ASVG 几种典型主回路结构的谐波分析及比较

运用傅氏分析和向量叠加对新型静止无功发生器（ＡＳＶＧ）几种典型的主回路结构消除谐波的原理进行分析，得到不同结构装置的谐波与脉冲触发规律的函数关系，给出了电压波形畸变系数随控制参数变化的曲线，为各系统在最小谐波状态下运行提供了参考。最后，通过对各结构的谐波输出进行比较，认为使用三相三铁心柱变压器的星三角串联结构波形畸变系数小、结构简单易于控制、变压器成本较低，可作为适合国内目前ＡＳＶＧ发展的主回路方案

Harmonic analysis and comparison of several typical configuration for ASVG

? To obtain the required power rating and to keep the harmonic distortion of the oputput low, advanced static var generator (ASVG) must be combined with the multile inverters and transformers. Because many possible configurations may be adopted to realize the same rating, it is neccessary to compare various aspects of different configurations according to demands and conditions. In this paper, after the principles to eliminate harmonics of several typical configurations are analyzed, the mathematical function relations between the harmonic distortions and pulse trigger patterns are introduced, and the curves of output voltage THD(total harmonic distortion) varying with trigger parameters are proposed. To compare harmonic distortions of these configurations, star triple series connection circuit with three phase three iron pillar transformers is chosen as the first scheme suitable for the domestic ASVG development because of its less harmonic distortion, simpler configuration, better manageability and lower transformer costing.