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首页> 外文会议>Workshop on Power Electronics and Power Quality Applications >Analysis and non-linear control of SEPIC dc-dc converter in photovoltaic systems
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Analysis and non-linear control of SEPIC dc-dc converter in photovoltaic systems

机译：光伏系统中SEPIC DC-DC转换器的分析和非线性控制

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SEPIC dc-dc converter has multiple applications as a power conditioning system because it has a non-pulsating input current and its voltage ratio is both step-down and step-up. However, due to the non-linear characteristics of a SEPIC converter, a non-linear control is more suitable to attain better performance in voltage regulation. We designed a Sliding-Mode control and a passivity-based control for controlling both the output voltage of the SEPIC converter and the input voltage to reach the maximum power of a photovoltaic module. This paper presents the stability analysis and the design of the two non-linear controllers. The simulation results show a good performance of both controllers with fast transient responses and zero steady errors. However, the Sliding-Mode control shows less inductor current than the Passivity-Based control. These results confirm the good performance of non-linear control for a SEPIC converter in photovoltaic systems; we expect experimental validations in future work.
机译：SEPIC dc-dc转换器具有无脉动输入电流，并且其电压比既降压又升压，因此具有多种应用作为功率调节系统。但是，由于SEPIC转换器的非线性特性，非线性控制更适合在电压调节中获得更好的性能。我们设计了滑模控制和基于无源性的控制，以控制SEPIC转换器的输出电压和输入电压，以达到光伏模块的最大功率。本文介绍了两个非线性控制器的稳定性分析和设计。仿真结果表明两个控制器都具有良好的性能，具有快速的瞬态响应和零稳态误差。但是，与基于无源的控制相比，滑模控制显示的电感电流要小。这些结果证实了光伏系统中SEPIC转换器的非线性控制具有良好的性能。我们期望在未来的工作中进行实验验证。

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