针对电容输出滤波LCC谐振变换器设计时预设阻抗角导致变换器效率较低的问题,分析了LCC谐振变换器死区时间、谐振阻抗角和损耗之间的关系,推导出满足软开关条件的最小阻抗角与死区时间,得到LCC谐振变换器阻抗角与死区时间的选择方法,并...针对电容输出滤波LCC谐振变换器设计时预设阻抗角导致变换器效率较低的问题,分析了LCC谐振变换器死区时间、谐振阻抗角和损耗之间的关系,推导出满足软开关条件的最小阻抗角与死区时间,得到LCC谐振变换器阻抗角与死区时间的选择方法,并以此为基础提出了谐振网络参数设计方法,使变换器在满足软开关条件的同时,阻抗角最小,减小了变换器损耗。用所提出的方法设计了160 W LCC谐振变换器电路,满载效率达到94.2%,实验结果证实该方法是有效的。展开更多
针对电容输出滤波的LCC谐振变换器阻抗角设置过大导致原边无功环流较大和变换器效率较低的问题,提出了最大负载时阻抗角为0°的谐振网络参数优化方法。用基波近似法得到电容输出滤波的LCC谐振变换器交流等效电路及其阻抗特性,然后...针对电容输出滤波的LCC谐振变换器阻抗角设置过大导致原边无功环流较大和变换器效率较低的问题,提出了最大负载时阻抗角为0°的谐振网络参数优化方法。用基波近似法得到电容输出滤波的LCC谐振变换器交流等效电路及其阻抗特性,然后推导出变换器在满载时谐振网络阻抗角为0°的条件,并在此基础上研究谐振网络参数优化方法,设计了150 W LCC谐振变换器,用SIMPLIS进行仿真分析。仿真结果证明,该方法能有效减小阻抗角,提高变换器效率。展开更多
The optical storage microgrid system composed of power electronic converters is a small inertia system.Load switching and power supply intermittent will affect the stability of the direct current(DC)bus voltage.Aiming...The optical storage microgrid system composed of power electronic converters is a small inertia system.Load switching and power supply intermittent will affect the stability of the direct current(DC)bus voltage.Aiming at this problem,a virtual inertia optimal control strategy applied to optical storage microgrid is proposed.Firstly,a small signal model of the system is established to theoretically analyze the influence of virtual inertia and damping coefficient on DC bus voltage and to obtain the constraint range of virtual inertia and damping coefficient;Secondly,aiming at the defect that the Sailfish optimization algorithm is easy to premature maturity,a Sailfish optimization algorithm based on the leak-proof net and the cross-mutation propagation mechanism is proposed;Finally,the virtual inertia and damping coefficient of the system are optimized by the improved Sailfish algorithm to obtain the best control parameters.The simulation results in Matlab/Simulink show that the virtual inertia control optimized by the improved Sailfish algorithm improves the system inertia as well as the dynamic response and robustness of the DC bus voltage.展开更多
文摘针对电容输出滤波LCC谐振变换器设计时预设阻抗角导致变换器效率较低的问题,分析了LCC谐振变换器死区时间、谐振阻抗角和损耗之间的关系,推导出满足软开关条件的最小阻抗角与死区时间,得到LCC谐振变换器阻抗角与死区时间的选择方法,并以此为基础提出了谐振网络参数设计方法,使变换器在满足软开关条件的同时,阻抗角最小,减小了变换器损耗。用所提出的方法设计了160 W LCC谐振变换器电路,满载效率达到94.2%,实验结果证实该方法是有效的。
文摘针对电容输出滤波的LCC谐振变换器阻抗角设置过大导致原边无功环流较大和变换器效率较低的问题,提出了最大负载时阻抗角为0°的谐振网络参数优化方法。用基波近似法得到电容输出滤波的LCC谐振变换器交流等效电路及其阻抗特性,然后推导出变换器在满载时谐振网络阻抗角为0°的条件,并在此基础上研究谐振网络参数优化方法,设计了150 W LCC谐振变换器,用SIMPLIS进行仿真分析。仿真结果证明,该方法能有效减小阻抗角,提高变换器效率。
基金the National Natural Science Foundation of China(52177184)。
文摘The optical storage microgrid system composed of power electronic converters is a small inertia system.Load switching and power supply intermittent will affect the stability of the direct current(DC)bus voltage.Aiming at this problem,a virtual inertia optimal control strategy applied to optical storage microgrid is proposed.Firstly,a small signal model of the system is established to theoretically analyze the influence of virtual inertia and damping coefficient on DC bus voltage and to obtain the constraint range of virtual inertia and damping coefficient;Secondly,aiming at the defect that the Sailfish optimization algorithm is easy to premature maturity,a Sailfish optimization algorithm based on the leak-proof net and the cross-mutation propagation mechanism is proposed;Finally,the virtual inertia and damping coefficient of the system are optimized by the improved Sailfish algorithm to obtain the best control parameters.The simulation results in Matlab/Simulink show that the virtual inertia control optimized by the improved Sailfish algorithm improves the system inertia as well as the dynamic response and robustness of the DC bus voltage.
