Control aspects of distribution networks with dispersed generation

The increase of dispersed generation (DG) has a strong impact on power system operation. A distribution network, where most of dispersed generators are connected, cannot be considered as passive anymore. Active character of the distribution networks brings problems and uncertainties, but at the same time offers more possibilities for control. Control of distribution networks with DG can be performed by means of primary controllers of dispersed generators, compensating devices and tap changers of transformers. Most of the control normally is using only local measurements. At the same time, it is obvious that the problems, which will arise with the increase of the DG in the future, must be solved by partially decentralized control (control, centralized inside defined area). In this paper, possible structure for such control is presented.