柔性直流配网继电保护关键技术评述

随着泛在电力物联网概念的提出,传统的配网形态正发生显著变化,传统的交流配网设备众多、线损大、可靠性低,柔性直流配网(后简称“直流配电”)因其线损小、供电效率高、不存在三相不平衡等问题受到众多研究人员的青睐。文章主要论述了直流配网常见的故障形式和保护配置、故障电气量特征与保护原理、继电保护技术发展趋势。同时对直流配网继电保护技术的发展进行总结,指出下一步可能的发展方向。

Summary of Key Technology DC distribution flexible protection

To follow the trend of world energy revolution and the revolution of things, ubiquitous power of things, integrated energy system concept was first proposed, the ubiquitous power of Internet of things is the key energy construction. In this new age, the traditional form with a positive net change significantly, many conventional AC distribution network equipment, large line losses, low reliability, flexibility DC distribution network (referred to as the "DC distribution") because of line loss small, high-efficiency power supply, there is no phase imbalance and other issues favored by many researchers. This article reviews the common failure modes and protection configuration, fault protection principle electric characteristic and DC distribution network, relay protection technology trends. At the same time the development of direct distribution network relay technology are summarized and pointed out that the next step possible directions.