电力系统混沌振荡现象的ACPD控制  

Auto-coupling PD Control of Chaotic Oscillations in Power Systems

作　　者：郭承宇 熊屹林 GUO Chengyu;XIONG Yilin(School of Electrical&Information Engineering,Changsha University of Science&Technology,Changsha 410076,China)

机构地区：[1]长沙理工大学电气与信息工程学院,湖南长沙410076

出　　处：《电工技术》2023年第5期5-9,共5页Electric Engineering

基　　金：国家自然科学基金项目(编号61040049);湖南省教育厅重点项目(编号21A0183);长沙理工大学研究生科研创新项目(编号CX2021SS46)。

摘　　要：针对非线性电力系统容易产生混沌振荡现象的问题,分析了四阶非线性、多状态变量耦合电力系统的混沌特性,并提出了一种基于自耦PD控制理论的混沌控制方法。该方法将四阶非线性电力系统中的第二通道内部动态变化、外部扰动和所有不确定因子都定义为一个总扰,由此可将原系统等效地映射成一个有干扰项的二次线性系统,以转子指定角度和实际角度之差为控制误差,继而建立了一种在反相总扰激励下的控制误差系统,并利用一个速度因子把传统比例-微分两种控制力耦合起来,从而建立了ACPD非线性闭环控制系统。为同时满足控制器的响应速度和稳态精度,提出了基于转子角度跟踪误差的自适应速度因子模型。仿真显示了使用ACPD控制器只需0.3 s的时间,就能使转子角度跟踪到期望轨迹,且抗扰能力强,在电力系统稳定性控制领域具有实际应用前景。Aiming at the problem that nonlinear power system is easy to produce chaotic oscillation,this paper analyzes the chaotic characteristics of fourth-order nonlinear and multi-state variable coupling power system.A chaos control method based on auto-coupling Proportional-Differential(ACPD)control theory is proposed.In this method,the internal dynamic change,external disturbance and all uncertainty factors of the second channel in the fourth-order nonlinear power system are defined as a total disturbance.Thus,the original system can be equivalently mapped into a quadratic linear system with disturbance term.Taking the difference between the specified angle and the actual angle of the rotor as the control error,a control error system under the excitation of the total disturbance of inverting is established.A speed factor is used to couple the traditional proportional-differential control force to establish an ACPD nonlinear closed-loop control system.In order to meet the response speed and steady-state accuracy of the controller at the same time,an adaptive speed factor model based on rotor angle tracking error is proposed.The simulation shows that the rotor angle can track the desired trajectory with only 0.3 s speed using the ACPD controller,and has strong immunity,which has practical application prospects in the field of power system stability control.

关 键 词：电力系统 混沌振荡 ACPD控制 非线性系统 自适应速度因子 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]