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Dynamic adjustment method for structure of regional power grid in allusion to main transformer overload

A technology for dynamic adjustment of regional power grids, applied in instruments, data processing applications, calculations, etc., can solve problems such as inaccurate results, achieve accurate results, improve economic benefits, and reduce load shedding

Inactive Publication Date: 2017-04-19
STATE GRID JIANGSU ELECTRIC POWER CO LIANYUNGANG POWER SUPPLY CO +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, most of the load transfers rely on the operating experience of dispatchers to formulate specific transfer plans, and the results are not accurate enough.

Method used

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  • Dynamic adjustment method for structure of regional power grid in allusion to main transformer overload
  • Dynamic adjustment method for structure of regional power grid in allusion to main transformer overload
  • Dynamic adjustment method for structure of regional power grid in allusion to main transformer overload

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Experimental program
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Embodiment

[0067] At present, my country's power grid mostly adopts a pattern of hierarchical and partitioned operation, that is, on the basis of the increasingly perfect 750kV / 500kV main grid frame, the lower-level 330kV / 220kV grid is untied and segmented to form one or more 750kV / The 500kV substation is the core, and the area includes 330kV / 220kV side power plants with 330kV / 220kV power grid divisional operation format.

[0068] This embodiment considers the overload of the 500kV main transformer in the regional power grid, and dynamically adjusts the structure of the regional power grid by switching 220kV lines. The expected faults considered include N-1 faults of the 500kV line and the main transformer.

[0069] Such as figure 1 As shown, a method for dynamically adjusting the structure of the regional power grid aimed at main transformer overload in this embodiment includes the following steps:

[0070] Step 1, read the operation mode of the regional power grid and the correspondin...

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Abstract

The invention discloses a dynamic adjustment method for the structure of a regional power grid in allusion to main transformer overload, and belongs to the technical field of power system operation control. According to the method, the topological structure of the power grid is dynamically adjusted through line switching, and a condition of main transformer overload is solved or relieved through changing flow distribution of the power grid; and the load balancing degree and the short-circuit current and voltage level of the power grid are comprehensively considered for a feasible power grid structure adjustment scheme, the weight of each single index is determined, then superior and inferior sorting is performed on the feasible schemes according to the size of a comprehensive index, and an optimal adjustment scheme is determined. According to the dynamic adjustment method, a load shedding operation is not required to be performed, and the power supply reliability of the regional power grid is improved.

Description

technical field [0001] The invention relates to the technical field of power system operation control, in particular to a method for dynamically adjusting the structure of a regional power grid aimed at main transformer overload. Background technique [0002] With the rapid increase of the load, the load of the 500kV substation of the power grid in some areas has exceeded its rated capacity. During the period of heavy load such as peak season or part of the main transformer outage for maintenance, if no control measures are taken, the main transformer may be overloaded up to 150%. Once the overcurrent protection action setting value of the main transformer is reached, the main transformer It will trip, which will seriously affect the power supply reliability and stable operation of the regional power grid. [0003] At present, for the main transformer overload problem, the main method adopted is to shed the load according to the order, which can ensure the power supply of i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q50/06
CPCG06Q50/06
Inventor 封波汤奕蔡明明孙海霞王华雷张志福许其楼朱立位
Owner STATE GRID JIANGSU ELECTRIC POWER CO LIANYUNGANG POWER SUPPLY CO
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