摘要
针对交直流系统暂态功角稳定问题,基于自抗扰控制理论研究,提出了电压源型换流器的柔性直流输电技术(voltage source converter based high voltage direct current,VSC-HVDC)有功调制控制策略。根据VSCHVDC对同步机组的可控能力筛选机组并确定聚合权重,将同步机群聚合转化为等效可控系统,利用线性自抗扰控制理论设计暂态稳定控制器;同时对同步机组的转速差和不平衡功率进行调制,从而充分发挥稳定控制器调节能力并维持交直流系统稳定。结果表明,控制器无需同步机组和直流输电系统的详细模型信息,且能适应系统运行方式的变化,并通过改进的IEEE39节点系统仿真验证了所提控制器的有效性和鲁棒性。
Aiming at the problem of stability of the transient angle of AC/DC system, this paper proposes a kind of VSC- HVDC active power modulation control strategy based on linear active disturbance rejection control （LADRC） theory. Ac- cording to controllability of VSC-HVDC on synchronous generators, it screens generators and determines aggregation weights to transform synchronous generators into an equivalent controllable system, and uses LADRC theory to design the transient stability controller. It modulates rotating speed difference and unbalanced power of synchronous generators simul- taneously so as to fully make use of modulation ability of the stability controller and maintain stability of the AC/DC system. Corresponding results indicate the controller needs no detailed model information of synchronous generators and the DC transmission system and could adapt to change of system operation. On the basis of simulation on the modified IEEE 39 sys- tem, it has verified effectiveness and robustness of the controller.
作者
管霖
陈肖灿
沈鹏
黄振琳
GUAN Lin;CHEN Xiaocan;SHEN Peng;HUANG Zhenlin(School of Electric Power,South China University of Technology,Guangzhou,Guangdong 510640,China)
出处
《广东电力》
2018年第10期1-9,共9页
Guangdong Electric Power
基金
国家自然科学基金项目(51577071)
关键词
交直流系统
暂态稳定性
VSC—HVDC
线性自抗扰
等效可控系统
AC/DC system
transient stability
VSC-HVDC
linear active disturbance rejection control （LADRC）
equivalent controllable system
