Application of non-linear microvaristor filled materials in high voltage devices and algorithmic optimization of high voltage simulations based on surrogate [...] / Hanyu Ye. 2015
Content
- Leere Seite
- Acknowledgment
- Symbols
- Index of Abbreviations
- Preface
- Properties of Microvaristors
- Introduction
- Historical Background
- Fundamental Characteristics of Varistors
- Characteristics of Microvaristors
- Summary
- FEM Simulations for Non-Linear Microvaristor-Filled Materials
- Introduction
- Electro-Quasistatic Approximation
- Simulation Process
- Creation of CAD Models
- Generation of Unstructured Meshes
- Computational Calculation using the FEM Method
- Evaluation of the Simulation Results
- Summary
- Investigation of Insulators with Microvaristor-Filled Silicone Rubber Components
- Introduction
- The Role of the Electric Field Strength for Electrical Discharges
- Metal Electrode Initiated Corona
- Water Droplet Initiated Corona
- Dry Band Arcing
- Flashover under Contaminated Conditions
- Application of Microvaristor-Filled Silicone Rubber
- Investigation of Applications of Microvaristor-filled Material Directly onto the Surface
- Homogenization of the Potential Distribution under the Dry Surface Condition
- Prevention of Water Corona Discharges
- Prevention of the Dry Band Arcing
- Experimental Results
- Investigation of Application of the Microvaristor Material under a Silicone Layer
- Simulated Insulators
- Reduction of the Electric Field Strength for Dry Conditions
- Prevention of Water Corona Discharges
- Effect of the Silicon Layer in the Presence of Dry Bands
- Influence of the Switching Point of the Microvaristor Layer
- Influence of the Thickness of the Silicone Layer
- Experimental Results
- Summary
- Investigation of compact Bushings with Microvaristor-Filled Epoxy Resin
- Introduction
- Electrical Properties of Microvaristor-Filled Epoxy Resin
- Setup of Measurement
- Influence of Different Microvaristor Contents
- Influence of Different Temperatures
- Computational Investigation
- The Simulated Bushing and Material Properties
- Choosing the Switching Point of the Microvaristor Composite
- Reduction of the Water Drop Corona on the Surface of Bushings
- Determination of the Necessary Length of the Microvaristor Layer
- Influence of the Thickness of the Microvaristor Layer
- Experimental Investigation
- Summary
- Optimization of HV Devices Using an Adaptive Kriging Method
- Introduction
- Mathematical Background of the Kriging Method
- Initial and Infill Sampling
- One-then-Two-Stage Algorithm
- DIRECT Optimization Method
- Analytical Results using One-then-Two Stage Kriging
- Optimization of the HV Corona Ring
- Summary
- Optimization of Large-Scale HV Devices Using the Co-Kriging Method
- Introduction
- Mathematical Background of the Co-Kriging Method
- Optimization Procedure
- Demonstation with a One-Variable Analytical Function
- Optimization of a Corona Ring
- Summary
- General Conclusion and Future Work
- Classification of EQS and MQS Approximations
- Literature