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Discrete-Time Modeling, Stability Analysis, and Active Stabilization of DC Distribution Systems With Multiple Constant Power Loads

机译:具有多个恒定功率负载的直流配电系统的离散时间建模,稳定性分析和主动稳定

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摘要

This paper presents the stability analysis of dc distributed power systems with multiple converter-controlled loads. The load converters are tightly controlled, behaving as constant power loads with low-damped LC filters. The dynamic behavior of the system in high frequency range is often not studied with the classical tools based on conventional averaging techniques. However, dc power systems with the reduced size filter, and consequently, the high resonant frequency, are widely used in transportation applications. In this paper, the stability analysis of the system is established based on a discrete-time model of the system, taking into account the switching frequency and intrinsic nonlinearities of the system model. The impacts of the filter parameters and interactions among the constant power loads are investigated with the proposed discrete-time method. Moreover, an active stabilizer is developed and included in the dynamic model of the system, in order to extend the stability margin. The theoretical observations are then validated experimentally on a laboratory hardware prototype.
机译:本文介绍了具有多个变频器控制负载的直流分布式电源系统的稳定性分析。负载转换器受到严格控制,具有低阻尼LC滤波器,表现为恒定功率负载。通常不使用基于常规平均技术的经典工具来研究系统在高频范围内的动态行为。然而,具有减小尺寸的滤波器并因此具有高谐振频率的直流电源系统被广泛用于交通运输应用中。本文基于系统的离散时间模型,考虑了系统模型的开关频率和固有非线性,建立了系统的稳定性分析。提出的离散时间方法研究了滤波器参数的影响以及恒定功率负载之间的相互作用。此外,开发了主动稳定器并将其包含在系统的动力学模型中,以扩展稳定性裕度。然后,在实验室硬件原型上对理论观察进行实验验证。

著录项

  • 来源
    《IEEE Transactions on Industry Applications》 |2016年第6期|4888-4898|共11页
  • 作者单位

    Department of Electric Power Engineering, Norwegian University of Science and Technology, Trondheim, Norway;

    Groupe de Recherche en Électrotechnique et Électronique de Nancy, Ecole Nationale Supérieure d'Electricité et de Mécanique, Université de Lorraine, Nancy, France;

    Groupe de Recherche en Électrotechnique et Électronique de Nancy, Ecole Nationale Supérieure d'Electricité et de Mécanique, Université de Lorraine, Nancy, France;

    Groupe de Recherche en Électrotechnique et Électronique de Nancy, Ecole Nationale Supérieure d'Electricité et de Mécanique, Université de Lorraine, Nancy, France;

    Groupe de Recherche en Électrotechnique et Électronique de Nancy, Ecole Nationale Supérieure d'Electricité et de Mécanique, Université de Lorraine, Nancy, France;

    Department of Engineering Cybernetics, Norwegian University of Science and Technology, Trondheim, Norway;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Power system stability; Stability analysis; Load modeling; Microgrids; Power system dynamics; Analytical models; Resonant frequency;

    机译:电力系统稳定性;稳定性分析;负荷建模;微电网;电力系统动力学;分析模型;谐振频率;
  • 入库时间 2022-08-18 01:24:26

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