Application; General Ied Application; Section 2 Application - ABB RELION 670 Series Applications Manual

1MRK 511 364-UUS A
Section 2
2.1

General IED application

RES670 is a Phasor Measurement Unit (PMU) that provides power system AC voltages and
currents as phasors for all voltage levels in power system networks. Phasors are provided as real
and imaginary or as magnitude and phase angle. The reference for the phase angle is the NavStar
Global Positioning System – GPS that also supplies highly accurate time and date. The measured
data in each PMU is time-synchronized via Global Positioning System (GPS) receivers – with an
accuracy of one microsecond – and transmitted to Phasor Data Concentrators (every 100
milliseconds for example). The accurate time tagging of measurements taken at different
geographical locations makes it possible to derive the synchronized phasor quantities
(synchrophasors). Based on synchrophasors, a number of power system applications are available.
The PMUs are installed at substation level, and can be connected directly to current and voltage
transformers within the substations. Each RES670 can have its own antenna and GPS system for
time synchronization purposes or it can receive the IRIG-B signal from an external GPS-based
clock. It is also possible to have both direct GPS and IRIG-B connection to provide time
synchronization redundancy for the PMU. RES670 streams out its synchrophasor data according
to IEEE C37.118 and/or IEEE 1344 standards for synchrophasor data streaming and with user-
selectable reporting rates. RES670 supports reporting rates of 10, 25, 50, 100, and 200 frames per
second for 50Hz system (or 10, 12, 15, 30, 60, 120, and 240 frames per second for 60Hz system).
Each RES670 can communicate its synchrophasor data to up to eight independent clients over TCP
and/or six independent UDP channels (unicast/multicast), simultaneously. More information is
available in RES670 Application Manual under
In addition to the synchrophasor communication standard (IEEE 1344, IEEE C37.118), RES670 is
also compliant to IEC 61850-8-1 standard for integration to substation automation systems and
exchange of GOOSE messages, when necessary. RES670 is able to communicate over IEC 62439-3
PRP for redundant station bus communication for both IEEE C37.118 and IEC 61850-8-1,
simultaneously.
Figure 2
PMUs are the building blocks for a WAMS. The architecture of a WAMS consists of the following
main components:
• 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
Application manual

Application

shows an example of a system architecture for a Wide Area Monitoring System (WAMS).
Wide Area Measurement System
Section 2
Application
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