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Simple four-quadrant grid-tie control scheme with unity power factor rectifier mode for single-phase DC/AC converters

机译:具有单功率因数整流器模式的简单四象限并网控制方案,用于单相DC / AC转换器

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摘要

This study proposes a voltage-oriented control scheme for four-quadrant grid-tie of a single-phase bidirectional direct current/alternating current (AC) voltage-sourced converter (VSC) to operate smartly at modes of unity power factor (PF) rectifier (UPFR), inverter or static var compensator. Given the possible harmonic-distorted AC grid voltage, the proposed scheme follows or filters the grid voltage to generate the appropriate current command template for minimising the harmonic current while synchronising with the grid. The following template is for the UPFR mode, whereas the filtered template is for the other modes. The scheme proposes a unique band-pass filter (BPF) to proceed with direct component generation for the filtered template. The proposed scheme further unifies the grid-tie inductor current-to-voltage conversion for the following emplate and the quadrature component generation for the filtered template into a differentiator. The control laws under the filtered and following templates are derived. The BPF and differentiator designs are introduced. Simulations and experiments are conducted with a one-cycle control full-bridge VSC to verify the proposed grid-tie control scheme and evaluate its performance.
机译:这项研究提出了一种面向电压的控制方案,该方案针对单相双向直流/交流(AC)电压源转换器(VSC)的四象限并网,以在单位功率因数(PF)整流器模式下智能运行(UPFR),逆变器或静态无功补偿器。给定可能的谐波失真的交流电网电压,提出的方案遵循或过滤电网电压以生成适当的电流命令模板,以在与电网同步的同时使谐波电流最小化。以下模板用于UPFR模式,而过滤后的模板用于其他模式。该方案提出了一个独特的带通滤波器(BPF),以继续为滤波后的模板生成直接分量。所提出的方案进一步统一了用于随后的模板的并网电感器电流-电压转换,以及将滤波后的模板的正交分量生成微分器。导出过滤后的模板下的控制律。介绍了BPF和微分器设计。通过单周期控制全桥VSC进行仿真和实验,以验证提出的并网控制方案并评估其性能。

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