Built upon decades of research, development, and leveraging numerous operational experiences in secondary
power systems, NR Electric has developed a unifed and integrative solution for the secondary system; from the
station level to the grid level, including communication infrastructure.
At a station level, the Protection, Automation & Control (PAC) solution integrates protection, control, monitoring,
metering, recording, video surveillance (CCTV) and communication in each substation. At a network level, it
provides the following:
• Energy Management System (EMS)
• Distributed Management System (DMS)
• Tele-Meter Reading System (TMR)
• Power Stability Control System (PSCS)
• Wide Area Measurement System (WAMS)
• Disturbance & Fault Management System (DFMS)
• Relay Management System
• CCTV Management System.
Furthermore, the communication infrastructure between substations and dispatching centers are compatible
with our system. The Local Area Network (LAN) is used for the internal communication between substations
and dispatching centers. The Wide Area Network (WAN) and/or Synchronous Optical Networking (SONET)/
Synchronous Digital Hierarchy (SDH) networks can be adopted for the inter-station communications according
to the specifc application requirements.
With the PAC solution, the utilities operators can unify the management system of dispatching centers and
substations. Based on the IEC 61850 and the IEC 61970 standards, and other communication protocols, data
is classifed and can be shared by several applications within the ISS system. The unifed data format allows for
easy extension of new applications. The cyber security is acquired via the authorization and hardware security
devices.