电网不平衡条件下基于滑模控制TLDMC输入功率控制  

Input Power Control of TLDMC Based on Sliding Mode Control Under Unbalanced Grid Voltage

作　　者：程启明 叶培乐 魏霖 邵宇鹰 彭鹏 翟登辉[3] CHENG Qiming;YE Peile;WEI Lin;SHAO Yuying;PENG Peng;ZHAI Denghui(Automation Engineering,Shanghai University of Electric Power,Shanghai 200091,China;State Grid Shanghai Electric Power Company,Shanghai 200122,China;Xuji Group Co.,Ltd.,Xuchang 461000,China)

机构地区：[1]上海电力大学自动化工程学院,上海200091 [2]国网上海市电力公司,上海200122 [3]许继集团有限公司,许昌461000

出　　处：《高电压技术》2021年第12期4440-4450,共11页High Voltage Engineering

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

摘　　要：为了完善三电平直接矩阵变换器(three-level direct matrix converter,TLDMC)的输入控制,对TLDMC的输入功率控制进行了研究,主要对输入无功电流的相关控制方法进行设计。首先,对传统矩阵变换器和TLDMC进行了对比介绍;其次,简要介绍了TLDMC的间接空间矢量调制方法的原理;然后,对TLDMC的输入侧建立了数学模型并推导出了其PID和准PR控制方法,再结合电网不平衡情况下TLDMC输入功率和输出电压补偿方法,提出了一种基于滑模控制(sliding mode control,SMC)的带电压补偿的输入电流控制系统,同时将此方法与传统PID控制、准PR控制相比较;最后,通过实验验证了所提控制方法的正确性和有效性。实验结果表明,所提控制可以实现期望的控制目标,且在控制性能上明显优于PID和准PR控制。In order to improve the input control of the three-level direct matrix converter(TLDMC),this paper studies the input power control of TLDMC and mainly designs the control method of input reactive current.First of all,the traditional matrix converter and TLDMC are compared and introduced.Secondly,the principle of indirect space vector modulation method used in TLDMC is briefly introduced.Then,a mathematical model is established on the input side of TLDMC,and the control methods for PID and quasi-PR are derived.Furthermore,combined with the TLDMC input power and output volt-age compensation method under unbalanced grid voltages,a sliding mode control(SMC)based input current control system is proposed.The method is compared with traditional PID control.Finally,the correctness of PID control method,quasi-PR control methods and SMC control method is verified by simulation.The comparison between the results of PID,quasi-PR control method and SMC shows that,although PID and quasi-PR control can achieve the desired control target,SMC is more superior in response speed.

关 键 词：电网不平衡 三电平直接矩阵变换器 滑模控制 输入功率控制 电压补偿 空间矢量调制 

分 类 号：TM46[电气工程—电器]