摘要
级联式变换器广泛应用于分布式发电系统中,为了保证各级变换器自身以及系统集成后变换器的动态和稳态特性,各级变换器的输入输出阻抗及控制环路的设计需要统一考虑。移相全桥DC-DC变换器作为Buck变换器的一种,广泛应用在高频、大功率场合,且相比较电压型控制方法,平均电流型控制可以使变换器获得更好的动态和稳态特性。本文以平均电流控制型移相全桥DC-DC变换器为例,揭示了该型变换器闭环输出阻抗与控制环路参数的相互关系,讨论了电流电压环路补偿网络的参数设计依据,在确保单级变换器本身的动态和稳态特性前提下,通过约束前级DC-DC变换器闭环输出阻抗尖峰,从而保证系统集成后稳定可靠工作。系统仿真与实验结果表明了理论分析的正确性。
The converters are widely used in distributed power generation systems. The input ＆ output impedance and control loop designs of all levels converter should be considered together for the dynamic and static characteristics both of converters and system integration. As one kind of the Buck mode converters, the phase-shift full bridge DC-DC converters are widely used in high frequency and high power field. Compared with voltage control mode, the average current control mode could make the converters get better dynamic and static characteristics. Based on average current control mode phase-shift full bridge DC-DC converter as an example, the relationship between the closed-loop output impedance and control loop parameters is revealed in the paper, the current and voltage loop compensation network parameters design rules also are discussed. In condition of the dynamic and static characteristics of the single stage converter, closed-loop output impedance rush of converter is also constraint to ensure stable and reliable work after system integration. System simulation and experimental results verified the theoretical analysis.
出处
《电工技术学报》
EI
CSCD
北大核心
2013年第4期43-49,共7页
Transactions of China Electrotechnical Society
