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详细阐述了基于 48脉波电压源逆变器的静止同步串联补偿器 (SSSC)的实现、控制系统设计及建模 ,在 8个三相逆变器的输出电压回路中增加了 1个电磁回路 ,该回路由18个单相三绕组变压器和 6个单相双绕组变压器组成 ,基于这个电路设计 ,提出了对应的等值回路模型及相应的比例积分 (PI)控制方案 ,比例积分控制器的增益是通过对IEEE第 1个次同步谐振分析模型 (FBM )进行特征根分析而确定的 ,仿真结果表明控制器的增益选择至关重要 ,不当的增益会引起轴系扭矩增大而发生振荡。
The realization of SSSC and the control system design and modeling based on 48-pulse voltage source inverter are described in detail. An electromagnetic loop is added to the output voltage loop of 8 three-phase inverters The circuit consists of 18 single-phase three-winding transformers and 6 single-phase double-winding transformers. Based on this circuit design, the corresponding equivalent circuit model and corresponding proportional integral (PI) control scheme are proposed. The proportional integral controller The gain is determined by eigen-root analysis of the IEEE 1st-order SSR model. The simulation results show that the controller’s gain selection is crucial. Improper gain can cause the shaft torque to increase and oscillate.