摘要
为了解决主动配电网双向潮流对电缆型配电网保护影响,分析了DER接入电缆型配电网对保护带来的问题,提出了适用于主动配电网的差动保护方案。差动保护方案配置集中式线路差动与就地式母线差动保护,适用于电缆线路的配电自动化。DTU采用内置以太网通信技术,采用专用光纤通道"手拉手"连接。基于光纤通道实现DTU数据同步,DTU进出电流传输至集中式差动保护装置,由集中式差动保护装置实现配电网线路保护,DTU就地实现环网柜母线保护,能很好地满足电缆线路ADN接入DG对保护的要求。设计开发了相应的DTU及集中式差动保护装置,应用在实际的电缆线路ADN系统,具有很好的应用前景。
To solve the cable line distribution network protection impact of active distribution network bi-directional current, this paper analyzes the protection problem of the DER access and puts forward the scheme adapt to active distribution network differential protection. The scheme disposes centralized line differential protection and decentralized bus differential protection locally, which is suitable for cable line distribution automation. DTU adopts built-in Ethernet port technology, uses dedicated fiber channel hand in hand to connect. Based on fiber channel to realize synchronous sampling, DTU transfers current-in line and current-out line to centralized differential protection device, centralized differential protection device realizes distribution network line protection, DTU realizes ring main unit bus protection, which can well solve those problems of DG access. Corresponding DTU and centralized protection device are designed and used in the practical cable line ADN system, which has good application prospect.
出处
《电力系统保护与控制》
EI
CSCD
北大核心
2015年第12期104-109,共6页
Power System Protection and Control
关键词
主动配电网
分布式发电
配电自动化
集中式线路差动
就地式母线差动
active distribution network
distributed generator
distribution automation
centralized line differential
decentralized bus differential
