固定分区系统区
fixed partition system area
FPSA
3层式广域保护系统
Three-level Wide Area Protection System
磁层-电离层系统(MI系统)
Magmetosphere-Ionosphere(MI) system
操作系统保护区
OSP Operation System Protect area
广域保护系统
Wide area protection system
wide area relaying protection system
单相保护式分路开关
single-phase protective branch switch
电力系统分区
power system division
partitioning of power system
distribution network partitioning
network partitioning
电网分层分区
power system delamination and subarea
分层、分区
Voltage-grading and District-dividing
分层分区
layering partition
delaminating subarea
layering and zoning
laying and zoning
Dividing Layers and Dostricts
district dividing
hierarchical and regional principle
district and voltage level classification
leveling and zoning
operation by level and district
Voltage Grading and Network Partition
voltage-gradingdistrict-dividing
分层分区开挖
layered and blocked excavation