基于CORBA的混杂MAS广域后备保护系统设计

为避免系统瓦解,优化后备保护系统的性能,使保护和控制实时沟通,互相配合,提出了后备保护系统,它是将一个地区内不同电压等级,不同变电站的所有后备保护人工智能化,并通过光纤网组合成的一个基于CORBA的大型混杂MAS的分层分布式广域后备保护系统。该系统分为区域级、变电站级后备保护系统中心MAS以及元件Agent三级结构,利用MAS和CORBA技术实现系统的各部分的自治和各部分之间的交互活动。针对断路器失灵、过负荷、重合闸的情况通过调整后备保护系统的动作时间、动作方式以及向稳控装置发控制信号,实现保护与控制的相互配合。动模实验证明该系统及优化策略切实可行、易于实现。

Design of a Novel Wide-area Backup Protection System Based on CORBA and Hybrid MAS

The reason of the blackout of North America Grid occurring in 2003 lies in inconsistent operation of backup protection and load shedding devices. To enhance the security and stability of power system, one proposal is to optimize the performance of backup protection systems. Therefore, a novel wide-area backup protection system based on CORBA and hybrid MAS system is presented in this paper. The proposed system intelligentizes all the backup protection devices in one area, then integrates them into one system, and establishes the means to coordinate with stability control devices. The proposed system is arranged as three layers, as Area Backup Protection System Center MAS, Substation Backup Protection System Center MAS, and Power System Component Agent, connected together via fiber-optic communication links, these devices can process intelligent algorithms based on data collected locally. Furthermore, MAS and CORBA technique is utilized, to realize control and coordinate inside the system on time, also mobile agent is adopted to send or get data from other part of the system. The configuration and function of each agent is described. Service functions in CORBA make each part of the proposed system communicate each other. The strategies is also introduced, especially for breaker failure, overload and reclosure. With adjusting the proposed backup protection system's action time and action style, also with delivering signals to stability control devices, the backup protection system can coordinate with stability control devices. The protection system is illustrated with actual power system, to explain the proposed strategy, and the availability and superior performance of the proposed scheme is collaborated.