A Construction Method of Growth and Evolution Model of Power Grid with Two Voltage Levels

Abstract

The invention discloses a method for constructing a growth and evolution model of a two-voltage-level power grid. The method comprises the steps of: simulating annual load increase and power injectionof a superior power grid transformer substation; judging whether to expand the superior power grid transformer substation according to an average capacity-load ratio of a superior power grid; determining whether a new subordinate power grid transformer substation needs to be constructed at present day, if so, determining a position, load and capacity of the new transformer substation, and accessing the new transformer substation to a power grid according to a space-time evolution model; judging a system is in power shortage, and if so, determining a new superior power grid transformer substation or subordinate power grid transformer substation according to a probability; performing N-1 verification on lines, and upgrading and transforming weak lines not satisfying the verification; and repeating the above steps until a number of iteration days exceeds a number of required iteration days. The method is designed for the power grid with two voltage levels, considers the new construction,expansion, upgrading and transforming of transformer substations, power plants and lines in the growth and evolution processes of the power grid, evolves the power grid from the aspects of time and space, and is of a certain guiding significance to power grid planning and construction.

Description

technical field [0001] The invention relates to the technical field of power grid growth and evolution, in particular to a method for constructing a growth and evolution model of a power grid with two voltage levels. Background technique [0002] As the scale of my country's power grid continues to expand, the interconnection of cross-regional power grids brings huge economic and social benefits, but also makes the network structure and operation mode more complex, so the difficulty of ensuring the safe and stable operation of the power system is also increasing. [0003] When the demand for electricity increases to a certain extent and the reserve capacity of the system is too low, it is necessary to build a new power plant according to the energy distribution, and determine the voltage level and method of connecting it to the grid. The address and capacity of the substation, and determine the voltage level and method of its access to the grid. It can be seen that the incr...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of evolving the power grid from two levels of time and space when substations, power plants and lines are newly built, expanded and upgraded during the growth and evolution of the power grid, and to provide a two-voltage level power grid growth Method of Constructing Evolutionary Model

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