三相四线系统中三相不平衡、三相畸变、谐波等电能质量问题日益严重，静止无功发生器（StaticVarGen-erator）的研制成为解决这些问题的途径之一。基于改进ip-iq算法的三相四线指令电流的检测方法，能够将负载电流中的零序电流提取出来。应用该算法设计了带有裂相电容的三桥臂主电路结构，输出电流采用滞环控制，基于DSP研制了三相四线SVG的样机，搭建了大功率实验环境，对三相四线SVG的性能进行了实验验证，实验结果证明该装置对零序电流、谐波和无功功率的补偿效果非常明显。%Power quality problems such as three-phase imbalance and aberrance, harmonics and so on, have become serious increasingly and the development of SVG has been one of the ways to solve these problems. The detection algorithm based on ip-iq theory for command current in three-phase and four-wire system could extract the zero-sequence current from the load current. This algorithm was adopted to design the main circuit of three-leg with split phase capacitance and hysteresis control was used to regulate the output current. A prototype of SVG based on DSP, which provided experimental environment for high-power, was developed to test the performance of the SVG. The results proved that the compensation effect of the device on zero-sequence current, harmonics and reactive power is reliable.
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