直接功率和转矩一体化控制的能量回馈变频器  

Direct power and torque integration control for energy feedback converter

作　　者：张华强[1] 孟凡华[1] 梁志平[1] 

机构地区：[1]哈尔滨工业大学电气工程系,山东威海264209

出　　处：《电机与控制学报》2013年第10期19-26,共8页Electric Machines and Control

基　　金：科技部创新基金(11C26223702363);山东省中青年科学家奖励基金(BS2010NJ001);山东省科技发展计划基金(2011GGH20411)

摘　　要：针对双PWM型能量回馈变频器基于开关表控制的磁链和转矩脉动大的问题,提出一种基于空间矢量调制的直接功率和转矩一体化控制方案。为满足网侧单位功率因数和负载侧转矩、磁链脉动小等要求,根据PWM整流器直接功率控制和PWM逆变器直接转矩控制的数学模型,提出整流器基于有功功率、无功功率的双闭环PI控制方案和逆变器基于转矩、磁链的双闭环PI控制方案。通过引入功率前馈环节,实现PWM整流与逆变的一体化控制。仿真和实验结果表明:系统动态响应快、抗干扰能力强;在直流母线电容容量减小的情况下,系统输入输出功率匹配仍然良好,验证一体化控制策略的正确性和有效性。Aiming at the problem of high flux and torque ripples appeared for the dual-PWM energy feedback converter control with switching table, a direct power and torque integration control scheme with space vector modulation is presented. To fulfill the requirement of unit power factor in grid side and lower torque and flux ripples in load side, according to the mathematics model of direct power control for PWM rectifier and direct torque control for PWM inverter, the double close-loop active and reactive power PI control algorithm was proposed, as well as the double close-loop torque and flux PI control algorithm. The integration control of PWM rectifier and inverter was accomplished by an additional power feed-forward loop. Simulation and experiment results show that the rapid dynamic response and anti-interference ability are improved, and its input and output power match well though the capability of the DC-link capacitor is decreased. It shows the correctness and validity of the integration control scheme.

关 键 词：能量回馈变频器 直接功率和转矩控制 功率前馈 一体化控制 

分 类 号：TM343[电气工程—电机]