Subsynchronous Oscillation Research of LCC-HVDC Receiving End System with Large-scale Renewable Power Generation

2022 IEEE 5th International Electrical and Energy Conference (CIEEC) Pub Date : 2022-05-27 DOI:10.1109/CIEEC54735.2022.9846562

Buyang Du, Jianhang Zhu, Jiabing Hu, Ze-Hong Guo, Dejun Shao, Youping Xu, Mengxuan Shi

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Abstract

The line-commutated-converter (LCC) based high voltage direct current (HVDC), and renewable power generation have developed rapidly in central China. However, the risk of subsynchronous oscillation (SSO) for this typical LCC-HVDC receiving end system with large-scale renewable power generations (LCCre-RPGs) is unclear. In this paper, a small-signal model of LCCre-RPGs is constructed. The renewable power generations are simulated by a permanent magnet synchronous generator (PMSG) and a doubly-fed induction generator (DFIG). Then, the interaction between LCC-HVDC and renewable power generations is analyzed through the eigenvalue analysis and participation factor analysis. Moreover, the interaction may lead to the risk of SSO. Finally, the influence of controller parameters on the SSO modes is investigated in detail, which provides theoretical support for optimizing relevant parameters. The time-domain simulation of the original nonlinear model verifies the above analysis results.

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大型可再生发电LCC-HVDC接收端系统的次同步振荡研究

以线路换流变换器(LCC)为基础的高压直流(HVDC)和可再生能源发电在华中地区发展迅速。然而，对于这种典型的大型可再生能源发电(lccre - rpg)的LCC-HVDC接收端系统，其次同步振荡(SSO)风险尚不清楚。本文建立了lccre - rpg的小信号模型。采用永磁同步发电机(PMSG)和双馈感应发电机(DFIG)对可再生能源发电进行了仿真。然后，通过特征值分析和参与因子分析，分析了LCC-HVDC与可再生能源发电之间的相互作用。此外，交互还可能导致SSO的风险。最后，详细研究了控制器参数对单点登录模式的影响，为优化相关参数提供了理论支持。对原非线性模型的时域仿真验证了上述分析结果。

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2022 IEEE 5th International Electrical and Energy Conference (CIEEC)

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