摘要
提出一种基于功率预测的三相电压型PWM整流器(VSR)直接功率控制。对三相VSR进行分析,建立两相静止坐标系下的数学模型,在瞬时功率理论的基础上建立功率的预测模型,以功率跟踪误差为目标函数来选择合适的交流电压矢量,针对功率跟踪存在的稳态偏差采取误差反馈校正以优化模型、提高精度,然后采用空间矢量调制实现恒定的开关频率,并通过估算电网电压实现无电压传感器,可以有效节省系统成本、提高系统鲁棒性。进行了详细的理论推导和仿真分析,其仿真结果验证了该方法的可行性和有效性。
This paper proposes a direct power control for three-phase voltage source PWM rectifier （VSR） based on power prediction. The three-phase VSR is analyzed and the mathematical model under the two-phase stationary coordinate system is established. Based on the instantaneous power theory, the power prediction model is established. The power tracking error is used as the objective function to select the appropriate AC voltage vector. The error feedback correction is used to optimize the model and improve the accuracy for the steady-state deviation of power tracking. And then, the space vector modulation is used to achieve a constant switching frequency, and no voltage sensor can achieved effectively by estimating the grid voltage to save system costs and improve system robustness. A detailed theoretical derivation and simulation analysis are given in this paper, the simulation results verify the feasibility and effectiveness of the proposed method.
出处
《电源学报》
CSCD
2017年第5期123-130,共8页
Journal of Power Supply
基金
国家自然科学基金资助项目(51477046)~~
关键词
三相VSR
瞬时功率理论
预测控制
空间矢量调制
three-phase VSR
instantaneous power theory
predictive control
space vector modulation
