Segmented annular distribution network

Abstract

The invention discloses a segmented annular distribution network. The segmented annular distribution network comprises a first substation and a second substation, major loop output terminals of the first substation and the second substation are respectively provided with a breaker, output terminals of the breakers are connected to form a power transmission loop, and at least a load cabinet is connected in the power transmission loop between the two breakers. According to the segmented annular distribution network, the first substation and the second substation are connected with two terminal of the annular network via the breakers, power supply for the whole network can be realized by any substation, segmented power supply can be realized via the load cabinets arranged in the power transmission loop, the reliability of the power supply network is greatly improved, the power supply of the whole network is not affected even one substation has power failure, the power transmission loop with power supplies at two terminals is formed in the operation process, the power transmission loop is designed in a closed loop manner and operates in an open loop manner, the power supply at any terminal can supply the whole load, the power transmission loop is divided into a plurality of power transmission branch circuits via the load cabinets, the power failure range is greatly reduced, and the power failure time is shortened.

Description

technical field [0001] The invention relates to the technical field of power transmission and distribution, in particular to a segmented power distribution ring network. Background technique [0002] With the development of China's economy, while the demand for electricity is increasing, higher requirements are put forward for the reliability of power supply and the quality of power supply service. The first-class standard for electric power enterprises requires the reliability rate of power supply to reach 99.96%. The implementation of distribution automation is The most direct and effective way to improve the reliability of power supply. Distribution automation is based on the network structure construction of ring network power supply and open-loop operation. At present, most of China's urban and rural distribution networks adopt radial power supply mode, generally tree Radial network structure, this kind of distribution network structure is simple and practical, with sma...

AI Technical Summary

Problems solved by technology

[0002] With the development of China's economy, while the demand for electricity is increasing, higher requirements are put forward for the reliability of power supply and the quality of power supply service. The first-class standard for electric power enterprises requires the reliability rate of power supply to reach 99.96%. The implementation of distribution automation is The most direct and effective way to improve the reliability of power supply. Distribution automation is based on the network structure construction of ring network power supply and open-loop operation. At present, most of China's urban and rural distribution networks adopt radial power supply mode, generally tree Radial network structure, this kind of distribution network structure is simple and practical, with small investment, convenient maintenance, low construction cost, but low reliability. Both will cause power outage of the whole line, and the urban distribution network with high reliability requirements has been gradually eliminated. With the improvement of the reliability requirements of the distribution network, some ordinary ring distribution network structures have gradually appeared. For a ring network, the investment of this distribution network structure is larger than that of the radial network structure, but it can supply power in segments, so the power outage range is much smaller, and the reliability is higher than that of the radial network structure. However, due to this network structure The power supply comes from one power source. When the substation loses power, it will cause a power outage of the entire network, and the scope of influence is wider.

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