摘要
提出了一种新的STATCOM主电路拓扑结构,它由N个级联的多绕组变压器隔离型变换器构成,每个多绕组变压器隔离型变换器由1个多绕组变压器和M个变换器构成,每个多绕组变压器的M个副边绕组与M个变换器相连,M×N个变换器公用一个电容。所提结构由于同时避免了单个器件的串联和并联,从而有效地提高了装置的可靠性;采用载波移相的SPWM调制策略可同时优化输出电压和输出电流的谐波性能。所采用的多绕组变压器的副边绕组之间不需要错相位,错相位由变换器的控制器完成。给出了一种恒无功运行模式下的解耦控制方案。基于Matlab/Simulink的仿真结果证明了所提结构的良好性能和所提控制策略的有效性。
Abstract： A main circuit topology of STATCOM（STATic synchronous COMpensator） is presented, which has N cascaded multi- winding-transformer-isolated converters. Each converter consists of one multi- winding transformer and M converters. Each multi- winding transformer has M secondary windings connecting with M converters separately. M×N converters share one capacitor. The proposed topology avoids both serial and parallel connection of devices,which improves device reliability effectively. The phase- shifted SPWM is used to decrease the harmonics in both output voltage and output current. The secondary windings of multi-winding transformer are not phase-staggered,which is accomplished by the controller of converter. A decoupling control scheme under constant reactive power operation mode is also proposed. Simulations with Matlab/Simulink verify the performance of orooosed toooloa, v and the effectiveness of pronosed cantrol scheme.
出处
《电力自动化设备》
EI
CSCD
北大核心
2007年第12期5-9,共5页
Electric Power Automation Equipment
基金
教育部新世纪优秀人才支持计划(NCET-04-0710)~~
关键词
多绕组变压器隔离型变换器
级联
相移SPWM
谐波畸变率
静止无功补偿
multi-winding-transformer-isolated converter
cascade
phase-shifted SPWM
harmonicdistortion factor
static synchronous compensator
