SMALL-SIGNAL VOLTAGE STABILITY ANALYSIS OF MMC-HVDC SYSTEMS SUPPLYING SYSTEM WITH INDUCTION MOTOR LOAD

Hua Wen; Wang Longfei; Zhou Zhengyang; Xue Yicheng; Zhang Zheren; Xu Zheng

doi:10.19912/j.0254-0096.tynxb.2022-0863

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Acta Energiae Solaris Sinica ›› 2023, Vol. 44 ›› Issue (10) : 28-37. DOI: 10.19912/j.0254-0096.tynxb.2022-0863

SMALL-SIGNAL VOLTAGE STABILITY ANALYSIS OF MMC-HVDC SYSTEMS SUPPLYING SYSTEM WITH INDUCTION MOTOR LOAD

Hua Wen¹, Wang Longfei¹, Zhou Zhengyang², Xue Yicheng³, Zhang Zheren³, Xu Zheng³

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Abstract

The modular multilevel converter-based high voltage direct current （MMC-HVDC） systems for large-scale renewable energy integration can change the small-signal voltage stability mechanism of the system. Therefore, this paper studies the small-signal voltage stability mechanism of MMC-HVDC systems with induction motor loads. The linearized state-space model of the system is developed, and key factors that affect the small-signal voltage stability are studied. According to the eigenvalue and participation factor analysis, reducing the proportional gains of the MMC controller and the electrical distance between MMC and induction motors can both threaten the small-signal voltage stability. However, increasing the electrical distance between MMC and induction motors can lead to the missing of stable equilibrium points. The electromagnetic transient simulation model based on PSCAD/EMTDC verifies the accuracy of the small-signal model and the effectiveness of the conclusions.

Key words

renewable energy / voltage stability / induction motors / HVDC power transmission / small-signal stability

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Hua Wen, Wang Longfei, Zhou Zhengyang, Xue Yicheng, Zhang Zheren, Xu Zheng. SMALL-SIGNAL VOLTAGE STABILITY ANALYSIS OF MMC-HVDC SYSTEMS SUPPLYING SYSTEM WITH INDUCTION MOTOR LOAD[J]. Acta Energiae Solaris Sinica. 2023, 44(10): 28-37 https://doi.org/10.19912/j.0254-0096.tynxb.2022-0863

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