Controller Design and Stability Analysis of Electric Spring with Switchable Smart Load

Yubin Duan, Yi Wei, Xiaohu Wang, Xinyuan Chen, Chaohui Zhao
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引用次数: 1

Abstract

Aiming at the characteristics of the traditional electric spring (ES) to stabilize the voltage of critical load (CL), electric spring with switchable smart load (SSL) is studied. The basic principle of ES with SSL is discussed, a control strategy is proposed to use one PR controller to control different loads respectively by using the indirect voltage control method. The controller parameters are deduced by the method of root locus, the stability of the controller is analyzed by using the method of state space modeling, and Matlab is used to compare and analyze the stability of the system when stabilizing different load voltages when the R/X ratio of line impedance is different. The results show that the switching of smart load (SL) and the voltage stabilization of different loads can be realized under the designed controller parameters.
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可切换智能负载电动弹簧控制器设计及稳定性分析
针对传统电弹簧稳定临界负载电压的特点,对可切换智能负载电弹簧进行了研究。讨论了带SSL的ES的基本原理,提出了一种采用间接电压控制法,用一个PR控制器分别控制不同负载的控制策略。采用根轨迹法推导了控制器参数,采用状态空间建模的方法分析了控制器的稳定性,并利用Matlab对比分析了在不同线阻抗R/X比下稳定不同负载电压时系统的稳定性。结果表明,在所设计的控制器参数下,可以实现智能负载的切换和不同负载的电压稳定。
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