A method of power grid planning based on three-dimensional network structure network model

Abstract

The invention relates to a power grid planning method based on a three-dimensional grid structure grid construction mode. Through adjusting and optimizing the prior grid construction structure, a two-layered or multi-layered power grid is formed at the power grid in the receiving end, each power grid layer still provides power for most areas before layer division, the close degree of electrical connection of the receiving-end power grid can be loosened properly in a mode of reducing the power supply load density. The power grids of layers are not directly connected, a peripheral large power supply or a transmitting-end system transmission channel is used for dispersed connection, power supply and voltage support are provided for each power grid layer, and safe stability and toughness of each power grid layer can be ensured. After the three-dimensional grid construction is adopted, weak connection among the power grid layer can be realized, adverse effects on the power grid are limited to one grid in the case of severe failure, the power grid short circuit current level can be effectively controlled, the safe stability problem caused when the power grid AC and DC systems are mutually influenced is lessened, the large-scale blackout risks are reduced, and reliability is improved.

Description

technical field [0001] The invention relates to a power grid planning method based on a three-dimensional network structure network mode. Background technique [0002] Economic development, electricity first. In order to ensure the sustainable development of the economy and society, solve the problems existing in the current and future development of the power grid, and avoid large-scale power outages, it is urgent to optimize and adjust the power grid based on the long-term target power grid structure to ensure the safe operation and long-term stability of the power grid. [0003] The traditional target grid research method, in the case of increasingly complex power grid structure, is difficult to control the power flow, it is difficult to build the second and third defense lines of power grid security, the ability to resist serious faults is poor, and there is a possibility of large-scale power outages. Risk; when the power grid is closely connected, the number of hub sta...

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Problems solved by technology

[0003] The traditional target grid research method, in the case of increasingly complex power grid structure, is difficult to control the power flow, it is difficult to build the second and third defense lines of power grid security, the ability to resist serious faults is poor, and there is a possibility of large-scale power outages. Risk; when the power grid is closely connected, the number of hub stations is large, there are many outlets from a single power plant and substation, and the electrical distance between plants and stations is close, the overall short-circuit current level exceeds the standard, which increases the difficulty of system operation

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