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三相优化无电压传感器并网预测技术研究
作者姓名:曹以龙  余小婵  江友华  吴卫民
作者单位:上海电力大学电子与信息工程学院;上海海事大学物流工程学院
基金项目:国家自然科学基金项目(51877130)。
摘    要:为提高三相并网逆变器的可靠性和进一步降低三相并网逆变器的成本,提出了一种三相并网逆变器无交流电压传感器的电压估计策略.应用基于二阶广义积分器的正交信号发生器(SOGI-QSG)构造改进型无电压传感器观测模型的控制新方法,并结合了一种改进型无差拍预测电流控制算法,增加预测k+2时刻的采样电流.实验结果表明,该策略有效地避...

关 键 词:LCL滤波器  无差拍预测控制  并网逆变器  电压观测器

Research on Three-Phase Optimized Non-Voltage Sensor Grid Connection Prediction Technology
Authors:CAO Yilong  YU Xiaochan  JIANG Youhu  WU Weimin
Affiliation:(School of Electronics and Information Engineering,Shanghai University of Electric Power,Shanghai 200120,China;School of Logistics Engineering,Shanghai Maritime University,Shanghai 200120,China)
Abstract:In order to improve the reliability of the threephase grid-connected inverter and further reduce its cost,a voltage estimation strategy for three-phase grid-connected inverter without AC voltage sensor is proposed in this paper. A new control method based on the quadrature signal generator(SOGI-QSG)of the second-order generalized integrator is used to construct an improved non-voltage sensor observation model.In addition,an improved dead-beat predictive current control algorithm is combined to increase the sampling current for predicting the k+2 moment. This strategy effectively avoids the integral saturation,initial value sensitivity,static errors and other problems in the traditional virtual flux observation scheme,and has better anti-disturbance performance. The experimental results have verified the effectiveness and feasibility of the proposed control strategy.
Keywords:LCL filter  dead-beat no predictive control  grid-connected inverter  voltage-free sensor
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