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首页> 外文会议>IEEE International Symposium on Circuits and Systems >Prediction of Subharmonic Oscillation in a PV-fed Quadratic Boost Converter with Nonlinear Inductors
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Prediction of Subharmonic Oscillation in a PV-fed Quadratic Boost Converter with Nonlinear Inductors

机译：具有非线性电感器的PV馈电二次升压转换器中郊发声振荡的预测

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摘要

In this paper, analytical and numerical tools are combined to explore the dynamics of a quadratic boost converter supplied with a PV source and interlinked to a grid-tied dc-ac inverter with the aim to determine its subharmonic instability boundary in terms of different system parameters. First, numerical simulations from the detailed switched model of the system shows that it can exhibit subharmonic instability at relatively high irradiance levels. A simplified dynamical model is derived mathematically by taking into account the power stage, the controller, the PV generator working at the maximum power point. Using the simplified model of the system and a closed-form expression for predicting subharmonic oscillations, the stability boundaries are located in terms of weather conditions as well as circuit parameters, hence, obtaining the system safe operation domain. The dependence of the inductance values on the operating current, determined from a linear regression analysis and a least square algorithm applied to experimental data, is also taken into account in the analysis.
机译：在本文中，组合分析和数值工具以探索具有PV源提供的二次升压转换器的动态，并与网格连接的DC-AC逆变器相互连接，目的是在不同的系统参数方面确定其子发出不稳定边界。首先，系统的详细交换模型的数值模拟表明它可以在相对高的辐照度水平下表现出次谐波不稳定性。通过考虑到在最大功率点的功率级，控制器，PV发电机，通过考虑到简化的动态模型。使用系统的简化模型和用于预测子谐波振荡的闭合形式表达式，稳定边界在天气条件以及电路参数方面，因此，获得系统安全操作域。在分析中还考虑了从线性回归分析和应用于实验数据的最小二乘算法的操作电流对工作电流的依赖性。

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