Wide-area fault recording system and synchronization method

Abstract

The invention discloses a wide-area fault recording system and a synchronization method. The method includes the steps that fault recording devices are arranged on all geographically-dispersed transformer substations respectively; all the fault recording devices are connected to a communication network, and the different devices in same working groups can be communicated through the network; after self-starting criterions of all the fault recording devices are started, the fault recording devices send starting signals (network starting signals) to the other devices in the same working groups, and absolute time marks of starting moments are carried in the sent signals; delta T time begins to be waited, the earliest starting moments in all the starting signals (the starting signals include the self-starting signals and the network starting signals) in the delta T time are compared and selected, and wave files are started to be stored and recorded according to the preset recording regulation from the moments. The requirement of the synchronization recording method for the real-time performance of the communication network is low, wide-area synchronization recording can be achieved through an existing non-real-time communication network, the investment of special real-time channels is saved, and the large practical value is achieved.

Description

technical field [0001] The invention relates to a remote synchronous wave recording method in a wide area, which is suitable for various types of power supply systems that need to realize wide area synchronous wave recording. Background technique [0002] In the traditional oscilloscope configuration scheme, fault oscilloscopes are usually arranged in different geographically dispersed substations, and the start-up conditions of each device are set independently of each other. Once a fault occurs in the power supply system, the distributed fault recorders will independently judge whether to start the record. In this way, the following two situations will occur: [0003] (1) When a fault occurs, only some fault recorders start the wave recording, and the other part of the wave recorders do not start the wave recording because the fault characteristics are not obvious, or the setting threshold is high; [0004] (2) All fault recorders started wave recording when the fault oc...

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Problems solved by technology

[0003] (1) When a fault occurs, only some fault recorders start the wave recording, and the other part of the wave recorders do not start the wave recording because the fault characteristics are not obvious, or the setting threshold is high;

[0004] (2) All fault recorders started wave recording when the fault occurred, but due to different fault characteristics and different setting thresholds, the wave recording was not started synchronously;

The E1 network is affected by the dynamic generation of routing links, and the communication delay has a large discreteness; and the communication bandwidth of the E1 network is only 2Mbps, which cannot meet the communication bandwidth requirements of IEC61850-9-2

In this case, for the synchronization method in the above patent, it is necessary to build a dedicated wide-area process layer communication network, and the construction cost is too high

[0008] Therefore, in response to the above needs, there is no cost-effective solution in the public information

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