Wide Area Monitoring System (WAMS) consists of geographically dispersed Phasor Measurement Units (PMUs) delivering synchrophasors, i.e., time-tagged data samples of a power system’s voltage or current phasor using a standard time signal as the reference. The data in each PMU are time-synchronized via Global Positioning System (GPS) receivers – with an accuracy of one microsecond. The phasors measured simultaneously provide snapshots of the state of the monitored power system, enabling a number of synchrophasor applications to be available.
RES670 is a Phasor Measurement Unit (PMU) that provides power system AC voltages and currents as synchrophasors, providing real and imaginary parts or magnitude and phase angle. The communication capabilities of RES670 include IEEE C37.118 for WAMS solutions and IEC 61850 for easy integration in an existing substation automation system. Further, along with the phasor data measurement functionality, several protection and control functions of the Relion® 670 series IEDs are available in RES670.
The new RES670 version 2.0 release presents several improvements of the PMU functionality, compliance to international standards and communication capability. This new release also inherits all the benefits available with the new 670 series version 2.0, like support to IEC 61850 Ed.2, the local HMI including configurable three colour LEDs and programmable command buttons, cyber security features and improvement in the user experience for engineering efficiency and overall usability, among others.