Chain extension power supply system

Abstract

The invention relates to a power supply system, in particular to a chain extension power supply system, which is applied to bar-shaped and zonal urban regions. In a set region, three power points distributed in a bar shape are provided, four feeder lines are formed between every two adjacent power points, each feeder line adopts a multi-segment connection mode, and power is supplied to the regionby feeder line units of a double-loop network. The chain extension power supply system initiatively put forwards a chain extension intermediate-voltage distribution network power supply mode suitablefor the standardization and differentiation of bar-shaped and zonal regional forms, has high symmetry and uniformity, optimizes the power distribution points of a high voltage distribution networks and reorganizes the network structure of an intermediate voltage distribution network, thereby improving the power supply reliability of the distribution network, shortening the power failure time of aser, enhancing the power supply transferring capability of the distribution network, gradually eliminating power supply 'bottlenecks' and weak links, enhancing the resistance of the distribution network to natural disasters and providing strong support for the construction of the distribution network. In a development process, the power supply system has relatively higher extensibility, and the reliability of the system is fully ensured.

Description

technical field [0001] The invention relates to a power supply system, in particular to a chain-type extended power supply system, which is suitable for strip-shaped and belt-shaped urban areas. Background technique [0002] The grid structure is the "bones" of the medium voltage distribution network. The domestic research and practice on the grid structure in the prior art are all focused on the wiring mode, and the wiring mode only reflects the structure and connection between several medium voltage feeders. relationship, and cannot reflect power distribution factors such as regional characteristics and load characteristics. Therefore, the inventor proposed a triangular extended power supply system in July 2010 (patent number: ZL201020265077.9). one or more areas. However, among various typical urban forms, there is an urban form called belt city, which is an urban regional form mainly formed under the action of the axial force along the traffic line. The axes are distr...

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Problems solved by technology

However, among various typical urban forms, there is an urban form called belt city, which is an urban regional form mainly formed under the action of the axial force along the traffic line. The axes are distributed in bands, such as some cities in the coastal areas. Obviously, such geographical conditions cannot be applied to the triangular extended power supply system

However, the common wiring mode adopts single-ring network open-loop operation. Since the regional characteristics and load characteristics are not considered, circuitous power supply problems are prone to occur, resulting in power supply "bottlenecks", poor construction reliability, high cost, and no scalability.

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