Power distribution network structure capable of satisfying N-1 load non-losing under 35-220kV power grid overhaul mode

Abstract

The invention discloses a power distribution network structure capable of satisfying N-1 load non-losing under a 35-220kV power grid overhaul mode. The power distribution network structure comprises a first 220kV power supply, a second 220kV power supply, a first three-phase transformer, a second three-phase transformer, a first section switch and a second section switch, wherein the input end of the first three-phase transformer is connected with the output end of the first 220kV power supply; the first output end of the first three-phase transformer is connected to a 110kV bus while the second output end of the first three-phase transformer is connected to a 35kV bus; the input end of the second three-phase transformer is connected with the output end of the second 220kV power supply; the first output end of the second three-phase transformer is connected to the 110kV bus while the second output end of the second three-phase transformer is connected to the 35kV bus; the first section switch is arranged between the first output end of the first three-phase transformer and the first output end of the second three-phase transformer on the 110kV bus; and the second section switch is arranged between the second output end of the first three-phase transformer and the second output end of the second three-phase transformer on the 35kV bus. The power distribution network structure has the advantage of satisfying circuit N-1 load non-losing under the overhaul mode, and main transformer N-1 load non-losing under the overhaul mode.

Description

technical field [0001] The invention relates to a distribution network structure in which the maintenance mode N-1 of a 35-220kV power grid does not lose load. Background technique [0002] When a certain equipment in the power grid is out of operation, if a fault occurs at the same time, it may cause a large-scale power outage. However, with the continuous improvement of power supply requirements in international metropolises, the current dual power supply construction requirements in Shanghai cannot withstand the preventive maintenance mode. Serious faults such as N-1, with the improvement of reliable power supply requirements in the international metropolis of Shanghai, the ability to prevent faults needs to be continuously improved in the dual power supply construction requirements, and the construction requirements need to be further improved, and the structure can be strengthened to withstand preventive maintenance. N Ability to fail critically such as -1. Contents o...

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Problems solved by technology

[0002] When a certain equipment in the power grid is out of operation, if a fault occurs at the same time, it may cause a large-scale power outage. However, with the continuous improvement of power supply requirements in international metropolises, the current dual power supply construction requirements in Shanghai cannot withstand the preventive maintenance mode. Serious faults such as N-1, with the improvement of reliable power supply requirements in Shanghai's international metropolis, the ability to prevent faults needs to be continuously improved in the dual power supply construction requirements, and the construction requirements need to be further improved, and the structure can be strengthened to withstand preventive maintenance. N -1 and other critical failure capabilities

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