Diamond-type power distribution network

Abstract

The invention discloses a diamond type power distribution network. The diamond-type power distribution network comprises a plurality of transformer substations, a plurality of switching stations and aplurality of looped network stations, the diamond-type power distribution network adopts a layered and graded structure and is divided into a backbone network which is formed by a transformer substation and a switching station, takes the switching station as a core node, supplies power to four circuits of a bilateral power supply nearby, is connected with a double-loop network and operates in anopen-loop manner, and a secondary backbone network which is formed by the switching station and a looped network site, takes the looped network site as a node and takes the switching station; and a transformer substation in a backbone network is provided with self-healing devices according to 10kV outgoing line intervals, and a switching station is provided with a self-healing protection control device according to bus sections. According to the invention, the switching station double-loop network is used as the backbone network; and the diamond type power distribution network has good power supply and user access adaptive capacity, flexible inter-station load transfer and balance capacity and rapid network fault self-healing capacity, has good economy and implementability in central urbanpower distribution network construction and transformation, and lays a solid foundation for realizing high-quality development of a power distribution network and constructing a first-class energy internet.

Description

technical field [0001] The invention relates to the field of distribution networks, in particular to a diamond-shaped distribution network with switch stations as nodes. Background technique [0002] At present, some cities have launched a new round of distribution network upgrades to meet the needs of load growth and urban development, but the problems and challenges faced by the medium-voltage distribution network are still diverse, mainly reflected in: (1) The high-voltage distribution network is directly oriented to users. At present, the cable network is mainly a single-ring network powered by a single-side power supply. In the event of a fault, the load transfer capacity between stations is insufficient, which affects the security of power supply; (2) The high-voltage distribution network is facing large-scale The long-term coexistence of 110kV main transformer and small-capacity 35kV main transformer, but the current medium-voltage distribution network under the norma...

AI Technical Summary

Problems solved by technology

The advantage of this method is that only load switches are configured in the ring network, and generally no segment switches are configured, and the investment economy is better; the load transfer capability between stations and the load balancing ability between stations are relatively high, but the disadvantage is that the ring network The load switch does not have the relay protection function. In the case of a fault, the outlet switch of the substation is first disconnected, the whole line is blacked out, and then the distribution automation is used for fault location, fault isolation, network reconstruction and power supply recovery. The power supply recovery time is on the order of minutes

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