance to reshape the equivalent impedance from the grid fault point to the VSG to achieve coordinated suppression in VSG grid-connected operation. This approach improves power quality and enhances the fault ride-through capability of VSG. Finally, the correctness and effectiveness of the proposed control strategy are verified through simulations. |
| Key words: virtual synchronous generator harmonic current fault current virtual impedance fault ride-through power quality |
