Under the global low-carbon transition trend of energy

inverter-based resources (IBRs)

represented by wind and photovoltaic power

are gradually becoming the dominant generation in power systems. However

contemporary IBRs predominantly prioritize active power injection

often lacking sufficient dynamic voltage support during grid faults

thereby jeopardizing power system stability. To avoid transient voltage instability in IBR-dominated systems

it is critical to enhance dynamic voltage support capability of converters while respecting their current-limiting constraints. This paper provides a comprehensive review of grid following (GFL) and grid forming (GFM) converters dynamic voltage support technologies from following three aspects: power system requirements

control design

and future research directions. First

transient voltage stability issues are categorized based on dominant instability dynamics

and dynamic voltage support requirements are derived from grid codes. Next

the generalized control structures of GFL and GFM converters are outlined

and their dynamic voltage support intrinsic mechanisms are analyzed from control variable perspective. Subsequently

different control structures of dynamic voltage support strategies for GFL and GFM converters are elaborated

along with a comparative analysis of their advantages and disadvantages. Finally

future research directions for GFL and GFM converters dynamic voltage support technologies are discussed.