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An improved constant on/off time control scheme for photovoltaic DC/DC MIC

机译:光伏DC / DC MIC的改进恒定开/关时间控制方案

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In the medium and large PV power generation systems, a popular commercialized module integrated converter (MIC), comprised of H-bridge Buck-Boost topology with a pass through switch, would increase the MPPT efficiency when irradiation mismatch occurs. This paper proposes a novel control structure that, in Boost-mode, it works with constant on time control, in Buck-mode, and it works with constant off time control. The scheme can achieve ultra-fast transient response to track the fast-changing input voltage reference from MPPT block. In constant on time control, an improved ramp compensation which is from input capacitor current would increase the efficiency compared with the popular inductor current ramp compensation. A digital and analog mixed technology would be taken in this paper to realize a low cost and high performance structure. The simulation and experiment have been taken to verify the good performance of this control scheme.
机译:在介质和大型光伏发电系统中,由通过开关的通过开关组成的受欢迎的商业化模块集成转换器(MIC),随着通过开关的通过开关而增加,当发生照射不匹配时会增加MPPT效率。 本文提出了一种新颖的控制结构,在升压模式下,它适用于DICK-MODE的恒定控制,并且它适用于恒定关闭时间控制。 该方案可以实现超快速的瞬态响应,以跟踪从MPPT块的快速改变的输入电压参考。 在恒定的时间控制中,与输入电容器电流的改进的斜坡补偿与流行电感电流斜坡补偿相比增加了效率。 本文将采用数字和模拟混合技术,以实现低成本和高性能结构。 已经采取了仿真和实验来验证该控制方案的良好性能。

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