一种改善电力系统暂态性能的轨迹跟踪控制策略  

A Method for Improving Power System Transient Performance Using Estimator Resetting Based on Tracking Models

作　　者：朱林[1] 徐敏[1] 陈裔生[2] 蔡泽祥[1] 倪以信[3] 

机构地区：[1]华南理工大学电力学院,广东省广州市510640 [2]广东电网公司佛山供电局,广东省佛山市528000 [3]香港大学电机电子工程学系

出　　处：《电力系统自动化》2012年第14期1-5,22,共6页Automation of Electric Power Systems

基　　金：国家自然科学基金资助项目(51147006);广东省自然科学基金资助项目(8451064101001540)~~

摘　　要：提出了一种新型轨迹跟踪控制策略,可有效改善受扰后系统的功角暂态性能并保证控制系统最终渐近稳定。该控制策略的核心思想是根据系统当前运行点与网络拓扑的信息,设计合适的参考轨迹并驱动系统沿着该轨迹运动,从而使得受扰动后的系统以较小摆幅快速收敛于一个合理的稳定运行点。建立了具备三角形结构形式的标准动力学模型,通过引入新的附加阻尼项和轨迹初始化条件,逆推设计实现了轨迹跟踪偏差量的消除和各相关因素间的解耦,并获得了控制规律。文中控制规律推导不依赖于具体的控制对象及建模详细程度,可在统一设计过程中实现控制器性能协调与参数的优化,在复杂的互联大系统下具有优势。在MATLAB环境下对4机2区域互联系统进行了大量仿真,相关仿真结果验证了该策略的有效性。A novel control law using estimator resetting based on tracking models is proposed. This controller can significantly improve transient performance of a power system after disturbances while maintaining the global asymptotic stability of the whole system. The main idea of the new control is to design a proper tracking trajectory and drive to a new stable equilibrium point with less amplitude and higher speed. Firstly, a triangle structure system model is derived based on global signals. Then, one supplement damping item and initial states of tracking models are considered, and the back-stepping method is introduced due to the structural features. Finally, the control theory, independent of objects and their models, is derived and enjoys overwhelming superiority in large scale grids. The simulation results in MATLAB show the validity of the proposed designing method.

关 键 词：轨迹跟踪 暂态性能 逆推法 

分 类 号：TM76[电气工程—电力系统及自动化]