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Islanding Detection in DC Network

机译：DC网络中的孤岛检测

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摘要

Nowadays, Energy is facing some serious problems, such as environmental pollution, the lack of energy when the traditional energies are going exhausted. Therefore, Renewable energies (the wind, solar, ocean wave, fuel cell-some of them are natively DC) become significant popular in power system. Besides, the development of fullness DC as storage technologies (batteries and ultra-capacitors), and DC loads (Data centers, electronic-based office, home appliances, plug-in electric vehicles, variable speed drives and DC electric arc furnaces) are significantly increased. Furthermore, DC grid leads to advantages than AC grid such as reduced losses, safety, abatement of electromagnetic fields, and power quality improvement. Similar to AC grid, islanding phenomenon is one of the most important problems in DC grid. This problem occurs when the main utility grid disconnected from the part of the grid include distributed energy resources (DERs), while DERs continue to supply the load. According to the IEEE standard 929-2000, this network must detect the condition issue and disconnected within 2s at maximum. Different from AC grid, the only voltage signal can be used to detect this issue in DC grid. There was much research about Islanding Detection Method (IDM) in AC network. But there was a little research about IDM in DC network. Therefore, this paper will investigate IDMs, advantages, and disadvantages IDMs in AC and DC network. Besides, the IDM in will be discussed in more details.
机译：如今，能源面临着一些严重问题，例如环境污染，传统能源枯竭时能源短缺。因此，可再生能源（风，太阳能，海浪，燃料电池等其中一些本身就是直流电）在电力系统中变得非常流行。此外，充填性直流电作为存储技术（电池和超级电容器）和直流电负载（数据中心，基于电子的办公室，家用电器，插电式电动汽车，变速驱动器和直流电弧炉）的发展也非常重要。增加。此外，与交流电网相比，直流电网具有许多优点，例如，损耗减少，安全性高，电磁场减少和电能质量提高。与交流电网类似，孤岛现象是直流电网中最重要的问题之一。当主公用电网与电网部分断开连接时，当分布式能源继续提供负载时，就会出现此问题。根据IEEE标准929-2000，此网络必须检测到状况问题，并且最多在2秒内断开连接。与交流电网不同，唯一的电压信号可用于检测直流电网中的此问题。 AC网络中的孤岛检测方法（IDM）已有很多研究。但是，关于DC网络中IDM的研究很少。因此，本文将研究IDM在AC和DC网络中的优缺点。此外，将更详细地讨论IDM。

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