About the book
Traditional power systems contain synchronous based generators which are inherently stable. Renewable energy resources in smart modern power systems are connected through three phase inverters which convert DC power to AC power. The basic control strategy for microgrids is the hierarchical control, including primary control (droop control), secondary control (restoration of voltage and frequency), and tertiary control (optimal operation). The existing secondary control strategies have endeavored from centralized control (with low reliability), decentralized control, to the current distributed control (with high reliability and low cost). This is partly inspired by the idea of cooperative control for multi-agent systems, which allows all DGs to communicate with their neighbors and share information among neighboring units via local communication networks.
The inverters as energy conversion systems should be designed carefully in regard to different aspects in static and dynamic contexts. Topology selection, design, optimization, control and operation, interaction, power quality and cyber security car will be the main topics that this book will cover.