Coordinated control of DC voltage magnitudes and state of charges in a cluster of DC microgrids

2016 IEEE PES Innovative Smart Grid Technologies Conference Europe (ISGT-Europe) Pub Date : 2016-10-01 DOI:10.1109/ISGTEurope.2016.7856272

M. Shahbazi, B. Kazemtabrizi, C. Dent

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引用次数: 11

Abstract

This paper presents a modified approach for the control of DC voltages and State of Charges (SOC) of batteries in an interconnected cluster of DC microgrids. First, the model of a DC microgrid is reviewed, and then the proposed control method is presented. This method is composed of two compensation terms that are introduced in the secondary control level in the hierarchical control framework of the microgrids. These compensation terms are used to control the voltage throughout the cluster, and also to equalize the SOCs over the cluster. Even though this method is proposed as a centralized controller, it is shown that it is possible to implement it in a decentralized manner, using a consensus algorithm to estimate the average state of charge locally. Moreover, a modification is proposed that gets the reference SOCs from the tertiary control level, and tries to control storage units based on these references. Simulations ae carried out and the results are provided. These results show the effectiveness of the proposed methods and modifications.

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直流微电网簇中直流电压大小和电荷状态的协调控制

本文提出了一种改进的直流微电网集群中电池直流电压和荷电状态控制方法。首先回顾了直流微电网的模型，然后给出了所提出的控制方法。该方法由两个补偿项组成，在微电网的分层控制框架中引入二级控制层。这些补偿项用于控制整个集群的电压，也用于均衡集群上的soc。尽管该方法是作为集中式控制器提出的，但研究表明，它可以以分散的方式实现，使用共识算法来估计局部平均充电状态。此外，还提出了一种从三级控制层获取参考soc的改进方法，并尝试基于这些参考来控制存储单元。并进行了仿真，给出了仿真结果。这些结果表明了所提出的方法和修正的有效性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2016 IEEE PES Innovative Smart Grid Technologies Conference Europe (ISGT-Europe)

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