一种微网逆变器电压瞬态动态抑制控制策略

Rongliang Shi, Xing Zhang, Fang Liu, Haizhen Xu, Lei Tao
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引用次数: 8

摘要

中国机械工业标准(CMIS) GB/T 12326-2008规定,在孤岛运行模式下,当电阻性负载在0% ~ 100%之间快速切换时,微网逆变器(MGI)输出电压动态暂态范围小于10%。三环电力虚拟同步发电机(VSG)控制方法是MGI机组中常用的在并联MGI间分担负荷的控制方法。然而,当电阻性负载急剧阶跃时,MGI的瞬态输出电压超过CMIS。为了满足CMIS的要求,采用了输出电压差分反馈改进算法。与传统的控制方法相比,改进后的控制方法可以获得满意的动态暂态电压抑制和谐振抑制,提高了系统的稳定性。这些理论发现最终在模拟和实验室原型上得到了实验验证。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
A dynamic voltage transient suppression control strategy for microgrid inverter
China Machinery Industry Standard (CMIS) GB/T 12326-2008 prescribed in the islanded operation mode, microgrid inverter (MGI) output voltage dynamic transient range is less than 10% when the resistive load is switched rapidly between 0% and 100%. The three-loop power virtual synchronous generator (VSG) control methods are commonly used in MGI units to share the loads among the parallel MGIs. However, the transient output voltage of the MGI is beyond the CMIS when the resistive load steps sharply. In order to meet the CMIS, an output voltage differential feedback improved algorithm was employed. Comparing to the traditional control method, the improved method could obtain satisfying dynamic transient voltage suppression, resonance inhibition and improve system stability. These theoretical findings were eventually verified experimentally both on simulation and laboratory prototypes.
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