摘要
提出了基于多新息随机梯度模型辨识算法的电力系统广域自适应阻尼控制器设计思想。通过对实测输入输出信号进行在线辨识获得了含有互联电力系统全部关键机电振荡模式的精确开环模型;基于自由权矩阵方法研究了广域电力系统时滞相关稳定性条件,基于相关定理设计了状态反馈控制器,利用线性矩阵不等式可以方便求解得到时滞电力系统最大时滞上限。在此基础上,结合状态观测理论实现了互联电力系统的时滞输出反馈控制。针对典型的IEEE四机两区域互联电力系统的时域仿真表明,多新息随机梯度算法可以快速、准确的获得电力系统的开环模型,基于辨识所设计的广域自适应阻尼控制器能够显著地抑制系统低频振荡,提高互联电力系统阻尼和动态稳定性。
The paper proposed a idea for designing of wide-area adaptive damping controller based on muti-innovation stochastic gradient model identification. Online identification based on the measured input and output signals can obtained all the major electromechanical oscillation modes of the accurate open loop model of interconnected power system. Delay-dependent stability conditions of wide-area power system is studied based on free-weighting matrix approach, a state feedback controller is designed according to the stability condition of time-delay power system and maximum delay of time-delay power system is obtained in terms of linear matrix inequalities. On the basis, combined with the theory of state observation, time-delay interconnected power systems output feedback controller was obtained. Time domain simulation on the typical four -machine and two-area interconnected system shows that the dynamic stability and damping of interconnected power system are effectively improved by the designed wide-area time-delay controller based on identification.
作者
张子泳
钱峰
黄国栋
罗钢
刘俊磊
伍双喜
娄源媛
ZHANG Ziyong;QIAN Feng;HUANG Guodong;LUO Gang;LIU Junlei;WU Shuanxi;LOU Yuanyuan(Guangdong Power Dispatch and Control Center, Guangzhou 510000, China)
出处
《云南电力技术》
2017年第6期14-19,共6页
Yunnan Electric Power
基金
广东电网公司科技项目(项目编号:GDKJXM20162591)
