基于数字化变电站的集中式保护

新型的PCS集中式保护采用嵌入式的硬件设计和分布式的软件设计。每个间隔的保护测控集成到一个DSP板卡中,并可灵活扩展,已经成功应用于220 kV变电站。变电站220 kV配置2台集中式线路保护装置完成所有线路和母联的保护测控功能,配置1台集中式元件保护装置完成母线、主变保护测控功能。66 kV配置4台集中式低压保护完成所有66 kV出线、电抗器、电容器保护。变电站在过程层采用IEC61850-9-2/GOOSE的冗余双网方案,间隔层采用点对点同步技术。

Integrated protection based on intelligent substation

The PCS integrated protection,which is successfully applied in a 220 kV substation,adopts the embedded hardware and distributed software.The protection,measurement and control functions of a bay are integrated in one DSP card and can be flexibly extended.At 220 kV level,two integrated line protections and one integrated unit protection are equipped for the protection of all lines,links,buses and transformers.At 66 kV level,four integrated low-voltage protections are equipped for the protection of all lines,reactors and capacitors.The redundant IEC61850-9-2/GOOSE-based dual-network is designed at process level while the special peer-to-peer synchronization technology is adopted for the differential protections at bay level.