Power quality aspects of a future micro grid

Due to the increase of distributed generators (DG) in the public grid some parts, with high penetration of DGs, could be transformed into an autonomously operating micro grid. This paper will show how the grid of an existing Holyday park can be changed into an autonomous micro grid. An additional control system as well as additional storage systems and power electronics have to be implemented in order to maintain the balance between load and generated power, and to guarantee the quality of supply on an acceptable level. Therefore a measurement program is running concerning the generated power and the load behavior and some aspects of the quality of supply. This paper is especially focused on the existing harmonic problem coming from the interaction between grid components and installed solar inverters. At the end a new power quality test laboratory is presented