IEC61850 based modeling of self-control area for topology recognition in hierarchical and distributed control of distribution network
Large scale application of intermittent energy resources in distribution network has brought about great challenges to information processing on operation-management level. To make the processing more scientific and orderly, the concept of hierarchical and distributed control mode was put forward, in which all the DER systems in one distribution network are divided into several self-control areas, operating optimized controlling independently and hierarchically. Currently, there is no uniform information model to describe the concept “self-control area” yet, which makes it difficult for upper management class to operate topology recognition and to update the information of feeders connected to a certain self-control area timely. In this paper, the functional requirements for hierarchical and distributed control were analyzed, and an information model for self-control area is constructed. The information model hides specific characteristics of DER equipment within the self-control area and only provides generic view of the DER system for the upper management level. In addition, the model is constructed according to IEC61850 standard rule, containing additional information about the area's boundary, which helps improve the information interaction between different DER systems. Finally, a study case was constructed to illustrate the general progress of self-control area coordinate controlling and how the topology recognition system was realized.