雷彪,周耀,杨兴武.混合型模块化多电平换流器的模型预测控制方法[J].电测与仪表,2017,54(13):. Lei Biao,Zhou Yao,Yang Xingwu.Model Predictive Control of a Hybrid Modular Multilevel Converter[J].Electrical Measurement & Instrumentation,2017,54(13):.
混合型模块化多电平换流器的模型预测控制方法
Model Predictive Control of a Hybrid Modular Multilevel Converter
A hybrid topology of modular multilevel converter (MMC) is presented, which adds an H-bridge cell to each bridge of traditional topology. Two closed-loop control strategy based on proportion integration (PI) controller of hybrid MMC have many problems such as need excessive parameter controllers, complex parameter tuning, sensitive to parameters. Combining with sub-modules capacitor voltage sorting strategy and H-bridge module control algorithm, a hierarchical control method based on model predictive control (MPC) is proposed, which takes separate control on ac current, circulating current and submodular voltage on the basis of establishing of corresponding cost function, thus to determine the switching state of each module. Compared with traditional control method, the method is simple in principle and no PI parameters needed and has excellent static and dynamic performance. At last, a hybrid MMC simulation platform is constructed, and the simulation results show that the proposed control strategy is of feasibility and correctness.
