改进型SPWM调制下的整流器参数设计与仿真研究  

Parameter Design and Simulation of Rectifier Under Improved SPWM Modulation

作　　者：胡春龙 HU Chunlong(College of Intelligent Manufacturing,Shaanxi Institute of Technology,Xi’an 710300,China)

机构地区：[1]陕西国防工业职业技术学院智能制造学院,陕西西安710300

出　　处：《测试技术学报》2023年第4期310-315,322,共7页Journal of Test and Measurement Technology

基　　金：陕西国防工业职业技术学院2023年度科研计划资助项目(Gfy23-34)。

摘　　要：针对整流器在电网谐波补偿上受主参数影响变化较大,且在调制过程中易产生高次谐波和非线性等问题,以三相电压型PWM整流器为研究对象,提出了一种按照抑制电流谐波要求设计交流电感和依据直流电压对跟随性、抗扰性要求设计直流电容的方法,并对整定后的电感、电容参数在影响补偿性能方面进行了讨论。在整流器的控制策略上提出了一种动态调节的改进型SPWM算法,在SPWM算法中针对调制度的变化量对采样到的信号进行变换,通过DSP实现脉冲的动态调制。在Matlab/Simulink中对系统进行了仿真研究,结果表明系统参数设计和调制方法稳定可靠,动静态性能良好。Aiming at the problems that the rectifier is greatly affected by the main parameters in the power grid harmonic compensation,and it is easy to produce high-order harmonics and nonlinearity in the modulation process,taking the three-phase voltage source PWM rectifier as the research object,a method of designing AC inductance according to the requirements of restraining current harmonics and DC capacitance according to the requirements of DC voltage on follow-up and immunity is proposed.The influence of capacitance parameters on compensation performance is discussed.In the control strategy of the rectifier,an improved SPWM algorithm with dynamic regulation is proposed.In the SPWM algorithm,the sampled signal is transformed according to the change in modulation system,and the dynamic modulation of pulse is realized by DSP.The system is simulated in Matlab/Simulink.The simulation results show that the system parameter design and modulation method are stable and reliable,and the dynamic and static performance is good.

关 键 词：PWM整流器 谐波补偿 主参数 SPWM算法 

分 类 号：TM461[电气工程—电器]