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Optimized one-cycle control in photovoltaic grid connected applications

机译：光伏并网应用中的优化单周期控制

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摘要

The use of one-cycle control (OCC) for maximum power point tracking (MPPT) and power factor correction (PFC) in grid connected photovoltaic (PV) applications is discussed. Circuit and operating parameters of the one cycle-based controller of a cost-effective single-stage inverter are optimized in order to obtain the best performances of the system under different irradiance levels. Firstly, design constraints are formulated which allow to get a very efficient OCC operation in terms of power extracted from the PV array, stability, and PFC. Afterwards, such constraints are used to perform the parametric optimization of the one cycle controller by means of suitable heuristic approaches. Various selection criteria of the best parameters set under different conditions are discussed and applied. Finally, a customized perturb and observe (P&O) control is applied to the optimized one cycle controlled single-stage inverter in order to perform a real MPPT in presence of varying irradiance conditions. Subjects described here are covered by the Italian Patent Application SA2005A000014-13.07.2005 and PCT Application PCT/IT2005/000747-20.12.2005
机译：讨论了单周期控制（OCC）在并网光伏（PV）应用中用于最大功率点跟踪（MPPT）和功率因数校正（PFC）的用途。优化具有成本效益的单级逆变器的基于周期的控制器的电路和工作参数，以便在不同的辐照度下获得最佳的系统性能。首先，制定了设计约束条件，这些约束条件允许从光伏阵列提取的功率，稳定性和PFC方面获得非常有效的OCC操作。然后，通过适当的启发式方法，将这些约束条件用于执行一个周期控制器的参数优化。讨论并应用了在不同条件下设置最佳参数的各种选择标准。最后，将定制的扰动和观测（P＆O）控制应用于优化的单周期控制的单级逆变器，以便在变化的辐照条件下执行实际的MPPT。在此描述的主题由意大利专利申请SA2005A000014-13.07.2005和PCT申请PCT / IT2005 / 000747-20.12.2005涵盖。

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