Development of a distribution network simulater connected with PV systems

摘要

Islanding is one of serious problems in an electric power system connected with dispersed power sources. To secure the power system from islanding, it is quite important to verify the ability of islanding detection for the individual power sources in advance. The authors have been developing a scaled-down, simulated distribution network including a distribution substation, a high-voltage grid in sections, pole transformers, low-voltage lines, customer loads and a number of PV systems. This installation can be used for testing plural PV inverters as well as a number of AC modules. It is also considered useful for studying interference phenomena among multiple inverters. As the first stage of the development, several types of 3-4 kW class PV inverters have been evaluated.