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A method of lightning strike overvoltage online distance measurement and fault location

A lightning strike overvoltage and fault location technology, which is applied in the direction of fault location, fault detection according to conductor type, and electrical measurement, can solve the problems affecting the efficiency of maintenance operations and low precision, so as to improve the reliability and intelligent level of power supply, reduce the O&M burden and the effect of shortening troubleshooting time

Active Publication Date: 2021-07-27
YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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Problems solved by technology

[0008] This application provides a lightning strike overvoltage online distance measurement and fault location method to solve the problems of low accuracy and affecting the efficiency of maintenance operations in the current lightning strike overvoltage fault point location method

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  • A method of lightning strike overvoltage online distance measurement and fault location
  • A method of lightning strike overvoltage online distance measurement and fault location
  • A method of lightning strike overvoltage online distance measurement and fault location

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Embodiment Construction

[0057] The embodiments will be described in detail hereinafter, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following examples do not represent all implementations consistent with this application. These are merely examples of systems and methods consistent with aspects of the present application as recited in the claims.

[0058] see figure 1 , is a schematic diagram of an application scenario of an embodiment of the present application; combined with figure 2 , is a schematic diagram of the principle of an embodiment of the present application; and combined Figure 5 , is a flowchart of an embodiment of the present application; it is convenient to understand the technical solutions of the following embodiments.

[0059] The present application...

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Abstract

The application belongs to the technical field of lightning location for power transmission and distribution lines in electric power systems, and in particular relates to an online distance measurement and fault location method for lightning strike overvoltage. This application discloses a lightning overvoltage online distance measurement and fault location method, which includes installing a number of distributed voltage monitoring sensors on the transmission and distribution lines to monitor the line voltage, using a signal generator to inject pulse signals into the line, and according to each voltage The pulse signal detected by the monitoring sensor is compared to the phase of each cycle of the system power frequency voltage to realize online distance measurement. When the lightning voltage occurs, the location of the fault can be judged by the steep attenuation characteristics of the lightning overvoltage. This application proposes a lightning strike overvoltage online distance measurement and fault location method, which uses the combination of lightning strike overvoltage phase and steepness transmission characteristics to perform online distance measurement and fault location, and realizes accurate and fast lightning strike location of power transmission and distribution lines Positioning greatly reduces the workload of operation and maintenance personnel and improves the reliability of power supply.

Description

technical field [0001] The present application relates to the technical field of lightning location for power transmission and distribution lines in power systems, and in particular to an online distance measurement and fault location method for lightning strike overvoltage. Background technique [0002] In the power system, transmission and distribution lines, as an important part of the power grid system, have received more and more attention and attention in recent years with the development of smart grid construction. Installing various condition monitoring equipment on transmission line towers is the basic work of building intelligent transmission lines. At present, the construction of power grids in various places also regards it as the main development direction. [0003] Lightning is an important factor that endangers the safety of power systems. Lightning is extremely harmful to the safe operation of transmission lines, often causing insulator flashover accidents. L...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/08
CPCG01R31/085G01R31/088
Inventor 刘红文张恭源王科柴晨超张春丽
Owner YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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