基于UPFC的柔性倒闸控制器

Research on Flexible Switching Controller Based on UPFC

在电力系统倒闸操作过程中,母联开关直接进行刚性合闸时将会在环形网络中产生较大冲击电流,严重威胁电力系统安全运行。针对这一问题,文中设计了基于UPFC的柔性倒闸控制器。通过分析UPFC的拓扑结构和工作原理,提出适用于母联开关倒闸的控制器拓扑结构,然后设计倒闸控制器并联结构对合闸时电压幅值进行调节,并通过电压相位的调整,设计控制器的串联结构。仿真验证结果显示,柔性倒闸控制器可以使两段母线的端电压向量快速达到一致,实现无环流倒闸操作。

The busbar switch directly performs rigid closing during the power system switching operation,and a large inrush current will be generated in the ring network,which seriously threatens the safe operation of the power system.Thus,a flexible switching controller based on UPFC is designed.By analyzing the topology structure and working principle of the unified power flow controller,the topology structure of the controller suitable for the busbar switch tripping is proposed.The parallel structure of the tripping controller is designed to adjust the voltage amplitude during closing,and the controller series structure is designed to adjust the voltage phase.The simulation verification results show that the flexible switching controller can make the terminal voltage vectors of the two busbars quickly reach the same,and realize the non-circulating current switching operation without circulating current.