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Recloser-fuse coordination protection for distributed generation systems: Methodology and priorities for optimal disconnections

机译:分布式发电系统的重合闸熔断协调保护:最佳断开连接的方法和优先级

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This study investigates a recloser-fuse coordination protection methodology for distributed generation systems. The technique identifies critical margins for proper recloser-fuse coordination and monitors distribution line ratings in real-time. In case of violations, only distributed generators attributed to effectively increasing short-circuit level are disconnected from the grid by gate turn-off thyristors. Therefore, fault current is reduced to a satisfactory level, restoring the coordination between reclosers and fuses in radial distribution feeders. Besides, the methodology enables new distributed energy resources to be connected to the grid, even during fault occurrences, if main short-circuit contributors are disconnected and a fault threshold level is maintained. Priorities for optimal disconnections are presented and allow utilities to achieve greater supply security by adapting the proposed protection system to feeder's particularities. Finally, this paper reviews on-going activities that are being performed for the development of the proposed approach.
机译:这项研究调查了分布式发电系统的重合闸保险丝协调保护方法。该技术可识别临界余量,以实现正确的重合闸保险丝配合,并实时监控配电线路的额定值。在发生违规的情况下,只有归因于有效提高短路水平的分布式发电机才通过栅极关断晶闸管与电网断开连接。因此,故障电流降低到令人满意的水平,恢复了径向配电馈线中重合器与熔断器之间的协调性。此外,该方法可以使新的分布式能源连接到电网,即使在故障发生期间,只要主短路贡献者断开并保持故障阈值水平,也可以将其连接到电网。提出了最佳断开连接的优先顺序,使公用事业公司能够通过根据馈线的特殊情况调整建议的保护系统来实现更高的供应安全性。最后,本文回顾了为拟议方法的发展正在进行的活动。

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