Low-Voltage Ride-Through Technology in Photovoltaic Power Generation

Abstract

As global photovoltaic (PV) integration surges, the ramifications of PV systems on the power grid have become increasingly pronounced. When faced with grid disturbances or faults, the abrupt disconnection of PV systems can critically imperil grid stability. In light of this, the low-voltage ride-through (LVRT) technology, pivotal for resilient grid fault recovery, stands out as an essential topic in PV power generation's advancement. This paper initiates a deep dive into the contemporary prerequisites for PV LVRT capabilities and delineates pathways for their effective realization. It then meticulously unpacks the evolution and multifaceted methods associated with the twin primary LVRT strategies: the assimilation of auxiliary apparatuses and the nuanced control of inverters. A critical analysis is presented in the succeeding sections, contrasting these cardinal strategies' relative merits and demerits and their diverse implementation modalities. The paper culminates with insightful recommendations, positioning itself as an invaluable scaffold for subsequent scholarly explorations in PV LVRT paradigms.