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One cycle controlled grid-tied differential boost inverter

机译：一周期控制并网差分升压逆变器

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摘要

A differential boost inverter (DBI) consists of two bidirectional boost converters and has a differential sinusoidal output voltage. This output voltage is obtained because each bidirectional boost converters generates a dc-biased sinusoidal voltage. Owing to this characteristic, this inverter topology requires a controller that can track a dc-biased sinusoidal voltage as the control reference. One cycle control (OCC) is a non-linear control approach that can meet the requirements and be easily implemented in a simple circuit with constant switching frequency. The controller must be capable of achieving a unity power factor (PF) because the inverter is designed to deliver maximum active power to the grid. Therefore, the sinusoidal reference signal of the OCC is formed by the scaled grid voltage and its derivation. Given this reference signal, the inverter output voltage represents the grid voltage with a small variation phase and amplitude. Furthermore, this strategy will guarantee that the output current and the grid voltage are in phase. An experimental prototype of DBI is implemented to verify that the control approach can achieve PF close to unity such that the maximum active power can be delivered to the grid with minimum current total harmonic distortion.
机译：差分升压逆变器（DBI）由两个双向升压转换器组成，并具有差分正弦输出电压。之所以获得该输出电压，是因为每个双向升压转换器都会产生一个直流偏置的正弦电压。由于这种特性，这种逆变器拓扑需要一个控制器，该控制器可以跟踪直流偏置的正弦电压作为控制参考。单周期控制（OCC）是一种非线性控制方法，可以满足要求，并且可以在具有恒定开关频率的简单电路中轻松实现。控制器必须能够实现单位功率因数（PF），因为逆变器旨在向电网输送最大有功功率。因此，OCC的正弦参考信号由缩放的栅极电压及其推导形成。在给定该参考信号的情况下，逆变器输出电压表示电网电压，其相位和幅度变化很小。此外，该策略将确保输出电流和电网电压同相。实施了DBI的实验原型，以验证控制方法可以实现接近于1的PF，从而可以以最小的电流总谐波失真将最大有功功率传输到电网。

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