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Electrical partition-based electromagnetic loop network-containing critical transmission section search method

A technology for electrical partitioning and transmission sections, applied to electrical components, circuit devices, AC network circuits, etc., can solve problems that are difficult to apply to engineering practice, unable to search for electromagnetic ring network transmission sections, and not considered

Inactive Publication Date: 2016-08-17
NORTH CHINA ELECTRIC POWER UNIV (BAODING) +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since this type of algorithm does not consider the influence of factors such as voltage level and power flow on power flow transfer, it is difficult to apply it in engineering practice.
[0007] It can be seen that although the section search method based on electrical partitions can simplify the power grid and reduce the workload, it cannot search the transmission section of the electromagnetic ring network with key branches; the section search method based on key branches is currently difficult to apply to engineering Actually, needs to be improved
In summary, the above two types of methods are not suitable for the search of key transmission sections containing electromagnetic ring networks.

Method used

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  • Electrical partition-based electromagnetic loop network-containing critical transmission section search method
  • Electrical partition-based electromagnetic loop network-containing critical transmission section search method
  • Electrical partition-based electromagnetic loop network-containing critical transmission section search method

Examples

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Embodiment 1

[0085] figure 1 , the flow chart of a method for searching a key transmission section with an electromagnetic ring network based on electrical partitions provided by the present invention includes:

[0086] S1: Obtain power grid parameters, and after voltage level reduction, the impedance matrix Z of the entire grid is formed. The power grid parameter reduction formulas for different voltage levels are as follows:

[0087] R ′ = R / ( V i V 0 ) 2

[0088] X ′ = X / ( V i V 0 ) ...

Embodiment 2

[0148] figure 2 It is a schematic diagram of a regional power grid. Taking this as an example, a method for searching key transmission sections based on electrical partitions of an electromagnetic ring network provided by the present invention includes:

[0149] S1: Get grid parameters. There are 4 750kV substations, 14 330kV substations, 3 750kV lines, and 25 330kV lines in the regional power grid. The specific parameters of the components are shown in Appendix 1. Calculate the originals of different voltage levels according to formula (1), select the 330kV voltage level as the basic voltage level, and calculate the 750kV grid element parameters according to formula (1). With 750kV line l A-B For example, the pre-reduction line l A-B impedance x AB =72.36Ω, the impedance after reduction x AB 'for:

[0150] x A B ′ = X / ...

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Abstract

The invention discloses an electrical partition-based electromagnetic loop network-containing critical transmission section search method, which comprises the steps as follows: power network parameters are obtained; an impedance matrix of a system is formed after voltage grade reduction; the system is a power system; all systems hereinafter are the power systems; electrical partitioning is carried out on an actual power network; partition sections between various electrical partitions are searched; the partition sections are combined to obtain electromagnetic loop network-containing transmission sections; the criticality of the transmission sections is defined; and calculation sorting is carried out on the criticality of various sections to obtain the critical transmission section. The critical transmission section search method disclosed by the invention well adapts to electromagnetic loop network-containing transmission section search.

Description

technical field [0001] The invention relates to the field of power system operation and control, in particular to a method for searching key transmission sections based on electrical partitions containing electromagnetic ring networks. Background technique [0002] With the construction of UHV and large interconnected power grids in China, 1000kV / 500kV electromagnetic ring network will also appear in my country's power grid, and even a 1000kV / 500kV / 220kV three-level electromagnetic ring network structure will appear. At the same time, the grid structure will become more and more Complicated, analytical calculation work is also more difficult. Therefore, using the transmission section instead of a single component to analyze and control the power grid will become an inevitable choice for the daily work of power grid operators. [0003] For the electromagnetic ring network, when the high-voltage branch is disconnected, the power flow shifts to the low-voltage branch with a sma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00
CPCH02J3/00H02J3/001
Inventor 夏鹏刘文颖史可琴梁安琪惠建峰蔡万通王康李亚龙朱丹丹郭鹏迟方德魏泽田王方雨叶湖芳李慧勇付熙玮张雨薇田浩郭红林吕思琦
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)