8 Distributed Generation
This chapter begins with a description of different distributed generation (DG) technologies. These are presented from the point of view of their working principle and their way of connecting to the network. An introduction is also given to the load flow problem in DG systems. The different types of nodes are defined and the problem equations are formulated. The network connection of DG involves a change in the control of the system and the quality of the electrical power. In some cases, this connection leads to a deterioration of the quality indices of electric power. In other cases, it may serve to improve these indices. So, this chapter includes a section in which the impact of DG on the quality of electric power is analyzed. The last section is devoted to present and analyze different control strategies of the inverters that are used as interface for the connection between DG and network.