三相电压型PWM整流器新型开关表直接功率控制  

New Switching Table Direct Power Control for Three-phase Voltage Source PWM Rectifier

作　　者：姚绪梁 马赫[1] 王景芳[1] 黄乘齐 张新月 YAO Xuliang;MA He;WANG Jingfang;HUANG Shengqi;ZHANG Xinyue(College of Intelligent Systems Science and Engineering,Harbin Engineering University,Harbin 150001,Heilongjiang Province,China)

机构地区：[1]哈尔滨工程大学智能科学与工程学院,黑龙江省哈尔滨市150001

出　　处：《中国电机工程学报》2023年第16期6407-6417,共11页Proceedings of the CSEE

摘　　要：该文以三相电压型脉宽调制(pulse width modulation,PWM)整流器为研究对象,提出一种基于新型开关表的直接功率控制(direct power control,DPC)策略。首先,根据两相旋转dq坐标系下整流器数学模型计算开关矢量对有功功率和无功功率的控制幅度,并归一化处理进行定量分析,以此为基础将传统DPC的12扇区重新划分为24扇区。然后,设计有功功率差值区间判断器,根据其输出值Cp和有功功率与无功功率滞环比较器的输出值Sp、Sq,选择当前扇区最佳开关矢量构造新型开关表,实现对有功功率的精确控制。仿真对比表明,该新型开关表不仅克服传统开关表对无功功率控制能力差的缺点,而且改善网侧电流总谐波失真,降低输出直流电压波动和有功功率与无功功率脉动。最后,搭建一台800W三相电压型PWM整流器样机,通过对比实验验证所提控制策略的正确性和有效性。Taking the three-phase voltage source pulse width modulation(PWM)rectifier as the research target,a direct power control(DPC)strategy based on new switching table is proposed in this paper.Firstly,according to the mathematical model of rectifier in two-phase rotating dq coordinate,the control amplitude of switching vector to active power and reactive power is calculated,and normalized value is utilized for quantitative analysis.Based on this,the 12 sectors of traditional DPC are subdivided into 24 sectors.Then an active power differential interval judge is designed to construct a new switching table to achieve accurately control of active power,in which the optimal switching vector in current sector can be selected according to output value Cp of designed judge,the output value Sp,Sq of active power and reactive power hysteresis comparator.Simulation comparison indicates that the new switching table not only overcomes the shortcomings of the traditional switching table in terms of poor control of reactive power,but also improves the current total harmonic distortion(THD)on grid side and reduces the output DC voltage fluctuation and active and reactive power ripple.Finally,an 800W three-phase voltage PWM rectifier prototype is built to verify the correctness and effectiveness of the proposed control strategy through comparison experiments.

关 键 词：三相脉宽调制整流器 新型开关表 区间判断器 控制幅度 24扇区 

分 类 号：TM46[电气工程—电器]