基于三次谐波电压注入的扩展混合型MMC运行区域的控制方法  

Third harmonic voltage injection based control method with expanding the operation area of hybrid MMC

作　　者：李冠宏 路茂增 边敦新[1] 赵艳雷[1] 路梅雪 Li Guanhong;Lu Maozeng;Bian Dunxin;Zhao Yanlei;Lu Meixue(School of Electrical and Engineering,Shandong University of Technology,Zibo 255049,Shandong,China)

机构地区：[1]山东理工大学电气与电子工程学院,山东淄博255049

出　　处：《电测与仪表》2023年第8期164-170,共7页Electrical Measurement & Instrumentation

基　　金：国家重点研发计划子课题项目(2017YFB092800);山东省自然科学基金青年项目(ZR2020QE215)。

摘　　要：针对低直流电压运行工况下混合型MMC全桥子模块及半桥子模块电容电压不均衡问题,提出了一种基于三次谐波电压注入的改善方法。回顾了子模块电容电压不均衡问题机理,计算出子模块电容电压不均衡问题发生的边界条件以及混合型MMC安全运行区域。定量分析三次谐波电压幅值及初始相位对电容电压的影响规律,并计算出三次谐波电压注入对混合型MMC的运行区域的扩展效果。基于MATLAB/Simulink建立了双端仿真模型,验证了所提方法的有效性。Aiming at the problem of capacitor voltage imbalance in the full-bridge sub-module and the half-bridge sub-module of hybrid MMC under low DC voltage operation conditions,this paper proposed an improved method based on the third harmonic voltage injection.The mechanism of the capacitor voltage imbalance problem is reviewed,and calculates the boundary conditions for the sub-module capacitor voltage imbalance problem and the safe operating area of hybrid MMC.The influence law of the amplitude and initial phase of the third harmonic voltage on the capacitor voltage is analyzed,and the expansion effect of the third harmonic voltage injection on the expansion of operating area of the hybrid MMC is calculated quantitatively.A double-ended simulation model with MATLAB/Simulink is established,and the simulation results verify the effectiveness of the proposed method.

关 键 词：混合型MMC 低直流电压 运行区域 三次谐波电压 电容电压均衡 

分 类 号：TM72[电气工程—电力系统及自动化]