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Variable Frequency Control of a Photovoltaic Boost Converter System with Power Quality Indexes Based on Dynamic Phasors

机译：基于动态相量的具有电能质量指标的光伏升压变换器系统的变频控制

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Dynamic phasors modeling technique has demonstrated to be a good methodology for modeling oscillatory dynamic systems such as electric machines, power electronics and FACTS. Its main advantages are accuracy and fast simulation. However, something that has not been much exploited, is that Fourier coefficients can be used to compute the voltage module at some specific frequency for example, and with this extra information design new control algorithms to improve the behavior of the system. In this work, an extended model of a PV-boost converter system is developed, considering the main harmonics of the system that appear for a wide range of operation. Then, with this extra information contained in the harmonics, two new approaches are proposed: 1) Design of a variable frequency control of the boost converter to improve the quality of the output voltage under irradiation and load changes, and 2) Definition of power quality indexes for monitoring oscillatory behavior. Simulation results demonstrate the proposal effectiveness, establishing the mathematical basis and analyzing the dynamics of a 12.8 kWp photovoltaic system under different scenarios of operation.
机译：动态相量建模技术已被证明是一种用于对诸如电机，电力电子设备和FACTS之类的振荡动态系统进行建模的好方法。它的主要优势是准确性和快速仿真。然而，尚未得到充分利用的是傅立叶系数可用于计算某个特定频率下的电压模块，例如，利用这种额外的信息设计新的控制算法来改善系统的性能。在这项工作中，考虑到系统的主要谐波在广泛的运行范围内出现，开发了PV-boost转换器系统的扩展模型。然后，利用谐波中包含的这些额外信息，提出了两种新方法：1）设计升压转换器的变频控制以提高在辐照和负载变化下的输出电压质量，以及2）电能质量的定义监视振荡行为的索引。仿真结果证明了该方案的有效性，建立了数学基础并分析了12.8 kWp光伏系统在不同操作场景下的动态。

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