三相电流型整流器及其控制策略的研究  

Study on three-phase current rectifier and its control strategy

作　　者：林玉婷 陈雨枫 曹太强 朱修敏 Lin Yuting;Chen Yufeng;Cao Taiqiang;Zhu Xiumin(School of Electrical Engineering and Electronic Information,Xihua University,Chengdu 610039,China)

机构地区：[1]西华大学电气与电子信息学院,成都610039

出　　处：《电测与仪表》2018年第14期117-122,共6页Electrical Measurement & Instrumentation

基　　金：西华大学研究生创新基金(ycjj2017056);攀枝花市太阳能光伏离/并网智能化控制逆变一体集成应用(2014CY-S-1-2);攀枝花学院分布式光伏多逆变器并网控制研究(2014YB11);攀枝花市科技计划项目-光伏发电系统关键技术研制(2015 CY-C-5);四川省高校重点实验室-太阳能技术集成及应用推广(2013TYNZ-02/TYN2015-09);四川省电力电子节能技术与装备重点实验室(新型高效无桥高功率因数变换器的研究-szjj2015-066)

摘　　要：分析了用于蓄电池充电的电流型整流器(Current Source Rectifier,CSR)主电路拓扑结构,采用了三值逻辑空间矢量调制,建立了dq坐标系下三相CSR多环路直接电流控制的线性大信号数学模型。针对模型中d、q轴的耦合影响问题,采用了一种前馈解耦控制方法,消除了系统的非线性、耦合特性,从而简化了控制环路的设计。其次,针对LC滤波器的谐振问题,引入了一种基于电容电压反馈的有源阻尼控制策略,Bode图分析结果验证了控制策略的有效性。研究结果表明,三相CSR直流侧输出电流、交流侧输入电流均能保证快速动态响响应,网侧电压电流实现了单位功率因数,同时电流内环引入的前馈有源阻尼控制有效抑制了LC滤波器的谐振,使网侧电流的THD值由4.55%降到了2.17%。Aiming at topology of three-phase current source PWM rectifier which is used for battery charging,a tri-logic space vector modulation technology is adopt to establish a linear large signal mathematic model with three-phase CSR multi closed-loop direct current control method under dq coordinate system.For the coupling effect of d axis and q axis in model,a feed-forward decoupling control method is used to eliminate the non-linearity and coupling characteristic,thus the design control loop is simplified.In view of the resonance of LC filter,the passive damping control strategy is introduced,which is based on the series resistance of capacitor voltage feedback,and the analysis result of Bode plot verifies the effectiveness of the proposed control strategy.Finally,simulation and experimental results demonstrate that the DC side output current and AC side output current of three-phase CSR can guarantee the fast dynamic response,and voltage current of network side achieves the unity power factor.Meanwhile,the feed-forward active damping control introduced by current inner-loop effectively suppresses the resonance of LC filter,and the THD value of network side current is reduced from 4.55%to 2.17%.

关 键 词：电流型整流器 SVPWM 蓄电池 纹波 谐振 有源阻尼 

分 类 号：TM933[电气工程—电力电子与电力传动]