Boost变换器滑模控制系统的扰动分析与性能改进
发布时间：2022-02-10 20:20
作为一种应用广泛的升压型电力变换器,DC-DC Boost变换器的输出电压品质一直是制约其应用的关键问题。从电路本身而言,Boost变换器属于一类典型的非线性时变系统,且受到诸如电路寄生参数等扰动因素的影响;从控制器设计角度,尽管具有强鲁棒性的滑模控制技术已经得到普遍应用,但滑模控制固有的抖振问题却会诱发严重的谐波,进而严重制约其性能的提高。本文将从电路建模和控制两个角度研究影响Boost变换器输出电压品质的因素,这对本质和全面改善Boost变换器性能将有重要借鉴价值。研究Boost变换器电路寄生参数对其高频和低频性能的扰动影响。考虑功率开关管、电容和电感储能元器件、二极管正向压降和电阻等的寄生参数存在性,在电感电流连续工作模式下,建立Boost变换器的等效变换模型,推导出其传递函数,分析不同寄生参数对电路高频和低频性能的数学影响关系。计及建模过程中常忽略的传感器未建模动态,研究传感器稳定输出情况下的滑模控制Boost变换器的扰动性能影响。考虑传感器的静态和动态特性,选择其上升时间作为摄动因子建立传感器未建模动态的奇异摄动模型,给出保证其稳定输出下的约束条件,并在奇异摄动小时间尺度内证...
【文章来源】：哈尔滨工业大学黑龙江省211工程院校985工程院校
【文章页数】：72 页
【学位级别】：硕士
【文章目录】：
摘要
Abstract
Chapter1 Introduction
1.1 Research background and significance
1.2 Review of key studies
1.2.1 SMC applications in power converters
1.2.2 Modelling methods
1.2.3 Unmodeled dynamics on power converters
1.2.4 Parameter estimation of power converters
1.3 Main contents of research
Chapter2 Modelling and analysis of parasitic circuit parameters in Boost converters
2.1 Parasitic models of circuit components
2.2 Modeling of Boost converter
2.2.1 Averaged large signal model
2.2.2 Steady state model
2.2.3 Small signal model
2.3 Frequency influence of parasitic parameters
2.4 Simulations and experiments
2.4.1 Simulations
2.4.2 Experiments
2.5 Chapter summary
Chapter3 Influence of sensor unmodeled dynamics on SMC Boost converter
3.1 System modeling
3.1.1 Ideal boost converter
3.1.2 Sensor modelling
3.1.3 Linear sliding mode controller
3.2 Stability analysis
3.2.1 Guaranteed stability of the SMC
3.2.2 Restricted stability of sensor with unmodeled dynamics
3.2.3 Stability analysis of the closed-loop system
3.3 Quantitative analysis of output voltage harmonics
3.4 Simulation and experiments
3.4.1 Model identification of real sensor
3.4.2 Performance comparison of real system and ideal system
3.5 Chapter summary
Chapter4 Harmonics cancellation based on the multiphase sliding mode control of Boost converters
4.1 Basics of multiphase SMC
4.2 Multiphase SMC of Boost converters
4.3 Harmonics cancellation in multiphase SMC of Boost converter
4.3.1 Desgin of a2-phases SMC
4.3.2 Design of a4-phases SMC
4.4 Simulation Results
4.4.1 Simulation results for a2-phases Boost converter
4.4.2 Simulation results for a4-phases Boost converter
4.4.3 Comparison of results
4.5 Chapter summary
Chapter5 System state estimation of Boost converter using sliding mode observer
5.1 Basics of sliding mode observers for system state estimation
5.2 Sliding mode observer for Boost converter systems
5.2.1 Boost converter model
5.2.2 Current sliding mode controller
5.2.3 Sliding mode observer
5.3 Simulation and experiments
5.3.1 Simulation results
5.3.2 Experiment results
5.4 Chapter summary
Conclusion
References
Papers published in the period of Master education
Acknowledgement
【参考文献】：
期刊论文
[1]Buck型变换器自适应有限时间降压控制算法研究[J]. 杨晨,程盈盈,都海波,王金平,何怡刚. 自动化学报. 2016(02)
[2]多重化双向DC-DC变换器PI滑模变结构控制策略研究[J]. 陈明,汪光森,马伟明. 电力自动化设备. 2008(04)
本文编号：3619468
【文章来源】：哈尔滨工业大学黑龙江省211工程院校985工程院校
【文章页数】：72 页
【学位级别】：硕士
【文章目录】：
摘要
Abstract
Chapter1 Introduction
1.1 Research background and significance
1.2 Review of key studies
1.2.1 SMC applications in power converters
1.2.2 Modelling methods
1.2.3 Unmodeled dynamics on power converters
1.2.4 Parameter estimation of power converters
1.3 Main contents of research
Chapter2 Modelling and analysis of parasitic circuit parameters in Boost converters
2.1 Parasitic models of circuit components
2.2 Modeling of Boost converter
2.2.1 Averaged large signal model
2.2.2 Steady state model
2.2.3 Small signal model
2.3 Frequency influence of parasitic parameters
2.4 Simulations and experiments
2.4.1 Simulations
2.4.2 Experiments
2.5 Chapter summary
Chapter3 Influence of sensor unmodeled dynamics on SMC Boost converter
3.1 System modeling
3.1.1 Ideal boost converter
3.1.2 Sensor modelling
3.1.3 Linear sliding mode controller
3.2 Stability analysis
3.2.1 Guaranteed stability of the SMC
3.2.2 Restricted stability of sensor with unmodeled dynamics
3.2.3 Stability analysis of the closed-loop system
3.3 Quantitative analysis of output voltage harmonics
3.4 Simulation and experiments
3.4.1 Model identification of real sensor
3.4.2 Performance comparison of real system and ideal system
3.5 Chapter summary
Chapter4 Harmonics cancellation based on the multiphase sliding mode control of Boost converters
4.1 Basics of multiphase SMC
4.2 Multiphase SMC of Boost converters
4.3 Harmonics cancellation in multiphase SMC of Boost converter
4.3.1 Desgin of a2-phases SMC
4.3.2 Design of a4-phases SMC
4.4 Simulation Results
4.4.1 Simulation results for a2-phases Boost converter
4.4.2 Simulation results for a4-phases Boost converter
4.4.3 Comparison of results
4.5 Chapter summary
Chapter5 System state estimation of Boost converter using sliding mode observer
5.1 Basics of sliding mode observers for system state estimation
5.2 Sliding mode observer for Boost converter systems
5.2.1 Boost converter model
5.2.2 Current sliding mode controller
5.2.3 Sliding mode observer
5.3 Simulation and experiments
5.3.1 Simulation results
5.3.2 Experiment results
5.4 Chapter summary
Conclusion
References
Papers published in the period of Master education
Acknowledgement
【参考文献】：
期刊论文
[1]Buck型变换器自适应有限时间降压控制算法研究[J]. 杨晨,程盈盈,都海波,王金平,何怡刚. 自动化学报. 2016(02)
[2]多重化双向DC-DC变换器PI滑模变结构控制策略研究[J]. 陈明,汪光森,马伟明. 电力自动化设备. 2008(04)
本文编号：3619468
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