中国电机工程学报2024，Vol.44Issue(5)：1688-1700,中插2,14.DOI:10.13334/j.0258-8013.pcsee.222069
分网接入方式下LCC-HVDC系统运动方程模型及交互振荡模式的阻尼特征(二):交互振荡模式研究
Motion Equation Model and Damping Characteristic of Interactive Oscillation Modes for LCC-HVDC System in Split-connection Mode(Part Ⅱ):Research on Interactive Oscillation Modes
摘要
Abstract
To investigate the interactive oscillation modes of line commutated converter based high voltage direct current(LCC-HVDC)system in split-connection mode and their damping characteristics,based on the system state space model and the motion equation model established in Part I,several weak-damping interactive oscillation modes featured by the strong coupling effects between electrical and control links at the inverter side are extracted.Also,the variation features of interactive oscillation modes under different short circuit ratio(SCR)conditions are studied.On this basis,the damping contribution from the self-stabilizing path of the rectifier/inverter-side and the en-stabilizing path of bipolar interaction to the dominant interactive oscillation modes are quantitatively evaluated by the complex torque coefficient method.The results show that,1)the damping ratios of the interactive oscillation modes will be redistributed under different SCR conditions.2)When the positive-pole SCR and negative-pole SCR at the inverter side are different significantly,the bipolar interaction is weak.The stability of the positive-pole and negative-pole system is dominated by the two interactive oscillation modes separately,and the stability characteristics are different.3)When the positive-pole SCR is close to negative-pole SCR at the inverter side,the dynamic interaction between the two poles is strengthened,in which case,interactive oscillation modes will dominate stability of the positive-pole system and negative-pole system simultaneously,presenting similar stability characteristics.关键词
电网换相换流器高压直流输电(LCC-HVDC)/分网接入/交互振荡模式/阻尼特征/双极交互作用Key words
line commutated converter based high voltage direct current(LCC-HVDC)/split-connection mode/interactive oscillation mode/damping characteristic/bipolar interaction分类
信息技术与安全科学引用本文复制引用
张加卿,郭春义,杨硕..分网接入方式下LCC-HVDC系统运动方程模型及交互振荡模式的阻尼特征(二):交互振荡模式研究[J].中国电机工程学报,2024,44(5):1688-1700,中插2,14.基金项目
国家自然科学基金项目(52277093). Project Supported by National Natural Science Foundation of China(52277093). （52277093）
