Triangle extension power-supply system

Abstract

The invention relates to a power-supply system, in particular to a triangle extension power-supply system, which is a dual ring network among three power-supply point feed-out stations so as to form a triangle power-supply system to supply power for a setting power-supply area; the dual ring network connection is arranged in the periphery of the power-supply area and between each two power-supply points, i.e. A station and B station, B station and C station and A station and C station, thus forming a power-supply system with a triangle structure; and a central area is set in the power-supply area, and each two power-supply points which pass through the central area are connected by a single ring network among stations. The advantages of the invention lie in that a triangle is a stable geometric figure, three power-supply points are easy set to form a triangle power-supply area in the power-supply area, thereby having flexible and reliable power-supply performance; three power-supply points in a basic model are needed, stationing is simple and convenient and economical efficiency is high. The system can carry out system extension by skillfully using geometrical property of the triangle based on the periphery of the developed triangle extension basic power-supply system.

Description

technical field [0001] The invention relates to a power supply system, in particular to a triangular extended power supply system, in which three power supply points are fed out to a double-ring network between stations, forming a triangular power supply system to supply power to a set power supply area. Background technique [0002] The power supply system in the prior art is usually a single-circuit single-ring network structure, that is, the lines fed out from the medium-voltage busbars of two substations in the same power supply area form a single-ring network, and the open-loop operation generally only serves users. Provide a single power supply, which is suitable for areas with low load density, scattered load points, and low user reliability requirements. However, the power supply area is becoming more and more complex, the load density is high, the load points are concentrated, and the power consumption requirements of users are different. The original power supply s...

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Problems solved by technology

[0002] The power supply system in the prior art is usually a single-circuit single-ring network structure, that is, the lines fed out from the medium-voltage busbars of two substations in the same power supply area form a single-ring network, and the open-loop operation generally only serves users. Provides a single power supply, which is suitable for areas with low load density, scattered load points, and low user reliability requirements

However, the power supply area is becoming more and more complex, the load density is high, the load points are concentrated, and the power consumption requirements of users are different. The original power supply system architecture has been difficult to meet the growing power supply requirements.

Chinese patent ZL2008101145036 provides a medium-voltage distribution network system with 3×4 wiring, but the system adopts a single-ring network structure power supply system, and its power supply reliability is not high, and for power supply areas with high load density, It is still necessary to increase the power points to solve the load problem. The increase of power points not only has high requirements on the number and layout of substations, but the complicated contact method brings a lot of inconvenience to operation and maintenance, and it is also prone to circuitous power supply problems, and the economy is also poor.

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