考虑频率限幅器的光伏逆变器并网同步稳定性分析

龚迪阳; 陈琼; 李志浩; 唐雅洁; 时晓洁

doi:10.19912/j.0254-0096.tynxb.2024-2365

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太阳能学报 ›› 2026, Vol. 47 ›› Issue (5) : 660-670. DOI: 10.19912/j.0254-0096.tynxb.2024-2365

考虑频率限幅器的光伏逆变器并网同步稳定性分析

龚迪阳¹, 陈琼², 李志浩¹, 唐雅洁¹, 时晓洁²

作者信息 +

SYNCHRONIZATION STABILITY ANALYSIS OF GRID-CONNECTED PV CONVERTERS CONSIDERING FREQUENCY LIMITER

Gong Diyang¹, Chen Qiong², Li Zhihao¹, Tang Yajie¹, Shi Xiaojie²

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文章历史 +

摘要

该文考虑频率限幅器的非线性,研究了多工况下光伏逆变器并网系统的同步稳定性。首先,构建计及频率限幅器的系统负反馈线性模型。在此模型基础上,面向限幅前的稳定与失稳工况,利用描述函数法揭示限幅后等幅振荡的内在机理,并定量计算不同限幅值和控制参数下的振荡幅值和频率。最后,搭建Typhoon HIL604半实物仿真测试平台,算例结果验证了限幅触发后分析方法的准确性和有效性。

Abstract

Frequency limiters are typically applied in phase-locked loop （PLL） to prevent large-scale desynchronization between converters and the grid. This study considers the nonlinear characteristics of frequency limiters and investigates the synchronization stability of grid-connected PV converter systems under various operating conditions. Firstly, a negative feedback linear model of the system incorporating the frequency limiter is developed. Based on this model, for both stable and unstable conditions before limiter activation, the describing function method is employed to reveal the intrinsic mechanism of sustained oscillations after limiter activation. The oscillation amplitude and frequency under different limiting values and control parameters are quantitatively calculated. Finally, a hardware-in-the-loop simulation platform based on Typhoon HIL604 is established, and the case-study results verify the accuracy and effectiveness of the proposed analysis method after the limiter is triggered.

导出引用

龚迪阳, 陈琼, 李志浩, 唐雅洁, 时晓洁. 考虑频率限幅器的光伏逆变器并网同步稳定性分析[J]. 太阳能学报. 2026, 47(5): 660-670 https://doi.org/10.19912/j.0254-0096.tynxb.2024-2365

Gong Diyang, Chen Qiong, Li Zhihao, Tang Yajie, Shi Xiaojie. SYNCHRONIZATION STABILITY ANALYSIS OF GRID-CONNECTED PV CONVERTERS CONSIDERING FREQUENCY LIMITER[J]. Acta Energiae Solaris Sinica. 2026, 47(5): 660-670 https://doi.org/10.19912/j.0254-0096.tynxb.2024-2365

中图分类号： TM464

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