PMU (ENIP-2)

ENIP-2 phasor measurement unit (PMU) integrates to automated control systems of substations and power plants as a part of Wide Area Measurement Systems (WAMS) used for power grid monitoring, as well as detection and prevention of instabilities in power grid networks. 

ENIP-2 PMU measures first harmonic of voltage and current at a high rate assigning a precise timestamp to each measurement, known as synchrophasor. Time synchronization, which is critical for PMUs, is provided by the global positioning systems.

ENIP-2 PMU uses a built-in GPS receiver, or is synchronized by an external ENCS-2 module. 

ENIP-2 PMU is designed to comply with both IEEE C37.118.1 classes P (Protection) and M (Measurement). The original signal processing algorithms rule out the influence of electromagnetic transients and higher harmonics on accuracy of measurements. 

ENIP-2 PMU can be panel-mounted or mounted in cabinets. Typically, it is mounted in special cabinets, along with other components of WAMS.

Measurements 

  • voltages RMS (phase, phase-to-phase and average);
  • currents RMS (phase  and average);
  • power (active, reactive and apparent: per phase and total);
  • frequency;
  • power factor (per phase and apparent);
  • active and reactive energy in direct and reverse directions.

ENIP-2 uses 50 ms sliding window measurement calculation method. The values are updated every 20 ms.

Phasor measurement 

Archives and emergency events recording