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Communication-based Adaptive Protection for Distribution Systems Penetrated with Distributed Generators

机译：分布式发电机渗透的配电系统基于通信的自适应保护

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In this article, a communication-based adaptive over-current protection scheme for distribution systems penetrated with distributed generators is proposed. A communication network between the over-current relays, the distributed generators, and the utility grid is employed to automatically update the settings of the protective relays. Moreover, the communication reliability is increased through the addition of a backup communication system. The proposed scheme has the advantage of operating during grid-connected and islanding modes of operation. The scheme employs two simultaneous algorithms. The first algorithm works when the system configuration is changed due to the connection/disconnection of a distributed generator or the utility grid. The second algorithm efficiently uses the exchanged information between the relays to identify the faulted section and hence speeds up fault clearance. The proposed scheme is tested for different fault conditions as well as for different system configurations. The results demonstrated that relay operating times, including the communication delay, are greatly reduced when the faulted section is identified and relay settings are adjusted accordingly. In addition, a negligible time delay was experienced when the backup communication network was put in service.
机译：在本文中，提出了一种基于通信的自适应分布式配电系统的过电流保护方案。过流继电器，分布式发电机和公用电网之间的通信网络用于自动更新保护继电器的设置。此外，通过增加备用通信系统可以提高通信可靠性。所提出的方案具有在并网和孤岛操作模式期间操作的优点。该方案采用两种同时算法。当由于分布式发电机或公用电网的连接/断开而改变系统配置时，第一种算法起作用。第二种算法有效地利用了继电器之间交换的信息来识别故障部分，从而加快了故障清除速度。针对不同的故障条件以及不同的系统配置对提出的方案进行了测试。结果表明，识别出故障部分并相应调整继电器设置后，继电器的运行时间（包括通信延迟）将大大减少。另外，当备用通信网络投入使用时，时间延迟可以忽略不计。

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