单相PWM整流器设计  

Design of single-phase PWM rectifier

作　　者：周桂煜[1] 张超 

机构地区：[1]浙江大学电气工程学院,浙江杭州310027 [2]卧龙电气集团杭州研究院有限公司,浙江杭州310051

出　　处：《电机与控制学报》2014年第8期49-54,共6页Electric Machines and Control

基　　金：国家863项目(2011AA11A101)

摘　　要：针对目前非线性化负载大量使用引起电网谐波和无功污染日益严重的问题,设计对电网污染很小的单相PWM整流器。通过建立和分析单相电压型PWM整流器的拓扑结构和数学模型,给出了该系统的电压、电流双闭环控制方法。该方法采用构造虚拟电流的方法进行电流内环的解耦控制,并通过分析系统的瞬时有功、无功功率流以实现电压外环的线性化控制。对系统进行基于Matlab/SIMULINK的仿真分析,并进行硬件设计,搭建整流器实验模型,以进行实验验证。仿真和实验结果验证了该电压、电流双闭环控制方法的可行性,同时表明单相PWM整流器具有网侧单位功率因素运行、网侧电流正弦化、直流输出电压纹波小等优点,对电网的谐波和无功污染很小。Serious current harmonics and reactive power pollution are caused in power grid by the wide use of nonlinear loads.A single-phase pulse width modulation（PWM） rectifier with little pollution to the power grid was designed.A control strategy with voltage and current dual-closed-loop was given by establishing the topology and mathematical model of the single-phase PWM rectifier.In the inner current loop control a method of constructing a virtual current was utilized to achieve decoupling control,and in the outer voltage loop control instantaneous active and reactive power theory was utilized to achieve the linearization control of voltage.Then,simulation was made using the software of Matlab/Simulink,while hardware system was designed and prototyped.Simulation and experimental results verify the feasibility of the voltage and current dual-closed-loop control method.And,the results also demonstrate that the singlephase PWM rectifier has advantages of unit power factor operation and sinusoidal current in the AC side,small ripple in the DC output voltage,etc.Thus,current harmonics and reactive power pollution to the power grid caused by single-phase rectifier are all very small.

关 键 词：单相PWM整流器 虚拟电流 解耦控制 瞬时有功、无功功率 双闭环控制 

分 类 号：TM461[电气工程—电器]