NPC三电平逆变器中点电压平衡的研究
发布时间：2021-09-24 07:48
在近几年以来,三电平NPC逆变器被认为是高功耗负载（例如不同电动汽车中的电动机等）的适当应用。三级逆变器属于多级逆变器拓扑,它与两级逆变器有很大的差异,可以认为是两级逆变器的扩展。由于与两级拓扑多电平逆变器相比,工作电压范围更大,因此可提供更好的输出特性。通常它们的输出信号更接近正弦波形。由于电压范围的变化,多电平逆变器存在电压不稳定问题。这是这类设备的主要问题。解决这些问题的一种方法是将其他部分集成到拓扑中,另一种方法是显着更改拓扑。第一种方法可能更容易接受,因为包含在拓扑中的零件数量较少。此调查由几个部分组成,因此可以区分几个部分组。第一部分包括:现有的三级逆变器拓扑,三级三相NPC逆变器的建议和数学模型,对现有三级逆变器控制策略的全面综述。第二个步骤包括:定义各种电路参数对三级NPC逆变器工作流程的影响。最后一组致力于中性点电压稳定和减少波动的硬件解决方案的分析。
【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】：64 页
【学位级别】：硕士
【文章目录】：
摘要
Abstract
Chapter1 Introduction
1.1 Source of the subject and background and significance of the study
1.2 Research background and significance
1.3 Analysis of literature review
1.3.1 Neutral point potential as main drawback of three-level NPC inverters
1.3.2 Comparison of main inverter topologies
1.3.3 Analysis of literature review
1.4 Content and methodology of the research
Chapter2 Mathematical modeling of three level voltage source inverter
2.1 Mathematical model
2.2 Mathematical modeling of space vector PWM controller for the 3 level VSI
2.2.1 Main principle of space vector PWM
2.2.2 Mathematical implementation of the SVPWM algorithm
2.2.3 Mathematical modeling output signal of the SVPWM controlled inverter under the balanced and the unbalanced load
2.3 Mathematical modeling of sinusoidal PWM controller for the3 level VSI
2.3.1 Main principle of sinusoidal PWM
2.3.2 Mathematical modeling output signal of the SPWM controlled inverter under the constant and the unbalanced load
2.4 Chapter conclusion
Chapter3 The influence of variable circuit parameters on the output signal waveform and neutral point voltage balance
3.1 The experiment conditions short description
3.2 The influence of the capacity of neutral point capacitors
3.3 The influence of the series resistance of neutral point capacitors
3.4 The influence of the parallel resistance of neutral point capacitors
3.4.1 Analysis of the experimental data
3.5 Chapter conclusion
Chapter4 Analysis hardware method of neutral point voltage stabilization efficiency
4.1 Midpoint potential balance hardware circuit workflow description
4.2 Algorithm description
4.3 Analysis of duty cycle length influence on midpoint potential balance hardware circuit capacitor voltage stabilization speed
4.4 The analysis of the PID controller influence midpoint potential balance hardware circuit capacitor voltage stabilization speed
4.5 The influence of the inductance to the voltage stabilization process
4.6 The analysis of the mathematical modelling results
Conclusion
References
Acknowledge
Appendix
本文编号：3407382
【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】：64 页
【学位级别】：硕士
【文章目录】：
摘要
Abstract
Chapter1 Introduction
1.1 Source of the subject and background and significance of the study
1.2 Research background and significance
1.3 Analysis of literature review
1.3.1 Neutral point potential as main drawback of three-level NPC inverters
1.3.2 Comparison of main inverter topologies
1.3.3 Analysis of literature review
1.4 Content and methodology of the research
Chapter2 Mathematical modeling of three level voltage source inverter
2.1 Mathematical model
2.2 Mathematical modeling of space vector PWM controller for the 3 level VSI
2.2.1 Main principle of space vector PWM
2.2.2 Mathematical implementation of the SVPWM algorithm
2.2.3 Mathematical modeling output signal of the SVPWM controlled inverter under the balanced and the unbalanced load
2.3 Mathematical modeling of sinusoidal PWM controller for the3 level VSI
2.3.1 Main principle of sinusoidal PWM
2.3.2 Mathematical modeling output signal of the SPWM controlled inverter under the constant and the unbalanced load
2.4 Chapter conclusion
Chapter3 The influence of variable circuit parameters on the output signal waveform and neutral point voltage balance
3.1 The experiment conditions short description
3.2 The influence of the capacity of neutral point capacitors
3.3 The influence of the series resistance of neutral point capacitors
3.4 The influence of the parallel resistance of neutral point capacitors
3.4.1 Analysis of the experimental data
3.5 Chapter conclusion
Chapter4 Analysis hardware method of neutral point voltage stabilization efficiency
4.1 Midpoint potential balance hardware circuit workflow description
4.2 Algorithm description
4.3 Analysis of duty cycle length influence on midpoint potential balance hardware circuit capacitor voltage stabilization speed
4.4 The analysis of the PID controller influence midpoint potential balance hardware circuit capacitor voltage stabilization speed
4.5 The influence of the inductance to the voltage stabilization process
4.6 The analysis of the mathematical modelling results
Conclusion
References
Acknowledge
Appendix
本文编号：3407382
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