Intro
Foreword
Preface
Contents
Abbreviations
1: Introduction: Climate Policy Goals of Sustainable Energy Supply
1.1 Why Do We Need a General Energy System (GES)?
1.1.1 World Population, Energy Resources and the ``Full World ́́
1.1.2 Energy Consumption and CO2 Emissions: From Kyoto Protocol to Paris Agreement to Green Deal
1.1.3 Sector Coupling: What Is It?
1.1.3.1 Introduction
1.1.3.2 Example Germany
1.2 Paradigm Shift in Electrical Energy Supply Due to Regenerative Generation
1.2.1 Power, Energy and Efficiency
1.2.2 Potentials of Renewable Generation

1.2.3 Dunkelflaute and Other Special Features
1.2.3.1 General Comments
1.2.3.2 Dunkelflaute
1.2.3.3 Frequency Maintenance: System Inertia. Can the Electric Power System Remain Stable Without Inertia? [42]
1.2.3.4 Offshore Wind and Green Power from Africa
References
2: Methodology and Model Design for Sector Coupling in the General Energy System (GES)
2.1 Modelling of a GES
2.1.1 Energy Hub Model
2.1.2 Temporal Resolution of Energy Flows
2.1.3 Substitution of Energy Sources
2.2 Optimisation of a GES
2.2.1 General Comments

2.2.2 Approaches to System Optimisation
2.2.2.1 Scenario-Based Optimization
2.2.3 Dynamic Programming According to Bellmann
2.2.3.1 Optimization by Means of Linear Programming
References
3: Energy Use Sectors and Their Energy Consumption
3.1 General Remarks
3.2 Energy Supply (Gas, Electricity, Heat) and the Role of Hydrogen (H2)
3.3 Industry: Net Zero Factory
3.4 Households
3.5 Transport: Electric Mobility
3.6 Trade: Commerce
Services (GHD)
References
4: Methodology of Modelling the Energy Hub Components
4.1 Introduction

4.2 Methodology for Modelling Generation Sectors
4.2.1 Electricity
4.2.1.1 Introduction
4.2.1.2 Modelling of Electricity Network Infrastructures
4.2.1.3 Simulation and Network Calculation Tool
4.2.2 Gas
4.2.2.1 Introduction
4.2.2.2 Modelling of Gas Network Infrastructures
4.2.2.3 Simulation and Software Tools
4.2.3 Heat
4.2.3.1 Introduction
4.2.3.2 Modelling of Heat Network Infrastructures
4.2.3.3 Simulation and Software Tools
4.2.4 Energy Market Design, Market Roles
References
5: Flexibility of a General Energy System (GES)

5.1 Safe Operation of the General Energy System (GES)
5.2 Energy Storage
5.3 Evaluation of Flexibility
5.3.1 Introduction
5.3.2 Flexgraphs
5.3.3 Buffer Characteristics
5.3.4 Variable and Fixed Power Profiles
5.3.5 15-min Energy Values
5.4 Legal Framework
5.4.1 Introduction
5.4.2 Disconnectable Loads
5.4.3 Interruptible Consumption Units
5.4.4 Future Flexibility, System-Side Needs Analysis
References
6: Role of Information and Communication Technology (ICT): Digitalisation of the Energy Industry