Method for constructing growth and evolution model of two-voltage-level power grid

A technology of evolution model and voltage level, applied in the field of power grid growth and evolution

Active Publication Date: 2018-04-24
STATE GRID CORP OF CHINA +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 new

Method used

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  • Method for constructing growth and evolution model of two-voltage-level power grid
  • Method for constructing growth and evolution model of two-voltage-level power grid
  • Method for constructing growth and evolution model of two-voltage-level power grid

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Embodiment

[0075] In this example, the simulation analysis of the power grid growth and evolution model is carried out on the 500KV–220KV power grid in the north of Jingzhou, Hubei. The topology of the transmission network in this area is as follows figure 2 As shown in , it is based on the actual geographical location information of the local power network and drawn in a certain scale. figure 2 Only the topological structure of the power grid is displayed in , and information such as the number of lines, number of transformers, number of generators, some transformer branches, and 500KV power injection is not presented. There were two 500KV substations (Jiangling Substation and Xinglong Substation), two 220KV power plants (Shashi Power Plant and Jiangling Power Plant), and 16 220KV substations in this area, with a load of 2897.7MW. There are 7 double-circuit lines and 21 single-circuit lines in the power grid. In order to simulate the flow process of power transmission from west t...

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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...

Claims

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Application Information

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IPC IPC(8): H02J3/00
CPCH02J3/00H02J2203/20
Inventor 赵红生乔立殷奕恒凌汝晨叶倍颖彭越胡钋王博魏聪赵雄光郑旭张东寅徐敬友方仍存阮博刘巨熊志郑云飞熊秀文徐小琴
Owner STATE GRID CORP OF CHINA
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