Fault Ride-Through (FRT)
FRT in PV Systems
Similarly, abruptly taking a high-scapacity, frid-tied photovoltaic (PV) system offline introduces disturbances into the power grid that have a significant and advertse impact on power quality. To preven this issue, the regulations governing such grid-tied systems have been updated to require PV equipment to incorporate fault ride-through (FRT) functionality. Also note that FRT grid codes vary from country to country.
How Should FRT Work?
FRT capabilities vary from equipment to equipment, and sometimes it takes a few seconds before the voltage returns to the nominal level. In a PV system, FRT functionality allows it to continue operating even if the grid experiences a period of reduced voltage lasting 1 second or less. Specifically, when the FRT function operates, it becomes necessary to observe the voltage waveform for about 5 seconds after the drop in order to verify the stability of the grid. A power quality analyzer capable of capturing the power situation both before and after such an event is useful in order to meet this requirement.
1 Select the AC or AC/DC clamp and flexible sensors appropriate for the equipment or PV system under test. Hioki sensors can be directly powered by the PQA without the need for batteries or separate AC adapters to streamline the work environment
2. Use the PQ3100’s QuickSet wizard to easily and correctly wire, configure, and measureWide range sensors that measure accurately even at 1/100 of the rated current, letting you use a single clamp to cover from very low to very high currents
3. Use the free GENNECT Cross for Windows software application to report the voltage recovery and verify proper operation of equipment