基于模糊逻辑的柔性多状态开关协调控制策略

为抑制系统干扰对多端柔性多状态开关(FMS)直流侧电压及交流侧输出功率的影响,提出一种基于模糊逻辑的新型协调控制策略.文中设置定直流电压控制端口与下垂控制端口,从直流电压稳态偏差和系统稳定时间入手,分析不同工况下系统对下垂系数的需求;之后,设计出一种基于模糊逻辑的可变下垂系数,可根据直流电压的偏差大小及其变化趋势实时改...

Fuzzy Logic Based Coordinated Control Strategy for Flexible Multi-state Switch

In order to suppress the influence of system disturbance on DC-side voltage and AC-side output power of a multi-port flexible multi-state switch (FMS), a new coordinated control strategy based on the fuzzy logic is proposed. This paper sets the constant DC voltage control port and the droop control port, and analyzes the system demands for the droop coefficient under different operation conditions from the steady state error of DC voltage and system stabilization time. Then, a kind of variable droop coefficient based on fuzzy logic is designed, which can change in real time according to the deviation of DC voltage and its changing trend, so as to accelerate the system stabilization process and avoid the influence of improper setting of the droop coefficient on the system control performance. Finally, a model of four-port FMS based on the modular multilevel converter is built in MATLAB/Simulink platform, and the effectiveness of the proposed strategy is verified by the simulations compared with the traditional coordinated control strategies.