Key Technologies and Innovation Prospects of Large-Capacity Voltage Sourced Inverter in the Construction of New Power Systems

MA Weimin; LI Ming; XUE Yinglin; WANG Yingxin; WU Fangjie; ZHAO Zheng; LI Tan

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Electric Power Construction ›› 2025

Key Technologies and Innovation Prospects of Large-Capacity Voltage Sourced Inverter in the Construction of New Power Systems

MA Weimin, LI Ming, XUE Yinglin, WANG Yingxin, WU Fangjie, ZHAO Zheng, LI Tan

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Abstract

[Objective] The large-capacity SVG based on modular multi-level technology can realize various functions such as active network construction, reactive power compensation, harmonic suppression, impedance remodeling, etc., and is an important equipment to support the construction of new power systems. [Methods] This paper discuss the key technologies and innovation prospects of large-capacity voltage sourced inverter in the construction of new power systems, reviews the development history and basic topological principles of SVG, sorts out the evolutionary conversion relationship between SVG and modular multilevel converter (MMC), analyzes the quantitative evaluation formula of AC grid strength supporting by SVG, and summarizes the advantages of SVG to ensure the safe and stable operation of the new power system with a high proportion of new energy and a high proportion of power electronic equipment. Then, the key technologies such as SVG-based multi-source commutation converter technology (SLCC), active filter, grid-forming SVG, and energy storage type SVG were analyzed. Finally, the key role that SVG play in constructing new power system and the key research directions in the future are prospected. [Results] In the construction of future new power systems, large-capacity SVG holds broad application prospects in areas such as large-scale new energy island export, weak system voltage support, and wide-area harmonic suppression. [Conclusions] Further in-depth research is needed on SVG pre-charging and black start, as well as coordinated control among multiple SVGs in isolated new energy systems.

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new power system / grid strength / multi-source commutation / active filtering / grid forming SLCC

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MA Weimin, LI Ming, XUE Yinglin, WANG Yingxin, WU Fangjie, ZHAO Zheng, LI Tan. Key Technologies and Innovation Prospects of Large-Capacity Voltage Sourced Inverter in the Construction of New Power Systems[J]. Electric Power Construction. 2025

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