Textbook in PDF format In this book, voltage source converters (VSCs) as key components of sustainable energy systems based on wind power plants, photovoltaic power plants, battery energy systems, electric vehicles and heat pumps are investigated. In the future, 100% inverter-based power systems (IBPS) will arise. Protective systems against grid faults are a substantial part of electrical grids. They prevent danger to living beings and damage to technical equipment caused by grid faults. The control algorithms of VSCs and protection algorithms must collaborate in future grids. Otherwise, the reliability of energy supply is at risk. Today, control and protection are often regarded independently of each other. In this book, they are investigated mutually. The resilience of the system against grid faults is increased by using flexibility options of VSCs. A universal protection algorithm, which does not restrict these flexibility options, is developed