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High-voltage power distribution network transfer optimization method considering wiring units and power transmission blockage

A technology of wiring unit and optimization method, applied in the electric power field, can solve the problems of power supply recovery, 220kV station overload, voltage loss, etc., and achieve the effect of ensuring safe and stable operation and eliminating the overload of the main transformer.

Pending Publication Date: 2022-01-14
国网四川省电力公司天府新区供电公司 +2
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AI Technical Summary

Problems solved by technology

When the 220kV power grid fails and the 220kV station loses voltage, there may be two problems at this time: 1) How to restore the power supply to the 110kV station caused by the 220kV station voltage loss; 2) The 220kV station voltage loss As a result, part of the 110kV standby automatic switching operation caused the main transformer of the adjacent 220kV station to be overloaded, and how to arrange load transfer

Method used

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  • High-voltage power distribution network transfer optimization method considering wiring units and power transmission blockage
  • High-voltage power distribution network transfer optimization method considering wiring units and power transmission blockage
  • High-voltage power distribution network transfer optimization method considering wiring units and power transmission blockage

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Embodiment 1

[0036] This embodiment 1 provides a high-voltage distribution network transfer optimization method that takes into account wiring units and transmission congestion, such as figure 1 shown, including the following steps:

[0037] S1, obtain the number of line switches of the high-voltage distribution network after the failure of the main substation, and construct the power supply recovery sub-model of the high-voltage distribution network after the failure of the main substation according to the number of line switches;

[0038] S2, according to the switch state of the high-voltage distribution network line and the reverse charging of the high-voltage distribution network busbar, establish the sub-model of the high-voltage distribution network transfer supply optimization sub-model with the main substation overloaded;

[0039] S3, according to the power supply restoration sub-model and the transfer optimization sub-model of the high-voltage distribution network, jointly establi...

Embodiment 2

[0053] In this second embodiment, on the basis of the first embodiment, the load transfer test and analysis of an actual 110kV urban high-voltage distribution network are carried out with specific implementation instructions. exist image 3 Among them, Jinniu, Xiner Village, Tangkan Street, Anshun Bridge, Wuhou, and Shiyang are all 5 2×180MVA 220kV stations, and the rest are 110kV stations.

[0054] exist image 3 Among them, it covers 6 types of typical 110kV wiring methods, such as the direct supply wiring method of 110kV Oasis Station; The one-station series connection mode formed by the same station; the T-shaped inter-station series connection mode formed by the 110kV Zhengfu Street Station and the West First Ring Station; the T-shaped system formed by the 110kV Jiuliti Station and No. 1 and 2 main transformers of the Xingchen Station The same-station series connection mode, in which the 110kV Xingchen Station No. 3 main transformer is powered by the T-connection line; ...

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Abstract

The invention discloses a high-voltage power distribution network transfer optimization method considering wiring units and power transmission congestion. The method comprises the steps of obtaining the number of all line switches of a high-voltage power distribution network after a fault of a main transformer substation, and constructing a power supply recovery sub-model of the high-voltage power distribution network after the fault of the main transformer substation according to the number of the line switches, according to the on-off state of the high-voltage power distribution network line and the reverse charging of the high-voltage power distribution network bus, establishing a high-voltage power distribution network transfer optimization sub-model of the overload of the main substation, and according to the power supply recovery sub-model and the transfer optimization sub-model of the high-voltage power distribution network, jointly establishing a transfer optimization model of the high-voltage power distribution network under power transmission blockage of the main substation. According to the method, the power supply recovery problem after one main substation loses voltage and the main transformer overload problem of other main substations are solved through the established model, the optimal voltage-loss high-voltage distribution network power supply recovery scheme and the corresponding optimal transfer scheme of the main transformer overload of the main substations are given, the main transformer overload problem of the main substations is eliminated, and safe and stable operation of a power grid is ensured.

Description

technical field [0001] The invention relates to the field of electric power technology, more specifically, it relates to a high-voltage distribution network transfer optimization method considering wiring units and transmission congestion. Background technique [0002] According to the strength of attracting investment in some hot cities, the new urban power grid load will show multi-polar growth. The new construction of the existing upper and lower power grids involves various problems such as compensation for the demolition of houses in transmission corridors, and a long construction period for iron tower pouring, which has seriously lagged behind the load growth rate of economic development hotspots. During the peak load period, whether it is the upper-level 500kV power supply, 220 / 110kV power grid, or 10kV distribution network, there will be multiple overloads of varying degrees, resulting in large-scale transmission congestion. It can be seen that the asynchronous deve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00
CPCH02J3/00H02J3/0073H02J3/007H02J2203/10H02J2203/20
Inventor 李勇雷超刘晓宇税少洪
Owner 国网四川省电力公司天府新区供电公司
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