Sub‑synchronous resonance in grid‑forming PMSGs connected to series‑compensated networks

Han Jiang; Zhengchun Du; Xiaotian Yuan; Jinlong Han

Sub‑synchronous resonance in grid‑forming PMSGs connected to series‑compensated networks

Vol. 24, No. 4, pp. 618-630, Apr. 2024

10.1007/s43236-023-00748-3

Sub-synchronous resonance

Permanent magnet synchronous generators

DC voltage synchronization control

Grid-forming control

SSR damping

Abstract

The sub-synchronous resonance (SSR) characteristics and countermeasures of grid-forming permanent magnet synchronous generators (PMSGs) controlled by DC voltage synchronization control (DVSC) are investigated in this paper. First, smallsignal models of two PMSGs connected to a series-compensated network are established, where a recently developed gridforming control, i.e., DVSC is applied. Then, a modal-analysis method is conducted to evaluate the impacts of the control parameters, series compensation level (SCL), and electrical distances on stability. It is interesting to see that PMSGs with DVSC exhibit unstable SSR like traditional synchronous generators. Moreover, the dominant wind turbine (WT) is investigated using participate factor analysis. Then, a simple but effective SSR damping controller (SSRDC) is designed using feedforward control signals, which is only activated when SSR occurs. It is shown that the designed controller can provide strong damping support for SSR suppression. Electromagnetic transient simulations are performed in different scenarios to find the unstable SSR conditions, as well as to verify the correctness of the SSR analysis and the effectiveness of the proposed SSR damping scheme.

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Cite this article

[IEEE Style]

H. Jiang, Z. Du, X. Yuan, J. Han, "Sub‑synchronous resonance in grid‑forming PMSGs connected to series‑compensated networks," Journal of Power Electronics, vol. 24, no. 4, pp. 618-630, 2024. DOI: 10.1007/s43236-023-00748-3.

[ACM Style]

Han Jiang, Zhengchun Du, Xiaotian Yuan, and Jinlong Han. 2024. Sub‑synchronous resonance in grid‑forming PMSGs connected to series‑compensated networks. Journal of Power Electronics, 24, 4, (2024), 618-630. DOI: 10.1007/s43236-023-00748-3.