Real-time integrated model of a micro-grid with distributed clean energy generators and their power electronics
Real-time integrated model of a micro-grid with distributed clean energy generators and their power electronics
复制标题
分布式清洁能源发电机及其电力电子微电网的实时集成模型
DOI：
10.1109/apec.2016.7468240
复制
发表时间：
2016
期刊：
影响因子：
--
通讯作者：
Shalabh Gupta
中科院分区：
文献类型：
--
作者：
Weiqiang Chen;A. Bazzi;J. Hare;Shalabh Gupta
本文提出了一个微电网的实时集成模型来模拟其电能基础设施。该基础设施包括两个光伏阵列、一个燃料电池和一台柴油发电机，在脱离公用电网时支持建筑负载。本文回顾了现有模型，这些模型通常可用作 1) 低级动态模型，以及特定组件的电力电子器件，例如光伏系统或燃料电池，或 2) 高级别，例如传统电力系统，其中电力电子设备由于其更快的动态而被忽略。所提出的可持续发电建模策略强调并网和孤岛模式，并结合慢速和快速动态，对微电网和相关电力电子动态进行模拟，以展示如何在动态微电网环境中使用高保真模型。提出了一种用于孤岛模式的同步调节器。假设光伏阵列和燃料电池始终可用且可变辐照条件（例如夜间）以及燃料电池的氢和氧密度的变化在本文中显示。柴油发电机用于黑启动或当公用电网电压或频率降至阈值以下时，可能会发生潜在的电网崩溃，微电网进入孤岛模式。微电网模型使用实时模拟器进行模拟，以便可以在不忽略快速动态的情况下研究更长的案例研究和场景。本文的主要贡献是将这两个时间尺度（慢速和快速）集成到这个实时仿真平台中，以进行更真实的性能分析。结果显示了集成微电网仿真在并网和孤岛模式下运行的能力。
This paper presents a real-time integrated model of a micro-grid to simulate its electrical energy infrastructure. This infrastructure includes two PV arrays, a fuel cell, and a diesel generator that support building loads when islanded from the utility grid. The paper reviews existing models, which are usually available either as 1) low-level dynamic models, along with power electronics for specific components, e.g. PV system or fuel cell, or 2) high-level such as with conventional power systems where power electronics are ignored due to their faster dynamics. The proposed modeling strategy for sustainable power generation is emphasized for both grid-connected and islanding modes and combines slow and fast dynamics where both a micro-grid and related power electronics dynamics are simulated to show how a high-fidelity model can be used in a dynamic micro-grid environment. A synchronized regulator for islanded mode is presented. The PV arrays and fuel cell are assumed to be always available and variable irradiance conditions (e.g. nighttime) and the change of hydrogen and oxygen densities of fuel cell are shown in the paper. The diesel generator is used for black start or when the utility grid voltage or frequency drop below a threshold during which potential grid collapse could occur and the micro-grid goes into the island mode. The micro-grid model is simulated using a real-time simulator so that longer case studies and scenarios can be studied without ignoring fast dynamics. The main contribution of this paper is that both these time scales (slow and fast) are integrated in this real-time simulation platform for more realistic performance analysis. The results show the ability of the integrated micro-grid simulation to function in both grid-tied and islanded modes.