基于自适应非奇异终端滑模控制的电力系统混沌抑制

在一定条件下,电力系统会产生混沌振荡现象,影响电网的安全稳定运行。对电力系统四阶模型进行混沌振荡的动力学行为分析,并且设计了一种基于自适应非奇异终端滑模控制的控制器。在保证系统实现有限时间内收敛以及不产生奇异性问题的基础上,快速消除了四阶电力系统中的混沌振荡现象。针对四阶电力系统模型中阻尼系数和机械功率通常具有不确定性这一问题,采用自适应控制对其估计,增强了控制器的实用性。仿真结果证明了控制器的有效性。

Chaotic suppression of a power system based on adaptive non-singular terminal sliding mode control

Under certain conditions, chaotic oscillations will appear in a power system, affecting the safe and stable operation of the power grid. The dynamic behavior of chaotic oscillation in the fourth-order model of power system is analyzed and a controller based on adaptive non-singular terminal sliding mode control is designed. To ensure that the system converges within a limited time and does not produce singularity problems, the chaotic oscillation phenomenon in the fourth-order power system is quickly eliminated. To solve the problem that the damping coefficient and mechanical power usually have uncertainty in the fourth-order power system model, adaptive control is used to estimate it. This enhances the practicability of the controller. Simulation results demonstrate the effectiveness of the controller. This work is supported by the National Natural Science Foundation of China (No. 61803233).