针对由电网不对称引起的Vienna整流器有功功率波动和电流不对称问题,介绍了有功功率波动的抑制控制APFSC(active power fluctuation suppression control )和对称的正序电流控制SPSCC(symmetric positivesequence current control )。...针对由电网不对称引起的Vienna整流器有功功率波动和电流不对称问题,介绍了有功功率波动的抑制控制APFSC(active power fluctuation suppression control )和对称的正序电流控制SPSCC(symmetric positivesequence current control )。由于受到功率器件的电流限制,采用APFSC会导致Vienna整流器运行的最大有功功率降低;采用SPSCC可以扩展Vienna整流器运行的最大有功功率,但有功功率波动较大。基于此,提出1种改进的功率控制IPC(improved power control )策略。当Vienna整流器处理功率较小时,以保持有功功率无波动为首要目标,此时IPC与APFSC的效果一致,对比SPSCC,IPC可有效抑制有功功率的波动;当Vienna整流器处理功率较大时,以满足功率需求为首要目标,但尽可能地减小有功功率波动,此时APFSC无法满足功率需求,但IPC可以满足有功功率需求,且在满足功率需求的前提下,对比SPSCC,IPC下有功功率的波动更小。最后通过实验验证了控制方法的优越性。展开更多
The Chinese Opera Season 2025 and International Exhibition of Chinese Opera opened in Vienna,the capital of Austria,on the evening of April 5.As the opening performance of the Season,a traditional Wu Opera(a local ope...The Chinese Opera Season 2025 and International Exhibition of Chinese Opera opened in Vienna,the capital of Austria,on the evening of April 5.As the opening performance of the Season,a traditional Wu Opera(a local opera in Zhejiang Province)scene"the Legend of the White Snake"was performed at the Muth Theatre in Vienna,drawing enthusiastic responses.展开更多
The growing demand for efficient high-power switching power supplies has spurred interest in advanced topologies.The three-phase VIENNA converter stands out for its high power factor,simplified structure,and robust pe...The growing demand for efficient high-power switching power supplies has spurred interest in advanced topologies.The three-phase VIENNA converter stands out for its high power factor,simplified structure,and robust performance.Current research focuses on its operational principles,control strategies,and behavior under various load conditions.Key considerations include component selection,thermal management,and EMI/EMC optimization.This topology finds applications across renewable energy systems,industrial equipment,telecommunications,and electric vehicle charging infrastructures.Comparative analyses with alternative topologies and cost-benefit evaluations are also addressed.Future developments are expected to emphasize the integration of wide-bandgap devices and advancements in digital control techniques to further enhance efficiency and system performance.展开更多
三相三电平VIENNA整流器作为三电平Boost型中点箝位(neutral point clamped,NPC)结构变换器一种,具有电路结构简单、开关电压应力小、输入电流谐波含量低、可实现输入单位功率因数校正等优点,适合应用于高压中大功率场合。同时,三相功...三相三电平VIENNA整流器作为三电平Boost型中点箝位(neutral point clamped,NPC)结构变换器一种,具有电路结构简单、开关电压应力小、输入电流谐波含量低、可实现输入单位功率因数校正等优点,适合应用于高压中大功率场合。同时,三相功率因数校正(power factor correction,PFC)整流器的单周期控制方案因其控制简单,无需乘法器及采用输入电压受到广泛研究。输出中点电位波动是NPC结构变换器的一个固有问题,以基于单周期控制的三相三电平VIENNA整流器为研究对象,详细地分析整流器输出中点电位波动机理,根据单周期控制方案的特点,提出在三相输入电流采样中注入三次谐波电流分量,同时分析三次谐波电流注入后对整流器输出中点电位的影响,给出三次谐波电流最佳注入系数。在此基础之上,向传统单周期控制系统中继续引入均压环路,使得最终改进后的三相三电平VIENNA整流器单周期控制系统一方面可以提高整流器直流母线电压利用率,另一方面可以有效抑制中点电位的直流和交流波动。仿真与实验验证了所提出的改进单周期控制策略对于整流器输出中点电位平衡控制的有效性。展开更多
文摘针对由电网不对称引起的Vienna整流器有功功率波动和电流不对称问题,介绍了有功功率波动的抑制控制APFSC(active power fluctuation suppression control )和对称的正序电流控制SPSCC(symmetric positivesequence current control )。由于受到功率器件的电流限制,采用APFSC会导致Vienna整流器运行的最大有功功率降低;采用SPSCC可以扩展Vienna整流器运行的最大有功功率,但有功功率波动较大。基于此,提出1种改进的功率控制IPC(improved power control )策略。当Vienna整流器处理功率较小时,以保持有功功率无波动为首要目标,此时IPC与APFSC的效果一致,对比SPSCC,IPC可有效抑制有功功率的波动;当Vienna整流器处理功率较大时,以满足功率需求为首要目标,但尽可能地减小有功功率波动,此时APFSC无法满足功率需求,但IPC可以满足有功功率需求,且在满足功率需求的前提下,对比SPSCC,IPC下有功功率的波动更小。最后通过实验验证了控制方法的优越性。
文摘The Chinese Opera Season 2025 and International Exhibition of Chinese Opera opened in Vienna,the capital of Austria,on the evening of April 5.As the opening performance of the Season,a traditional Wu Opera(a local opera in Zhejiang Province)scene"the Legend of the White Snake"was performed at the Muth Theatre in Vienna,drawing enthusiastic responses.
文摘The growing demand for efficient high-power switching power supplies has spurred interest in advanced topologies.The three-phase VIENNA converter stands out for its high power factor,simplified structure,and robust performance.Current research focuses on its operational principles,control strategies,and behavior under various load conditions.Key considerations include component selection,thermal management,and EMI/EMC optimization.This topology finds applications across renewable energy systems,industrial equipment,telecommunications,and electric vehicle charging infrastructures.Comparative analyses with alternative topologies and cost-benefit evaluations are also addressed.Future developments are expected to emphasize the integration of wide-bandgap devices and advancements in digital control techniques to further enhance efficiency and system performance.
文摘三相三电平VIENNA整流器作为三电平Boost型中点箝位(neutral point clamped,NPC)结构变换器一种,具有电路结构简单、开关电压应力小、输入电流谐波含量低、可实现输入单位功率因数校正等优点,适合应用于高压中大功率场合。同时,三相功率因数校正(power factor correction,PFC)整流器的单周期控制方案因其控制简单,无需乘法器及采用输入电压受到广泛研究。输出中点电位波动是NPC结构变换器的一个固有问题,以基于单周期控制的三相三电平VIENNA整流器为研究对象,详细地分析整流器输出中点电位波动机理,根据单周期控制方案的特点,提出在三相输入电流采样中注入三次谐波电流分量,同时分析三次谐波电流注入后对整流器输出中点电位的影响,给出三次谐波电流最佳注入系数。在此基础之上,向传统单周期控制系统中继续引入均压环路,使得最终改进后的三相三电平VIENNA整流器单周期控制系统一方面可以提高整流器直流母线电压利用率,另一方面可以有效抑制中点电位的直流和交流波动。仿真与实验验证了所提出的改进单周期控制策略对于整流器输出中点电位平衡控制的有效性。
