Power distribution net rack wiring structure

Abstract

The invention discloses a power distribution net rack wiring structure which comprises multiple switch stations and substations, wherein each switch station comprises a first section of bus and a second section of bus connected in series through a section switch; each section of bus is connected with an incoming line, multiple outgoing lines and a connection line respectively; two incoming lines of each switch station are connected with different substations respectively; the connection line is arranged between the switch stations; one end of the connection line is connected with the first section of bus of one switch station, and the other end of the connection line is connected with the second section of bus of the other switch station. The power distribution net rack wiring structure disclosed by the invention has flexible operation mode and high reliability; with a centralized power supply mode of the switch stations, the operation and maintenance management is facilitated; the incoming line and connection line of each switch station are configured with optical-fiber longitudinal differential protection, and the section switch and connection switch of the bus of each switch station are configured with spare power automatic switching and expansion spare power automatic switching, so that the fault elimination of the distribution network and the power supply of the non-fault section can be accelerated, the fault-caused power failure time is reduced, the power supply reliability is improved, and the power distribution net rack wiring structure is suitable for the regions with insufficient medium-voltage interval of substations, limited outgoing line corridors, centralized loads and high reliability requirements.

Description

technical field [0001] The invention relates to a wiring structure of a distribution grid. Background technique [0002] Shanghai is the largest city in my country, one of the four central municipalities, and the center of my country's economy, finance, trade and shipping. In 2012, Shanghai's GCP reached 2.01 trillion yuan, ranking 11th in the world. The per capita GCP and per capita disposable income rank first in all provinces, autonomous regions and municipalities directly under the Central Government. Shanghai is currently in a critical period of "industrial transformation" and is striving to build "four centers" - an international economic center, an international financial center, an international trade center, and an international shipping center. This puts forward higher requirements for the city's power supply capacity. . [0003] Shanghai Pudong New Area covers an area of ​​1210.41 square kilometers. Since the Party Central Committee and the State Council decide...

AI Technical Summary

Problems solved by technology

[0007] 1. The section capacity of the overhead line is too large, and the connection is too small;

[0008] 2. Type III distribution stations built according to old standards do not conform to current technical principles;

[0009] 3. Atypical wiring exists in overhead lines

[0014] 4. The overall number of switching stations is relatively small, and the interval of 10kV is tight;

[0015] 5. There is a large ring network and a small ring network structure, which brings technical difficulties to the deployment of distribution automation;

[0016] 6. The horizontal connection of the network frame is weak, and the load transfer capacity of the network frame is limited

Images