基于三端口柔性多状态开关不同运行模式间的切换技术

柔性多状态开关(FMSS)作为一种可控电力电子装置,可提供精确的有功和无功功率流量控制,在馈线发生故障后,柔性多状态开关能迅速检测和隔离故障,并迅速恢复失电负载供电。文中建立了三端口FMSS的正常并网侧和故障离网侧的数学模型,分析了三端口FMSS在正常并网和故障离网两种运行模式下的工作原理和控制策略。采用控制器状态跟踪控制方法实现三端口FMSS的控制模式平滑切换,并与硬切换方式相比较,说明了该方法能平滑调节和稳定输出的优点。为了验证切换方法选择的实用性和有效性,在MATLAB/Simulink环境下搭建三端口FMSS仿真模型,获得三端口FMSS的不同运行模式下和切换过程中的动态响应特性。

Switching technology between different operating modes based on three-port flexible multi-state switch

Flexible multi-state switch (FMSS) is a controllable power electronic device that provides accurate active and reactive power flow control. When the feeder fails, the flexible multi-state switch can quickly detect and isolate faults, and quickly restore the power loss load. This paper establishes the mathematical model of the normal grid-connected side and the fault-off-grid side of the three-port FMSS, and analyzes the working principle and control strategy of the three-port FMSS in normal operation mode and fault off-grid operation mode. The controller state tracking control method is used to realize the smooth switching of the control mode of the three-port FMSS, and compared with the hard switching mode, the advantages of the method for smooth adjustment and stable output are illustrated. In order to verify the practicability and effectiveness of the selection of the switching method, a three-port FMSS simulation model was built in the MATLAB/Simulink environment to obtain the dynamic response characteristics of the three-port FMSS in different operating modes and during the switching process.