智能配电系统多层级选择性保护技术

智能电网是整个电力行业未来的发展方向,作为其中的重要组成部分,保障智能配电系统供电的可靠性与持续性尤其受人关注。本文从建设坚强智能配电网的需求出发,总结了传统过电流保护技术的不足和包括应用在线监测以及对控制与保护等方面的技术要求,提出低压配电系统多层级选择性保护技术,并分析了多层级选择性保护系统的关键技术实现,展望该技术的应用趋势,为实现多层级全范围选择性保护提供一个新思路。

The Technology for Selective Coordination of Multilevel Protection in Intelligent Power Distribution System

Smart grid is the future development direction of the electric industry. The reliability and continuity of the power supply is particularly concerned by people. Multilevel protection in intelligent power distribution is critical. The conventional method for short circuit fault in low-voltage system is over-current protection. But it has disadvantages such as inadequate of speed and reliability and inadequate of the ability to coordinate at each level etc. In order to research the mechanism of the full range of selective coordination of multi-level protection and improve the existing lack of selective protection, based on the review of applied research of selective protection methods of short-circuit fault in recent years, the paper proposed the experimental system and control and test device technology solution of multi-level selective short-circuit fault protection, and provide an experimental basis for research of low-voltage multi-level selective coordination protection.