Snowflake grid type grid construction method suitable for urban medium voltage distribution networks

Abstract

The invention relates to a snowflake grid type grid construction method suitable for urban medium voltage distribution networks. The method comprises the following steps: selecting equipment of a snowflake grid type grid for constructing the 10kV medium voltage distribution networks; constructing a main gird of the snowflake grid type grid consisting of a feeder line cluster; connecting the equipment on the main grid; and constructing a load transfer passage to form the snowflake grid type grid. The method has the effects that each feeder line in the target grid structure formed by adopting the method is reasonably segmented and contacted, has automatic detection, isolation and network reconstruction for failures and self-healing capacity of power restoration, and can meet the power supply requirement of various types of users, so that the utilization efficiency of power distribution equipment is improved, optimal allocation of resources and optimal capital efficiency are realized, the benefit efficiency of the grid is fully developed, and thus the target grid structure is more scientific and complete. The method is easy to master and operate, simple and clear, and is convenient for actual operators to master skillfully.

Description

technical field [0001] The invention belongs to the technical field of medium-voltage distribution networks, and in particular relates to a method for constructing a snowflake grid structure suitable for urban medium-voltage distribution networks. Background technique [0002] The medium-voltage lines of urban power grids generally adopt the form of cable erection. Typical grid structures include single-ring network and double-ring network. The single-ring network and double-ring network are introduced as follows. [0003] Cable single ring network such as figure 1 As shown, the ring network points are generally ring network cabinets, box-type stations or ring network distribution stations. Since each ring network point has two load switches (or circuit breakers E), it can isolate any section (that is, two substations A, Between B) line failure, so that the user's power outage time is greatly shortened, only when the terminal transformer (single configuration) fails, the us...

AI Technical Summary

Problems solved by technology

However, due to the characteristics of randomness and dispersal of users, when users access the medium-voltage distribution network, there will be situations such as unreasonable segmentation of the grid structure, complicated connections, and invalid connections.

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