Preen PAS/PFV Series
Regenerative Grid Simulator, PAS up to 2000kVA / PFV up to 400kVA
Testing solar inverters, EV chargers, and other grid-tie devices properly means testing how they behave when the grid itself misbehaves — voltage sags, surges, and the disturbances a real utility grid occasionally produces. A conventional AC source can supply power to a device under test, but only a four-quadrant regenerative source can also sink power back from it, reproducing the genuine two-way power flow that grid-tie equipment actually experiences in service.
Preen's PAS/PFV series delivers exactly that: sourcing power to a test article and sinking it back to the grid at over 90% efficiency, rather than dissipating returned energy as waste heat the way a non-regenerative load would. PAS models scale up to 2000kVA for large-scale grid-tie and utility-adjacent testing, while PFV models cover up to 400kVA for smaller inverter and charger qualification work. Both include built-in Low Voltage Ride Through (LVRT) and High Voltage Ride Through (HVRT) simulation, supporting compliance testing against IEEE 1547.1 and BDEW grid-code requirements — standards that specifically govern how grid-tie equipment must behave during voltage disturbances rather than simply disconnecting.
An optional harmonics waveform synthesis function generates up to 25 programmable harmonics, letting a test programme evaluate device behaviour under distorted grid conditions in addition to clean sinusoidal supply. Baseline performance is tight regardless — THD ≤1%, load regulation ≤1% into a resistive load, and input power factor ≥0.99 — important for ensuring the test system itself isn't introducing measurement uncertainty into compliance-critical grid-code testing.
