High Speed Transient / Power Quality Recorders

Tender description

EirGrid wishes to procure a supplier of Power Quality/Transient Fault Recorders to be used on the 400 kV, 275 kV, 220 kV and 110 kV Transmission network on the island of Ireland. The recorders shall be installed in transmission stations and their primary functions will be: Fault/Event recording in response to under, over and rate-of-change of voltage, current, frequency and active power in addition to remote manual and binary input triggers; Power Quality measurements, including flicker, unbalance and harmonics measurements up to and including the 50th harmonic; and Data streaming on a continuous basis for Phasor Monitoring Units (PMU) application. The recorders shall be capable of receiving GPS time-stamped voltage and current inputs derived from either protection or metering class instrument transformer cores and shall monitor the circuit passively. The recorder, in addition to current and voltage measurements, should provide the following: Three-phase Active and Reactive Power measurements using the appropriate voltage and current channels for calculation; Fundamental frequency of voltage measurement. It is desirable that the frequency be calculated using a phase-to-phase voltage; and Positive, negative and zero phase sequence voltages and currents.