分区域广域继电保护的系统结构与故障识别  

Study on System Architecture and Fault Identification of Zone-division Wide Area Protection

作　　者：李振兴[1] 尹项根[1] 张哲[1] 邓星[1] 王育学[1] 

机构地区：[1]强电磁工程与新技术国家重点实验室(华中科技大学),湖北省武汉市430074

出　　处：《中国电机工程学报》2011年第28期95-103,共9页Proceedings of the CSEE

基　　金：国家自然科学基金项目(50877031;50837002)~~

摘　　要：为促进广域继电保护(wide area protection,WAP)从原理性探索向工程可实现应用性转化,提出分区域广域继电保护的系统结构和故障识别算法,构建了较为明确的保护体系。基于有限广域保护的特点,提出将广域电网划分为类蜂窝结构的分区域系统实现继电保护,并结合集中式和分布式系统结构的优点,提出了更加适合区域电网的分布集中式广域继电保护系统结构。基于智能电子设备(intelligentelectronic device,IED)、子站处理单元(sub-station processing unit,SSPU)和区域集中决策中心(regional centralizeddecision center,RCDC)的3层系统结构通过相互通信实现保护区域的故障判断,同时,在通信系统中断时各层结构又具有独立决策的功能,提高了广域继电保护系统的可靠性。在建立系统层间互助机制的基础上,提出了区域距离保护,系统通过不同信息域的简单逻辑计算实现故障元件识别,可满足广域继电保护的选择性和快速性要求。用鄂东220 kV电网系统模型验证了广域保护系统的有效性。In order to propel the practical application of wide area protection （WAP）, a novel system architecture and a fault identification algorithm for zone-division WAP were proposed, then the hierarchy of WAP was established. Wide area network was decomposed to honeycomb-like structure that combined the advantages of the distributed and integrated structures. This partitioning method is more suitable for practical power grid structure. A three-layer system structure that contains intelligent electronic device （IED）, sub-station processing unit （SSPU） and regional centralized decision center （RCDC） was applied to identify faults through inter-layer communication. Meanwhile, independent decision-making function was employed to enhance the reliability of protection system when communication outages occurred. Zone-division distance relay was proposed based on mutual assistance mechanism, and fault element identification was realized by logical computation in each partitioned zones so as to meet the demand of selectivity and rapidity of WAP. Simulation tests based on eastern Hubei 220kV grid validated the effectiveness of the presented method.

关 键 词：电力系统 广域继电保护 有限性 分区域 系统 结构 系统分区 距离保护 

分 类 号：TM77[电气工程—电力系统及自动化]