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A distributed wave recording synchronization method, device and apparatus, and a medium

A distributed, wave-recording technology, applied in the field of power systems, can solve problems such as synchronization errors, affecting the safe operation of power grids that affect the speed of power supply restoration, and achieve the effects of accelerating the speed, accurately realizing the synchronization of the wave-recording curve, and reducing the amount of calculation.

Inactive Publication Date: 2018-10-19
CHINA SOUTH POWER GRID ELECTRIC POWER RES INST +2
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  • 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, which will affect the speed of power supply restoration and the safe operation of the power grid, so it is necessary to synchronize the distributed recording
[0005] Regarding the method of synchronizing wave recording curves, one way of thinking is to detect the sudden change feature of wave recording curves. This method uses some features of the curves instead of all features, and may cause synchronization errors.

Method used

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  • A distributed wave recording synchronization method, device and apparatus, and a medium
  • A distributed wave recording synchronization method, device and apparatus, and a medium
  • A distributed wave recording synchronization method, device and apparatus, and a medium

Examples

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Embodiment 1

[0063] see figure 1 , a schematic flowchart of the distributed wave recording synchronization method provided by the first embodiment of the present invention;

[0064] S11. Obtain the reference wave recording curve and the wave recording curve to be synchronized;

[0065] It should be noted that 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 in each wave recording file has the same The start and end time and sampling rate, that is to say, the recordings in each file are synchronized, but the recording curves in different recording files do not necessarily have the same starting and ending time and sampling rate. The synchronization of wave recording files, as long as one of the wave recording files is used as the reference wave recording file, a certain wave recording curve a in the reference wave recording...

Embodiment 2

[0096] Embodiment two, on the basis of embodiment one, refer to Figure 9 It is a schematic flowchart of another distributed recording synchronization method provided by the second embodiment of the present invention;

[0097] Preferably, the obtaining the optimal matching time of the continuous matching function according to the simulated annealing algorithm based on global pre-traversal includes:

[0098] S31. Obtain the full-range low-density ergodic curve of the continuous matching function according to the ergodic method of small equal parts n;

[0099] S32. Acquire the range of the corresponding low-density ergodic curve when the value of the continuous matching function is small;

[0100] S33. Within the range, obtain the optimal matching time of the continuous matching function according to a simulated annealing algorithm with a faster decay of the temperature T.

[0101] It should be noted that, in the matching function domain range T τ The τ corresponding to the m...

Embodiment 3

[0111] Embodiment three, on the basis of embodiment one, refer to Figure 10 It is a schematic flowchart of another distributed wave recording synchronization method provided by the third embodiment of the present invention;

[0112] The synchronization of the reference wave recording curve and the wave recording curve to be synchronized according to the optimal matching time and the discrete matching function includes:

[0113] S41. Obtain the original sampling points of the reference wave recording curve and the wave recording curve to be synchronized;

[0114] S42. Calculate the discrete matching function according to the original sampling points, and obtain the calculated discrete matching function;

[0115] S43. Synchronize the reference wave recording curve and the to-be-synchronized wave recording curve according to the optimal matching time and the calculated discrete matching function.

[0116] It should be noted that for the two curves to be synchronized, the recor...

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Abstract

The invention discloses a distributed wave recording synchronization method, which comprises the following steps: obtaining a reference wave recording curve and a to-be-synchronized wave recording curve; obtaining a domain of definition according to the reference wave recording curve and the to-be-synchronized wave recording curve; obtaining a continuous matching function according to the domain of definition and the least square method; obtaining an optimal matching time of the continuous matching function according to a simulated annealing algorithm based on global pre-traversal so as to reduce computing complexity, increase the speed of searching for an optimal value and quickly realize obtaining of the optimal matching time while the precision is guaranteed, performing discretization on the continuous matching function according to a discrete integral formula, and obtaining a discrete matching function; and realizing synchronization of the reference wave recording curve and the to-be-synchronized wave recording curve according to the optimal matching time and the discrete matching function. The discrete matching function is computed with the least computation and space occupation, and synchronization of curves different in sampling frequency and time length is finally realized.

Description

technical field [0001] The invention relates to the field of power systems, in particular to a distributed wave recording synchronization method, device, equipment, and medium. Background technique [0002] With the rapid development of smart grid technology, the power sector has higher and higher requirements for distributed applications of fault recording devices, and stricter requirements for synchronization of recordings in distributed systems. [0003] The fault recorder is a device that can automatically record the changes of various electrical quantities before and after the fault when the power system fails and oscillates. It can record the whole process changes of system current, voltage and its derivatives (such as active power, reactive power and system frequency) caused by large disturbances such as short-circuit faults, system oscillations, frequency collapse, and voltage collapse. It is mainly used to detect the action behavior of relay protection and safety a...

Claims

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Application Information

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IPC IPC(8): G01R31/08G01R31/02G06K9/00
CPCG01R31/086G01R31/088G01R31/50G06F2218/12
Inventor 卢远宏郭琦李书勇郭海平
Owner CHINA SOUTH POWER GRID ELECTRIC POWER RES INST
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