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多电平静止无功发生器主电路拓扑综述

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静止无功发生器SVG能有效补偿无功功率，抑制谐波电流，提高电能质量。综述了多电平SVG的土电路拓扑结构，介绍了基本多电平SVG和新型多电平SVG的主电路拓扑结构，指出在高瓜大容量实用场合，采用二极管箝位型和级联型多电平结构的SVG装置应用较多，两相型SVG能够解决电气化铁道牵引负荷带来的负序、谐波和无功等电能质量问题，而在基本多电平结构上进行改进的新型多电平结构尚处于理论研究阶段，是未来研究重点。

The static var generator （SVG） can effectively compensate reactive power, suppressing harmonic currents and raising power quality. This paper summarized the main circuit topologies of multilevel SVG. Introduction was made to the basic multilevel SVG and the new type of main circuit topologies of multilevel SVG. It is pointed out that the SVG with multilevel structure of diode clamping or cascade connection was widely used in high-voltage and large-capacity practical situation. Two-phase SVG can solve problems of power quality, such as negative sequences, harmonics and reactive power caused by electrified rail traction, however, the new type of improved multilevel structure is still on the theoretical research stage, which will be the high ...