将模块化多电平变流器(modular multilevel converter,MMC)投入到固态变压器(solid state transformer,SST)系统中时通常采用比例积分微分(proportional integral derivative,PID)控制方法,但这种策略存在参数选取繁杂、动态性能较差的缺点.为了提高系统的动态性能并简化参数选取,提出了MMC-SST反馈线性化滑模控制策略.首先建立了MMC-SST整体仿真模型.然后建立了采用反馈线性化滑模控制的MMC-SST控制模型.最后利用MATLAB/Simulink平台将所提的控制方法与常规PID控制策略作了仿真比较,验证了所提反馈线性化滑模控制策略具备参数选择容易、动态性能优良的优势.
Feedback Linearization Sliding-Mode Control Strategy for MMC-SST Under Unbalanced Power Grid Voltage
When the modular multilevel converter(MMC)is put into the solid state transformer(SST)system,the proportional integral derivative(PID)control method is usually selected.However,this strategy has the disadvantages of complex parameters selection and poor dynamic performance.In order to improve the dynamic performance of the system and simplify parameter selec-tion,a feedback linearized sliding-mode control strategy for MMC-SST system is proposed.Firstly,the overall simulation model of MMC-SST is established.Then,a MMC-SST control model using feedback linearization sliding-mode control is established.Finally,the proposed control method is compared with the conventional PID control strategy through simulation using MATLAB/Simulink platform,verifying that the proposed feedback linearization sliding-mode control strategy has the advantages of easy parameter selection and excellent dynamic performance.
solid state transformermodular multilevel converterunbalanced power grid voltagefeedback linearization sliding-mode control
国家科技期刊平台
NSTL
万方数据
