基于五桥臂MMC-UPQC的复合模型预测控制研究  

Hybrid model predictive control based on a five-leg MMC-UPQC

作　　者：李金洪 周建萍 夏文豪 龚益琳 LI Jinhong;ZHOU Jianping;XIA Wenhao;GONG Yilin(School of Automation Engineering,Shanghai University of Electric Power,Shanghai 200090,China)

机构地区：[1]上海电力大学自动化工程学院,上海200090

出　　处：《电力系统保护与控制》2024年第11期179-187,共9页Power System Protection and Control

基　　金：国家自然科学基金项目资助(61905139);上海市“科技创新行动计划”地方院校能力建设专项项目资助(19020500700)。

摘　　要：针对模块化多电平统一电能质量调节器(modular multilevel unified power quality conditioner, MMC-UPQC)六桥臂结构下的单相桥臂故障问题,提出了一种五桥臂拓扑,这种新型拓扑可实现故障情况下的电能质量补偿。首先,对MMC-UPQC串并联侧的数学模型进行分析,提出了一种复合模型预测控制(hybrid model predictive control,H-MPC),所提控制方法结合了有限集模型预测控制(finite-control-set model predictive control, FCS-MPC)以及快速模型预测控制(fast model predictive control, F-MPC)。然后,通过构建两侧独立的价值函数减少了控制方法的计算量,同时也实现了五桥臂解耦控制。最后,相比传统线性(例如PI)和非线性(例如无源控制passivity-based control,PBC)的控制策略,所提复合模型预测控制在电压补偿、负序电压抑制以及谐波电流补偿等方面具有一定优势,并在一定程度上避免了复杂的参数整定及坐标变化环节。仿真实验结果证明了所提控制方法的可行性和优越性。A five-leg topology is proposed for a single-phase fault in the six-leg structure of a modular multilevel unified power quality conditioner(MMC-UPQC).This new topology enables power quality compensation in fault conditions.First,after an analysis of the mathematical model of MMC-UPQC in the series and parallel sides,a hybrid model predictive control(H-MPC)is proposed for those sides of the MMC-UPQC.The proposed control method combines finite control set model predictive control(FCS-MPC)and fast model predictive control(Fast-MPC).Then,the computational burden of the control method is reduced by constructing independent cost functions on both sides and the decoupled control of the five-leg topology is also achieved.Finally,compared to traditional linear(for example PI)and nonlinear control strategies(for example passivity-based control,PBC),the proposed hybrid model predictive control has certain advantages in voltage compensation,negative sequence voltage suppression,and harmonic current compensation.It can also avoid complex parameter tuning and coordinate transformation to some extent.Simulation results demonstrate the feasibility and superiority of the proposed control method.

关 键 词：桥臂故障 电能质量 模块化多电平统一电能质量调节器 五桥臂拓扑 复合模型预测控制 

分 类 号：TM711[电气工程—电力系统及自动化]