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基于变量反馈的电力系统混沌振荡控制
张强,王宝华
作者单位
摘要:
混沌运动是一种普遍存在的现象,表现了系统内部的复杂性、随机性和无序性。电力系统也存在混沌现象,对系统的稳定运行是有害的。采用变量反馈控制法(VFC)控制互联电力系统由周期性负荷扰动引起的混沌振荡,根据混沌运动对初值敏感依赖性,仅采用单一状态变量反馈就能有效地抑制系统的混沌振荡,使系统从混沌或不稳定状态进入稳定的运动状态。该方法具有良好的稳定性和轨道跟踪能力,不改变被控系统的结构,不需要使用除系统输出或状态变量以外的任何有关被控系统的信息。在仿真分析时比较了反馈控制器投入前后的系统动态行为,得到的结果与理论分析相一致。
关键词:  变量反馈 电力系统 混沌振荡控制 稳定性 数学模型
DOI:
分类号:TM712
基金项目:
Chaos control with variable feedback in power system
ZHANG Qiang  WANG Bao hua
Abstract:
Chaos is a general phenomenon in the world and its internal structure is complicated, stochastic and irregular. There also exists chaos in a power system, which is hazardous to its stable operation. A control method with variable feedback (VFC) is presented for the control of chaotic oscillation induced by a periodical disturbance in an interconnected power system. Based on its sensitivity to and dependence on its initial value, the chaotic oscillation is effectively controlled by only using a single feedback state variable. Therefore, the system turns back from a chaotic or unstable state into a stable one. The presented method has good stability and the ability to trace the system orbit, and it does not need to change the controlled system structure and to use any information of the system except the system outputs or state variables. The dynamic behaviors of the system with and without VFC are compared in digital simulation, and the results are consistent to those in theoretic analysis.
Key words:  power system,chaos control,variable feedback,stability

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