Synchronization Stability of Hybrid Power Systems Integrated with Grid-Forming Inverters and Grid-Following Inverters

CPSS Transactions on Power Electronics and Applications Pub Date : 2024-10-18 DOI:10.24295/CPSSTPEA.2024.00024

Dian Lu;Jingrong Yu;Xiawei Lu;Jiaqi Yu

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Abstract

This paper investigates the synchronization stability of hybrid power systems integrated with grid-forming (GFM) inverters and grid-following (GFL) inverters. In hybrid power systems, the interactions between GFM and GFL inverters bring about challenges for the synchronization stability analysis. To address this issue, a fourth-order synchronization model considering controller interactions is established. Then, the influence of inter-actions on the stable equilibrium point (SEP) and the synchronization process is fully clarified. It is found that interactions are detrimental to the SEP of GFM inverters but beneficial to the SEP of GFL inverters. For synchronization processes, the instability and stabilization caused by controller interactions are presented, indicating the important effect on the synchronization process. In addition, suggestions for controller design to improve synchronization dynamics through controller interactions are provided. Simulation results validate these findings.

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并网逆变器与随网逆变器集成的混合电力系统同步稳定性研究

研究了并网逆变器和随网逆变器组成的混合电力系统的同步稳定性问题。在混合电力系统中，GFM和GFL逆变器之间的相互作用给同步稳定性分析带来了挑战。为了解决这一问题，建立了考虑控制器交互的四阶同步模型。然后，充分阐明了相互作用对稳定平衡点（SEP）和同步过程的影响。研究发现，相互作用对GFM逆变器的SEP是不利的，而对GFL逆变器的SEP是有利的。对于同步过程，给出了控制器交互引起的不稳定性和镇定性，表明了控制器交互对同步过程的重要影响。此外，还提出了通过控制器交互改善同步动力学的控制器设计建议。仿真结果验证了这些发现。

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来源期刊

CPSS Transactions on Power Electronics and Applications

CiteScore

8.80

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0.00%

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