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

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...

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.

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