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Power distribution network integrated protection method merging line self-recovery

A line and distribution network technology, applied in emergency protection circuit devices, circuit devices, AC network circuits, etc., can solve problems such as difficulty in protection setting, complex changes in the operation mode of new distribution networks, repeated investment, and heavy management and maintenance workload. , to achieve the effect of sufficient computing time and excellent protection and control performance

Active Publication Date: 2018-04-03
SHENZHEN POWER SUPPLY BUREAU
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0003] At present, secondary equipment such as distribution network protection, voltage and reactive power control, and distribution automation are arranged separately and built separately. The interoperability between various equipment is poor, and it is difficult to achieve plug and play. There are repeated investments, Management and maintenance workload problems
[0004] The traditional protection is only responsible for removing faults (due to the complex changes in the operation mode of the new distribution network, it is difficult to set the conventional protection), while the load transfer and power supply restoration are completed by safety devices or measurement and control devices such as backup automatic switching and reclosing, which are difficult to meet more High-level "self-healing" goals

Method used

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Embodiment Construction

[0039] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0040] Here, it should also be noted that, in order to avoid obscuring the present invention due to unnecessary details, only the structures and / or processing steps closely related to the solution according to the present invention are shown in the drawings, and the related Other details are not relevant to the invention.

[0041] It can be understood that the present invention provides an integrated protection method for distribution network tha...

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Abstract

The invention provides a power distribution network integrated protection method merging line self-recovery, the method comprises the following steps: a step S10, when a power distribution network fails, removing fault through breaker operation, and obtaining fault information in the power distribution network in real time, wherein the fault information is an overcurrent information of a branch inthe power distribution network; a step S11, based on a net base structure matrix of the power distribution network, determining type and fault position through computation for corresponding matrix, and performing fault isolation; a step S12, based on an accessibility matrix, partitioning the power distribution network subjected to fault isolation, and recovering power supply of a passive region connected with an interconnection switch; a step S13, comprehensively considering line overload condition, load sensitivity and load importance degree to reconstruct the power distribution network. Byimplementing the power distribution network integrated protection method merging line self-recovery, better protective control performance with 'self-recovery' property can be obtained.

Description

technical field [0001] The invention relates to the technical field of power supply network, in particular to a distribution network integrated protection method with integrated line self-healing. Background technique [0002] The existing distribution network protection methods are mainly traditional protection schemes, and different protection methods are used for different faults; the existing fault location and fault isolation technologies are relatively mature in small resistance grounding system faults, but in small current grounding systems It is not yet mature; self-healing mainly embodies and protects a fault backup self-switching system that is independent of each other. [0003] At present, secondary equipment such as distribution network protection, voltage and reactive power control, and distribution automation are arranged separately and built separately. The interoperability between various equipment is poor, and it is difficult to achieve plug and play. There...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00H02H7/26G01R31/08
CPCG01R31/086H02H7/26H02J3/00H02J3/001Y04S10/52
Inventor 李艳张安龙袁志军卢正飞王廷凰苏忠阳
Owner SHENZHEN POWER SUPPLY BUREAU
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