Medium-voltage-low-voltage double-layer honeycomb network structure for urban power distribution network

Abstract

The invention relates to an urban power distribution network-oriented medium-voltage and low-voltage double-layer honeycomb network structure. The structure comprises a 10kV medium-voltage power distribution network layer and a 380V low-voltage power distribution network layer, wherein the 10kV medium-voltage power distribution network layer is a medium-voltage honeycomb network layer, and the medium-voltage honeycomb network layer forms a honeycomb topological structure by taking hexagonal feeder grids as basic units; the 380V low-voltage distribution network layer is a low-voltage honeycombnetwork layer, and the low-voltage honeycomb network layer forms a honeycomb topological structure by taking a microgrid with a hexagonal power supply boundary as a basic unit; and the medium-voltagehoneycomb network layer and the low-voltage honeycomb network layer are connected to form a double-layer honeycomb network structure. According to the structure, the power distribution network structure in which the medium-voltage and low-voltage power distribution networks all adopt the honeycomb topology is proposed for the first time, and compared with the existing honeycomb power distributionnetwork topology, flexibility of the medium-voltage power distribution network is further improved, power flow optimization control of the power distribution network in a larger range is favorably realized, and power supply reliability and the absorption capability of clean energy are further improved.

Description

technical field [0001] The invention belongs to the technical field of distribution networks, and relates to urban distribution network planning, in particular to a medium-voltage-low-voltage double-layer honeycomb network structure oriented to urban distribution networks. Background technique [0002] With the transformation of global energy supply to clean, low-carbon, and electrification, the functions of the future distribution network will be more diverse, and the responsibilities will also be greater. The ever-growing distributed generation (distributed generation, DG), energy storage and electric vehicles, massive user resource management, compatibility with cold-heat-air and other energy sources, and new functional requirements such as coupling with information systems will make the distribution network Transform from a pure power distributor to a platform for energy transmission, distribution, trading and even storage among multiple loads, DG and upper-level grids. ...

AI Technical Summary

Problems solved by technology

The above-mentioned technical methods all need to be based on a highly connected grid to achieve the effect, and the current distribution network is difficult to meet

In other aspects, the existing distribution network operates in an open loop to limit the short-circuit current, so some non-fault areas have to experience short-term power outages during fault recovery, which cannot meet the high reliability requirements of users such as precision manufacturing

In addition, the current distribution network wiring is poorly standardized, which increases the difficulty of fine management and expansion and transformation

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