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首页> 外文会议>Control and Modeling for Power Electronics (COMPEL), 2012 IEEE 13th Workshop on >An adaptive, linear-line approximation method and its VLSI implementation for maximum power control of photovoltaic system
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An adaptive, linear-line approximation method and its VLSI implementation for maximum power control of photovoltaic system

机译：光伏系统最大功率控制的自适应线性近似方法及其VLSI实现

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摘要

Photovoltaic (PV) systems are renewable sources whose operating voltage and current are nonlinearly dependent on the temperature and sunlight intensity. Therefore, maximum power point (MPP) tracking is important for extracting as much power as possible from PV arrays. The Linear-line Approximation Method (LLAM) is able to converge to the MPP quickly regardless of the changes of sunlight intensity. However, the slope of the linear line method becomes non-optimal as the temperature changes, causing the PV systems to leave its MPP. This paper proposes a modified LLAM whose line slope can adapt automatically in response to temperature changes, maintaining an optimal MPP control. After verifying the feasibility and capability of the proposed algorithm by simulation, the proposed algorithm is further implemented as a microsystem in VLSI (Very Large Scale Integration). The application-specific VLSI is expected to achieve higher control efficiency and lower power consumption.
机译：光伏（PV）系统是可再生资源，其工作电压和电流非线性地取决于温度和阳光强度。因此，最大功率点（MPP）跟踪对于从PV阵列中提取尽可能多的功率非常重要。线性近似法（LLAM）能够迅速收敛到MPP，而与阳光强度的变化无关。但是，线性方法的斜率会随着温度的变化而变得不理想，从而导致PV系统离开其MPP。本文提出了一种改进的LLAM，其线性斜率可以响应温度变化而自动适应，并保持最佳的MPP控制。在通过仿真验证了所提算法的可行性和能力之后，将所提算法进一步实现为VLSI（超大规模集成）中的微系统。专用VLSI有望实现更高的控制效率和更低的功耗。

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