含静止无功发生器的直驱风电并网系统稳定性分析及振荡抑制策略  

Stability analysis and oscillation suppression strategy of direct-drive wind power grid-connected system with static var generator

作　　者：张芳[1] 王赫[1] 李传栋 ZHANG Fang;WANG He;LI Chuandong(Key Laboratory of Smart Grid of Ministry of Education,Tianjin University,Tianjin 300072,China;Electric Power Research Institute of Fujian Provincial Power Co.,Ltd.,Fuzhou 350007,China)

机构地区：[1]天津大学智能电网教育部重点实验室,天津300072 [2]国网福建省电力有限公司电力科学研究院,福建福州350007

出　　处：《电力自动化设备》2024年第6期1-8,17,共9页Electric Power Automation Equipment

摘　　要：风电并网系统稳定性分析及振荡抑制策略大多集中于风电场本身,针对含静止无功发生器(SVG)的直驱风电并网系统研究较少。基于特征值灵敏度筛选出对含SVG的直驱风电并网系统稳定性较显著的控制通道,然后基于独立通道分析设计理论将并网系统由多输入多输出耦合系统等效拆分为多个单输入单输出控制通道,在定性分析并网系统稳定性的同时定量评估不同控制通道间的交互作用程度。为抑制控制通道间的交互作用,提出了基于H∞鲁棒控制的次同步振荡抑制策略。通过电磁暂态仿真,验证了基于独立通道分析设计理论分析并网系统稳定性的正确性以及基于H∞鲁棒控制的次同步振荡抑制策略的有效性。Most of the stability analysis and oscillation suppression strategies of wind power grid-connected system focus on wind farm itself,but less research is implemented for direct-drive wind power grid-connected system with static var generator(SVG).The control channels that have a significant impact on the stability of grid-connected system are screened out based on eigenvalue sensitivity.The grid-connected system is equivalently split into multiple single-input single-output(SISO)control channels from a multi-input multioutput(MIMO)coupled system based on the individual channel analysis and design(ICAD)theory.The stability of the grid-connected system stability is analyzed qualitatively while the interaction between different control channels is evaluated quantitatively.A sub-synchronous oscillation suppression strategy based on H∞robust control is proposed to suppress the interaction between control channels.Through electromagnetic transient simulation,the correctness of the grid-connected system stability analysis based on the ICAD theory and the effectiveness of the sub-synchronous oscillation suppression strategy based on H∞robust control are verified.

关 键 词：直驱风电机组 静止无功发生器 独立通道 H∞鲁棒控制 振荡抑制 

分 类 号：TM614[电气工程—电力系统及自动化]