摘要
超级电容储能系统(SCESS)主要通过对双向DC/DC变换器进行控制来快速平抑直流母线电压的波动。为了抑制控制过程中所产生的一些分岔和混沌现象,提出了一种应用于SCESS的混沌控制方法。分析了该方法的控制原理,并根据非线性动力学理论建立了双向DC/DC变换器的离散迭代模型;然后设计了一种能够自动调节补偿斜率的混沌控制信号;最后对该信号作用下的异步切换函数和同步切换映射式进行了数值求解,从而绘出系统分叉图。通过仿真和试验证明,该方法能够有效抑制SCESS的分岔和混沌现象,提高了系统的稳定工作范围和动态响应速度。
In super-capacitor energy storage system(SCESS),the DC bus voltage could be stabilized rapidly by controlling the bidirectional DC/DC converter.In order to suppress some bifurcation and chaos phenomena in the control process,a chaos control method for the SCESS application was proposed.The control principle of this method was analyzed.The discrete iteration model of bidirectional DC/DC converter was established by nonlinear dynamics theory.A chaos control signal which could automatically adjust the compensation slope was designed.The asynchronous switching function and synchronous switching mapping were solved numerically under the action of the chaos control signal,so that the bifurcation diagrams of the system could be drawn.Simulation and experiment showed that the bifurcation and chaos phenomena of SCESS could be effectively suppressed by the method.The stable working range and dynamic response speed of the system were improved.
作者
王擎宇
卢振坤
文国富
李燕
马伏花
WANG Qingyu;LU Zhenkun;WEN Guofu;LI Yan;MA Fuhua(School of Information Science and Engineering,Guangxi University for Nationalities,Nanning 530006,China)
出处
《电机与控制应用》
2019年第12期81-87,98,共8页
Electric machines & control application
基金
国家自然科学基金项目(61561008)
广西民族大学相思湖青年学者创新团队项目(2018RSCXSHQN03)
广西民族大学人才引进项目(2018KJQD18)
关键词
超级电容储能系统
双向DC/DC变换器
非线性动力学
混沌控制
super-capacitor energy storage system(SCESS)
bidirectional DC/DC converter
nonlinear dynamics
chaos control
