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Power distribution network disconnection fault interval positioning method

A disconnection fault and location method technology, which is applied in the field of power transmission and distribution, can solve the problems of inability to locate faulty small segments and high deployment costs, and achieve the effects of easy large-scale deployment, avoiding insulation and grounding problems, and reducing implementation costs

Active Publication Date: 2020-04-10
WUHAN UNIV
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Problems solved by technology

[0004] Aiming at the shortcomings of existing technologies such as the inability to locate small sections of disconnection faults and high deployment costs, the present invention provides a method and system for locating distribution network disconnection fault intervals, which are used to locate disconnection faults of distribution lines Identification and Interval Localization

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  • Power distribution network disconnection fault interval positioning method
  • Power distribution network disconnection fault interval positioning method
  • Power distribution network disconnection fault interval positioning method

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Embodiment Construction

[0034] 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 some, not all, embodiments of the present invention. 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.

[0035] like figure 1 Shown is a schematic diagram of an embodiment of the present invention. The technical solution of the system applied by the method of the present invention is a distribution network disconnection fault zone positioning system, which is composed of multiple fault monitoring units and a fault monitoring concentrator.

[0036] The implementation of the fault monitoring unit is as follows image 3As shown, the fault monitoring unit is compose...

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Abstract

The invention provides a power distribution network disconnection fault interval positioning method. The method comprises the following steps of: deploying fault monitoring units in line segments to measure line current and line electric field, and identifying line branches and phases where broken lines are located; deploying fault monitoring concentrators at the head ends of the lines and branches, collecting electric field phase angles returned by fault monitoring units of the lines where the broken lines are located, comparing the electric field phase angle differences of adjacent monitoring points, identifying the interval where broken line points are located, and further narrowing the broken line searching range. Complex load flow calculation and voltage measurement are not needed, break line fault identification and interval positioning are carried out only according to the current and electric field, the cost is low, and field application is simple and reliable.

Description

technical field [0001] The invention belongs to the technical field of power transmission and distribution in electric power systems and automation thereof, and in particular relates to a method for locating a disconnected fault section of a distribution network. Background technique [0002] Distribution network generally refers to a power network with a voltage level of 35kV and below, which is used to supply power to various loads and distribution substations. Due to the wide distribution area of ​​the distribution network, the topology is more complex than the main network, and the operating environment is relatively harsh, and because it is susceptible to lightning strikes, mechanical external forces, heavy loads, and overloads, it will cause disconnection, which will lead to power outages and secondary disasters after disconnection. Disconnection faults in the distribution network need to be repaired in time. [0003] In the existing technologies for fault location in...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/08G01R31/54
CPCG01R31/086G01R31/088Y04S10/52
Inventor 刘振盛
Owner WUHAN UNIV
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