3*4 wiring method for medium-pressure distribution network

Abstract

The invention relates to a new 3*4 wiring method for a medium-pressure distribution network. The method adopts a wiring mode of three electric power sources and four loops. An electrical power source A, an electrical power source B and an electrical power source C are adopted to supply power to an area, and the three power sources are arranged roughly in the shape of a triangle. The electrical power sources are connected in the following way: one line of the electrical power source A and one line of the electrical power source B consist of a loop 1, another line of the electrical power source B and one line of the electrical power source C consist of a loop 2, another line of the electrical power source C and another line of the electrical power source A consist of a loop 3, and another line of the electrical power A, another line of the electrical power source B and another line of the electrical power source C consist of a loop 4, so that the four loops supply power to service area. Ten different ways are provided based on planning, operating and system expanding modes of each loop. Therefore, the wiring method is applicable to the planning and construction of 3-25 kilovolt medium-pressure distribution network.

Description

technical field [0001] The invention relates to a 3×4 wiring method of a medium-voltage distribution network, that is, a wiring method in which 3 power supplies form 4 loops, and belongs to the field of power grid construction and design. Background technique [0002] At present, the commonly used medium-voltage distribution network wiring methods include single-ring network wiring, double-ring network wiring, three power supply handles, N supply and one backup (N is a positive integer), "well" wiring, single-circuit radiation, double-circuit radiation, Open and close wiring, etc. However, the reliability of the single ring network is relatively low, and the others all have spare wiring, so the reliability is relatively high. Among the spare wiring, 4×6 wiring has high reliability, power supply capacity and flexible operation, but it needs 4 power supplies; single-ring network wiring needs two power supplies, double-ring network wiring needs 2-4 power supplies, and three po...

AI Technical Summary

Problems solved by technology

However, the reliability of the single ring network is low, and the others all have spare wiring, so the reliability is high

Among the spare wiring, 4×6 wiring has high reliability, power supply capacity and flexible operation, but it needs 4 power supplies; single-ring network wiring needs two power supplies, double-ring network wiring needs 2-4 power supplies, and three power supplies The handle needs 3 wires, 2 power supplies for one supply and one backup, three power supplies for two supplies and one backup, 4 power supplies for three supplies and one backup, and 4 power supplies for "well" wiring. These wirings have high power supply reliability , but the power supply capacity and operating flexibility are relatively weak

4×6 wiring is an excellent wiring form, but due to the need for 4 power supplies, it is often limited in practical use, especially when the distribution of power supply points is insufficient or the distribution of power supply is not dense.

In commercial areas, industrial areas and other areas of modern cities, the load level is relatively high, and the power supply capacity of the three-power hand-held ring network, two-supply and one-standby often cannot meet the power demand

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