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Developing a stability assessment method for power electronics-based microgrids.

机译：开发基于电力电子的微电网的稳定性评估方法。

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摘要

Modern microgrids with microsources and energy storage are dependent on power electronics for control and regulation. Under certain circumstances power electronics can be destabilizing to the system due to an effect called negative incremental impedance. A careful review of the theory and literature on the subject is presented. This includes stability criteria for both AC and DC systems, as well as a discussion on the limitations posed by the analysis. A method to integrate stability assessment with higher-level microgrid architectural design is proposed. Crucial to this is impedance characterization of individual components, which was accomplished through simulation. DC and AC impedance measurement blocks were created in Matlab simulink to automate the process. A detailed switching-level model of a DC microgrid was implemented in simulink, including wind turbine microsource, battery storage, and three phase inverter. Maximum power point tracking (MPPT) was included to maximize the efficiency of the turbine and was implemented through three rectifier alternatives and control schemes. The stability characteristics of each was compared in the final analysis. Impedance data was collected individually from the components and used to assess stability in the system as a whole. The results included the assessment of stability, margin, and unstable operating points to demonstrate the feasibility of the proposed approach.
机译：具有微资源和能量存储的现代微电网依赖于电力电子设备进行控制和调节。在某些情况下，由于称为负增量阻抗的影响，电力电子设备可能会使系统不稳定。提出了对该主题的理论和文献的仔细审查。这包括交流和直流系统的稳定性标准，以及对分析所带来限制的讨论。提出了一种将稳定性评估与高层微电网建筑设计相结合的方法。至关重要的是单个组件的阻抗特性，这是通过仿真完成的。在Matlab simulink中创建了直流和交流阻抗测量模块，以使过程自动化。在Simulink中实现了直流微电网的详细开关级模型，包括风力涡轮机微源，电池存储和三相逆变器。最大功率点跟踪（MPPT）包括在内，以最大程度地提高涡轮效率，并通过三种整流器替代方案和控制方案来实现。在最终分析中比较了每种的稳定性特征。从组件中分别收集阻抗数据，并将其用于评估整个系统的稳定性。结果包括对稳定性，裕度和不稳定工作点的评估，以证明所提出方法的可行性。

著录项

  • 作者

    Austin, Peter M.;

  • 作者单位

    The Pennsylvania State University.;

  • 授予单位 The Pennsylvania State University.;
  • 学科 Electrical engineering.;Mechanical engineering.;Energy.
  • 学位 Ph.D.
  • 年度 2015
  • 页码 164 p.
  • 总页数 164
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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