Low-frequency oscillation suppression using flexible DC grid based on state feedback supplementary damping control

NI Binye; XIANG Wang; LU Xiaojun; WEN Jinyu

doi:10.16081/j.issn.1006-6047.2019.03.007

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Low-frequency oscillation suppression using flexible DC grid based on state feedback supplementary damping control

更新时间：2025-04-25

- Low-frequency oscillation suppression using flexible DC grid based on state feedback supplementary damping control
- Vol. 39, Issue 3, Pages: 45-50+57(2019)
- 作者机构：
  
  华中科技大学电气与电子工程学院强电磁工程与新技术国家重点实验室
- 作者简介：
- 基金信息：
- DOI：10.16081/j.issn.1006-6047.2019.03.007
  CLC： TU712;TM721.1
- Published：2019
- 稿件说明：
移动端阅览
[1]倪斌业,向往,鲁晓军,文劲宇.基于状态反馈附加阻尼控制的柔性直流电网抑制低频振荡[J].电力自动化设备,2019,39(03):45-50+57.

NI Binye, XIANG Wang, LU Xiaojun, et al. Low-frequency oscillation suppression using flexible DC grid based on state feedback supplementary damping control[J]. 2019, 39(3): 45-50+57.
[1]倪斌业,向往,鲁晓军,文劲宇.基于状态反馈附加阻尼控制的柔性直流电网抑制低频振荡[J].电力自动化设备,2019,39(03):45-50+57. DOI： 10.16081/j.issn.1006-6047.2019.03.007.

NI Binye, XIANG Wang, LU Xiaojun, et al. Low-frequency oscillation suppression using flexible DC grid based on state feedback supplementary damping control[J]. 2019, 39(3): 45-50+57. DOI： 10.16081/j.issn.1006-6047.2019.03.007.

摘要

为了提升交直流互联系统的动态稳定性

研究了利用多端柔性直流输电系统阻尼交流系统低频振荡的方法。分析了柔性直流电网接入后系统的振荡模态

研究了直流电网对交流系统稳定性的影响

并基于全维状态空间反馈设计了柔性直流系统的附加阻尼控制器。系统振荡时该附加阻尼控制器能够输出附加控制量

调节各换流站的有功功率

从而抑制系统的振荡。以含有四端柔性直流电网的新英格兰10机系统为例进行了仿真研究

仿真结果表明

引入了该控制器的柔性直流电网能够很好地抑制原系统的低频振荡

改善系统的动态性能。

Abstract

To improve the dynamic stability of AC/DC interconnected system

an approach that uses VSC-MTDC（Voltage Source Converter based Multi-Terminal Direct Current） to damp low-frequency oscillations is proposed.The oscillation mode of AC/DC system is analyzed

and the influences of DC grids on the stability of AC grids are studied. Based on the modal analysis

supplementary damping controller of VSC-MTDC is designed. This controller can output supplementary control signals and regulate the active power of each converter during oscillation to suppress the system oscillation. Simulations are carried on New England 10-machine power system with four-terminal DC grid. Test results indicate that the proposed controller damps the low-frequency oscillation and improves the system dynamic performance.

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