一种基于CPS的多源配电网故障定位与隔离方案

摘要

自愈是智能电网的主要特征，故障定位和隔离是实现自愈的基础。分布式电源接入使配电网的结构、潮流和故障电流都发生了很大的变化，故障定位和隔离问题变的更加复杂。基于信息物理融合系统通讯、计算和控制高度融合的理念，提出了一种多源配电网故障定位与隔离的CPS方案。方案以集传感、计算、通信、控制和开关功能能为一体的CPS单元为基本组成，借助CPS单元间的通讯获得必要的信息，经CPS单元的分布计算快速判断故障位置，发出控制指令切除和隔离故障。与传统电流保护相比，有自适应能力强、动作速度快的特点。%Self-healing is one of the main features of the smart grid, fault location and isolation are the basis of implementing it. In the distribution network with distributed generation (DG), network structure and fault current are greatly changed. The problem of fault location and isolation become more complicated. Based on the Cyber-Physical System(CPS) concept and its characteristics of close integration of computational and physical elements, ascheme for multi-source distribution network fault location and isolation is proposed. Each switch is integrated a CPS unit which is consist of sensing, computing, communication and control functions . It obtains necessary information through the communication among the CPS units, fault location in real-time through each CPS unit distribution calculation is judged quickly, it sends instruction signals and isolates faults. Compared with the traditional current protection, the protection scheme has the characteristics of stronger adaptive ability and quicker response.