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首页> 外文期刊>Emerging and Selected Topics in Power Electronics, IEEE Journal of >Voltage Stability Analysis and Sliding-Mode Control Method for Rectifier in DC Systems With Constant Power Loads
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Voltage Stability Analysis and Sliding-Mode Control Method for Rectifier in DC Systems With Constant Power Loads

机译:恒功率负载直流系统整流器的电压稳定性分析和滑模控制方法

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摘要

Voltage stability draws more and more attentions in dc systems due to the high penetration of constant power loads. This paper gives comprehensive analysis for the voltage stability and proposes a sliding-mode control method to enhance the voltage stability margin of dc systems. First, by the impedance-based stability analysis approach, the voltage stability of the three-phase rectifier serving as the source converter is examined when interacted with tightly regulated load converter. The dynamic input characteristics of the load side converter are investigated to find the relationship between the negative incremental impedance and the output power of the load converter. Second, a new sliding-mode control method is proposed to achieve the large-signal stability. Lyapunov function is used to ensure the stability of the proposed controller. Finally, the effectiveness of the proposed control method is verified by simulation results.
机译:由于恒定功率负载的高穿透性,电压稳定性在直流系统中越来越受到关注。本文对电压稳定性进行了综合分析,并提出了一种滑模控制方法来提高直流系统的电压稳定性裕度。首先,通过基于阻抗的稳定性分析方法,当与严格调节的负载转换器相互作用时,将检验用作源转换器的三相整流器的电压稳定性。研究了负载侧转换器的动态输入特性,以找到负增量阻抗与负载转换器输出功率之间的关系。其次,提出了一种新的滑模控制方法来实现大信号的稳定性。 Lyapunov函数用于确保所提出控制器的稳定性。最后,仿真结果验证了该控制方法的有效性。

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