声明
摘要
Abstract
Table of Contents
List of Figured
List of Tables
1．1 Background and Motivation
1．2 Problem Description
1．3 Thesis Chapters layout
Chapter 2 Harmonic Analysis Theory
2．1 Basic of Harmonics
2．2 Indices Related to Harmonics
2．3 Direct Harm Caused by Harmonics
2．4 Harmonic Resonance phenomena
2．4．1 Parallel resonance
2．4．2 Series Resonance
2．5 Harmonic Analysis Methods
2．5．1 Frequency Scan Method
2．5．2 Harmonics Resonance Modal Analysis
2．6 Summary
Chapter 3 Harmonic component modeling and Harmonic Analysis in Wind Power plant
3．1 Importance of Resonance Analysis of a Wind Power Plant
3．1．1 Harmonic resonance in wind power plant
3．1．2 Sources of Harmonics in Offshore Wind Farms
3．2 Linear and Nonlinear Load in power system
3．2．1 Linear loads
3．2．2 Nonlinear loads
3．3 Modelling of elements
3．3．2 Cables
3．3．3 Aggregate Loads
3．3．4 VSC Grid-side Harmonic Emission Filters
3．4 Category of Wind Turbine Generators
3．4．1 Equivalent Circuit and Dynamic Mathematical Model of DFIG
3．4．2 DFIG’s Dynamic Mathematical Modeling
3．5 Harmonic Properties of LCC HVDC
3．5．1 Reactive power
3．5．2 Harmonic generation
3．5．3 Harmonic filters
3．6 Summary
Chapter 4 Simulations Results and Discussion
4．1 Inverter Output Impudence Modeling
4．2 Transmission System Selection
4．3 Deriving the Harmonic by Numerical Approach
4．4 Simulation Process
4．4．1 Parameter Setting of Wind Turbine
4．4．2 Circuit Simulation
4．4．3 Analysis of Harmonic Resonance
4．4．4 Effect of Harmonic Disturbances
4．5 Factors Affecting on Harmonics Distortion
4．6 Transformer PSCAD／EMTDC Simulation Modeling
4．7 Summary
Chapter 5 Approaches to resonance mitigations
5．1．1 Standard limits Design of C-type High-Pass Filter
5．1．2 Results Inquiry
5．1．3 Hybrid Filters
5．2 Proposed Control topologies
5．2．1 Dynamic scheme of current control
5．2．2 EPLL Control TopoloRy
5．3 Summary
6．1 Conclusion
References
