The purpose of low voltage ride through the requirement for utility-interactive type inverters like microinverters, string inverters, and central inverters is to maintain the grid stability, power loss reduction, voltage support/boost by reactive power support during sudden fluctuations in grid voltage. In this paper, the performance of solar PV-based grid-connected central inverters of 350 kW is evaluated during its operation of low voltage ride through (LVRT), high voltage ride through (HVRT), and frequency ride through (FRT). The evaluation is based on “Technical Standards for grid connectivity,” published by CEA, India, in February 2019. The inverter is evaluated at a power of 350 kW using the grid simulator of the 540 kVA facility available at the CPRI laboratory. The LVRT, HVRT, and FRT results show that this central inverter can qualify for the fault ride-through requirements mentioned in the CEA Regulations 2019. This paper also shows the gaps in the standard for evaluating the fault ride-through in an inverter and recommends a few suggestions that need improvement to make the standard more stringent and clearer. Finally, the proposed recommendations' industrial implications and limitations are provided in the conclusion section.

低电压穿越对微型逆变器、组串式逆变器、集中式逆变器等市电互动型逆变器的要求的目的是在电网电压突然波动时维持电网稳定、减少功率损耗、通过无功功率支持实现电压支撑/升压。本文对350kW太阳能光伏并网集中式逆变器在低压穿越（LVRT）、高压穿越（HVRT）和频率穿越（FRT）运行过程中的性能进行了评估。该评估基于印度 CEA 于 2019 年 2 月发布的“电网连接技术标准”。使用 CPRI 实验室提供的 540 kVA 设施的电网模拟器，以 350 kW 的功率对逆变器进行评估。LVRT、HVRT 和 FRT 结果表明，该集中式逆变器符合 2019 年 CEA 法规中提到的故障穿越要求。本文还指出了逆变器故障穿越评估标准中的差距，并提出了建议一些需要改进的建议，使标准更加严格和清晰。最后，结论部分提供了所提出建议的工业影响和局限性。