基于变换器输出电压快速计算的直接功率控制方法  

Direct Power Control Based on Output Voltage Computation Technique for AC/DC Converters

作　　者：杨兴武[1] 赵剑飞[1] 杨兴华[1] 姜建国[1] 

机构地区：[1]上海交通大学电气工程系,上海市闵行区200240

出　　处：《中国电机工程学报》2010年第36期59-64,共6页Proceedings of the CSEE

基　　金：国家重点基础研究发展计划项目(973计划)(2005CB221505)~~

摘　　要：提出一种变换器输出电压计算方法用于实现直接功率控制的定频控制。利用变换器的模型可推导出输出电压的估计方法,即通过交流电抗的电感值、系统电压电流和系统有功、无功功率的误差值来实现输出电压的估计,然后可利用空间矢量调制方法使逆变器输出该期望电压。该方法只在静止坐标系下即可完成,控制方法简单,实现控制方式定频的同时,省略了锁相环。通过仿真和实验对所提出的定频直接功率控制方法进行详细分析,验证了所提方法具有快速动态性能的同时实现了控制系统无静差。This paper proposed a method for calculating the optimum output voltage of converter,and therefore realize the fixed-frequency control for the direct power control（DPC） method.Reactor parameters,voltage and current of the system, and the active and reactive power were also used to compute the estimated value of converter＇s output voltage.The space vector modulation was adopted for the converter.By the proposed method,both high transient dynamics and constant-switching frequency control can be obtained.As the calculation process was completed only in static coordinates, phase-locked loop（PLL） is not required,which simplifies the control scheme.The correctness and feasibility of the proposed control scheme was verified by the simulating and experimental tests.

关 键 词：AC/DC变换器 直接功率控制 定频控制 电能质量 

分 类 号：TM46[电气工程—电器]