The past years have seen a remarkable growth of inverter-based resources in power grids. Conventionally, the inverter-based resources are controlled as current sources, following the phase of grid voltage, with the assumption that the grid voltage is stiff or slightly affected by the current injected from the inverter. This operation mode is commonly known as the grid-following (GFL) or grid-feeding mode. However, as the share of inverter-based resources increases in power grids, the voltages at the points of connection (PoCs) of inverters are not stiff any longer, and GFL inverters tend to be unstable.

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客座社论：关于并网逆变器的建模、拓扑和控制的特别章节


过去几年，电网中基于逆变器的资源显着增长。传统上，基于逆变器的资源被控制为电流源，跟随电网电压的相位，假设电网电压是刚性的或受从逆变器注入的电流的轻微影响。这种运行模式通常称为网格跟随（GFL）或网格馈送模式。然而，随着电网中基于逆变器的资源份额的增加，逆变器连接点（PoC）的电压不再僵硬，GFL逆变器往往不稳定。