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Distributed wave recording graphic analysis method, device, equipment and medium

An analysis method and graphical technology, applied in the direction of fault location, fault detection according to conductor type, information technology support system, etc., can solve problems that affect the restoration of power supply speed and safe operation of the power grid, and achieve the effect of rapid positioning and resolution

Active Publication Date: 2020-07-10
ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] When a fault occurs in the DC transmission system, the fault recordings distributed in each device will be transferred to the operator in a centralized manner. The recordings of each device have different time lengths and sampling rates. Operators need to manually sort out and analyze many discrete information such as fault recordings. It is impossible to quickly locate and solve the fault in a short time, thus affecting the speed of power supply restoration and the safe operation of the power grid

Method used

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  • Distributed wave recording graphic analysis method, device, equipment and medium
  • Distributed wave recording graphic analysis method, device, equipment and medium
  • Distributed wave recording graphic analysis method, device, equipment and medium

Examples

Experimental program
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Effect test

Embodiment 1

[0074] see figure 1 , a schematic flow chart of the distributed wave recording graphical analysis method provided by the first embodiment of the present invention;

[0075] S11. Synchronize the distributed wave recording curves to be synchronized to obtain the synchronous wave recording curves.

[0076] It should be noted that calculations between different physical quantities that are not at the same time are meaningless, so the time scales are not aligned, and the time of the electrical quantities is inconsistent, so formulas cannot be used to calculate and problems cannot be analyzed. Synchronization of wave recording curves is required here.

[0077] In this embodiment, the distributed wave recording includes multiple wave recording files from multiple control and protection devices, each control and protection device has a corresponding wave recording file, and each wave recording curve inside each wave recording file has the same The start and end time and sampling rate...

Embodiment 2

[0091] Embodiment two, on the basis of embodiment one, refer to Image 6 It is a schematic flowchart of another distributed wave recording graphical analysis method provided by the second embodiment of the present invention;

[0092] Preferably, according to the mapping relationship between the synchronous wave recording curve and the primary equipment of the direct current transmission system, displaying the dynamic circuit diagram includes:

[0093] S21. Map the synchronous wave recording curve and the primary equipment of the direct current transmission system to obtain a mapped line.

[0094] In this embodiment, the synchronous wave recording curve includes the reference wave recording curve and the wave recording curve to be synchronized, and the primary equipment of the direct current transmission system includes a generator (motor), a transformer, a circuit breaker, an isolating switch , automatic switch, contactor, knife switch, busbar, transmission line, power cable,...

Embodiment 3

[0137] Embodiment three, on the basis of embodiment one, refer to Figure 11 It is a schematic flowchart of another distributed wave recording graphical analysis method provided by the third embodiment of the present invention;

[0138] Preferably, the automatic fault location and display on the dynamic circuit diagram according to the protection principle includes:

[0139] S31. Obtain fault points on the dynamic circuit diagram according to protection principles;

[0140] S32. Perform automatic fault location and display on the dynamic circuit diagram according to the fault point.

[0141] Preferably, said obtaining fault points on said dynamic circuit diagram according to protection principles includes:

[0142] When the current value is higher than the preset value, obtain the overcurrent fault point;

[0143] When the total current of the same node or a generalized node is not zero, obtain the regional leakage current fault point;

[0144] When the voltage is higher t...

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Abstract

The invention discloses a graphic analysis method for distributed wave recording, which comprises the following steps of: synchronizing a distributed wave recording curve to be synchronized to obtaina synchronous wave recording curve; displaying a dynamic loop diagram according to the synchronous wave recording curve and the mapping relation of the primary equipment of a direct current transmission system; carrying out automatic fault positioning and displaying on the dynamic loop diagram according to the protection principle. The method is used for realizing fast positioning and solving thefault in a short time, thereby improving the power supply recovery speed and ensuring the safe operation of the power grid.

Description

technical field [0001] The invention relates to the field of power systems, in particular to a distributed wave recording graphic analysis method, device, equipment and medium. Background technique [0002] The modern power system is a huge and complex system of power generation, transmission and consumption. In the process of system operation and production, a medium-scale power network has dozens to hundreds of generators running every day, and thousands of transmission lines are connected to hundreds of substations of different voltage levels to continuously deliver power to users. Therefore, it is required that the power system can supply power safely and reliably. In fact, there are many power generation, transmission equipment and transmission lines in a power network, and failures will occur every day. [0003] Fault recording data is the main basis for accident analysis, and can be applied to fault type judgment, fault distance measurement, protection behavior analy...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/08
CPCG01R31/085Y04S10/52
Inventor 卢远宏郭琦李书勇郭海平
Owner ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD
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