On the topological characteristics of power grids with distributed generation

摘要

The interconnection of large-scale distributed generation with power grids brings about significant impacts on the grid patterns, the topologies and the network performances of the future power grids. In this paper, these impacts are investigated by applying the complex network theory. We analyze and verify some existing statistical indices used in bulk power grids and propose some basic principles for the research on the impacts of distributed generation on the topological characteristics of power grids. Consequently, two groups of novel indices are put forward, including the structure index based on operational conditions and the operational index based on network structures. Finally, some illustrative tests are carried out on the IEEE 57 bus system and the results validate the proposed indices.