Dot-type expansion power supply system

Abstract

The invention relates to a power supply system, in particular to a dot-type expansion power supply system which is suitable for the regions with low load density and sparse distribution of transformer substations as well as for the areas of which the landform structure is disperse and the loads are separated by mountains, lakes, rivers and the like and can not be integrally connected. The dot-type expansion power supply system is characterized in that eight feeder lines are fed from a power point; each feeder line is provided with multiple section switches; every two feeder lines form a unit; and a connection switch is arranged in the middle of each feeder line unit so as to form an in-station interconnection structure. A dot-type radiation power supply grid structure is formed, each feeder line unit adopts a multi-section two-connection wiring mode, the structure is relatively simple, the automatic distribution is easy to implement, transition of various existing wiring modes can be realized, the cost is low, and the adaptability is relatively strong; and moreover, as the regional characteristics and load characteristics are taken into full consideration, the entire dot-type expansion structure has relatively good expansion performance, the power supply reliability of the system is completely ensured, the construction cost is low, and the power supply flexibility is high.

Description

technical field [0001] The invention relates to a power supply system, in particular to a point-like extended power supply system, which is suitable for areas with low load density and sparse distribution of substation stations, and scattered terrain structures, and the load distribution is blocked by mountains, lakes, rivers, etc., and cannot be connected together. The area of ​​the whole block. Background technique [0002] The grid structure is the "muscle" of the medium-voltage distribution network. In the prior art, the research and practice of the grid structure in China focus on the wiring mode, and the wiring mode only reflects the structure and connection between several medium-voltage feeders. It cannot reflect the distribution factors such as regional characteristics and load characteristics. Therefore, the inventor proposed a triangular extension power supply system in July 2010 (patent number: ZL201020265077.9). The power supply grid structure is suitable for h...

AI Technical Summary

Problems solved by technology

Obviously, for areas with low load density and sparse distribution of substations, as well as areas where the terrain structure is scattered and the load distribution is blocked by mountains, lakes, rivers, etc., and cannot be connected into a whole block, the above triangular power supply system cannot be applied.

The common wiring mode adopts single-ring network open-loop operation. Since the geographical characteristics and load characteristics are not considered, circuitous power supply problems are prone to occur, and the construction reliability is poor, the cost is high, and there is no scalability.

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