基于矩阵变换器的UPFC简化调制模型预测控制  

Simplified modulation model predictive control of UPFC based on DMC

作　　者：程启明 张昕 赖宇生 李剑辉 沈章平 陈颖 CHENG Qiming;ZHANG Xin;LAI Yusheng;LI Jianhui;SHEN Zhangping;CHEN Ying(College 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：《电力自动化设备》2023年第6期183-189,共7页Electric Power Automation Equipment

基　　金：国家自然科学基金资助项目(61905139);上海市电站自动化技术重点实验室资助项目(13DZ2273800)。

摘　　要：基于直接矩阵变换器的统一潮流控制器(DMC-UPFC)减小了体积和成本,没有储能电容损坏的风险,提高了系统的可靠性。为了提高DMC-UPFC在使用模型预测控制(MPC)时的输出电能质量,根据矢量合成原理和空间矢量调制策略提出简化调制模型预测控制(SMMPC),简化了空间矢量的选择,同时解决了开关周期不固定的问题。根据扩展功率理论推导出不平衡工况下无需正负序分离的有功功率补偿(APC)策略保持有功功率稳定。仿真和实验结果表明,DMC-UPFC可实现线路潮流控制和无功补偿,SMMPC响应速度快,与MPC相比,SMMPC有着固定的开关周期,无需很高的采样频率也可以输出较高质量的波形,结合APC策略可以提高电网不平衡工况下的潮流控制性能。The unified power flow controller based on direct matrix converter(DMC-UPFC)reduces the size and cost,and has no risk of damage to the energy storage capacitor,which improves the system reliability.In order to improve the output quality of DMC-UPFC when using model predictive control(MPC),a simpli⁃fied modulation model predictive control(SMMPC)based on the vector synthesis principle and space vector modulation strategy is proposed,which can simplify the choice of vectors and solve the problem of variable switching period at the same time.According to the extension pq theory,an active power compensation(APC)strategy that does not require sequence separation under unbalanced conditions is derived to keep the active power stable.Simulative and experimental results show that DMC-UPFC can realize power flow control and reactive power compensation.SMMPC has fast dynamic response,and compared with MPC,SMMPC has a fixed switching period and can output high-quality waveforms even without high sampling frequency.Combined with the APC strategy,SMMPC can improve the power flow control performance under unbalanced power grid conditions.

关 键 词：直接矩阵变换器 统一潮流控制器 简化调制模型预测控制 不平衡电网 

分 类 号：TM341[电气工程—电机]