首页> 外文期刊>International journal of circuit theory and applications >Capacitor voltage balancing in cascaded H-bridge multilevel inverter and its modelling analysis for grid integrated wind energy conversion system application
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Capacitor voltage balancing in cascaded H-bridge multilevel inverter and its modelling analysis for grid integrated wind energy conversion system application

机译:级联H桥多晶逆变器中电容器电压平衡及其电网集成风能转换系统应用的建模分析

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摘要

In this study, a comprehensive control scheme for cascaded H-bridge multilevel inverter (CHBMLI)-based grid integrated bulk wind energy conversion system (WECS) addressing the problem of deviation of wind speeds among windmills like a partial shading condition of PV system is presented. The proposed control scheme uses independent dc links with reduced voltages that makes such a topology an ideal candidate for high and medium power WECS with improved reliability. Inconsistency of wind speeds at each turbine causes distinct voltage conditions among the isolated dc links of the CHBMLI H-bridge cells (HBC) leading to unstable power generation. The projected scheme along with maximum and efficient energy conversion has the ability of dc link capacitor voltage balancing in each HBC of CHBMLI during the above said power generation mismatch conditions and also maintains power quality in the grid side voltage and injected currents as per standards. Moreover, the modelling analysis of the adopted CHBMLI for the grid integrated WECS application has also been derived. The system performance under inconsistent wind speed environment has been tested and analysed by using MATLAB simulation and validated by using FPGA-based real-time simulator (Opal-RT-OP5700).
机译:在这项研究中,提出了一种级联的H-Bridge多级逆变器(CHBMLI)的综合控制方案,基本的网格集成散装风能转换系统(WECS),如PV系统的部分着色条件,如PV系统的部分遮阳条件所示。所提出的控制方案使用独立的直流链路,其具有降低的电压,该电压使得这种拓扑具有改善可靠性的高中功率WEC的理想候选者。每个涡轮机的风速不一致导致CHBMLI H桥电池(HBC)的隔离直流链路中的不同电压条件,导致不稳定的发电。预计方案以及最大高效的能量转换具有CHBMLI的每个HBC中的直流链路电容器电压平衡的能力,在上述发电不匹配条件下,并且在网格侧电压和按标准注入电流的电力质量。此外,还得到了用于网格集成WECS应用程序的采用CHBMLI的建模分析。通过使用MATLAB仿真进行了不一致的风速环境下的系统性能,并通过使用基于FPGA的实时模拟器(OPAL-RT-OP5700)进行验证。

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