虚拟同步机动态特性提升方法的网侧频率扰动分析及振荡抑制

杨博; 陈炜彬; 李豪; 李劲松; 陆帅

doi:10.19912/j.0254-0096.tynxb.2024-2403

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太阳能学报 ›› 2026, Vol. 47 ›› Issue (5) : 110-122. DOI: 10.19912/j.0254-0096.tynxb.2024-2403

虚拟同步机动态特性提升方法的网侧频率扰动分析及振荡抑制

杨博¹, 陈炜彬², 李豪¹, 李劲松¹, 陆帅¹

作者信息 +

GRID FREQUENCY DISTURBANCE REJECTION ENHANCEMENT FOR POWER LOOP CONTROL OF VIRTUAL SYNCHRONOUS GENERATORS

Yang Bo¹, Chen Weibin², Li Hao¹, Li Jinsong¹, Lu Shuai¹

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文章历史 +

摘要

针对虚拟同步机（VSG）功率控制现有研究主要面向功率指令突变工况,而对电网频率波动下暂态响应特性关注不足的问题,该文开展了网侧频率扰动响应分析与振荡抑制方法研究。首先,该文分析现有多种典型的VSG功率控制暂态特性改进策略,发现其在电网频率扰动下的暂态特性恶化问题,揭示问题实质为现有改进方案中的极零点补偿在电网频率响应控制回路中的不同等效位置所造成的不同传递函数特性,并有针对性地提出极零点补偿在环路中新的前向通道位置的设计,以同时实现VSG在功率指令扰动和电网频率扰动下改善暂态特性;对于补偿器前向通道新位置的具体实现,进一步提出加入虚拟阻抗幅频特性的VSG功率传输模型重塑方法。相较于传统VSG和现有方案,所提方案能够在改善功率响应动态特性的同时进一步改善VSG系统在网侧频率波动下的暂态性能。最后,搭建20 kW的实验平台和背靠背网侧频率突变发生器,并通过与现有典型的VSG改进策略的对比测试,在极端网侧频率突变测试条件下验证了所提方案的有效性。

Abstract

To address the problem that existing studies on virtual synchronous generator （VSG） power control are mainly oriented toward sudden power command change conditions, while insufficient attention has been paid to the transient response characteristics under grid frequency fluctuations, this paper conducts research on grid frequency disturbance response analysis and oscillation suppression methods. First, this paper analyzes various existing typical improvement strategies, and points out that the existing schemes change the transfer function of the grid frequency response loop, thus deteriorating the transient response characteristics under grid frequency disturbances. Based on the analysis, from the perspective of reconstructing the power transmission model, this paper proposes a method for reshaping the VSG power transmission model by adding the amplitude-frequency characteristics to the virtual impedance. Compared with traditional VSG and existing schemes, the proposed scheme can not only improve the power response characteristics but also enhance the ability to resist grid frequency disturbance. Finally, this paper establishes a 20 kW experimental platform and a back-to-back grid-side frequency step generator to verify the effectiveness of the proposed scheme under the above two working conditions.

导出引用

杨博, 陈炜彬, 李豪, 李劲松, 陆帅. 虚拟同步机动态特性提升方法的网侧频率扰动分析及振荡抑制[J]. 太阳能学报. 2026, 47(5): 110-122 https://doi.org/10.19912/j.0254-0096.tynxb.2024-2403

Yang Bo, Chen Weibin, Li Hao, Li Jinsong, Lu Shuai. GRID FREQUENCY DISTURBANCE REJECTION ENHANCEMENT FOR POWER LOOP CONTROL OF VIRTUAL SYNCHRONOUS GENERATORS[J]. Acta Energiae Solaris Sinica. 2026, 47(5): 110-122 https://doi.org/10.19912/j.0254-0096.tynxb.2024-2403

中图分类号： TM464

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