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首页> 外文会议>2016 IEEE International Conference on Power System Technology >A buck-boost converter based multi-input DC-DC/AC converter
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A buck-boost converter based multi-input DC-DC/AC converter

机译：基于降压-升压转换器的多输入DC-DC / AC转换器

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摘要

The buck-boost inverter can be easily used to construct a multi-input converter due to its inherent symmetrical and extendable differential structure. This paper proposed a multi-input converter derived from the buck-boost inverter to interface different input sources. When two pure DC voltages are chosen as the references for the two output capacitor voltages, the proposed converter will operate in DC-DC mode. When two dc-biased sinusoidal voltages with 180° phase shift are chosen as the references, the proposed converter will operate in DC-AC mode. Compared to the boost inverter based multi-input converters, an advantage is that the output voltages of the capacitors are not limited to be larger than the input voltages. A control strategy based on the average model of the circuit is proposed for the proposed converter. Single current control loops are designed for the buck-boost converters that used for interfacing the input sources and controlling the input power. Voltage-current double control loops are designed for the buck-boost converters that used for forming the buck-boost inverter and interfacing the energy storage system. The proposed control strategy can deal well with the varying operating points and the disturbances of the input voltage and load conditions. Simulation results are worked out to verify the effectiveness and validity of the proposed converter and its control strategy.
机译：降压-升压型逆变器由于其固有的对称且可扩展的差分结构，可轻松用于构建多输入转换器。本文提出了一种基于降压-升压型逆变器的多输入转换器，以连接不同的输入源。当选择两个纯直流电压作为两个输出电容器电压的参考时，建议的转换器将以DC-DC模式工作。当选择两个具有180°相移的直流偏置正弦电压作为参考时，建议的转换器将以DC-AC模式工作。与基于升压逆变器的多输入转换器相比，优点是电容器的输出电压不限于大于输入电压。提出了一种基于电路平均模型的控制策略。单电流控制环路是为降压-升压转换器设计的，该转换器用于连接输入源和控制输入功率。电压-电流双控制环路设计用于降压-升压转换器，该转换器用于形成降压-升压逆变器并连接能量存储系统。所提出的控制策略可以很好地应对变化的工作点以及输入电压和负载条件的干扰。仿真结果验证了所提出的变流器及其控制策略的有效性和有效性。

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