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Single-stage converters for PV lighting systems with MPPT and energy backup

机译：具有MPPT和能量备份的PV照明系统的单级转换器

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摘要

Single-stage converters (SSCs) are proposed for applications of photovoltaic powered lighting system (PPLS). The synchronous switch technique is employed to develop the SSCs which can fulfill maximum power point tracking (MPPT), battery charging, discharging, and lamp ballasting features. Several typical SSCs are discussed. One of the proposed SSCs, which is the integration of a buck-boost charger/discharger and a class-D series resonant parallel loaded inverter, is analyzed and designed into a PPLS. Both pulsewidth modulation (PWM) and variable-frequency controls are used to govern the system operation. The controller is implemented on a single-chip microprocessor. Simulated and experimental results of the proposed system for driving up to sixteen GE TBX 26 W fluorescent lamps are used to verify the theoretical prediction and feasibility. The proposed system has a simple configuration, as well as a zero voltage switching (ZVS) feature, and can achieve the same functions as those in conventional systems when abrupt insolation changes do not occur frequently. These result in the inherent merits of lower cost, more compact size and possibly achieving higher reliability over conventional systems.
机译：提出了单级转换器（SSC）用于光伏照明系统（PPLS）的应用。采用同步开关技术来开发SSC，这些SSC可以实现最大功率点跟踪（MPPT），电池充电，放电和灯镇流功能。讨论了几种典型的SSC。对提出的SSC之一进行了分析，并将其设计为PPLS，该SSC是降压-升压充电器/放电器和D类串联谐振并联负载逆变器的集成。脉宽调制（PWM）和变频控制均用于控制系统操作。该控制器在单片微处理器上实现。所提议的系统最多可驱动16个GE TBX 26 W荧光灯的仿真和实验结果用于验证理论预测和可行性。所提出的系统具有简单的配置以及零电压开关（ZVS）功能，并且当不经常发生突然的日照变化时，可以实现与常规系统相同的功能。这些导致固有的优点，即成本较低，尺寸更紧凑并且可能比常规系统具有更高的可靠性。

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