Power distribution network adopting four-loop-one-group crossed connection wiring

Abstract

The invention discloses a power distribution network adopting four-loop-one-group crossed connection wiring. The power distribution network comprises four buses, four power supply lines, four outlet switches, four connecting switches and 4N section switches, the four outlet switches are respectively arranged in the four power supply lines and are respectively arranged at the near bus ends of the power supply lines, the bus A is connected with the bus B through the connection switch K1, the bus C is connected with the bus D through the connection switch K2, the bus A is connected with the bus D through the connection switch K4, the bus B is connected with the bus C through the connection switch K3, a first connection line connected between the bus A and the bus D intersects with and is not connected with a second connection line connected between the bus B and the bus C, each of the power supply lines is provided with N section switches, the four connection switches are normally open switches, and the 4N section switches are normally close switches. The power distribution network has the advantages of high power supply reliability, good load expansibility, low construction cost, and convenience for operation and management.

Description

technical field [0001] The invention relates to the field of electric power, in particular to a distribution network using a group of four-circuit cross-connection connections. Background technique [0002] At present, the structure of the distribution network in various regions of the country is relatively complicated. The common wiring methods of the distribution network are: single radial, double radial, single ring network, multi-segment multi-connection, and 1 / 3 or 1 / 4 ring network. Most of the current distribution network wiring methods have two extremes: 1. The wiring method of the distribution network is too simple, there are few backup power sources, and the reliability of power supply is not high; Scheduling management, low load rate, resulting in waste of power equipment. [0003] The existing wiring methods of the distribution network often cannot satisfy the economical construction of the distribution network and the reliability of power supply at the same time...

AI Technical Summary

Problems solved by technology

[0007] The power supply reliability is high, but the disadvantage is that the investment is high. Each power user needs to build a separate power distribution cabinet, which increases the construction cost of the power grid, and the capacity utilization rate is also very low. Two of the four busbars need to be used as Backup power supply, in order to ensure the reliability of power supply, generally cannot supply power, and the utilization rate of its power capacity is only 50% (calculated according to the N-1 principle)

The advantage of this wiring method is: the reliability of power supply has been improved to a certain extent, but the project cost has been greatly increased. There is one line as a public no-load backup line, which exists as a redundant device for the power grid. Under normal circumstances, it cannot supply power to the line. , resulting in a waste of power equipment, and when the two power lines fail, it is difficult to ensure the normal power supply of the load

Images