双向AC/DC变换器的单相系统控制与建模

Single phase system control and modeling of bidirectional AC/DC converters

基于单相双向AC/DC变换器的状态空间平均模型及输出波形特点,提出一种适用于建立系统控制模型的"平均值分离法"和"半周期平均法",通过解析分析和线性化处理,推导出其有关交流侧电流幅度和直流侧输出电压的传递函数模型和离散化控制模型,并进行稳态理论分析,为系统设计提供依据。通过样机实验波形证实了所得控制模型及理论分析结果的正确性与可行性。

Both ＂method of average value separated＂ and ＂method of half cycle averaging＂ which are applicable to system control modeling of single phase bidirectional AC/DC converters are proposed in accordance with their state space averaging model and characteristic of output waveforms. Both transfer function model and discrete control model as concerns the AC-side current amplitude and the DC-side output voltage are derived from theoretical analysis and linearization processing. Also some steady state quantitative relations are derived out. All of these provide basis for system design. The validity of the control models and theoretical analyses is confirmed by sample equipment experiment results.