Shunt VSC Based Subsynchronous Damping Control for DFIG-based Wind Farms Connected to an MMC-HVDC System

2020 IEEE REGION 10 CONFERENCE (TENCON) Pub Date : 2020-11-16 DOI:10.1109/TENCON50793.2020.9293924

Fan Zhang, C. Yin, Haozhi Li, Xiaorong Xie, Chao Hong, Hao Yuan, Yongjun Liu

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引用次数: 1

Abstract

An emerging subsynchronous oscillation (SSO) associated with wind generators and voltage-sourced converter (VSC) based HVDC has been observed around the world. It is revealed that this new type of SSO is caused by the subsynchronous control interaction among power electronic converters and the grid. In this paper, the stability criterion of SSO is examined using frequency-dependent impedance models. Then a shunt VSC based subsynchronous damping control (SVSDC) has been proposed to reshape the impedance characteristic of the whole system and thus mitigate the SSO. The stability criterion and the control has been applied to a typical system with DFIG-based wind farms connected to a modular multilevel converter (MMC) based HVDC transmission. Impedance model based analyses as well as electromagnetic simulations have verified the effectiveness of the criterion and the control scheme. For its flexibility of capacity and deployment, the proposed SVSDC offers a promising option to address the SSO issues associated with wind generators and/or VSC-HVDCs.

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MMC-HVDC系统中基于dfig的风电场并联VSC的次同步阻尼控制

与风力发电机和电压源变流器相关的次同步振荡(SSO)已经在世界范围内被观察到。分析表明，这种新型的单点登录是由电力电子变流器与电网之间的次同步控制相互作用引起的。本文利用频率相关的阻抗模型研究了单点阵的稳定性判据。在此基础上，提出了一种基于并联VSC的次同步阻尼控制(SVSDC)，以重塑整个系统的阻抗特性，从而减轻SSO。将该稳定性判据和控制方法应用于一个典型的基于dfig的风电场与基于模块化多电平变流器(MMC)的高压直流输电系统。基于阻抗模型的分析和电磁仿真验证了准则和控制方案的有效性。由于其容量和部署的灵活性，拟议的SVSDC为解决与风力发电机和/或vcs - hvdc相关的SSO问题提供了一个有希望的选择。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2020 IEEE REGION 10 CONFERENCE (TENCON)

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