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用于并联三电平逆变器共模电压与环流同时抑制的空间矢量调制方法

Space Vector Modulation Method for Simultaneous Common Mode Voltage and Circulating Current Reduction in Parallel Three-Level Inverters

语言:

中文摘要

针对多台三电平T型逆变器并联运行于同一直流母线时产生的零序环流(ZSCC)及共模电压(CMV)问题,本文提出了一种改进的空间矢量调制策略。该方法在保证逆变器高效运行的同时,有效抑制了环流并降低了共模电压,提升了高功率电力电子系统的电磁兼容性与运行稳定性。

English Abstract

Parallel three-level inverters are widely used in high-power applications for increasing the power capacity of the system. However, when multiple three-level T-type inverters are connected to a single dc bus, the zero sequence circulating current (ZSCC) will be generated. For the operation of paralleled inverters, another requirement is to reduce the common mode voltage (CMV) associated with pulse...
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SunView 深度解读

该研究直接服务于阳光电源大功率组串式逆变器及集中式逆变器的并联应用场景。在大型地面电站中,多机并联是提升系统容量的主流方案,但环流和共模电压问题一直是影响系统效率与电磁兼容性的痛点。该调制算法可优化阳光电源现有三电平T型拓扑的控制逻辑,减少因环流导致的损耗,并降低对滤波器及绝缘系统的压力。建议研发团队将其集成至iSolarCloud智能运维平台的控制算法库中,以提升大功率并联系统的长期可靠性与电网适应性。