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Method and system for detecting distribution room low-voltage fault type of distribution transformer

A distribution transformer and low-voltage fault technology, which is applied in the field of detection of low-voltage fault types in the distribution transformer area, can solve problems such as indeterminacy, and achieve the effect of improving accuracy

Active Publication Date: 2015-01-14
ELECTRIC POWER RES INST OF GUANGDONG POWER GRID +1
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  • Application Information

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Problems solved by technology

[0005] Based on this, it is necessary to provide a method and system for detecting the type of low-voltage faults in the distribution transformer area for the problem that the specific fault type causing the low voltage cannot be determined.

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  • Method and system for detecting distribution room low-voltage fault type of distribution transformer
  • Method and system for detecting distribution room low-voltage fault type of distribution transformer
  • Method and system for detecting distribution room low-voltage fault type of distribution transformer

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Embodiment Construction

[0022] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0023] refer to figure 1 , figure 1 An application scene diagram of a detection method for a low-voltage fault type in a distribution transformer station area in an embodiment of the present invention is shown. It includes a 10KV low-voltage distribution network 110 , a distribution transformer 120 and a feeder line 130 at the low-voltage side of the distribution transformer. The feeder line 130 on the low-voltage side of the distribution transformer may include trunk sections, nodes, branches, reactive power compensation, and the like. In a specific application example, the distribution transfo...

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Abstract

The invention provides a method and system for detecting a distribution room low-voltage fault type of a distribution transformer. The method includes the steps of building a mathematical model of a distribution transformer with a distribution room low-voltage fault and a mathematical model of a line, calculating secondary side no-load voltage of the distribution transformer according to the mathematical model of the distribution transformer, determining a first influence value of primary side voltage of the distribution transformer on distribution room low voltage, calculating voltage drop of the distribution transformer according to the mathematical model of the distribution transformer, calculating the difference value of the voltage drop of the distribution transformer and short-circuited voltage of the distribution transformer, obtaining a second influence value of the voltage drop of the distribution transformer on the distribution room low voltage, calculating voltage drop of the line according to the mathematical model of the line, calculating the difference value of the voltage drop of the line and an upper limit value of the voltage drop of the line, obtaining a third influence value of the voltage drop of the line on the distribution room low voltage, and determining the distribution room low-voltage fault type of the distribution transformer according to the first influence value, the second influence value and the third influence value. Detection accuracy of the distribution room low-voltage fault type is improved by means of the method and system.

Description

technical field [0001] The invention relates to the technical field of distribution transformer detection, in particular to a method and system for detecting low-voltage fault types in a distribution transformer station area. Background technique [0002] The distribution network is the link that supplies power to users in the four major links of power generation, transformation, transmission and distribution of electric power installations. The 10kV low-voltage distribution network is at the terminal of the distribution network and is directly connected to 380 / 220V low-voltage users through distribution transformers. . The distribution transformer station area is an area composed of distribution transformers, low-voltage side feeder lines of distribution transformers and user groups supplied by the distribution transformers. [0003] As an important part of the distribution network that directly distributes electric energy to low-voltage users, low-voltage problems in the ...

Claims

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Application Information

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IPC IPC(8): G06Q50/06G06F17/50
CPCG06F30/367G06Q50/06Y02E60/00
Inventor 马明李端姣徐柏榆史伟伟王玲元梨花李玎刘正富李兰芳
Owner ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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