摘要
针对电力系统实际负荷以及直流系统本身的非线性特性,在微分代数模型的基础上,将M导数、M括号以及MIMO微分代数系统反馈线性化技术运用到交直流并联系统非线性控制器设计中。在系统的M关系度小于系统阶数及其满足一定的条件时,可得到微分代数系统模型的Bronovsky标准形式,并对交直流混合(AC/DC)系统中发电机励磁控制和直流系统整流侧定电流控制律进行了深入研究。针对一个含有AC/DC的单机无穷大系统(SMIBs)进行实例仿真,研究结果表明所设计的非线性控制器与传统的PID控制器相比具有较好的阻尼特性,能进一步提高系统的动态稳定性。该控制器的设计方法可以很方便地应用于多机交直流并联系统的稳定性控制。
The M derivative 、 M bracket and MIMO feedback linearization based on differential algebraic models are introduced to the design of nonlinear controller for parallel AC/DC power system in view of the nonlinearity of power loads and HVDC in real power systems. Bronovsky standard form is derived when M relative degree of the system is less than the system dimension and certain designated conditions are satisfied. Then the excitation control law and rectifier current control law for AC/DC system are studied in depth. The simulation results for a single-machine infinite bus system (SMIBs) with parallel AC/DC transmission lines show that the nonlinear controllers have ulterior better ability to damp the oscillation and to improve the dynamic stability of the studied system in comparison with the conventional PID controller.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2005年第7期52-57,103,共7页
Proceedings of the CSEE
基金
国家自然科学基金项目(50307007)
国家重点基础研究发展规划项目(G1998020300)~~
关键词
电力系统
稳定性
AC/DC系统
非线性控制器
微分代数模型
设计
模糊控制
Power system
Parallel AC/DC power system
Differential algebraic models
Nonlinear dynamic Load
Feedback linearization
Bronovsky standard form
