不平衡电网下Vienna整流器无网压传感器预测功率控制  

Predictive Power Control of Vienna Rectifier without Grid Voltage Sensors in Unbalanced Grid

作　　者：肖蕙蕙[1] 胡前云 郭强[1] 向文凯 何黎鹏 徐文希 XIAO Huihui;HU Qianyun;GUO Qiang;XIANG Wenkai;HE Lipeng;XU Wenxi(Chongqing Energy Internet Engineering Technology Research Center,Chongqing University of Technology,Chongqing 400054)

机构地区：[1]重庆理工大学重庆市能源互联网工程技术研究中心,重庆400054

出　　处：《电气工程学报》2025年第1期131-139,共9页Journal of Electrical Engineering

基　　金：重庆市基础研究与前言探索专项(重庆市自然科学基金)一般资助项目(CSTB2022NSCQ-MSX0997)。

摘　　要：Vienna整流器控制系统需要传感器采集电网电压和电流信息,而传感器的使用会增加系统体积和成本,且降低系统可靠性。针对虚拟磁链无网压传感器算法无法适应电网电压不平衡的情况,提出一种适用于电网电压平衡/不平衡情况下无网压传感器控制策略。首先,采用四阶正交信号发生器构造电网电压观测器,实现网侧电压估算的同时省去电流微分运算环节,具有较好的谐波抑制能力,并将电压观测器与预测功率控制相结合。此外,当电网电压不平衡时,传统预测功率控制会引起网侧电流畸变严重的问题,为了改善Vienna整流器网侧电流质量,通过引入扩展无功功率,应用于预测功率控制,使得有功功率恒定和网侧电流正弦度良好,实现Vienna整流器在电网电压平衡/不平衡情况下正常运行。最后,通过仿真验证了所提控制策略的正确性和有效性。Vienna rectifier control systems require sensors to collect grid voltage and current information and the use of sensors increases system size and cost,and reduces system reliability.Aiming at the fact that the grid-free voltage sensor algorithm based on virtual flux cannot adapt to the grid voltage imbalance,a grid-free voltage sensor control strategy suitable for grid voltage balancing/unbalance is proposed.Firstly,the fourth-order quadrature signal generator is used to construct the grid voltage observer,which realizes the grid-side voltage estimation while eliminating the current differential calculation link,has good harmonic suppression ability,and combines the voltage observer with predictive power control.In addition,when the grid voltage is unbalanced,the traditional predictive power control causes serious grid-side current distortion,in order to improve the grid-side current quality of Vienna rectifier,the extended reactive power is applied to the predictive power control by introducing extended reactive power,so that the active power is constant and the grid-side current sine is good,so as to realize the normal operation of the Vienna rectifier under the condition of grid voltage balance/imbalance.Finally,the correctness and effectiveness of the proposed control strategy are verified by simulation.

关 键 词：VIENNA整流器 电网电压不平衡 无网压传感器 预测功率控制 扩展无功功率 

分 类 号：TM461[电气工程—电器]