INTELLIGENT NODES IN DISTRIBUTION SYSTEMS - OPERATING CONCEPT

Due to gradually increasing loads, medium voltage distribution feeders come closer to their voltage and current limits. Furthermore the introduction of distributed generation (DG) causes larger voltage variations. In this paper a control and protection concept is proposed for so called Intelligent Nodes (INs) applied at medium voltage level. Firstly the control concept is described and illustrated with an example grid. Secondly the reliability impact of the introduction of an IN is analysed and requirements to the protection concept of INs are given.

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