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首页> 外文期刊>Electric Power Components and Systems >Analysis and Design of a Series-Parallel Uninterruptible Power Supply with an Improved Control Strategy for Seamless Transition
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Analysis and Design of a Series-Parallel Uninterruptible Power Supply with an Improved Control Strategy for Seamless Transition

机译：具有改进的无缝过渡控制策略的串并联不间断电源的分析与设计

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摘要

In this paper, a high-performance control structure is designed, implemented, and applied to a three-phase series-parallel uninterruptible power supply (UPS). This kind of UPS system provides input power factor correction, output voltage conditioning, and high efficiency. The control strategy proposed in this paper is based on voltage control of the parallel converter and current control of the series converter. It is shown that this strategy improves the system operation, specifically resulting in a smoother and more seamless transition between UPS operating modes. The controller in the proposed strategy is based on combination of two control methods with different characteristics and is therefore called a hybrid structure. To enhance the steady-state performance of the UPS and reach fast error convergence, a repetitive controller is used. In addition, to reach a fast transient response required for control of output voltage, a fast deadbeat is used. The stability of this hybrid controller is discussed, and the design procedure for a typical converter is given. For validation and verification of the theoretical analysis, both experimental and simulation results are shown.
机译：本文设计，实现了一种高性能控制结构，并将其应用于三相串并联不间断电源（UPS）。这种UPS系统提供输入功率因数校正，输出电压调节和高效率。本文提出的控制策略基于并联转换器的电压控制和串联转换器的电流控制。结果表明，该策略改善了系统运行，特别是在UPS运行模式之间实现了更顺畅，更无缝的过渡。所提出策略中的控制器基于具有不同特性的两种控制方法的组合，因此被称为混合结构。为了增强UPS的稳态性能并实现快速的误差收敛，使用了重复控制器。另外，为了达到控制输出电压所需的快速瞬态响应，使用了快速无差拍。讨论了这种混合控制器的稳定性，并给出了典型转换器的设计程序。为了验证和验证理论分析，显示了实验结果和模拟结果。

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