特高压输电线路分布式故障诊断系统研制及其关键技术

Key technologies and development of distributed fault diagnosis system for EHV transmission line

分布式线路故障诊断系统作为特高压输电线路故障位置定位服务的关键产品,对电力系统的安全、可靠与经济运行具有重要意义。结合实际系统的研制与应用,提出了一种基于分布式安装的线路监测终端、监测运维中心站和移动终端应用服务于一体的新型故障诊断服务系统。阐述了产品与系统的关键实现方案,并提出了基于监测终端的供能及其管理、高速采样及同步、时间同步及坐标定位、行波启动及识别处理技术,基于监测运维中心站的双机冗余和数据安全隔离、测距和故障识别、GIS信息与微气象服务技术以及移动终端App安全服务等自主关键技术。所述系统产品顺利通过国家权威检测机构组织的测试与认证并在西部特高压交流1 000 kV输电线路上挂网运行,取得了稳定可靠运行的实际效果。

Distributed line fault diagnosis system, as the key product application of EHV transmission line fault location service, is of great significance to the safety, reliability and economic operation of power system. This paper combines the development and application of practical system, and presents a novel diagnostic service system based on distributed installation of transmission line measuring terminals, online monitoring and maintenance system and mobile terminal application service. The key implementation schemes of products and systems are described in this paper. In addition, some key technologies such as energy harvest and management, high-speed sampling and synchronization, time synchronization and coordinate positioning, traveling wave start-up and identification processing based on transmission line measuring terminal, dual servers hot backup redundancy and data security isolation, ranging algorithm and analysis, GIS information and micro-meteorological service technology based on online monitoring and maintenance system, and application security service of mobile terminal are proposed. The system products described in this paper have successfully passed the test and certification organized by the China Electric Power Research Institute, and run steadily and reliably on the EHV AC1000 kV transmission line in the western of China.