标题： 对称与不对称故障下的网格形成矢量电流控制低电压穿越模式 显示英文标题

标题： Grid-Forming Vector Current Control FRT Modes Under Symmetrical and Asymmetrical Faults

摘要： 最近的研究表明，使用电网形成矢量电流控制（GFVCC）方案操作并网转换器具有显著优势，包括控制架构的简单性和模块化，以及能够从基于锁相环的电网跟随控制无缝过渡到电网形成。 任何并网转换器控制策略的重要方面是处理电网故障情况，例如对称和不对称短路故障。 本文提出了几种针对GFVCC的故障穿越（FRT）策略，使转换器能够在遵守转换器硬件限制并保持电网形成行为的同时提供故障电流并保持与电网同步。 转换器控制方案以模块化的方式扩展，以包含负序环，并且所提出的FRT策略解决了对称和不对称故障。 所提出的FRT策略通过案例研究进行了分析，包括无限大母线设置和多单元电网。 显示英文摘要

摘要： Recent research has shown that operating grid-connected converters using the grid-forming vector current control (GFVCC) scheme offers significant benefits, including the simplicity and modularity of the control architecture, as well as enabling a seamless transition from PLL-based grid-following control to grid-forming. An important aspect of any grid-connected converter control strategy is the handling of grid-fault scenarios such as symmetrical and asymmetrical short-circuit faults. This paper presents several fault ride-through (FRT) strategies for GFVCC that enable the converter to provide fault current and stay synchronized to the grid while respecting the converter hardware limitations and retaining grid-forming behavior. The converter control scheme is extended in a modular manner to include negative-sequence loops, and the proposed FRT strategies address both symmetrical and asymmetrical faults. The proposed FRT strategies are analyzed through case studies, including infinite-bus setups and multi-unit grids.