Transformer looped network structure fault control method

Abstract

The invention discloses a transformer looped network structure fault control method. The method comprises two petal type wiring looped network racks. One petal type wiring looped network rack comprises a loop formed by a transformer substation bus A, a bus section I in the power distribution station A and a bus section I in a power distribution station B; the bus section I in the power distribution station A and the bus section I in the power distribution station B are provided with first bus tie switches. The other petal type wiring looped network rack comprises a loop formed by a substationbus B, a bus section II in the power distribution station A and a bus section II in the power distribution station B; and the bus section II in the power distribution station A and the bus section IIin the power distribution station B are provided with second bus tie switches; and the petals of the petal type wiring looped network racks are connected with one another through a first system converter and a second system converter which are connected with each other. The architecture disclosed by the invention can coordinate loads, eliminate heavy load risks, improve an equipment utilization rate and improve power supply reliability.

Description

technical field [0001] The invention discloses a fault control method for a transformer ring network structure, and relates to the technical field of hybrid AC and DC distribution network architecture. Background technique [0002] The rural power distribution network is connected to the main grid of the grid, and the electricity used by thousands of households in rural areas is not only a key technology for connecting the main grid, various users and distributed energy, but also an important part of building a strong smart grid. The operation control of the 10kV distribution network is relatively simple. Although the 10kV distribution network adopts the ring network connection mode, most of them are single-radiation open-loop operation. With the development of economy and society and the gradual advancement of smart grid, the disadvantages of open-loop operation are gradually becoming prominent. Open-loop operation not only affects the further improvement of power supply r...

AI Technical Summary

Problems solved by technology

Open-loop operation not only affects the further improvement of power supply reliability, but also cannot meet the friendly access of large-scale distributed energy

[0003] In the prior art, there is a ring-network-closing grid system based on the distribution automation terminal, which realizes the closed-loop operation of the distribution network. However, when a fault occurs, although the power supply can be transferred through the tie line, there is still a second-level delay. Power failure occurs, which cannot meet the needs of high-sensitivity loads such as precision processing and semiconductor manufacturing enterprises

And with the development of distributed energy, this system cannot meet the friendly access of large-scale distributed energy

In the prior art, there is a lack of a distribution network architecture that facilitates the closed-loop operation of multiple AC lines and flexible power control. When a fault occurs, the load can be quickly transferred by switching the operation mode to improve the reliability of power supply.

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