ABB RES670 Applications Manual page 34

Section 2
Application
28
• PMU Phasor Measurement Unit, including all accessories for time
synchronization
• TCP/IP and/or UDP/IP communication network infra-structure
• PDC Phasor Data Concentrator, including wide area applications
Phasor Data Concentrator
Gateway to other Utilities
Router
PTP or
PTP or
GPS/IRIG-B
GPS/IRIG-B GPS/IRIG-B
PMU PMU
Substation 1
IEC140000114 V2 EN-US
Figure 2: Wide Area Monitoring System architecture — overview
A Wide Area Monitoring System collects, stores, transmits and provides ways to
analyze critical data from key points across the power networks and over large
geographical areas. The architecture of the WAMS can provide a scalable solution,
from small installations for data collection and basic visualization (PDC) to larger
systems with intelligent monitoring using wide area applications. The Wide Area
Monitoring applications are designed to detect abnormal system conditions and
evaluate large area disturbances in order to preserve system integrity and maintain
acceptable power system performance.
The WAMS is configured in a way to acquire synchrophasor data from several
PMUs. Based on the data collected in the PDCs, WAMS is able to present the state
of the grid to the power system operator, and to provide monitoring of the power
system based on real-time measurements and the results of on-line applications. In
addition, the data available from PDCs enables off-line analysis of the power
system for post-disturbance assessments. It is possible to communicate the PMU
measurements and the results of the advanced applications to SCADA/EMS
systems as a way to improve the supervision of the system, providing the operator
with a clear indication how likely the system is to collapse, thus giving the
possibility to react in time.
Forcing of binary inputs and outputs is a convenient way to test wiring in
substations as well as testing configuration logic in the IEDs. Basically it means
Visualization
(Applications)
PDC
TCP/IP communication network
PMU protocol IEEE C37.118
Router Router
PTP or PTP or
GPS/IRIG-B
PMU PMU
Substation 2 Substation 3
1MRK 511 407-UEN C
Interface to
SCADA / EMS
Data Storage and Event
Driven Archiving
Router
PTP or PTP or
GPS/IRIG-B GPS/IRIG-B
PMU PMU
Substation N
IEC140000114-2-en.vsd
Phasor measurement unit RES670 2.2 IEC
Application manual