Abstract The proliferation of DC microgrid is a commendable stride for the future power system to match the load requirement precisely with the distributed generation. The potential benefits of DC system over AC technology have made DC microgrid as a competent solution for anonymously increasing DC applications and load demands. However, the thriving advantages of emerging DC microgrid system are undermined due to the substantial challenges associated with its protection. Chronologically changing DC microgrid architectures decisively affects the existing protection schemes. Fault current nature and fault types further elevate this issue. Furthermore, due to the discharge of converter's DC link capacitor, the rapid rise of fault current in a short duration is a hindrance for the DC microgrid protection and thus decisively affects the safety layer for expensive loads and power converters. No zero crossing of DC fault current vehemently constrained the subroutine of DC circuit breakers. Conduction loss, operational speed requirement, fault current handling capability, and cost is the primary factors that inhibit the advancement of DCCB implementation. To address all those events regarding DC microgrid protection, this paper has explicitly reviewed the existing techniques along with the jurisdiction for the protection requirements towards the proclivity of future DC microgrid.

中文翻译：

---

直流微电网保护技术——综述

摘要 直流微电网的普及是未来电力系统精确匹配负荷需求与分布式发电的一个值得称赞的进步。直流系统相对于交流技术的潜在优势使直流微电网成为匿名增加直流应用和负载需求的有效解决方案。然而，由于与其保护相关的重大挑战，新兴直流微电网系统的蓬勃发展优势受到削弱。按时间顺序变化的直流微电网架构决定性地影响现有的保护方案。故障电流性质和故障类型进一步提升了这个问题。此外，由于转换器的直流母线电容器放电，短时间内故障电流的快速上升是直流微电网保护的障碍，从而决定性地影响昂贵负载和功率转换器的安全层。直流故障电流无过零强烈制约了直流断路器的子程序。传导损耗、运行速度要求、故障电流处理能力和成本是阻碍 DCCB 实施进展的主要因素。为了解决有关直流微电网保护的所有这些事件，本文明确审查了现有技术以及对未来直流微电网倾向的保护要求的管辖权。运行速度要求、故障电流处理能力和成本是阻碍 DCCB 实施进展的主要因素。为了解决有关直流微电网保护的所有这些事件，本文明确审查了现有技术以及对未来直流微电网倾向的保护要求的管辖权。运行速度要求、故障电流处理能力和成本是阻碍 DCCB 实施进展的主要因素。为了解决有关直流微电网保护的所有这些事件，本文明确审查了现有技术以及对未来直流微电网倾向的保护要求的管辖权。