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
成庶 1李卓鑫 1周瑞睿 1范子寅 1向超群1
作者信息
- 1. 中南大学 交通运输工程学院,湖南 长沙410075
- 折叠
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.
Abstract
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 DC-split 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 de-coupling 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-sen-sorless 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 recti-fiers 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Key words
second-order ripple voltage/active power decoupling/second order generalized integrator/sliding mode observer/decoupling parameter design引用本文复制引用
基金项目
中国国家铁路集团有限公司科技研究开发计划(P2023J004)
出版年
2024
NETL
NSTL
万方数据