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基于分形方法的电流误差空间矢量滞环控制器在多电平前端变换器中的简化与广义扇区检测

Fractal Approach Based Simplified and Generalized Sector Detection in Current Error Space Phasor Based Hysteresis Controller Applied to Multilevel Front-End Converters

语言:

中文摘要

本文针对多电平前端变换器中基于电流误差空间矢量(CESP)的滞环控制器,提出了一种简化的广义扇区检测方法。通过分形方法优化了内外滞环带的矢量选择与扇区检测逻辑,有效减少了CESP因频繁触碰外环边界导致的电流畸变,提升了多电平变换器的动态响应与稳态性能。

English Abstract

The current error space phasor (CESP) based hysteresis controller employed for front-end converter requires two (inner and outer) hysteresis bands for vector selection and sector detection, respectively. As a result of this, the CESP moves out of the fixed (hexagonal) inner boundary many times in one fundamental cycle (and touches outer hysteresis band) to detect appropriate sector. This distorts ...
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SunView 深度解读

该研究针对多电平变换器的核心控制算法进行了优化,对阳光电源的集中式光伏逆变器及大型储能变流器(如PowerTitan系列)具有重要参考价值。多电平拓扑是阳光电源实现高功率密度和高效率的关键技术,通过引入分形扇区检测方法,可以进一步降低逆变器输出电流谐波,提升在弱电网环境下的并网稳定性。建议研发团队评估该算法在三电平或多电平NPC/ANPC拓扑中的应用潜力,以优化控制器的动态性能,减少开关损耗,从而提升产品在复杂电网环境下的电能质量表现。