Conception, Key Technology and Prospect of Honeycomb-shape Active Distribution Network

Abstract

The distribution network based on conventional topology is hard to adapt to the access of large-scale renewable energy, and the large-scale application of microgrid technology has become the development trend of distributed active smart distribution network in the future. A novel honeycomb topology of active distribution network is proposed, in which a cluster microgrid with standardized configuration of source, grid, load and storage is combined into a network in the form of a honeycomb by using smart power/information exchange stations (SPIESs), and it can realize regional autonomy and wide area interconnection of microgrid. On the basis of comparing with other deformed topologies, it is considered that honeycomb-shape active distribution network is one of the optimal topologies for smart distribution network, which is worthy of further study. An exploratory study is made on the implementation method and key technology of the proposed topology. The communication mechanism based on hierarchical control, the economic operation model of SPIESs and the economic dispatch model of microgrid are preliminarily established. After comparing with existing distribution network program, the proposed topology is considered that it has advantages of strong network architecture, high consumption of clean energy, flexible distribution method and supporting power market transactions. At last, challenges faced by the new distribution network topology in terms of economy and technology are analyzed, and the future research directions are prospected.