Power distribution network self-healing control method

A technology of self-healing control and distribution network, applied in electrical components, circuit devices, emergency protection circuit devices, etc., can solve problems such as abnormal operation of equipment, disturbance, and product scrapping.

Inactive Publication Date: 2015-06-10
STATE GRID CORP OF CHINA +1
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  • Abstract
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Problems solved by technology

At the same time, with the wide application of high-tech electronic equipment in social production and life, such as programmable controllers, frequency conversion speed control equipment, contactors, computers and database systems, and personal computers, these equipments have put forward higher requirements on the quality of power supply. High requirements, even a brief power interruption or voltage disturbance, may cause abnormal operation of equipment, resulting in serious accidents such as production line stoppage, equipment damage, product scrapping, and data loss
At present, there are many power supply quality disturbance phenomena in the operation of the power grid, such as the phenomenon that the effective value of the voltage suddenly drops due to the short-circuit fault of the power grid and returns to normal after a short period of time, that is, the voltage sag, and the instantaneous The successful action of reclosing after tripping in the event of a fault, the action of the automatic input device of the backup power supply of the substation (referred to as the individual input device) will cause short-term power failures in the user's power supply for a few seconds to a few minutes, etc.

Method used

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  • Power distribution network self-healing control method

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Embodiment Construction

[0044] A distribution network self-healing control method mainly includes fault location, fault recovery and self-healing evaluation.

[0045] For faults that occur in general sections or areas of the distribution network, the specific fault location steps are as follows:

[0046] l. Determine the initial search interval. In the hierarchical model of the distribution network, the power point As the base point, the matrix forming the base point layer is: ,in , because the fault section or area must be located in the layered topology model, and the base layer in the layered model, that is, the power point, must have a fault current flowing through it, and there must be a vertex in each layer behind it without a fault current flowing through it, so choose The base point layer is the power point as the initial search interval.

[0047] 2. Establish a network topology description matrix D. Number each switchgear on the feeder line of the distribution network without con...

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Abstract

The invention provides a power distribution network self-healing control method. The method mainly comprises fault positioning, fault recovery and self-healing evaluation; continuous online diagnosis and evaluation are performed on the operating conditions of the power grid by use of an advanced monitoring method so as to discover and eliminate hidden fault danger immediately; in case of a fault, the fault can be isolated quickly and self-recovery can be realized; the influence of the fault is minimized, and safe and stable operation of the power grid and good power supply quality are ensured.

Description

technical field [0001] The invention relates to the technical field of distribution network control, in particular to a distribution network self-healing control method. Background technique [0002] With the development of social economy, the economic losses caused by power outages and their impact on society are increasing. At the same time, with the wide application of high-tech electronic equipment in social production and life, such as programmable controllers, frequency conversion speed control equipment, contactors, computers and database systems, and personal computers, these equipments have put forward higher requirements on the quality of power supply. High requirements, even a brief power interruption or voltage disturbance, may cause abnormal operation of the equipment, resulting in serious accidents such as production line stoppage, equipment damage, product scrapping, and data loss. At present, there are many power supply quality disturbance phenomena in the o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H7/26H02H3/06H02J13/00
CPCY02E60/00Y04S10/20
Inventor 李锰全少理孙义豪李秋燕郭勇蒋小亮李科
Owner STATE GRID CORP OF CHINA
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