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A Single Back-to-Back Converter Based System Emulator for Testing Unbalanced Microgrids
IEEE Transactions on Energy Conversion ( IF 4.9 ) Pub Date : 2020-07-01 , DOI: 10.1109/tec.2020.3006385
A. S. Vijay , Suryanarayana Doolla , Mukul. C. Chandorkar

Renewable energy sources are typically interfaced to the main grid at the distribution level, through power electronic converter interfaces. Testing these microgrid systems is a crucial aspect which is gaining increased interest and importance among researchers. This article proposes a system emulator , for testing microgrids, with a special focus on replicating unbalanced network conditions . The proposed system uses a single back-to-back bidirectional converter for real-time emulation, and the user has the option to chose any node of their interest to study the dynamics. This is different from the ones proposed to-date - most of them focus on balanced systems, and use several converters to replicate the dynamics of the microgrid system, in which each converter mimics one entity at a time (source or load). A system with two generators is emulated for different control strategies and types of unbalances in the network. The crucial aspects related to the modelling and control are presented in detail supported by simulations and experimental validation on a prototype developed.

中文翻译:

基于单个背靠背转换器的系统仿真器,用于测试不平衡微电网

可再生能源通常通过电力电子转换器接口在配电级连接到主电网。测试这些微电网系统是至关重要的方面,正在引起研究人员越来越大的兴趣和重要性。本文提出了一个系统仿真器 ,用于测试微电网,特别侧重于复制 网络条件不平衡 。建议的系统使用单个背对背双向转换器进行实时仿真,用户可以选择自己感兴趣的任何节点来研究动力学。这与迄今提出的方案不同-它们大多数集中在平衡系统上,并使用多个转换器来复制微电网系统的动态,其中每个转换器一次模拟一个实体(源或负载)。针对具有不同控制策略和网络中不平衡类型的系统,模拟了具有两个发电机的系统。详细介绍了与建模和控制有关的关键方面,并通过对所开发原型的仿真和实验验证来支持。
更新日期:2020-07-01
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