摘要
首先讨论了超导储能装置 ( SMES)建模问题 ,根据 SMES样机实验结果 ,构造了 SMES的二阶鲁棒模型 ;然后在单机无穷大系统中 ,得到了含 SMES的电力系统非线性鲁棒模型。进一步 ,基于反馈线性化方法将系统线性化 ,再利用线性 H∞ 理论求得 SMES的鲁棒控制规律。最后 ,用数字仿真检验控制规律的有效性。结果表明在各种工况下 ,SMES的非线性鲁棒控制器均可使系统在受到大干扰后迅速恢复正常运行 ,并显著提高系统的暂态稳定极限 ,从而提高系统的输电能力。
Recently the development of power electronics and superconducting technology made it possible that superconducting magnetic energy storage (SMES) took part in the power system as FACTS devices to enhance transient stability. In this paper, a second order robust model of SMES is established first according to the experimental results of SMES prototype. Then the nonlinear robust model of the single-machine infinite-bus power system including SMES is obtained. Furthermore, the paper presents a procedure to obtain the nonlinear robust control law of SMES based on feedback linearization theory. The simulation results illustrate that the nonlinear robust controller can restore the system after large disturbance rapidly and improve the transient stability limits of the system, thus increasing the capacity of transmitting power.
出处
《电力系统自动化》
EI
CSCD
北大核心
2001年第17期1-6,共6页
Automation of Electric Power Systems
基金
国家重点基础研究专项经费 (G19980 2 0 30 9)
国家自然科学基金 (5 98372 70 )
关键词
超导储能装置
反馈线性化
非线性鲁棒控制器
电力系统
暂态稳定性
Electric power transmission
Energy storage
Feedback
Nonlinear control systems
Robustness (control systems)
Transients
