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Z-Source inverter based powerconditioning systems for PV power generation.

机译：基于Z源逆变器的功率调节系统，用于光伏发电。

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摘要

The world's energy demand is increasing quickly. As photovoltaic system is one of the most promising alternative energy sources in DG. The power electronics converters based PCS in the PV system now becomes the key point in cost reduction.;The main tasks for inverter are draw the power out and injected a sinusoidal current to the grid. To competitive with other power sources, the most effective way is to develop inexpensive and reliable inverters. The aim of this thesis is therefore to develop new topologies and control strategies for PV system.;This thesis presented a new power conditioning system based on Z-Source inverter for renewable energy sources. The PV system performance depends not only on temperatures and irradiations, but also on maximum power tracking function of PV inverter. So it is important to verify the inverter system too. To help verifying the inverter system, a dc-dc converter based PV simulator was proposed and implemented. Also, both the stand-alone split-phase PV system and grid-connected three-phase PV system were proposed and analyzed. The simulation and experiment results were shown to verify the proposed system.;With unique X shape network, the Z-Source inverter can realize buck and boost function without additional dc-dc converter. For grid-connect action, the proposed harmonic injected unity power factor current control which also employed modified P&O MPPT method are suitable for PV power applications. By utilizing the Z-Source inverter, the volume, the cost, and the switching device count are minimized. Because of the single stage operation, the efficiency of the system can be greatly improved. The reliability can be enhanced greatly due to the shoot through states. With all these advanced features, the Z-Source inverter based PCS is very promising for renewable energy applications.
机译：世界能源需求正在迅速增加。由于光伏系统是DG中最有前途的替代能源之一。如今，光伏系统中基于PCS的电力电子转换器成为降低成本的关键。逆变器的主要任务是抽出功率并向电网注入正弦电流。为了与其他电源竞争，最有效的方法是开发廉价且可靠的逆变器。因此，本文的目的是为光伏系统开发新的拓扑结构和控制策略。本论文提出了一种基于Z源逆变器的可再生能源电力调节系统。光伏系统的性能不仅取决于温度和辐照，还取决于光伏逆变器的最大功率跟踪功能。因此，验证逆变器系统也很重要。为了帮助验证逆变器系统，提出并实现了基于DC-DC转换器的PV模拟器。同时，提出并分析了独立式分相光伏发电系统和并网三相光伏发电系统。仿真和实验结果证明了所提出的系统的有效性。通过独特的X形网络，Z源逆变器无需额外的DC-DC转换器即可实现降压和升压功能。对于并网动作，建议的谐波注入单位功率因数电流控制也采用改进的P＆O MPPT方法，适用于光伏发电应用。通过使用Z源逆变器，可以最大程度地减少体积，成本和开关设备数量。由于采用单级操作，因此可以大大提高系统效率。由于直通状态，可以大大提高可靠性。具有所有这些高级功能，基于Z源逆变器的PCS在可再生能源应用中非常有前途。

著录项

  • 作者

    Huang, Yi.;

  • 作者单位

    Michigan State University.;

  • 授予单位 Michigan State University.;
  • 学科 Engineering Electronics and Electrical.
  • 学位 Ph.D.
  • 年度 2009
  • 页码 181 p.
  • 总页数 181
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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