Grid Integration of a Dual Two-Level Voltage-Source Inverter Considering Grid Impedance and Phase-Locked Loop
Grid Integration of a Dual Two-Level Voltage-Source Inverter Considering Grid Impedance and Phase-Locked Loop
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DOI：
10.1109/jestpe.2019.2953522
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发表时间：
2021-02
影响因子：
5.5
通讯作者：
Amir Aghazadeh;M. Davari;H. Nafisi;F. Blaabjerg
中科院分区：
文献类型：
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作者：
Amir Aghazadeh;M. Davari;H. Nafisi;F. Blaabjerg
本文提出了一种双两电平电压源逆变器（DTL VSI）及其控制，以有效地将两个直流电源集成到完全集成电力和能源系统（FIPES）的多馈入AC/DC（MIACDC）功率架构中。电流控制的方法也被综合，并提出了控制并网DTL VSI。为此，本文提供了数学分析比较的DTL电压源逆变器与传统的电流控制的并网两电平电压源逆变器（TL电压源逆变器）。两个系统的线性化状态空间模型的数学推导，用于分析这两个结构的动态。这些模型揭示了在网格集成中使用的建议DTL VSI的显着特点。为此，空间相量分析，并考虑了锁相环（PLL）和电网阻抗的动态。建议的并网DTL VSI（电流控制算法）不仅在弱电网（正常电网条件），但即使在故障排除后（故障电网条件）稳定的有功和无功功率动态与改进的瞬态性能相比，其传统的同行。因此，它增强了集成在FIPES的MIACDC电源架构中的各种实体的VSI的操作范围。本文提供了支持的仿真结果和实验生成的MATLAB和一个按比例缩小的测试台，分别。
This article proposes a dual two-level voltage-source inverter (DTL VSI) and its control to effectively integrate two dc sources into the multi-infeed ac/dc (MIACDC) power architecture of fully integrated power and energy systems (FIPESs). The current-controlled method is also synthesized and proposed to control the grid-connected DTL VSI. To this end, this article provides mathematical analyses comparing the DTL VSI with the conventional current-controlled grid-connected two-level VSIs (TL VSIs). The linearized state-space models of both systems are mathematically derived for analyzing the dynamics of both structures. These models reveal the salient feature of the proposed DTL VSIs used in grid integration. To this end, space-phasor analysis is employed, and the dynamics of the phase-locked loop (PLL) and the grid impedance are also considered. The proposed grid-connected DTL VSI (with the current-controlled algorithm) not only in weak grids (for normal grid conditions) but even after fault removal (for faulty grid conditions) stabilizes the active and reactive power dynamics with improved transient performance compared with that of its conventional counterpart. Therefore, it enhances the operation range of the VSIs integrating various entities in FIPES’ MIACDC power architecture. This article provides supportive simulation results and experiments generated by MATLAB and a scaled-down test rig, respectively.