This paper presents improvement tests based in a feedback-current controller designed to Tracking Maximum Power Point in photovoltaic system (MPPT-PV). Previously, a version was developed exhibiting results satisfacto...This paper presents improvement tests based in a feedback-current controller designed to Tracking Maximum Power Point in photovoltaic system (MPPT-PV). Previously, a version was developed exhibiting results satisfactory in simulation and through of a low cost prototype. Now, using a sophisticated physical model of solar cell available in PSIM program is shown other cases, considering variations both irradiation and temperature to evaluate successfully the controller. The results show that its system is suitable under dynamical changing atmospheric conditions operating with effectiveness acceptable.展开更多
本文以反激变换器为主电路拓扑,设计了一台80 W LED恒流驱动电源,其控制核心为TL494 PWM芯片,通过电流负反馈实现反馈控制。采用隔离驱动芯片将系统功率部分与控制部分隔离,提高系统的可靠性与抗干扰性。分析了电路的基本结构及其工作原...本文以反激变换器为主电路拓扑,设计了一台80 W LED恒流驱动电源,其控制核心为TL494 PWM芯片,通过电流负反馈实现反馈控制。采用隔离驱动芯片将系统功率部分与控制部分隔离,提高系统的可靠性与抗干扰性。分析了电路的基本结构及其工作原理,并介绍了电路的设计过程,最后给出了实验结果。展开更多
文摘This paper presents improvement tests based in a feedback-current controller designed to Tracking Maximum Power Point in photovoltaic system (MPPT-PV). Previously, a version was developed exhibiting results satisfactory in simulation and through of a low cost prototype. Now, using a sophisticated physical model of solar cell available in PSIM program is shown other cases, considering variations both irradiation and temperature to evaluate successfully the controller. The results show that its system is suitable under dynamical changing atmospheric conditions operating with effectiveness acceptable.
