基于双级矩阵变换器的线间潮流控制器

Interline Power Flow Controller Based on Two-stage Matrix Converter

线间潮流控制器是柔性交流输电系统中的新装置,通过控制有功和无功功率来增强电网传输能力。双级矩阵变换器是性能优良的交-交变频器。针对二者结构上的相似性,提出将双级矩阵变换器作为线间潮流控制器,以减小设备体积。首先对线间潮流控制器建模,在park变换基础上,使用比例积分控制设计d-q轴控制方案,采用交叉解耦消除电网间的耦合,利用载波调制的空间矢量控制变换器开关动作,取得了较好的控制效果。仿真验证了方案的可行性和正确性。

The Interline Power Flow Controller （IPFC） is one of the newest devices within the FACTS （ Flexible AC Transmission Systems） family. It can increase power grid transmission capacity by controling real and reactive power flow. The two-stage matrix converter （TSMC） is a novel type of direct AC-AC power converter, and possesses many advantages over traditional counterparts. According to the similarities of the IPFC and TSMC, a new concept using two-stage matrix converter as the main converter of the interline power flow controller is proposed for capacitor-free advantage. A mathematical model of Interline Power Flow Controller has been presented based on park transformation. Then PI control- lers have been used on the d -q coordination in a decoupling control approach, to suppress the interference of the grid. The converter＇s switches are modulated in a carrier modulation approach for the space vector counterpart, and excellent results have been observed. Matlab/Simulink simulations demonstrated the validity of the conclusion.