多逆变器并网系统中跟-构网型机组比例配置策略

施永; 蒋涛; 解宝; 张健; 苏建徽

doi:10.19912/j.0254-0096.tynxb.2024-1863

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太阳能学报 ›› 2026, Vol. 47 ›› Issue (4) : 20-30. DOI: 10.19912/j.0254-0096.tynxb.2024-1863

多逆变器并网系统中跟-构网型机组比例配置策略

施永^1,2, 蒋涛^1,2, 解宝^1,2, 张健^1,2, 苏建徽^1,2

作者信息 +

STRATEGY FOR RATIO ALLOCATION OF GRID-FOLLOWING AND GRID-FORMING UNITS IN A MULTI-INVERTER GRID-CONNECTED SYSTEM

Shi Yong^1,2, Jiang Tao^1,2, Xie Bao^1,2, Zhang Jian^1,2, Su Jianhui^1,2

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摘要

针对现有多跟网型（GFL）逆变器并联系统与弱电网之间的动态交互导致的稳定性问题,研究在多逆变器并网系统中构网型（GFM）逆变器对并网系统稳定性的影响,并提出一种多逆变器并网系统中跟-构网型机组比例配置策略。基于GFL逆变器功率传输单调性以及逆变器混合并联的准静态模型,讨论锁相环（PLL）和虚拟同步机（VSG）同步环间相互作用对GFL逆变器与GFM逆变器稳态工作点的影响,进而得到弱电网下多逆变器并网系统中同步稳定性与电网阻抗、电网电压之间的关系。所提策略针对不同的机组比例配置可推导出相应的电网阻抗临界值,进而根据不同的电网强度,给定不同的机组比例配置,确保多逆变器并网系统稳定运行。实验结果证明了所提方法的有效性。

Abstract

Aiming at the stability prob-lems caused by the dynamic interactions between the existing parallel system of multi-grid-following （GFL） inverters and the weak grid, we study the influence of grid-forming （GFM） inverters on the stability of the grid-connected system in a multi-inverter grid-connected system, and propose a strategy for the proportional allocation of grid-following and grid-forming units in a multi-inverter grid-connected system. Based on the monotonicity of the power transfer of GFL inverters and the quasi-static model of mixed parallel connection of inverters, the influence of the interaction between the phase-locked loop （PLL） and the virtual synchronous machine （VSG） synchronization loop on the steady-state operating point of the GFL inverters and the GFM inverters is discussed to obtain the re-lationship between the synchronization stability, grid impedance and grid voltage in the grid-connected multivariate inverter system under a weak grid. The proposed strategy can derive the corresponding critical values of grid impedance for different unit ratio configurations, and then different unit ratio configurations are given according to different grid strengths to ensure the stable operation of the grid-connected multi-inverter system. The validity of the proposed method was experimentally verified.

导出引用

施永, 蒋涛, 解宝, 张健, 苏建徽. 多逆变器并网系统中跟-构网型机组比例配置策略[J]. 太阳能学报. 2026, 47(4): 20-30 https://doi.org/10.19912/j.0254-0096.tynxb.2024-1863

Shi Yong, Jiang Tao, Xie Bao, Zhang Jian, Su Jianhui. STRATEGY FOR RATIO ALLOCATION OF GRID-FOLLOWING AND GRID-FORMING UNITS IN A MULTI-INVERTER GRID-CONNECTED SYSTEM[J]. Acta Energiae Solaris Sinica. 2026, 47(4): 20-30 https://doi.org/10.19912/j.0254-0096.tynxb.2024-1863

中图分类号： TM464

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