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Efficiency and Power Density Improvement of Grid-Connected Hybrid Renewable Energy Systems utilizing High Frequency-Based Power Converters

机译：利用高频功率变换器的并网混合可再生能源系统的效率和功率密度改善

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High efficiency of power converters placed between renewable energy sources and the utility grid is required to maximize the utilization of these sources. Power quality is another aspect that requires large passive elements (inductors, capacitors) to be placed between these sources and the grid. The main objective is to develop higher-level high frequency-based power converter system (HFPCS) that optimizes the use of hybrid renewable power injected into the power grid. The HFPCS provides high efficiency, reduced size of passive components, higher levels of power density realization, lower harmonic distortion, higher reliability, and lower cost.The dynamic modeling for each part in this system is developed, simulated and tested. The steady-state performance of the grid-connected hybrid power system with battery storage is analyzed. Various types of simulations were performed and a number of algorithms were developed and tested to verify the effectiveness of the power conversion topologies. A modified hysteresis-control strategy for the rectifier and the battery charging/discharging system was developed and implemented. A voltage oriented control (VOC) scheme was developed to control the energy injected into the grid. The developed HFPCS was compared experimentally with other currently available power converters. The developed HFPCS was employed inside a microgrid system infrastructure, connecting it to the power grid to verify its power transfer capabilities and grid connectivity. Grid connectivity tests verified these power transfer capabilities of the developed converter in addition to its ability of serving the load in a shared manner.In order to investigate the performance of the developed system, an experimental setup for the HF-based hybrid generation system was constructed. We designed a board containing a digital signal processor chip on which the developed control system was embedded. The board was fabricated and experimentally tested. The system’s high precision requirements were verified. Each component of the system was built and tested separately, and then the whole system was connected and tested. The simulation and experimental results confirm the effectiveness of the developed converter system for grid-connected hybrid renewable energy systems as well as for hybrid electric vehicles and other industrial applications.
机译：为了最大程度地利用这些能源，需要在可再生能源和公用电网之间安装高效的电源转换器。电能质量是另一方面，需要在这些电源和电网之间放置大型无源元件（电感器，电容器）。主要目标是开发更高级别的基于高频的功率转换器系统（HFPCS），该系统可优化注入电网的混合可再生能源的使用。 HFPCS可提供高效率，减小无源元件的尺寸，实现更高水平的功率密度，降低谐波失真，提高可靠性和降低成本。对该系统中每个零件的动态建模进行了开发，仿真和测试。分析了带有电池存储的并网混合动力系统的稳态性能。进行了各种类型的仿真，并开发并测试了许多算法，以验证功率转换拓扑的有效性。开发并实施了针对整流器和电池充电/放电系统的改进的磁滞控制策略。开发了面向电压的控制（VOC）方案来控制注入电网的能量。将开发的HFPCS与其他当前可用的功率转换器进行了实验比较。所开发的HFPCS被用于微电网系统基础设施中，并将其连接至电网以验证其输电能力和电网连通性。电网连通性测试验证了已开发转换器的这些功率传输能力以及其以共享方式为负载提供服务的能力。为了研究已开发系统的性能，构建了基于HF的混合发电系统的实验装置。我们设计了一块包含数字信号处理器芯片的板，在该板上嵌入了开发的控制系统。该板是经过制造和实验测试的。该系统的高精度要求已得到验证。系统的每个组件都是分别构建和测试的，然后连接和测试整个系统。仿真和实验结果证实了开发的变流器系统对于并网混合可再生能源系统以及混合动力电动汽车和其他工业应用的有效性。

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    Amin Mahmoud;

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  • 年度 2012
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