山东理工大学学报（自然科学版）
山東理工大學學報（自然科學版）
산동리공대학학보（자연과학판）
JOURNAL OF SHANDONG UNIVERSITY OF TECHNOLOGY(SCIENCE AND TECHNOLOGY)
2015年
1期
45-50
,共6页
逆变器%MMC%无源逆变%电容电压平衡%相电压谐波总畸变率
逆變器%MMC%無源逆變%電容電壓平衡%相電壓諧波總畸變率
역변기%MMC%무원역변%전용전압평형%상전압해파총기변솔
inverter%MMC%passive inversion%capacitor voltage balance%total harmonic distor-tion of phase voltage
基于模块化多电平逆变器在进行逆变时，无需外加的换相电压，具备自换相能力，可以工作在无源逆变方式，使利用直流输电为孤立负荷送电成为可能。在介绍MMC拓扑结构和换流工作原理的同时，分析了基于MMC逆变器的控制策略中的电容电压平衡控制策略和NLM 调制算法，并采用上述的控制策略利用PSCAD搭建9电平逆变器模型。通过分析子模块电容电压波动百分比和逆变产生的相电压谐波总畸变率验证搭建MMC模型的合理性。
基于模塊化多電平逆變器在進行逆變時，無需外加的換相電壓，具備自換相能力，可以工作在無源逆變方式，使利用直流輸電為孤立負荷送電成為可能。在介紹MMC拓撲結構和換流工作原理的同時，分析瞭基于MMC逆變器的控製策略中的電容電壓平衡控製策略和NLM 調製算法，併採用上述的控製策略利用PSCAD搭建9電平逆變器模型。通過分析子模塊電容電壓波動百分比和逆變產生的相電壓諧波總畸變率驗證搭建MMC模型的閤理性。
기우모괴화다전평역변기재진행역변시，무수외가적환상전압，구비자환상능력，가이공작재무원역변방식，사이용직류수전위고립부하송전성위가능。재개소MMC탁복결구화환류공작원리적동시，분석료기우MMC역변기적공제책략중적전용전압평형공제책략화NLM 조제산법，병채용상술적공제책략이용PSCAD탑건9전평역변기모형。통과분석자모괴전용전압파동백분비화역변산생적상전압해파총기변솔험증탑건MMC모형적합이성。
The module multilevel inverter doesn't need additional commutation voltage as it has the ability of commuting itself and working in a passive condition .The receiving end of power system is not only an active grid ,but also a passive grid .So it is possible to provide electricity power for isolated load by using direct current transmission .When this paper describes the topol‐ogical structure of MMC and principle of commutation ,it focus on analyzing strategy on balan‐cing capacitor voltage and NLM modulation algorithm , which belongs to control strategy of module multilevel inverter . At last , a simulation inverter model of 9 levels is built by PSCAD u‐sing the above metioned control strategy .Then the total harmonic distortion of phase voltage and the percentage of sub-module capacitor voltage fluctuation have been regarded as a index to meas‐ure the voltage quality and this index has been used to verify the rationality of 9 level module mul‐tilevel inverter model .
