中国电机工程学报
中國電機工程學報
중국전궤공정학보
ZHONGGUO DIANJI GONGCHENG XUEBAO
2013年
24期
74-81
,共8页
熊桥坡%罗安%帅智康%马伏军%黎小聪
熊橋坡%囉安%帥智康%馬伏軍%黎小聰
웅교파%라안%수지강%마복군%려소총
级联多电平逆变器%静止无功发生器%单载波%直流侧电压%平衡控制
級聯多電平逆變器%靜止無功髮生器%單載波%直流側電壓%平衡控製
급련다전평역변기%정지무공발생기%단재파%직류측전압%평형공제
cascade multilevel inverters%static var generator (SVG)%single-carrier modulation strategy%DC-side voltage%DC voltage balance control
多电平脉宽调制策略是级联型静止无功发生器(static var generator,SVG)的核心技术。提出一种改进的载波同相层叠调制策略,即单载波调制策略,采用单路三角形载波实现多电平调制,兼有载波同相层叠调制良好的消谐特性和载波移相调制开关分配均衡的优点;针对级联型SVG直流侧电压不平衡现象,提出一种参考直流侧电压排序的开关分配策略;将单载波调制策略与电压电流双闭环控制结合,应用于级联型SVG。最后,利用PSIM仿真软件搭建级联型SVG仿真模型,对比基于单载波调制的控制方案和传统控制方案的电压平衡控制效果,验证单载波调制及控制方案的有效性;在低压环境搭建七电平SVG实验样机,验证所提方法的可行性。
多電平脈寬調製策略是級聯型靜止無功髮生器(static var generator,SVG)的覈心技術。提齣一種改進的載波同相層疊調製策略,即單載波調製策略,採用單路三角形載波實現多電平調製,兼有載波同相層疊調製良好的消諧特性和載波移相調製開關分配均衡的優點;針對級聯型SVG直流側電壓不平衡現象,提齣一種參攷直流側電壓排序的開關分配策略;將單載波調製策略與電壓電流雙閉環控製結閤,應用于級聯型SVG。最後,利用PSIM倣真軟件搭建級聯型SVG倣真模型,對比基于單載波調製的控製方案和傳統控製方案的電壓平衡控製效果,驗證單載波調製及控製方案的有效性;在低壓環境搭建七電平SVG實驗樣機,驗證所提方法的可行性。
다전평맥관조제책략시급련형정지무공발생기(static var generator,SVG)적핵심기술。제출일충개진적재파동상층첩조제책략,즉단재파조제책략,채용단로삼각형재파실현다전평조제,겸유재파동상층첩조제량호적소해특성화재파이상조제개관분배균형적우점;침대급련형SVG직류측전압불평형현상,제출일충삼고직류측전압배서적개관분배책략;장단재파조제책략여전압전류쌍폐배공제결합,응용우급련형SVG。최후,이용PSIM방진연건탑건급련형SVG방진모형,대비기우단재파조제적공제방안화전통공제방안적전압평형공제효과,험증단재파조제급공제방안적유효성;재저압배경탑건칠전평SVG실험양궤,험증소제방법적가행성。
The multi-level pulse width modulation strategy is the core technology of the Cascade SVG. This paper presents an improved carrier phase disposition modulation strategy, namely single-carrier modulation strategy. This improved modulation strategy, which uses a single triangular carrier to achieve multi-level modulation, has advantages of both good harmonic characteristics of carrier phase disposition modulation and switch balanced distribution by carrier phase shifted modulation. Aim at the DC side voltage imbalance of the Cascade SVG, this paper presents a switching allocation strategy refer to DC voltage;The combination of single-carrier modulation strategy and the voltage and current double loop control is applied to the Cascade SVG. Finally, the proposed modulation strategy and control method was verified by the PSIM simulation and the SVG prototype.