Power grid planning method based on multi-core grid construction mode

Abstract

The invention discloses a power grid planning method based on a multi-core grid construction mode. The method comprises the following steps of acquiring the current power grid situation and planning boundary conditions, dividing core power grids, making the grid construction scheme of each core power grid, determining the interconnection mode among the core power grids, carrying out electrical check and analysis, making an implementation scheme of each stage and investment estimation, and outputting a target grid structure planning scheme. Through leading loads and power supplies to develop harmonically, self-balanced core power grids and the backbone grid structures are formed gradually, connection among the core power grids is simplified gradually and weakened, the target grid structure forms the structure with the core power grids as the basic units finally, each core power grid can basically realize self balancing in actual running, and the core power grids are independent relatively and can support each other. Differential planning is carried out on connection among the core power grids, the planned target grid structure has the advantages that the structure is simple and risks are dispersed, local grids can be abandoned to save the entire grid in the case of severe failure, and large-area blackout can be effectively avoided.

Description

technical field [0001] The invention relates to a grid planning method, in particular to a grid planning method based on a multi-core network construction 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 start from the long-term target power grid structure, optimize and adjust the planning of the power grid to ensure the safe operation and long-term stability of the power grid. [0003] The traditional power grid planning method-the research method of the target grid structure, in the face of the increasingly complex grid structure, it is difficult to control the power flow, it is difficult to build the second and third defense lines of the grid security, and the ability to resist serious faults is poor. There is a risk of large-scale po...

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Problems solved by technology

Among them, the vision of the network construction mode of the inner and outer ring network will be difficult to solve the problems of complex grid structure, high short-circuit current, and high risk of large-scale power outages; the UHV AC network construction mode has the main shortcomings of system stability and reliability that are not easy to solve. The application prospect is not clear; the group network construction mode enhances the controllability of the power flow and reduces the risk of large-scale power outages and grid collapses, but it does not have strong guidance for the internal network structure of the group and lacks actual support for the network structure plan

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