复杂电网扰动下三相Vienna整流器控制策略优化

Optimization of Control Strategy for Three-Phase Vienna Rectifier in Complex Power Grid Disturbances

三相Vienna整流器具有结构简单,可靠性的特点,在航空航天、汽车充电等领域得到了广泛的应用。为了提高Vienna整流器对于复杂电网环境下的适应性,通过对其工作原理的分析,建立了基于dq坐标系的数学模型,进而分析输入电压和负载扰动对控制器的影响。重点分析了输入电压波动对输入电流的影响,通过仿真分析明确了电压环控制参数和前馈解耦的电流环控制策略。根据分析,本文建立了在输入电压波动的条件下的Vienna整流器仿真模型,验证了控制策略的正确性和可靠性,并在样机上通过了测试。

Three-phase Vienna rectifiers are widely used in aerospace,automotive charging and other applications due to their simplicity and reliability.In order to improve the adaptability of Vienna rectifier to complex power grid environment,a mathematical model based on dq coordinate system was established by analyzing its working principle.Then the influence of input voltage and load disturbance on the controller is analyzed.The influence of input voltage fluctuation on input current is analyzed,and the voltage loop control parameters and current loop control strategy of feedforward decoupling are defined by simulation analysis.Based on the analysis,a simulation model of Vienna rectifier under the condition of input voltage fluctuation is established to verify the correctness and reliability of the control strategy,and it passes the test on a prototype.