摘要
三相可控整流并联电路中由于控制与器件不能实时响应、零序开关占空比不同步和器件参数不相同等将导致环流的产生。采用一种统一电压调节器控制方法,即将各并联模块的外环电压调节器独立出来,形成统一电压调节器,通过对并联系统闭环电流的控制实现三相可控整流器的并联均流。对三相PWM整流并联系统进行了小信号建模,分析了其环流产生的原因,通过仿真验证了环流为0.12 mA,输出直流电压纹波电压为输出电压的0.2%;同时负载突变时,0.03s内电压值就恢复到给定值,其输出直流电压的变化量为2.8%,有较好的稳定性。
In three phase controlled rectifier parallel system, there are several reasons will lead to the generation of circulation, such as control and device can not be real-time response, zero sequence switching duty cycle and device parameters are not the same.This paper puts forward a kind of control method, which using unified voltage regulator, it is to say that outer ring of the parallel modules voltage regulator has been separated, to form a unified common voltage regulator, through the closed loop current control module in the parallel implementation of the three-phase controlled rectifier current, suppress the circulation. This paper sets up a small signal model in three-phase PWM rectifier system in parallel, analyzes the reasons of three-phase PWM rectifier parallel circulation system, the simulation results show that circulating current of the parallel system has been effectively suppressed, is 0.12 mA, output DC voltage ripple amplitude value decreases, the ripple voltage for 0.2% of the output voltage, the load mutation is that this kind of control method of parallel circuit can be within 0.08s fast recovery to the output voltage, and load mutation after2.8% of DC voltage overshoot, it has good stability.
出处
《电子技术应用》
北大核心
2017年第4期157-160,164,共5页
Application of Electronic Technique
基金
西华大学学生创新创业项目(苗子工程)2015RZ0030
西华大学研究生创新基金研究项目(ycjj2016062)
四川省高校重点实验室项目(TYN2015-09/2013TYNZ-02)
攀枝花市科技计划项目(2014CY-S-1-2
2015 CY-C-5)
攀枝花学院项目(2014YB11)
四川省电力电子节能技术与装备重点实验室项目(szjj2015-066)
流体及动力机械教育部重点实验室研究基金(西华大学)
关键词
三相可控整流器
并联
环流
电压调节
three-phase rectifier
parallel connection
flow equalize
unified voltage regulator
