单相整流器二次纹波抑制的有源功率解耦控制算法  

Active power decoupling control algorithm for second-order ripple suppression of single-phase rectifier

作　　者：成庶[1] 李卓鑫 周瑞睿 范子寅 向超群[1] CHENG Shu;LI Zhuoxin;ZHOU Ruirui;FAN Ziyin;XIANG Chaoqun(School of Traffic and Transportation Engineering,Central South University,Changsha 410075,China)

机构地区：[1]中南大学交通运输工程学院,湖南长沙410075

出　　处：《电机与控制学报》2024年第8期94-103,共10页Electric Machines and Control

基　　金：中国国家铁路集团有限公司科技研究开发计划(P2023J004)。

摘　　要：为了解决单相整流器中LC谐振回路频率适应性差的问题,引入有源功率解耦电路代替LC谐振回路抑制母线电压二次纹波,选择直流母线电容分裂拓扑有利于减小支撑电容容值。首先,对有源功率解耦电路的工作模态进行分析,建立了单相整流器和分裂电容有源功率解耦回路数学模型。其次,传统解耦控制算法间接计算解耦参考电压,为提高功率解耦效果,采用二阶广义积分器直接提取电压纹波作为电压参考,并提出一种基于滑模观测器的无电流传感器控制策略,滑模观测器降低了解耦电路成本,提高了抗干扰能力。然后,根据整流器性能指标和功率解耦要求,给出了有源功率解耦回路电感和电容设计依据。最后,对不同拓扑结构的单相整流器进行了稳态和动态实验对比,实验结果证明了控制算法的有效性。Aiming at the poor frequency adaptability of LC resonant circuits in single-phase rectifier,an active power decoupling circuit was introduced to suppress DC-bus second-order ripple voltage.The DCsplit capacitor power decoupling(DCPD)topology is capable to reduce the DC-bus capacitance.Firstly,the operation modes of DCPD were analyzed,and the mathematical model of single-phase rectifier and DCPD were established.Next,the traditional decoupling control algorithms indirectly calculate the decoupling reference voltage.To improve the performance of power decoupling,a second order generalized integrator(SOGI)was used to directly extract voltage ripple as the voltage reference,and a current-sensorless control strategy based on sliding mode observer(SMO)was proposed.This observer reduces the cost and improves anti-interference ability of DCPD.Then,based on the performance indicators of the rectifier and power decoupling requirements,the design basis for the inductance and capacitance of DCPD was provided.Finally,steady-state and dynamic experiments were compared on single-phase rectifiers with different topology,and the experimental results proved effectiveness of the control algorithm.

关 键 词：二次纹波电压 有源功率解耦 二阶广义积分器 滑模观测器 解耦参数设计 

分 类 号：TM465[电气工程—电器]