电力系统混沌振荡的双曲函数滑模控制

摘要

Chaos is a kind of motion that is not predictable or similar to the initial value of the system because of its sensitivity to initial value.The power system is a typical nonlinear system,in which chaotic oscillations will occur in the interaction of the parameters,and even will lose its stability.In order to suppress the chaos in power system,this paper proposes a sliding mode control method of hyperbolic tangent function based on a simply interconnected power system of chaotic oscillation,with the convergence accuracy of the controller proved theoretically.The simulation results show that the designed sliding mode controller can effectively restrain the chaotic oscillation of power system.%混沌是指确定性动力学系统因对初值敏感而表现出的不可预测的、类似随机性的运动.电力系统是一个典型的非线性系统,在各参数相互作用下将会发生混沌振荡,甚至因此失去稳定性.为了对电力系统中出现的混沌现象进行抑制,基于具有混沌振荡特性的简单互联电力系统,本文提出了双曲正切函数的滑模控制方法,设计了双曲正切函数滑模控制器,并从理论上分析和证明了该控制器的收敛精度,仿真结果表明,所设计的滑模控制器能够有效抑制电力系统的混沌振荡.