改进型电压型PWM整流器预测直接功率控制  

Improved Predictive Direct Power Control of Three Phase PWM Rectifier

作　　者：宋文斌[1] 王辉[1] 张潇[1] 张明丽[1] 屈乐宏 

机构地区：[1]湖南大学电气与信息工程学院,长沙410086 [2]山河智能装备股份有限公司,长沙410086

出　　处：《控制工程》2016年第2期227-232,共6页Control Engineering of China

基　　金：国家国际科技合作项目(2011DFA62240)

摘　　要：提出一种改进的直接功率控制方法,该方法使用模型预测控制、空间矢量调控,方法具有良好的功率动态响应能力,并且功率响应准确无稳态误差,有功功率、无功功率的控制环中没有任何迟滞环节和PI控制,避免了这两种控制的不足。数学模型较一种最新的三相整流桥预测直接功率控制方法(P-DPC)更为精确,且功率和电流较大而开关频率不高情况下同样适用。普通的预测直接功率控制方法,参数依赖不精确的数学模型,电感等参数的变化可能会导致电路的不稳定、较高的谐波含量、功率损耗。通过一种更为精准的数学模型,使得2个连续周期中电压估值进一步精确,仿真的效果更为良好。在瞬态变化以及稳定状态下的仿真结果显示了这种改进型预测性直接功率控制方式可行性,精准性。This paper introduce a predictive direct power control （P-DPC） method for three-phase power rectifiers, the method which use model predict control（MPC） and space vector modulation（SVM） have excellent power dynamic ability and accurate power response, no steady-state error. Hysteresis comparators and PI controller are not used in control loop, thus the disadvantages in these controllers are avoided. Compared to the recent introduced P-DPC method, it is improved by using a more accurate mathematical model. It can be used when power and current is large while switching frequency is insufficient. In general, P-DPC is a parameter dependent approach and inaccuracies in mathematical model, variation of the inductor may result in unstable circuit conditions, high THD values, and power loss. In this paper a more accurate mathematical model is presented to accurate the voltage value between two successive periods. Detailed simulation results are presented for the proposed predictive direct power control approach to show its viability, speed and accuracy under steady-state and transient operating conditions.

关 键 词：直接功率控制 三相整流器 预测 数学模型 

分 类 号：TM46[电气工程—电器]